Adding upstream version 0.3.3.upstream/0.3.3upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

105 files changed, 11918 insertions, 0 deletions

diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
new file mode 100644
index 0000000..0e56079
--- /dev/null
+++ b/.github/workflows/tests.yml
@@ -0,0 +1,77 @@
+# This workflow will install Python dependencies, run tests and lint with a variety of Python versions
+# For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions
+
+name: continuous-integration
+
+on:
+  push:
+    branches: [master]
+    tags:
+      - 'v*'
+  pull_request:
+
+jobs:
+
+  pre-commit:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Python 3.8
+      uses: actions/setup-python@v2
+      with:
+        python-version: 3.8
+    - uses: pre-commit/action@v2.0.0
+
+  tests:
+
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ['pypy-3.7', '3.7', '3.8', '3.9', '3.10']
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v2
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install -e .[testing]
+    - name: Run pytest
+      run: |
+        pytest --cov=mdit_py_plugins --cov-report=xml --cov-report=term-missing
+    - name: Upload to Codecov
+      uses: codecov/codecov-action@v1
+      with:
+        name: mdit-py-plugins-pytests
+        flags: pytests
+        file: ./coverage.xml
+        fail_ci_if_error: true
+
+  publish:
+
+    name: Publish to PyPi
+    needs: [pre-commit, tests]
+    if: github.event_name == 'push' && startsWith(github.event.ref, 'refs/tags')
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout source
+      uses: actions/checkout@v2
+    - name: Set up Python
+      uses: actions/setup-python@v2
+      with:
+        python-version: "3.8"
+    - name: install flit
+      run: |
+        pip install flit~=3.4
+    - name: Build and publish
+      run: |
+        flit publish
+      env:
+        FLIT_USERNAME: __token__
+        FLIT_PASSWORD: ${{ secrets.PYPI_KEY }}
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..546e6c2
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,143 @@
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+pip-wheel-metadata/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+db.sqlite3-journal
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+.python-version
+
+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if having platform-specific dependencies or dependencies
+#   having no cross-platform support, pipenv may install dependencies that don't work, or not
+#   install all needed dependencies.
+#Pipfile.lock
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
+
+benchmark/extra/
+node_modules/
+coverage/
+demo/
+apidoc/
+*.log
+__pycache__/
+.ropeproject/
+*.egg-info/
+.vscode/
+.DS_Store
+
+docs/api/
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
new file mode 100644
index 0000000..b357ba0
--- /dev/null
+++ b/.pre-commit-config.yaml
@@ -0,0 +1,42 @@
+# Install pre-commit hooks via
+# pre-commit install
+
+exclude: >
+    (?x)^(
+      \.vscode/settings\.json|
+      test.*\.md|
+      test.*\.txt|
+      test.*\.html|
+    )$
+
+repos:
+
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v4.3.0
+    hooks:
+    - id: check-json
+    - id: check-yaml
+    - id: end-of-file-fixer
+    - id: trailing-whitespace
+
+  - repo: https://github.com/timothycrosley/isort
+    rev: 5.10.1
+    hooks:
+    - id: isort
+
+  - repo: https://github.com/psf/black
+    rev: 22.8.0
+    hooks:
+    - id: black
+
+  - repo: https://github.com/pycqa/flake8
+    rev: 3.9.2
+    hooks:
+    - id: flake8
+      additional_dependencies: [flake8-bugbear==21.3.1]
+
+  - repo: https://github.com/pre-commit/mirrors-mypy
+    rev: v0.971
+    hooks:
+    - id: mypy
+      additional_dependencies: [markdown-it-py~=2.0]
diff --git a/.readthedocs.yml b/.readthedocs.yml
new file mode 100644
index 0000000..6abd0fd
--- /dev/null
+++ b/.readthedocs.yml
@@ -0,0 +1,12 @@
+version: 2
+
+python:
+  version: 3
+  install:
+  - method: pip
+    path: .
+    extra_requirements: [rtd]
+
+sphinx:
+  builder: html
+  fail_on_warning: true
diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..bb6acd5
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,65 @@
+# Change Log
+
+## 0.3.3 - 2022-12-06
+
+🐛 FIX: span with end of inline before attrs
+
+## 0.3.2 - 2022-12-05
+
+- ✨ NEW: Port `admon` plugin by @KyleKing ([#53](https://github.com/executablebooks/mdit-py-plugins/pull/53))
+- ✨ NEW: Add span parsing to inline attributes plugin by @chrisjsewell ([#55](https://github.com/executablebooks/mdit-py-plugins/pull/55))
+- 🐛 FIX: Task list item marker can be followed by any GFM whitespace by @hukkin in ([#42](https://github.com/executablebooks/mdit-py-plugins/pull/42))
+
+**Full Changelog**: [v0.3.1...v0.4.0](https://github.com/executablebooks/mdit-py-plugins/compare/v0.3.1...v0.4.0)
+
+## 0.3.1 - 2022-09-27
+
+- ⬆️ UPGRADE: Drop Python 3.6, support Python 3.10
+- 🐛 FIX: Parsing when newline is between footnote ID and first paragraph
+- 🐛 FIX: Anchor ids in separate renders no longer affect each other.
+- ✨ NEW: Add `attrs_plugin`
+- 🔧 MAINTAIN: Use flit PEP 621 package build
+
+## 0.3.0 - 2021-12-03
+
+- ⬆️ UPGRADE: Compatible with markdown-it-py `v2`.
+- ✨ NEW: Add field list plugin, Based on the [restructuredtext syntax](https://docutils.sourceforge.io/docs/ref/rst/restructuredtext.html#field-lists)
+- ♻️ REFACTOR: dollarmath plugin, `math_block_eqno` -> `math_block_label` token
+- ♻️ REFACTOR: Remove AttrDict usage from texmath
+- 👌 IMPROVE: Default HTML rendering for dollarmath and amsmath plugins
+- 👌 IMPROVE: Add render options for dollarmath and amsmath plugins
+- 👌 IMPROVE: MyST parsing of target blocks (allow whitespace) and roles (allow for new lines)
+
+## 0.2.8 - 2021-05-03
+
+🐛 FIX: `wordcount` update of minutes
+
+## 0.2.7 - 2021-05-03
+
+- ⬆️ UPDATE: markdown-it-py~=1.0
+- ✨ NEW: Add `wordcount_plugin`
+- 👌 IMPROVE: `dollarmath`: Allow inline double-dollar
+- 👌 IMPROVE: `myst_blocks`: Parse multiline comments
+- 👌 IMPROVE: Replace use of `env` as an `AttrDict`
+- 🐛 FIX: `front_matter`: don't duplicate content storage in `Token.meta`
+
+## 0.2.6 - 2021-03-17
+
+👌 IMPROVE: Remove direct use of `Token.attrs`
+
+## 0.2.5 - 2021-02-06
+
+🐛 FIX: front-matter: `IndexError` if first line is single dash
+
+## 0.2.2 - 2020-12-16
+
+✨ NEW: Add substitution_plugin
+(improvements in 0.2.3 and 0.2.4)
+
+## 0.2.0 - 2020-12-14
+
+Add mypy type-checking, code taken from: https://github.com/executablebooks/markdown-it-py/commit/2eb1fe6b47cc0ad4ebe954cabd91fb8e52a2f03d
+
+## 0.1.0 - 2020-12-14
+
+First release, code taken from: https://github.com/executablebooks/markdown-it-py/commit/3a5bdcc98e67de9df26ebb8bc7cd0221a0d6b51b
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..582ddf5
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2020 ExecutableBookProject
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..c831a87
--- /dev/null
+++ b/README.md
@@ -0,0 +1,22 @@
+# mdit-py-plugins
+
+[![Github-CI][github-ci]][github-link]
+[![Coverage Status][codecov-badge]][codecov-link]
+[![PyPI][pypi-badge]][pypi-link]
+[![Conda][conda-badge]][conda-link]
+[![Code style: black][black-badge]][black-link]
+
+Collection of core plugins for [markdown-it-py](https://github.com/executablebooks/markdown-it-py).
+
+[github-ci]: https://github.com/executablebooks/mdit-py-plugins/workflows/continuous-integration/badge.svg
+[github-link]: https://github.com/executablebooks/mdit-py-plugins
+[pypi-badge]: https://img.shields.io/pypi/v/mdit-py-plugins.svg
+[pypi-link]: https://pypi.org/project/mdit-py-plugins
+[conda-badge]: https://anaconda.org/conda-forge/mdit-py-plugins/badges/version.svg
+[conda-link]: https://anaconda.org/conda-forge/mdit-py-plugins
+[codecov-badge]: https://codecov.io/gh/executablebooks/mdit-py-plugins/branch/master/graph/badge.svg
+[codecov-link]: https://codecov.io/gh/executablebooks/mdit-py-plugins
+[black-badge]: https://img.shields.io/badge/code%20style-black-000000.svg
+[black-link]: https://github.com/ambv/black
+[install-badge]: https://img.shields.io/pypi/dw/mdit-py-plugins?label=pypi%20installs
+[install-link]: https://pypistats.org/packages/mdit-py-plugins
diff --git a/codecov.yml b/codecov.yml
new file mode 100644
index 0000000..80dcc51
--- /dev/null
+++ b/codecov.yml
@@ -0,0 +1,10 @@
+coverage:
+  status:
+    project:
+      default:
+        target: 92%
+        threshold: 0.2%
+    patch:
+      default:
+        target: 80%
+        threshold: 0.2%
diff --git a/docs/conf.py b/docs/conf.py
new file mode 100644
index 0000000..2c35a4c
--- /dev/null
+++ b/docs/conf.py
@@ -0,0 +1,29 @@
+project = "mdit-py-plugins"
+copyright = "2020, Executable Book Project"
+author = "Executable Book Project"
+
+master_doc = "index"
+
+extensions = [
+    "sphinx.ext.autodoc",
+    "sphinx.ext.viewcode",
+    "sphinx.ext.intersphinx",
+    "myst_parser",
+]
+
+exclude_patterns = ["_build", "Thumbs.db", ".DS_Store"]
+
+intersphinx_mapping = {
+    "python": ("https://docs.python.org/3.8", None),
+    "markdown_it": ("https://markdown-it-py.readthedocs.io/en/latest", None),
+}
+
+html_title = "mdit-py-plugins"
+html_theme = "sphinx_book_theme"
+html_theme_options = {
+    "single_page": True,
+    "use_edit_page_button": True,
+    "repository_url": "https://github.com/executablebooks/mdit-py-plugins",
+    "repository_branch": "master",
+    "path_to_docs": "docs",
+}
diff --git a/docs/index.md b/docs/index.md
new file mode 100644
index 0000000..45ffb4c
--- /dev/null
+++ b/docs/index.md
@@ -0,0 +1,133 @@
+# Markdown-It-Py Plugin Extensions
+
+## Built-in
+
+The following plugins are embedded within the core package:
+
+- [tables](https://help.github.com/articles/organizing-information-with-tables/) (GFM)
+- [strikethrough](https://help.github.com/articles/basic-writing-and-formatting-syntax/#styling-text) (GFM)
+
+These can be enabled individually:
+
+```python
+from markdown_it import MarkdownIt
+md = MarkdownIt("commonmark").enable('table')
+```
+
+or as part of a configuration:
+
+```python
+from markdown_it import MarkdownIt
+md = MarkdownIt("gfm-like")
+```
+
+```{seealso}
+See [](markdown_it:using)
+```
+
+## mdit-py-plugins package
+
+The [`mdit_py_plugins`](https://github.com/executablebooks/mdit-py-plugins), contains a number of common plugins.
+They can be chained and loaded *via*:
+
+```python
+from markdown_it import MarkdownIt
+from mdit_py_plugins import plugin1, plugin2
+md = MarkdownIt().use(plugin1, keyword=value).use(plugin2, keyword=value)
+html_string = md.render("some *Markdown*")
+```
+
+## Front-Matter
+
+```{eval-rst}
+.. autofunction:: mdit_py_plugins.front_matter.front_matter_plugin
+```
+
+## Footnotes
+
+```{eval-rst}
+.. autofunction:: mdit_py_plugins.footnote.footnote_plugin
+```
+
+## Definition Lists
+
+```{eval-rst}
+.. autofunction:: mdit_py_plugins.deflist.deflist_plugin
+```
+
+## Task lists
+
+```{eval-rst}
+.. autofunction:: mdit_py_plugins.tasklists.tasklists_plugin
+```
+
+## Field Lists
+
+```{eval-rst}
+.. autofunction:: mdit_py_plugins.field_list.fieldlist_plugin
+```
+
+## Heading Anchors
+
+```{eval-rst}
+.. autofunction:: mdit_py_plugins.anchors.anchors_plugin
+```
+
+## Word Count
+
+```{eval-rst}
+.. autofunction:: mdit_py_plugins.wordcount.wordcount_plugin
+```
+
+## Containers
+
+```{eval-rst}
+.. autofunction:: mdit_py_plugins.container.container_plugin
+```
+
+```{eval-rst}
+.. autofunction:: mdit_py_plugins.admon.admon_plugin
+```
+
+## Inline Attributes
+
+```{eval-rst}
+.. autofunction:: mdit_py_plugins.attrs.attrs_plugin
+```
+
+## Math
+
+```{eval-rst}
+.. autofunction:: mdit_py_plugins.texmath.texmath_plugin
+```
+
+```{eval-rst}
+.. autofunction:: mdit_py_plugins.dollarmath.dollarmath_plugin
+```
+
+```{eval-rst}
+.. autofunction:: mdit_py_plugins.amsmath.amsmath_plugin
+```
+
+## MyST plugins
+
+`myst_blocks` and `myst_role` plugins are also available, for utilisation by the [MyST renderer](https://myst-parser.readthedocs.io/en/latest/using/syntax.html)
+
+```{eval-rst}
+.. autofunction:: mdit_py_plugins.myst_role.myst_role_plugin
+.. autofunction:: mdit_py_plugins.myst_blocks.myst_block_plugin
+```
+
+## Write your own
+
+Use the `mdit_py_plugins` as a guide to write your own, following the [markdown-it design principles](markdown_it:architecture).
+
+There are many other plugins which could easily be ported from the JS versions (and hopefully will):
+
+- [subscript](https://github.com/markdown-it/markdown-it-sub)
+- [superscript](https://github.com/markdown-it/markdown-it-sup)
+- [abbreviation](https://github.com/markdown-it/markdown-it-abbr)
+- [emoji](https://github.com/markdown-it/markdown-it-emoji)
+- [insert](https://github.com/markdown-it/markdown-it-ins)
+- [mark](https://github.com/markdown-it/markdown-it-mark)
+- ... and [others](https://www.npmjs.org/browse/keyword/markdown-it-plugin)
diff --git a/mdit_py_plugins/__init__.py b/mdit_py_plugins/__init__.py
new file mode 100644
index 0000000..e19434e
--- /dev/null
+++ b/mdit_py_plugins/__init__.py
@@ -0,0 +1 @@
+__version__ = "0.3.3"
diff --git a/mdit_py_plugins/admon/LICENSE b/mdit_py_plugins/admon/LICENSE
new file mode 100644
index 0000000..eb4033e
--- /dev/null
+++ b/mdit_py_plugins/admon/LICENSE
@@ -0,0 +1,24 @@
+Copyright (c) 2015 Vitaly Puzrin, Alex Kocharin.
+Copyright (c) 2018 jebbs
+Copyright (c) 2021- commenthol
+
+Permission is hereby granted, free of charge, to any person
+obtaining a copy of this software and associated documentation
+files (the "Software"), to deal in the Software without
+restriction, including without limitation the rights to use,
+copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the
+Software is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
diff --git a/mdit_py_plugins/admon/__init__.py b/mdit_py_plugins/admon/__init__.py
new file mode 100644
index 0000000..49b1c15
--- /dev/null
+++ b/mdit_py_plugins/admon/__init__.py
@@ -0,0 +1 @@
+from .index import admon_plugin  # noqa: F401
diff --git a/mdit_py_plugins/admon/index.py b/mdit_py_plugins/admon/index.py
new file mode 100644
index 0000000..8ebbe8f
--- /dev/null
+++ b/mdit_py_plugins/admon/index.py
@@ -0,0 +1,172 @@
+# Process admonitions and pass to cb.
+
+import math
+from typing import Callable, Optional, Tuple
+
+from markdown_it import MarkdownIt
+from markdown_it.rules_block import StateBlock
+
+
+def get_tag(params: str) -> Tuple[str, str]:
+    if not params.strip():
+        return "", ""
+
+    tag, *_title = params.strip().split(" ")
+    joined = " ".join(_title)
+
+    title = ""
+    if not joined:
+        title = tag.title()
+    elif joined != '""':
+        title = joined
+    return tag.lower(), title
+
+
+def validate(params: str) -> bool:
+    tag = params.strip().split(" ", 1)[-1] or ""
+    return bool(tag)
+
+
+MIN_MARKERS = 3
+MARKER_STR = "!"
+MARKER_CHAR = ord(MARKER_STR)
+MARKER_LEN = len(MARKER_STR)
+
+
+def admonition(state: StateBlock, startLine: int, endLine: int, silent: bool) -> bool:
+    start = state.bMarks[startLine] + state.tShift[startLine]
+    maximum = state.eMarks[startLine]
+
+    # Check out the first character quickly, which should filter out most of non-containers
+    if MARKER_CHAR != ord(state.src[start]):
+        return False
+
+    # Check out the rest of the marker string
+    pos = start + 1
+    while pos <= maximum and MARKER_STR[(pos - start) % MARKER_LEN] == state.src[pos]:
+        pos += 1
+
+    marker_count = math.floor((pos - start) / MARKER_LEN)
+    if marker_count < MIN_MARKERS:
+        return False
+    marker_pos = pos - ((pos - start) % MARKER_LEN)
+    params = state.src[marker_pos:maximum]
+    markup = state.src[start:marker_pos]
+
+    if not validate(params):
+        return False
+
+    # Since start is found, we can report success here in validation mode
+    if silent:
+        return True
+
+    old_parent = state.parentType
+    old_line_max = state.lineMax
+    old_indent = state.blkIndent
+
+    blk_start = pos
+    while blk_start < maximum and state.src[blk_start] == " ":
+        blk_start += 1
+
+    state.parentType = "admonition"
+    state.blkIndent += blk_start - start
+
+    was_empty = False
+
+    # Search for the end of the block
+    next_line = startLine
+    while True:
+        next_line += 1
+        if next_line >= endLine:
+            # unclosed block should be autoclosed by end of document.
+            # also block seems to be autoclosed by end of parent
+            break
+        pos = state.bMarks[next_line] + state.tShift[next_line]
+        maximum = state.eMarks[next_line]
+        is_empty = state.sCount[next_line] < state.blkIndent
+
+        # two consecutive empty lines autoclose the block
+        if is_empty and was_empty:
+            break
+        was_empty = is_empty
+
+        if pos < maximum and state.sCount[next_line] < state.blkIndent:
+            # non-empty line with negative indent should stop the block:
+            # - !!!
+            #  test
+            break
+
+    # this will prevent lazy continuations from ever going past our end marker
+    state.lineMax = next_line
+
+    tag, title = get_tag(params)
+
+    token = state.push("admonition_open", "div", 1)
+    token.markup = markup
+    token.block = True
+    token.attrs = {"class": f"admonition {tag}"}
+    token.meta = {"tag": tag}
+    token.content = title
+    token.info = params
+    token.map = [startLine, next_line]
+
+    if title:
+        title_markup = f"{markup} {tag}"
+        token = state.push("admonition_title_open", "p", 1)
+        token.markup = title_markup
+        token.attrs = {"class": "admonition-title"}
+        token.map = [startLine, startLine + 1]
+
+        token = state.push("inline", "", 0)
+        token.content = title
+        token.map = [startLine, startLine + 1]
+        token.children = []
+
+        token = state.push("admonition_title_close", "p", -1)
+        token.markup = title_markup
+
+    state.md.block.tokenize(state, startLine + 1, next_line)
+
+    token = state.push("admonition_close", "div", -1)
+    token.markup = state.src[start:pos]
+    token.block = True
+
+    state.parentType = old_parent
+    state.lineMax = old_line_max
+    state.blkIndent = old_indent
+    state.line = next_line
+
+    return True
+
+
+def admon_plugin(md: MarkdownIt, render: Optional[Callable] = None) -> None:
+    """Plugin to use
+    `python-markdown style admonitions
+    <https://python-markdown.github.io/extensions/admonition>`_.
+
+    .. code-block:: md
+
+        !!! note
+            *content*
+
+    Note, this is ported from
+    `markdown-it-admon
+    <https://github.com/commenthol/markdown-it-admon>`_.
+    """
+
+    def renderDefault(self, tokens, idx, _options, env):
+        return self.renderToken(tokens, idx, _options, env)
+
+    render = render or renderDefault
+
+    md.add_render_rule("admonition_open", render)
+    md.add_render_rule("admonition_close", render)
+    md.add_render_rule("admonition_title_open", render)
+    md.add_render_rule("admonition_title_close", render)
+
+    md.block.ruler.before(
+        "fence",
+        "admonition",
+        admonition,
+        {"alt": ["paragraph", "reference", "blockquote", "list"]},
+    )
diff --git a/mdit_py_plugins/admon/port.yaml b/mdit_py_plugins/admon/port.yaml
new file mode 100644
index 0000000..d2835bc
--- /dev/null
+++ b/mdit_py_plugins/admon/port.yaml
@@ -0,0 +1,4 @@
+- package: markdown-it-admon
+  commit: 9820ba89415c464a3cc18a780f222a0ceb3e18bd
+  date: Jul 3, 2021
+  version: 1.0.0
diff --git a/mdit_py_plugins/amsmath/__init__.py b/mdit_py_plugins/amsmath/__init__.py
new file mode 100644
index 0000000..0b367b5
--- /dev/null
+++ b/mdit_py_plugins/amsmath/__init__.py
@@ -0,0 +1,126 @@
+"""An extension to capture amsmath latex environments."""
+import re
+from typing import Callable, Optional
+
+from markdown_it import MarkdownIt
+from markdown_it.common.utils import escapeHtml
+from markdown_it.rules_block import StateBlock
+
+# Taken from amsmath version 2.1
+# http://anorien.csc.warwick.ac.uk/mirrors/CTAN/macros/latex/required/amsmath/amsldoc.pdf
+ENVIRONMENTS = [
+    # 3.2 single equation with an automatically gen-erated number
+    "equation",
+    # 3.3 variation equation, used for equations that don’t fit on a single line
+    "multline",
+    # 3.5 a group of consecutive equations when there is no alignment desired among them
+    "gather",
+    # 3.6 Used for two or more equations when vertical alignment is desired
+    "align",
+    # allows the horizontal space between equationsto be explicitly specified.
+    "alignat",
+    # stretches the space betweenthe equation columns to the maximum possible width
+    "flalign",
+    # 4.1 The pmatrix, bmatrix, Bmatrix, vmatrix and Vmatrix have (respectively)
+    # (),[],{},||,and ‖‖ delimiters built in.
+    "matrix",
+    "pmatrix",
+    "bmatrix",
+    "Bmatrix",
+    "vmatrix",
+    "Vmatrix",
+    # eqnarray is another math environment, it is not part of amsmath,
+    # and note that it is better to use align or equation+split instead
+    "eqnarray",
+]
+# other "non-top-level" environments:
+
+# 3.4 the split environment is for single equations that are too long to fit on one line
+# and hence must be split into multiple lines,
+# it is intended for use only inside some other displayed equation structure,
+# usually an equation, align, or gather environment
+
+# 3.7 variants gathered, aligned,and alignedat are provided
+# whose total width is the actual width of the contents;
+# thus they can be used as a component in a containing expression
+
+RE_OPEN = re.compile(r"\\begin\{(" + "|".join(ENVIRONMENTS) + r")([\*]?)\}")
+
+
+def amsmath_plugin(md: MarkdownIt, *, renderer: Optional[Callable[[str], str]] = None):
+    """Parses TeX math equations, without any surrounding delimiters,
+    only for top-level `amsmath <https://ctan.org/pkg/amsmath>`__ environments:
+
+    .. code-block:: latex
+
+        \\begin{gather*}
+        a_1=b_1+c_1\\\\
+        a_2=b_2+c_2-d_2+e_2
+        \\end{gather*}
+
+    :param renderer: Function to render content, by default escapes HTML
+
+    """
+    md.block.ruler.before(
+        "blockquote",
+        "amsmath",
+        amsmath_block,
+        {"alt": ["paragraph", "reference", "blockquote", "list", "footnote_def"]},
+    )
+
+    if renderer is None:
+        _renderer = lambda content: escapeHtml(content)
+    else:
+        _renderer = renderer
+
+    def render_amsmath_block(self, tokens, idx, options, env):
+        content = _renderer(str(tokens[idx].content))
+        return f'<div class="math amsmath">\n{content}\n</div>\n'
+
+    md.add_render_rule("amsmath", render_amsmath_block)
+
+
+def match_environment(string):
+    match_open = RE_OPEN.match(string)
+    if not match_open:
+        return None
+    environment = match_open.group(1)
+    numbered = match_open.group(2)
+    match_close = re.search(
+        r"\\end\{" + environment + numbered.replace("*", r"\*") + "\\}", string
+    )
+    if not match_close:
+        return None
+    return (environment, numbered, match_close.end())
+
+
+def amsmath_block(state: StateBlock, startLine: int, endLine: int, silent: bool):
+
+    # if it's indented more than 3 spaces, it should be a code block
+    if state.sCount[startLine] - state.blkIndent >= 4:
+        return False
+
+    begin = state.bMarks[startLine] + state.tShift[startLine]
+
+    outcome = match_environment(state.src[begin:])
+    if not outcome:
+        return False
+    environment, numbered, endpos = outcome
+    endpos += begin
+
+    line = startLine
+    while line < endLine:
+        if endpos >= state.bMarks[line] and endpos <= state.eMarks[line]:
+            # line for end of block math found ...
+            state.line = line + 1
+            break
+        line += 1
+
+    if not silent:
+        token = state.push("amsmath", "math", 0)
+        token.block = True
+        token.content = state.src[begin:endpos]
+        token.meta = {"environment": environment, "numbered": numbered}
+        token.map = [startLine, line]
+
+    return True
diff --git a/mdit_py_plugins/anchors/__init__.py b/mdit_py_plugins/anchors/__init__.py
new file mode 100644
index 0000000..d9c4f05
--- /dev/null
+++ b/mdit_py_plugins/anchors/__init__.py
@@ -0,0 +1 @@
+from .index import anchors_plugin  # noqa F401
diff --git a/mdit_py_plugins/anchors/index.py b/mdit_py_plugins/anchors/index.py
new file mode 100644
index 0000000..abbd48a
--- /dev/null
+++ b/mdit_py_plugins/anchors/index.py
@@ -0,0 +1,129 @@
+import re
+from typing import Callable, List, Optional, Set
+
+from markdown_it import MarkdownIt
+from markdown_it.rules_core import StateCore
+from markdown_it.token import Token
+
+
+def anchors_plugin(
+    md: MarkdownIt,
+    min_level: int = 1,
+    max_level: int = 2,
+    slug_func: Optional[Callable[[str], str]] = None,
+    permalink: bool = False,
+    permalinkSymbol: str = "¶",
+    permalinkBefore: bool = False,
+    permalinkSpace: bool = True,
+):
+    """Plugin for adding header anchors, based on
+    `markdown-it-anchor <https://github.com/valeriangalliat/markdown-it-anchor>`__
+
+    .. code-block:: md
+
+        # Title String
+
+    renders as:
+
+    .. code-block:: html
+
+        <h1 id="title-string">Title String <a class="header-anchor" href="#title-string">¶</a></h1>
+
+    :param min_level: minimum header level to apply anchors
+    :param max_level: maximum header level to apply anchors
+    :param slug_func: function to convert title text to id slug.
+    :param permalink: Add a permalink next to the title
+    :param permalinkSymbol: the symbol to show
+    :param permalinkBefore: Add the permalink before the title, otherwise after
+    :param permalinkSpace: Add a space between the permalink and the title
+
+    Note, the default slug function aims to mimic the GitHub Markdown format, see:
+
+    - https://github.com/jch/html-pipeline/blob/master/lib/html/pipeline/toc_filter.rb
+    - https://gist.github.com/asabaylus/3071099
+
+    """
+    selected_levels = list(range(min_level, max_level + 1))
+    md.core.ruler.push(
+        "anchor",
+        _make_anchors_func(
+            selected_levels,
+            slug_func or slugify,
+            permalink,
+            permalinkSymbol,
+            permalinkBefore,
+            permalinkSpace,
+        ),
+    )
+
+
+def _make_anchors_func(
+    selected_levels: List[int],
+    slug_func: Callable[[str], str],
+    permalink: bool,
+    permalinkSymbol: str,
+    permalinkBefore: bool,
+    permalinkSpace: bool,
+):
+    def _anchor_func(state: StateCore):
+        slugs: Set[str] = set()
+        for (idx, token) in enumerate(state.tokens):
+            if token.type != "heading_open":
+                continue
+            level = int(token.tag[1])
+            if level not in selected_levels:
+                continue
+            inline_token = state.tokens[idx + 1]
+            assert inline_token.children is not None
+            title = "".join(
+                child.content
+                for child in inline_token.children
+                if child.type in ["text", "code_inline"]
+            )
+            slug = unique_slug(slug_func(title), slugs)
+            token.attrSet("id", slug)
+
+            if permalink:
+                link_open = Token(
+                    "link_open",
+                    "a",
+                    1,
+                )
+                link_open.attrSet("class", "header-anchor")
+                link_open.attrSet("href", f"#{slug}")
+                link_tokens = [
+                    link_open,
+                    Token("html_block", "", 0, content=permalinkSymbol),
+                    Token("link_close", "a", -1),
+                ]
+                if permalinkBefore:
+                    inline_token.children = (
+                        link_tokens
+                        + (
+                            [Token("text", "", 0, content=" ")]
+                            if permalinkSpace
+                            else []
+                        )
+                        + inline_token.children
+                    )
+                else:
+                    inline_token.children.extend(
+                        ([Token("text", "", 0, content=" ")] if permalinkSpace else [])
+                        + link_tokens
+                    )
+
+    return _anchor_func
+
+
+def slugify(title: str):
+    return re.sub(r"[^\w\u4e00-\u9fff\- ]", "", title.strip().lower().replace(" ", "-"))
+
+
+def unique_slug(slug: str, slugs: set):
+    uniq = slug
+    i = 1
+    while uniq in slugs:
+        uniq = f"{slug}-{i}"
+        i += 1
+    slugs.add(uniq)
+    return uniq
diff --git a/mdit_py_plugins/attrs/__init__.py b/mdit_py_plugins/attrs/__init__.py
new file mode 100644
index 0000000..9359cf8
--- /dev/null
+++ b/mdit_py_plugins/attrs/__init__.py
@@ -0,0 +1 @@
+from .index import attrs_plugin  # noqa: F401
diff --git a/mdit_py_plugins/attrs/index.py b/mdit_py_plugins/attrs/index.py
new file mode 100644
index 0000000..1adea3f
--- /dev/null
+++ b/mdit_py_plugins/attrs/index.py
@@ -0,0 +1,123 @@
+from typing import List, Optional
+
+from markdown_it import MarkdownIt
+from markdown_it.rules_inline import StateInline
+from markdown_it.token import Token
+
+from .parse import ParseError, parse
+
+
+def attrs_plugin(
+    md: MarkdownIt,
+    *,
+    after=("image", "code_inline", "link_close", "span_close"),
+    spans=False,
+    span_after="link",
+):
+    """Parse inline attributes that immediately follow certain inline elements::
+
+        ![alt](https://image.com){#id .a b=c}
+
+    This syntax is inspired by
+    `Djot spans
+    <https://htmlpreview.github.io/?https://github.com/jgm/djot/blob/master/doc/syntax.html#inline-attributes>`_.
+
+    Inside the curly braces, the following syntax is possible:
+
+    - `.foo` specifies foo as a class.
+      Multiple classes may be given in this way; they will be combined.
+    - `#foo` specifies foo as an identifier.
+      An element may have only one identifier;
+      if multiple identifiers are given, the last one is used.
+    - `key="value"` or `key=value` specifies a key-value attribute.
+       Quotes are not needed when the value consists entirely of
+       ASCII alphanumeric characters or `_` or `:` or `-`.
+       Backslash escapes may be used inside quoted values.
+    - `%` begins a comment, which ends with the next `%` or the end of the attribute (`}`).
+
+    Multiple attribute blocks are merged.
+
+    :param md: The MarkdownIt instance to modify.
+    :param after: The names of inline elements after which attributes may be specified.
+        This plugin does not support attributes after emphasis, strikethrough or text elements,
+        which all require post-parse processing.
+    :param spans: If True, also parse attributes after spans of text, encapsulated by `[]`.
+        Note Markdown link references take precedence over this syntax.
+    :param span_after: The name of an inline rule after which spans may be specified.
+    """
+
+    def _attr_rule(state: StateInline, silent: bool):
+        if state.pending or not state.tokens:
+            return False
+        token = state.tokens[-1]
+        if token.type not in after:
+            return False
+        try:
+            new_pos, attrs = parse(state.src[state.pos :])
+        except ParseError:
+            return False
+        token_index = _find_opening(state.tokens, len(state.tokens) - 1)
+        if token_index is None:
+            return False
+        state.pos += new_pos + 1
+        if not silent:
+            attr_token = state.tokens[token_index]
+            if "class" in attrs and "class" in token.attrs:
+                attrs["class"] = f"{attr_token.attrs['class']} {attrs['class']}"
+            attr_token.attrs.update(attrs)
+        return True
+
+    if spans:
+        md.inline.ruler.after(span_after, "span", _span_rule)
+    md.inline.ruler.push("attr", _attr_rule)
+
+
+def _find_opening(tokens: List[Token], index: int) -> Optional[int]:
+    """Find the opening token index, if the token is closing."""
+    if tokens[index].nesting != -1:
+        return index
+    level = 0
+    while index >= 0:
+        level += tokens[index].nesting
+        if level == 0:
+            return index
+        index -= 1
+    return None
+
+
+def _span_rule(state: StateInline, silent: bool):
+    if state.srcCharCode[state.pos] != 0x5B:  # /* [ */
+        return False
+
+    maximum = state.posMax
+    labelStart = state.pos + 1
+    labelEnd = state.md.helpers.parseLinkLabel(state, state.pos, False)
+
+    # parser failed to find ']', so it's not a valid span
+    if labelEnd < 0:
+        return False
+
+    pos = labelEnd + 1
+
+    # check not at end of inline
+    if pos >= maximum:
+        return False
+
+    try:
+        new_pos, attrs = parse(state.src[pos:])
+    except ParseError:
+        return False
+
+    pos += new_pos + 1
+
+    if not silent:
+        state.pos = labelStart
+        state.posMax = labelEnd
+        token = state.push("span_open", "span", 1)
+        token.attrs = attrs
+        state.md.inline.tokenize(state)
+        token = state.push("span_close", "span", -1)
+
+    state.pos = pos
+    state.posMax = maximum
+    return True
diff --git a/mdit_py_plugins/attrs/parse.py b/mdit_py_plugins/attrs/parse.py
new file mode 100644
index 0000000..4a30353
--- /dev/null
+++ b/mdit_py_plugins/attrs/parse.py
@@ -0,0 +1,265 @@
+"""Parser for attributes::
+
+    attributes { id = "foo", class = "bar baz",
+                key1 = "val1", key2 = "val2" }
+
+Adapted from:
+https://github.com/jgm/djot/blob/fae7364b86bfce69bc6d5b5eede1f5196d845fd6/djot/attributes.lua#L1
+
+syntax:
+
+attributes <- '{' whitespace* attribute (whitespace attribute)* whitespace* '}'
+attribute <- identifier | class | keyval
+identifier <- '#' name
+class <- '.' name
+name <- (nonspace, nonpunctuation other than ':', '_', '-')+
+keyval <- key '=' val
+key <- (ASCII_ALPHANUM | ':' | '_' | '-')+
+val <- bareval | quotedval
+bareval <- (ASCII_ALPHANUM | ':' | '_' | '-')+
+quotedval <- '"' ([^"] | '\"') '"'
+"""
+from __future__ import annotations
+
+from enum import Enum
+import re
+from typing import Callable
+
+
+class State(Enum):
+    START = 0
+    SCANNING = 1
+    SCANNING_ID = 2
+    SCANNING_CLASS = 3
+    SCANNING_KEY = 4
+    SCANNING_VALUE = 5
+    SCANNING_BARE_VALUE = 6
+    SCANNING_QUOTED_VALUE = 7
+    SCANNING_COMMENT = 8
+    SCANNING_ESCAPED = 9
+    DONE = 10
+
+
+REGEX_SPACE = re.compile(r"\s")
+REGEX_SPACE_PUNCTUATION = re.compile(r"[\s!\"#$%&'()*+,./;<=>?@[\]^`{|}~]")
+REGEX_KEY_CHARACTERS = re.compile(r"[a-zA-Z\d_:-]")
+
+
+class TokenState:
+    def __init__(self):
+        self._tokens = []
+        self.start: int = 0
+
+    def set_start(self, start: int) -> None:
+        self.start = start
+
+    def append(self, start: int, end: int, ttype: str):
+        self._tokens.append((start, end, ttype))
+
+    def compile(self, string: str) -> dict[str, str]:
+        """compile the tokens into a dictionary"""
+        attributes = {}
+        classes = []
+        idx = 0
+        while idx < len(self._tokens):
+            start, end, ttype = self._tokens[idx]
+            if ttype == "id":
+                attributes["id"] = string[start:end]
+            elif ttype == "class":
+                classes.append(string[start:end])
+            elif ttype == "key":
+                key = string[start:end]
+                if idx + 1 < len(self._tokens):
+                    start, end, ttype = self._tokens[idx + 1]
+                    if ttype == "value":
+                        if key == "class":
+                            classes.append(string[start:end])
+                        else:
+                            attributes[key] = string[start:end]
+                        idx += 1
+            idx += 1
+        if classes:
+            attributes["class"] = " ".join(classes)
+        return attributes
+
+    def __str__(self) -> str:
+        return str(self._tokens)
+
+    def __repr__(self) -> str:
+        return repr(self._tokens)
+
+
+class ParseError(Exception):
+    def __init__(self, msg: str, pos: int) -> None:
+        self.pos = pos
+        super().__init__(msg + f" at position {pos}")
+
+
+def parse(string: str) -> tuple[int, dict[str, str]]:
+    """Parse attributes from start of string.
+
+    :returns: (length of parsed string, dict of attributes)
+    """
+    pos = 0
+    state: State = State.START
+    tokens = TokenState()
+    while pos < len(string):
+        state = HANDLERS[state](string[pos], pos, tokens)
+        if state == State.DONE:
+            return pos, tokens.compile(string)
+        pos = pos + 1
+
+    return pos, tokens.compile(string)
+
+
+def handle_start(char: str, pos: int, tokens: TokenState) -> State:
+
+    if char == "{":
+        return State.SCANNING
+    raise ParseError("Attributes must start with '{'", pos)
+
+
+def handle_scanning(char: str, pos: int, tokens: TokenState) -> State:
+
+    if char == " " or char == "\t" or char == "\n" or char == "\r":
+        return State.SCANNING
+    if char == "}":
+        return State.DONE
+    if char == "#":
+        tokens.set_start(pos)
+        return State.SCANNING_ID
+    if char == "%":
+        tokens.set_start(pos)
+        return State.SCANNING_COMMENT
+    if char == ".":
+        tokens.set_start(pos)
+        return State.SCANNING_CLASS
+    if REGEX_KEY_CHARACTERS.fullmatch(char):
+        tokens.set_start(pos)
+        return State.SCANNING_KEY
+
+    raise ParseError(f"Unexpected character whilst scanning: {char}", pos)
+
+
+def handle_scanning_comment(char: str, pos: int, tokens: TokenState) -> State:
+
+    if char == "%":
+        return State.SCANNING
+
+    return State.SCANNING_COMMENT
+
+
+def handle_scanning_id(char: str, pos: int, tokens: TokenState) -> State:
+
+    if not REGEX_SPACE_PUNCTUATION.fullmatch(char):
+        return State.SCANNING_ID
+
+    if char == "}":
+        if (pos - 1) > tokens.start:
+            tokens.append(tokens.start + 1, pos, "id")
+        return State.DONE
+
+    if REGEX_SPACE.fullmatch(char):
+        if (pos - 1) > tokens.start:
+            tokens.append(tokens.start + 1, pos, "id")
+        return State.SCANNING
+
+    raise ParseError(f"Unexpected character whilst scanning id: {char}", pos)
+
+
+def handle_scanning_class(char: str, pos: int, tokens: TokenState) -> State:
+
+    if not REGEX_SPACE_PUNCTUATION.fullmatch(char):
+        return State.SCANNING_CLASS
+
+    if char == "}":
+        if (pos - 1) > tokens.start:
+            tokens.append(tokens.start + 1, pos, "class")
+        return State.DONE
+
+    if REGEX_SPACE.fullmatch(char):
+        if (pos - 1) > tokens.start:
+            tokens.append(tokens.start + 1, pos, "class")
+        return State.SCANNING
+
+    raise ParseError(f"Unexpected character whilst scanning class: {char}", pos)
+
+
+def handle_scanning_key(char: str, pos: int, tokens: TokenState) -> State:
+
+    if char == "=":
+        tokens.append(tokens.start, pos, "key")
+        return State.SCANNING_VALUE
+
+    if REGEX_KEY_CHARACTERS.fullmatch(char):
+        return State.SCANNING_KEY
+
+    raise ParseError(f"Unexpected character whilst scanning key: {char}", pos)
+
+
+def handle_scanning_value(char: str, pos: int, tokens: TokenState) -> State:
+
+    if char == '"':
+        tokens.set_start(pos)
+        return State.SCANNING_QUOTED_VALUE
+
+    if REGEX_KEY_CHARACTERS.fullmatch(char):
+        tokens.set_start(pos)
+        return State.SCANNING_BARE_VALUE
+
+    raise ParseError(f"Unexpected character whilst scanning value: {char}", pos)
+
+
+def handle_scanning_bare_value(char: str, pos: int, tokens: TokenState) -> State:
+
+    if REGEX_KEY_CHARACTERS.fullmatch(char):
+        return State.SCANNING_BARE_VALUE
+
+    if char == "}":
+        tokens.append(tokens.start, pos, "value")
+        return State.DONE
+
+    if REGEX_SPACE.fullmatch(char):
+        tokens.append(tokens.start, pos, "value")
+        return State.SCANNING
+
+    raise ParseError(f"Unexpected character whilst scanning bare value: {char}", pos)
+
+
+def handle_scanning_escaped(char: str, pos: int, tokens: TokenState) -> State:
+    return State.SCANNING_QUOTED_VALUE
+
+
+def handle_scanning_quoted_value(char: str, pos: int, tokens: TokenState) -> State:
+
+    if char == '"':
+        tokens.append(tokens.start + 1, pos, "value")
+        return State.SCANNING
+
+    if char == "\\":
+        return State.SCANNING_ESCAPED
+
+    if char == "{" or char == "}":
+        raise ParseError(
+            f"Unexpected character whilst scanning quoted value: {char}", pos
+        )
+
+    if char == "\n":
+        tokens.append(tokens.start + 1, pos, "value")
+        return State.SCANNING_QUOTED_VALUE
+
+    return State.SCANNING_QUOTED_VALUE
+
+
+HANDLERS: dict[State, Callable[[str, int, TokenState], State]] = {
+    State.START: handle_start,
+    State.SCANNING: handle_scanning,
+    State.SCANNING_COMMENT: handle_scanning_comment,
+    State.SCANNING_ID: handle_scanning_id,
+    State.SCANNING_CLASS: handle_scanning_class,
+    State.SCANNING_KEY: handle_scanning_key,
+    State.SCANNING_VALUE: handle_scanning_value,
+    State.SCANNING_BARE_VALUE: handle_scanning_bare_value,
+    State.SCANNING_QUOTED_VALUE: handle_scanning_quoted_value,
+    State.SCANNING_ESCAPED: handle_scanning_escaped,
+}
diff --git a/mdit_py_plugins/colon_fence.py b/mdit_py_plugins/colon_fence.py
new file mode 100644
index 0000000..e2356ed
--- /dev/null
+++ b/mdit_py_plugins/colon_fence.py
@@ -0,0 +1,132 @@
+from markdown_it import MarkdownIt
+from markdown_it.common.utils import escapeHtml, unescapeAll
+from markdown_it.rules_block import StateBlock
+
+
+def colon_fence_plugin(md: MarkdownIt):
+    """This plugin directly mimics regular fences, but with `:` colons.
+
+    Example::
+
+        :::name
+        contained text
+        :::
+
+    """
+
+    md.block.ruler.before(
+        "fence",
+        "colon_fence",
+        _rule,
+        {"alt": ["paragraph", "reference", "blockquote", "list", "footnote_def"]},
+    )
+    md.add_render_rule("colon_fence", _render)
+
+
+def _rule(state: StateBlock, startLine: int, endLine: int, silent: bool):
+
+    haveEndMarker = False
+    pos = state.bMarks[startLine] + state.tShift[startLine]
+    maximum = state.eMarks[startLine]
+
+    # if it's indented more than 3 spaces, it should be a code block
+    if state.sCount[startLine] - state.blkIndent >= 4:
+        return False
+
+    if pos + 3 > maximum:
+        return False
+
+    marker = state.srcCharCode[pos]
+
+    # /* : */
+    if marker != 0x3A:
+        return False
+
+    # scan marker length
+    mem = pos
+    pos = state.skipChars(pos, marker)
+
+    length = pos - mem
+
+    if length < 3:
+        return False
+
+    markup = state.src[mem:pos]
+    params = state.src[pos:maximum]
+
+    # Since start is found, we can report success here in validation mode
+    if silent:
+        return True
+
+    # search end of block
+    nextLine = startLine
+
+    while True:
+        nextLine += 1
+        if nextLine >= endLine:
+            # unclosed block should be autoclosed by end of document.
+            # also block seems to be autoclosed by end of parent
+            break
+
+        pos = mem = state.bMarks[nextLine] + state.tShift[nextLine]
+        maximum = state.eMarks[nextLine]
+
+        if pos < maximum and state.sCount[nextLine] < state.blkIndent:
+            # non-empty line with negative indent should stop the list:
+            # - ```
+            #  test
+            break
+
+        if state.srcCharCode[pos] != marker:
+            continue
+
+        if state.sCount[nextLine] - state.blkIndent >= 4:
+            # closing fence should be indented less than 4 spaces
+            continue
+
+        pos = state.skipChars(pos, marker)
+
+        # closing code fence must be at least as long as the opening one
+        if pos - mem < length:
+            continue
+
+        # make sure tail has spaces only
+        pos = state.skipSpaces(pos)
+
+        if pos < maximum:
+            continue
+
+        haveEndMarker = True
+        # found!
+        break
+
+    # If a fence has heading spaces, they should be removed from its inner block
+    length = state.sCount[startLine]
+
+    state.line = nextLine + (1 if haveEndMarker else 0)
+
+    token = state.push("colon_fence", "code", 0)
+    token.info = params
+    token.content = state.getLines(startLine + 1, nextLine, length, True)
+    token.markup = markup
+    token.map = [startLine, state.line]
+
+    return True
+
+
+def _render(self, tokens, idx, options, env):
+    token = tokens[idx]
+    info = unescapeAll(token.info).strip() if token.info else ""
+    content = escapeHtml(token.content)
+    block_name = ""
+
+    if info:
+        block_name = info.split()[0]
+
+    return (
+        "<pre><code"
+        + (f' class="block-{block_name}" ' if block_name else "")
+        + ">"
+        + content
+        + "</code></pre>\n"
+    )
diff --git a/mdit_py_plugins/container/LICENSE b/mdit_py_plugins/container/LICENSE
new file mode 100644
index 0000000..e6c3230
--- /dev/null
+++ b/mdit_py_plugins/container/LICENSE
@@ -0,0 +1,22 @@
+Copyright (c) 2015 Vitaly Puzrin, Alex Kocharin.
+
+Permission is hereby granted, free of charge, to any person
+obtaining a copy of this software and associated documentation
+files (the "Software"), to deal in the Software without
+restriction, including without limitation the rights to use,
+copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the
+Software is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
diff --git a/mdit_py_plugins/container/README.md b/mdit_py_plugins/container/README.md
new file mode 100644
index 0000000..03868d7
--- /dev/null
+++ b/mdit_py_plugins/container/README.md
@@ -0,0 +1,95 @@
+# markdown-it-container
+
+[![Build Status](https://img.shields.io/travis/markdown-it/markdown-it-container/master.svg?style=flat)](https://travis-ci.org/markdown-it/markdown-it-container)
+[![NPM version](https://img.shields.io/npm/v/markdown-it-container.svg?style=flat)](https://www.npmjs.org/package/markdown-it-container)
+[![Coverage Status](https://img.shields.io/coveralls/markdown-it/markdown-it-container/master.svg?style=flat)](https://coveralls.io/r/markdown-it/markdown-it-container?branch=master)
+
+> Plugin for creating block-level custom containers for [markdown-it](https://github.com/markdown-it/markdown-it) markdown parser.
+
+__v2.+ requires `markdown-it` v5.+, see changelog.__
+
+With this plugin you can create block containers like:
+
+```
+::: warning
+*here be dragons*
+:::
+```
+
+.... and specify how they should be rendered. If no renderer defined, `<div>` with
+container name class will be created:
+
+```html
+<div class="warning">
+<em>here be dragons</em>
+</div>
+```
+
+Markup is the same as for [fenced code blocks](http://spec.commonmark.org/0.18/#fenced-code-blocks).
+Difference is, that marker use another character and content is rendered as markdown markup.
+
+
+## Installation
+
+node.js, browser:
+
+```bash
+$ npm install markdown-it-container --save
+$ bower install markdown-it-container --save
+```
+
+
+## API
+
+```js
+var md = require('markdown-it')()
+            .use(require('markdown-it-container'), name [, options]);
+```
+
+Params:
+
+- __name__ - container name (mandatory)
+- __options:__
+   - __validate__ - optional, function to validate tail after opening marker, should
+     return `true` on success.
+   - __render__ - optional, renderer function for opening/closing tokens.
+   - __marker__ - optional (`:`), character to use in delimiter.
+
+
+## Example
+
+```js
+var md = require('markdown-it')();
+
+md.use(require('markdown-it-container'), 'spoiler', {
+
+  validate: function(params) {
+    return params.trim().match(/^spoiler\s+(.*)$/);
+  },
+
+  render: function (tokens, idx) {
+    var m = tokens[idx].info.trim().match(/^spoiler\s+(.*)$/);
+
+    if (tokens[idx].nesting === 1) {
+      // opening tag
+      return '<details><summary>' + md.utils.escapeHtml(m[1]) + '</summary>\n';
+
+    } else {
+      // closing tag
+      return '</details>\n';
+    }
+  }
+});
+
+console.log(md.render('::: spoiler click me\n*content*\n:::\n'));
+
+// Output:
+//
+// <details><summary>click me</summary>
+// <p><em>content</em></p>
+// </details>
+```
+
+## License
+
+[MIT](https://github.com/markdown-it/markdown-it-container/blob/master/LICENSE)
diff --git a/mdit_py_plugins/container/__init__.py b/mdit_py_plugins/container/__init__.py
new file mode 100644
index 0000000..7a89c81
--- /dev/null
+++ b/mdit_py_plugins/container/__init__.py
@@ -0,0 +1 @@
+from .index import container_plugin  # noqa F401
diff --git a/mdit_py_plugins/container/index.py b/mdit_py_plugins/container/index.py
new file mode 100644
index 0000000..b6edd43
--- /dev/null
+++ b/mdit_py_plugins/container/index.py
@@ -0,0 +1,174 @@
+"""Process block-level custom containers."""
+from math import floor
+from typing import Callable, Optional
+
+from markdown_it import MarkdownIt
+from markdown_it.common.utils import charCodeAt
+from markdown_it.rules_block import StateBlock
+
+
+def container_plugin(
+    md: MarkdownIt,
+    name: str,
+    marker: str = ":",
+    validate: Optional[Callable[[str, str], bool]] = None,
+    render=None,
+):
+    """Plugin ported from
+    `markdown-it-container <https://github.com/markdown-it/markdown-it-container>`__.
+
+    It is a plugin for creating block-level custom containers:
+
+    .. code-block:: md
+
+        :::: name
+        ::: name
+        *markdown*
+        :::
+        ::::
+
+    :param name: the name of the container to parse
+    :param marker: the marker character to use
+    :param validate: func(marker, param) -> bool, default matches against the name
+    :param render: render func
+
+    """
+
+    def validateDefault(params: str, *args):
+        return params.strip().split(" ", 2)[0] == name
+
+    def renderDefault(self, tokens, idx, _options, env):
+        # add a class to the opening tag
+        if tokens[idx].nesting == 1:
+            tokens[idx].attrJoin("class", name)
+
+        return self.renderToken(tokens, idx, _options, env)
+
+    min_markers = 3
+    marker_str = marker
+    marker_char = charCodeAt(marker_str, 0)
+    marker_len = len(marker_str)
+    validate = validate or validateDefault
+    render = render or renderDefault
+
+    def container_func(state: StateBlock, startLine: int, endLine: int, silent: bool):
+
+        auto_closed = False
+        start = state.bMarks[startLine] + state.tShift[startLine]
+        maximum = state.eMarks[startLine]
+
+        # Check out the first character quickly,
+        # this should filter out most of non-containers
+        if marker_char != state.srcCharCode[start]:
+            return False
+
+        # Check out the rest of the marker string
+        pos = start + 1
+        while pos <= maximum:
+            try:
+                character = state.src[pos]
+            except IndexError:
+                break
+            if marker_str[(pos - start) % marker_len] != character:
+                break
+            pos += 1
+
+        marker_count = floor((pos - start) / marker_len)
+        if marker_count < min_markers:
+            return False
+        pos -= (pos - start) % marker_len
+
+        markup = state.src[start:pos]
+        params = state.src[pos:maximum]
+        assert validate is not None
+        if not validate(params, markup):
+            return False
+
+        # Since start is found, we can report success here in validation mode
+        if silent:
+            return True
+
+        # Search for the end of the block
+        nextLine = startLine
+
+        while True:
+            nextLine += 1
+            if nextLine >= endLine:
+                # unclosed block should be autoclosed by end of document.
+                # also block seems to be autoclosed by end of parent
+                break
+
+            start = state.bMarks[nextLine] + state.tShift[nextLine]
+            maximum = state.eMarks[nextLine]
+
+            if start < maximum and state.sCount[nextLine] < state.blkIndent:
+                # non-empty line with negative indent should stop the list:
+                # - ```
+                #  test
+                break
+
+            if marker_char != state.srcCharCode[start]:
+                continue
+
+            if state.sCount[nextLine] - state.blkIndent >= 4:
+                # closing fence should be indented less than 4 spaces
+                continue
+
+            pos = start + 1
+            while pos <= maximum:
+                try:
+                    character = state.src[pos]
+                except IndexError:
+                    break
+                if marker_str[(pos - start) % marker_len] != character:
+                    break
+                pos += 1
+
+            # closing code fence must be at least as long as the opening one
+            if floor((pos - start) / marker_len) < marker_count:
+                continue
+
+            # make sure tail has spaces only
+            pos -= (pos - start) % marker_len
+            pos = state.skipSpaces(pos)
+
+            if pos < maximum:
+                continue
+
+            # found!
+            auto_closed = True
+            break
+
+        old_parent = state.parentType
+        old_line_max = state.lineMax
+        state.parentType = "container"
+
+        # this will prevent lazy continuations from ever going past our end marker
+        state.lineMax = nextLine
+
+        token = state.push(f"container_{name}_open", "div", 1)
+        token.markup = markup
+        token.block = True
+        token.info = params
+        token.map = [startLine, nextLine]
+
+        state.md.block.tokenize(state, startLine + 1, nextLine)
+
+        token = state.push(f"container_{name}_close", "div", -1)
+        token.markup = state.src[start:pos]
+        token.block = True
+
+        state.parentType = old_parent
+        state.lineMax = old_line_max
+        state.line = nextLine + (1 if auto_closed else 0)
+
+        return True
+
+    md.block.ruler.before(
+        "fence",
+        "container_" + name,
+        container_func,
+        {"alt": ["paragraph", "reference", "blockquote", "list"]},
+    )
+    md.add_render_rule(f"container_{name}_open", render)
+    md.add_render_rule(f"container_{name}_close", render)
diff --git a/mdit_py_plugins/container/port.yaml b/mdit_py_plugins/container/port.yaml
new file mode 100644
index 0000000..e47c118
--- /dev/null
+++ b/mdit_py_plugins/container/port.yaml
@@ -0,0 +1,5 @@
+- package: markdown-it-container
+  commit: adb3defde3a1c56015895b47ce4c6591b8b1e3a2
+  date: Jun 2, 2020
+  version: 3.0.0
+  changes:
diff --git a/mdit_py_plugins/deflist/LICENSE b/mdit_py_plugins/deflist/LICENSE
new file mode 100644
index 0000000..2fd4e3d
--- /dev/null
+++ b/mdit_py_plugins/deflist/LICENSE
@@ -0,0 +1,22 @@
+Copyright (c) 2014-2015 Vitaly Puzrin, Alex Kocharin.
+
+Permission is hereby granted, free of charge, to any person
+obtaining a copy of this software and associated documentation
+files (the "Software"), to deal in the Software without
+restriction, including without limitation the rights to use,
+copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the
+Software is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
diff --git a/mdit_py_plugins/deflist/README.md b/mdit_py_plugins/deflist/README.md
new file mode 100644
index 0000000..414157b
--- /dev/null
+++ b/mdit_py_plugins/deflist/README.md
@@ -0,0 +1,38 @@
+# markdown-it-deflist
+
+[![Build Status](https://img.shields.io/travis/markdown-it/markdown-it-deflist/master.svg?style=flat)](https://travis-ci.org/markdown-it/markdown-it-deflist)
+[![NPM version](https://img.shields.io/npm/v/markdown-it-deflist.svg?style=flat)](https://www.npmjs.org/package/markdown-it-deflist)
+[![Coverage Status](https://img.shields.io/coveralls/markdown-it/markdown-it-deflist/master.svg?style=flat)](https://coveralls.io/r/markdown-it/markdown-it-deflist?branch=master)
+
+> Definition list (`<dl>`) tag plugin for [markdown-it](https://github.com/markdown-it/markdown-it) markdown parser.
+
+__v2.+ requires `markdown-it` v5.+, see changelog.__
+
+Syntax is based on [pandoc definition lists](http://johnmacfarlane.net/pandoc/README.html#definition-lists).
+
+
+## Install
+
+node.js, browser:
+
+```bash
+npm install markdown-it-deflist --save
+bower install markdown-it-deflist --save
+```
+
+## Use
+
+```js
+var md = require('markdown-it')()
+            .use(require('markdown-it-deflist'));
+
+md.render(/*...*/);
+```
+
+_Differences in browser._ If you load script directly into the page, without
+package system, module will add itself globally as `window.markdownitDeflist`.
+
+
+## License
+
+[MIT](https://github.com/markdown-it/markdown-it-deflist/blob/master/LICENSE)
diff --git a/mdit_py_plugins/deflist/__init__.py b/mdit_py_plugins/deflist/__init__.py
new file mode 100644
index 0000000..fbd9b0e
--- /dev/null
+++ b/mdit_py_plugins/deflist/__init__.py
@@ -0,0 +1 @@
+from .index import deflist_plugin  # noqa F401
diff --git a/mdit_py_plugins/deflist/index.py b/mdit_py_plugins/deflist/index.py
new file mode 100644
index 0000000..0b353db
--- /dev/null
+++ b/mdit_py_plugins/deflist/index.py
@@ -0,0 +1,253 @@
+"""Process definition lists."""
+from markdown_it import MarkdownIt
+from markdown_it.rules_block import StateBlock
+
+
+def deflist_plugin(md: MarkdownIt):
+    """Plugin ported from
+    `markdown-it-deflist <https://github.com/markdown-it/markdown-it-deflist>`__.
+
+    The syntax is based on
+    `pandoc definition lists <http://johnmacfarlane.net/pandoc/README.html#definition-lists>`__:
+
+    .. code-block:: md
+
+        Term 1
+        : Definition 1 long form
+
+          second paragraph
+
+        Term 2 with *inline markup*
+        ~ Definition 2a compact style
+        ~ Definition 2b
+
+    """
+    isSpace = md.utils.isSpace  # type: ignore
+
+    def skipMarker(state: StateBlock, line: int):
+        """Search `[:~][\n ]`, returns next pos after marker on success or -1 on fail."""
+        start = state.bMarks[line] + state.tShift[line]
+        maximum = state.eMarks[line]
+
+        if start >= maximum:
+            return -1
+
+        # Check bullet
+        marker = state.srcCharCode[start]
+        start += 1
+        if marker != 0x7E and marker != 0x3A:  # ~ :
+            return -1
+
+        pos = state.skipSpaces(start)
+
+        # require space after ":"
+        if start == pos:
+            return -1
+
+        # no empty definitions, e.g. "  : "
+        if pos >= maximum:
+            return -1
+
+        return start
+
+    def markTightParagraphs(state: StateBlock, idx: int):
+
+        level = state.level + 2
+
+        i = idx + 2
+        l2 = len(state.tokens) - 2
+        while i < l2:
+            if (
+                state.tokens[i].level == level
+                and state.tokens[i].type == "paragraph_open"
+            ):
+                state.tokens[i + 2].hidden = True
+                state.tokens[i].hidden = True
+                i += 2
+            i += 1
+
+    def deflist(state: StateBlock, startLine: int, endLine: int, silent: bool):
+
+        if silent:
+            # quirk: validation mode validates a dd block only, not a whole deflist
+            if state.ddIndent < 0:
+                return False
+            return skipMarker(state, startLine) >= 0
+
+        nextLine = startLine + 1
+        if nextLine >= endLine:
+            return False
+
+        if state.isEmpty(nextLine):
+            nextLine += 1
+            if nextLine >= endLine:
+                return False
+
+        if state.sCount[nextLine] < state.blkIndent:
+            return False
+        contentStart = skipMarker(state, nextLine)
+        if contentStart < 0:
+            return False
+
+        # Start list
+        listTokIdx = len(state.tokens)
+        tight = True
+
+        token = state.push("dl_open", "dl", 1)
+        token.map = listLines = [startLine, 0]
+
+        # Iterate list items
+        dtLine = startLine
+        ddLine = nextLine
+
+        # One definition list can contain multiple DTs,
+        # and one DT can be followed by multiple DDs.
+        #
+        # Thus, there is two loops here, and label is
+        # needed to break out of the second one
+        #
+        break_outer = False
+
+        while True:
+            prevEmptyEnd = False
+
+            token = state.push("dt_open", "dt", 1)
+            token.map = [dtLine, dtLine]
+
+            token = state.push("inline", "", 0)
+            token.map = [dtLine, dtLine]
+            token.content = state.getLines(
+                dtLine, dtLine + 1, state.blkIndent, False
+            ).strip()
+            token.children = []
+
+            token = state.push("dt_close", "dt", -1)
+
+            while True:
+                token = state.push("dd_open", "dd", 1)
+                token.map = itemLines = [nextLine, 0]
+
+                pos = contentStart
+                maximum = state.eMarks[ddLine]
+                offset = (
+                    state.sCount[ddLine]
+                    + contentStart
+                    - (state.bMarks[ddLine] + state.tShift[ddLine])
+                )
+
+                while pos < maximum:
+                    ch = state.srcCharCode[pos]
+
+                    if isSpace(ch):
+                        if ch == 0x09:
+                            offset += 4 - offset % 4
+                        else:
+                            offset += 1
+                    else:
+                        break
+
+                    pos += 1
+
+                contentStart = pos
+
+                oldTight = state.tight
+                oldDDIndent = state.ddIndent
+                oldIndent = state.blkIndent
+                oldTShift = state.tShift[ddLine]
+                oldSCount = state.sCount[ddLine]
+                oldParentType = state.parentType
+                state.blkIndent = state.ddIndent = state.sCount[ddLine] + 2
+                state.tShift[ddLine] = contentStart - state.bMarks[ddLine]
+                state.sCount[ddLine] = offset
+                state.tight = True
+                state.parentType = "deflist"
+
+                state.md.block.tokenize(state, ddLine, endLine, True)
+
+                # If any of list item is tight, mark list as tight
+                if not state.tight or prevEmptyEnd:
+                    tight = False
+
+                # Item become loose if finish with empty line,
+                # but we should filter last element, because it means list finish
+                prevEmptyEnd = (state.line - ddLine) > 1 and state.isEmpty(
+                    state.line - 1
+                )
+
+                state.tShift[ddLine] = oldTShift
+                state.sCount[ddLine] = oldSCount
+                state.tight = oldTight
+                state.parentType = oldParentType
+                state.blkIndent = oldIndent
+                state.ddIndent = oldDDIndent
+
+                token = state.push("dd_close", "dd", -1)
+
+                itemLines[1] = nextLine = state.line
+
+                if nextLine >= endLine:
+                    break_outer = True
+                    break
+
+                if state.sCount[nextLine] < state.blkIndent:
+                    break_outer = True
+                    break
+
+                contentStart = skipMarker(state, nextLine)
+                if contentStart < 0:
+                    break
+
+                ddLine = nextLine
+
+                # go to the next loop iteration:
+                # insert DD tag and repeat checking
+
+            if break_outer:
+                break_outer = False
+                break
+
+            if nextLine >= endLine:
+                break
+            dtLine = nextLine
+
+            if state.isEmpty(dtLine):
+                break
+            if state.sCount[dtLine] < state.blkIndent:
+                break
+
+            ddLine = dtLine + 1
+            if ddLine >= endLine:
+                break
+            if state.isEmpty(ddLine):
+                ddLine += 1
+            if ddLine >= endLine:
+                break
+
+            if state.sCount[ddLine] < state.blkIndent:
+                break
+            contentStart = skipMarker(state, ddLine)
+            if contentStart < 0:
+                break
+
+            # go to the next loop iteration:
+            # insert DT and DD tags and repeat checking
+
+        # Finalise list
+        token = state.push("dl_close", "dl", -1)
+
+        listLines[1] = nextLine
+
+        state.line = nextLine
+
+        # mark paragraphs tight if needed
+        if tight:
+            markTightParagraphs(state, listTokIdx)
+
+        return True
+
+    md.block.ruler.before(
+        "paragraph",
+        "deflist",
+        deflist,
+        {"alt": ["paragraph", "reference", "blockquote"]},
+    )
diff --git a/mdit_py_plugins/deflist/port.yaml b/mdit_py_plugins/deflist/port.yaml
new file mode 100644
index 0000000..203c772
--- /dev/null
+++ b/mdit_py_plugins/deflist/port.yaml
@@ -0,0 +1,5 @@
+- package: markdown-it-deflist
+  commit: 20db400948520308291da029a23b0751cb30f3a0
+  date: July 12, 2017
+  version: 2.0.3
+  changes:
diff --git a/mdit_py_plugins/dollarmath/__init__.py b/mdit_py_plugins/dollarmath/__init__.py
new file mode 100644
index 0000000..1840543
--- /dev/null
+++ b/mdit_py_plugins/dollarmath/__init__.py
@@ -0,0 +1 @@
+from .index import dollarmath_plugin  # noqa F401
diff --git a/mdit_py_plugins/dollarmath/index.py b/mdit_py_plugins/dollarmath/index.py
new file mode 100644
index 0000000..5fe0381
--- /dev/null
+++ b/mdit_py_plugins/dollarmath/index.py
@@ -0,0 +1,339 @@
+import re
+from typing import Any, Callable, Dict, Optional
+
+from markdown_it import MarkdownIt
+from markdown_it.common.utils import escapeHtml, isWhiteSpace
+from markdown_it.rules_block import StateBlock
+from markdown_it.rules_inline import StateInline
+
+
+def dollarmath_plugin(
+    md: MarkdownIt,
+    *,
+    allow_labels: bool = True,
+    allow_space: bool = True,
+    allow_digits: bool = True,
+    double_inline: bool = False,
+    label_normalizer: Optional[Callable[[str], str]] = None,
+    renderer: Optional[Callable[[str, Dict[str, Any]], str]] = None,
+    label_renderer: Optional[Callable[[str], str]] = None,
+) -> None:
+    """Plugin for parsing dollar enclosed math,
+    e.g. inline: ``$a=1$``, block: ``$$b=2$$``
+
+    This is an improved version of ``texmath``; it is more performant,
+    and handles ``\\`` escaping properly and allows for more configuration.
+
+    :param allow_labels: Capture math blocks with label suffix, e.g. ``$$a=1$$ (eq1)``
+    :param allow_space: Parse inline math when there is space
+        after/before the opening/closing ``$``, e.g. ``$ a $``
+    :param allow_digits: Parse inline math when there is a digit
+        before/after the opening/closing ``$``, e.g. ``1$`` or ``$2``.
+        This is useful when also using currency.
+    :param double_inline: Search for double-dollar math within inline contexts
+    :param label_normalizer: Function to normalize the label,
+        by default replaces whitespace with `-`
+    :param renderer: Function to render content: `(str, {"display_mode": bool}) -> str`,
+        by default escapes HTML
+    :param label_renderer: Function to render labels, by default creates anchor
+
+    """
+    if label_normalizer is None:
+        label_normalizer = lambda label: re.sub(r"\s+", "-", label)
+
+    md.inline.ruler.before(
+        "escape",
+        "math_inline",
+        math_inline_dollar(allow_space, allow_digits, double_inline),
+    )
+    md.block.ruler.before(
+        "fence", "math_block", math_block_dollar(allow_labels, label_normalizer)
+    )
+
+    # TODO the current render rules are really just for testing
+    # would be good to allow "proper" math rendering,
+    # e.g. https://github.com/roniemartinez/latex2mathml
+
+    if renderer is None:
+        _renderer = lambda content, _: escapeHtml(content)
+    else:
+        _renderer = renderer
+
+    if label_renderer is None:
+        _label_renderer = (
+            lambda label: f'<a href="#{label}" class="mathlabel" title="Permalink to this equation">¶</a>'  # noqa: E501
+        )
+    else:
+        _label_renderer = label_renderer
+
+    def render_math_inline(self, tokens, idx, options, env) -> str:
+        content = _renderer(str(tokens[idx].content).strip(), {"display_mode": False})
+        return f'<span class="math inline">{content}</span>'
+
+    def render_math_inline_double(self, tokens, idx, options, env) -> str:
+        content = _renderer(str(tokens[idx].content).strip(), {"display_mode": True})
+        return f'<div class="math inline">{content}</div>'
+
+    def render_math_block(self, tokens, idx, options, env) -> str:
+        content = _renderer(str(tokens[idx].content).strip(), {"display_mode": True})
+        return f'<div class="math block">\n{content}\n</div>\n'
+
+    def render_math_block_label(self, tokens, idx, options, env) -> str:
+        content = _renderer(str(tokens[idx].content).strip(), {"display_mode": True})
+        _id = tokens[idx].info
+        label = _label_renderer(tokens[idx].info)
+        return f'<div id="{_id}" class="math block">\n{label}\n{content}\n</div>\n'
+
+    md.add_render_rule("math_inline", render_math_inline)
+    md.add_render_rule("math_inline_double", render_math_inline_double)
+
+    md.add_render_rule("math_block", render_math_block)
+    md.add_render_rule("math_block_label", render_math_block_label)
+
+
+def is_escaped(state: StateInline, back_pos: int, mod: int = 0) -> bool:
+    """Test if dollar is escaped."""
+    # count how many \ are before the current position
+    backslashes = 0
+    while back_pos >= 0:
+        back_pos = back_pos - 1
+        if state.srcCharCode[back_pos] == 0x5C:  # /* \ */
+            backslashes += 1
+        else:
+            break
+
+    if not backslashes:
+        return False
+
+    # if an odd number of \ then ignore
+    if (backslashes % 2) != mod:
+        return True
+
+    return False
+
+
+def math_inline_dollar(
+    allow_space: bool = True, allow_digits: bool = True, allow_double: bool = False
+) -> Callable[[StateInline, bool], bool]:
+    """Generate inline dollar rule.
+
+    :param allow_space: Parse inline math when there is space
+        after/before the opening/closing ``$``, e.g. ``$ a $``
+    :param allow_digits: Parse inline math when there is a digit
+        before/after the opening/closing ``$``, e.g. ``1$`` or ``$2``.
+        This is useful when also using currency.
+    :param allow_double: Search for double-dollar math within inline contexts
+
+    """
+
+    def _math_inline_dollar(state: StateInline, silent: bool) -> bool:
+        """Inline dollar rule.
+
+        - Initial check:
+            - check if first character is a $
+            - check if the first character is escaped
+            - check if the next character is a space (if not allow_space)
+            - check if the next character is a digit (if not allow_digits)
+        - Advance one, if allow_double
+        - Find closing (advance one, if allow_double)
+        - Check closing:
+            - check if the previous character is a space (if not allow_space)
+            - check if the next character is a digit (if not allow_digits)
+        - Check empty content
+        """
+
+        # TODO options:
+        # even/odd backslash escaping
+
+        if state.srcCharCode[state.pos] != 0x24:  # /* $ */
+            return False
+
+        if not allow_space:
+            # whitespace not allowed straight after opening $
+            try:
+                if isWhiteSpace(state.srcCharCode[state.pos + 1]):
+                    return False
+            except IndexError:
+                return False
+
+        if not allow_digits:
+            # digit not allowed straight before opening $
+            try:
+                if state.src[state.pos - 1].isdigit():
+                    return False
+            except IndexError:
+                pass
+
+        if is_escaped(state, state.pos):
+            return False
+
+        try:
+            is_double = allow_double and state.srcCharCode[state.pos + 1] == 0x24
+        except IndexError:
+            return False
+
+        # find closing $
+        pos = state.pos + 1 + (1 if is_double else 0)
+        found_closing = False
+        while not found_closing:
+            try:
+                end = state.srcCharCode.index(0x24, pos)
+            except ValueError:
+                return False
+
+            if is_escaped(state, end):
+                pos = end + 1
+                continue
+
+            try:
+                if is_double and not state.srcCharCode[end + 1] == 0x24:
+                    pos = end + 1
+                    continue
+            except IndexError:
+                return False
+
+            if is_double:
+                end += 1
+
+            found_closing = True
+
+        if not found_closing:
+            return False
+
+        if not allow_space:
+            # whitespace not allowed straight before closing $
+            try:
+                if isWhiteSpace(state.srcCharCode[end - 1]):
+                    return False
+            except IndexError:
+                return False
+
+        if not allow_digits:
+            # digit not allowed straight after closing $
+            try:
+                if state.src[end + 1].isdigit():
+                    return False
+            except IndexError:
+                pass
+
+        text = (
+            state.src[state.pos + 2 : end - 1]
+            if is_double
+            else state.src[state.pos + 1 : end]
+        )
+
+        # ignore empty
+        if not text:
+            return False
+
+        if not silent:
+            token = state.push(
+                "math_inline_double" if is_double else "math_inline", "math", 0
+            )
+            token.content = text
+            token.markup = "$$" if is_double else "$"
+
+        state.pos = end + 1
+
+        return True
+
+    return _math_inline_dollar
+
+
+# reversed end of block dollar equation, with equation label
+DOLLAR_EQNO_REV = re.compile(r"^\s*\)([^)$\r\n]+?)\(\s*\${2}")
+
+
+def math_block_dollar(
+    allow_labels: bool = True,
+    label_normalizer: Optional[Callable[[str], str]] = None,
+) -> Callable[[StateBlock, int, int, bool], bool]:
+    """Generate block dollar rule."""
+
+    def _math_block_dollar(
+        state: StateBlock, startLine: int, endLine: int, silent: bool
+    ) -> bool:
+
+        # TODO internal backslash escaping
+
+        haveEndMarker = False
+        startPos = state.bMarks[startLine] + state.tShift[startLine]
+        end = state.eMarks[startLine]
+
+        # if it's indented more than 3 spaces, it should be a code block
+        if state.sCount[startLine] - state.blkIndent >= 4:
+            return False
+
+        if startPos + 2 > end:
+            return False
+
+        if (
+            state.srcCharCode[startPos] != 0x24
+            or state.srcCharCode[startPos + 1] != 0x24
+        ):  # /* $ */
+            return False
+
+        # search for end of block
+        nextLine = startLine
+        label = None
+
+        # search for end of block on same line
+        lineText = state.src[startPos:end]
+        if len(lineText.strip()) > 3:
+
+            if lineText.strip().endswith("$$"):
+                haveEndMarker = True
+                end = end - 2 - (len(lineText) - len(lineText.strip()))
+            elif allow_labels:
+                # reverse the line and match
+                eqnoMatch = DOLLAR_EQNO_REV.match(lineText[::-1])
+                if eqnoMatch:
+                    haveEndMarker = True
+                    label = eqnoMatch.group(1)[::-1]
+                    end = end - eqnoMatch.end()
+
+        # search for end of block on subsequent line
+        if not haveEndMarker:
+            while True:
+                nextLine += 1
+                if nextLine >= endLine:
+                    break
+
+                start = state.bMarks[nextLine] + state.tShift[nextLine]
+                end = state.eMarks[nextLine]
+
+                if end - start < 2:
+                    continue
+
+                lineText = state.src[start:end]
+
+                if lineText.strip().endswith("$$"):
+                    haveEndMarker = True
+                    end = end - 2 - (len(lineText) - len(lineText.strip()))
+                    break
+
+                # reverse the line and match
+                if allow_labels:
+                    eqnoMatch = DOLLAR_EQNO_REV.match(lineText[::-1])
+                    if eqnoMatch:
+                        haveEndMarker = True
+                        label = eqnoMatch.group(1)[::-1]
+                        end = end - eqnoMatch.end()
+                        break
+
+        if not haveEndMarker:
+            return False
+
+        state.line = nextLine + (1 if haveEndMarker else 0)
+
+        token = state.push("math_block_label" if label else "math_block", "math", 0)
+        token.block = True
+        token.content = state.src[startPos + 2 : end]
+        token.markup = "$$"
+        token.map = [startLine, state.line]
+        if label:
+            token.info = label if label_normalizer is None else label_normalizer(label)
+
+        return True
+
+    return _math_block_dollar
diff --git a/mdit_py_plugins/field_list/__init__.py b/mdit_py_plugins/field_list/__init__.py
new file mode 100644
index 0000000..9e21fb5
--- /dev/null
+++ b/mdit_py_plugins/field_list/__init__.py
@@ -0,0 +1,208 @@
+"""Field list plugin"""
+from contextlib import contextmanager
+from typing import Tuple
+
+from markdown_it import MarkdownIt
+from markdown_it.rules_block import StateBlock
+
+
+def fieldlist_plugin(md: MarkdownIt):
+    """Field lists are mappings from field names to field bodies, based on the
+    `reStructureText syntax
+    <https://docutils.sourceforge.io/docs/ref/rst/restructuredtext.html#field-lists>`_.
+
+    .. code-block:: md
+
+        :name *markup*:
+        :name1: body content
+        :name2: paragraph 1
+
+                paragraph 2
+        :name3:
+          paragraph 1
+
+          paragraph 2
+
+    A field name may consist of any characters except colons (":").
+    Inline markup is parsed in field names.
+
+    The field name is followed by whitespace and the field body.
+    The field body may be empty or contain multiple body elements.
+    The field body is aligned either by the start of the body on the first line or,
+    if no body content is on the first line, by 2 spaces.
+    """
+    md.block.ruler.before(
+        "paragraph",
+        "fieldlist",
+        _fieldlist_rule,
+        {"alt": ["paragraph", "reference", "blockquote"]},
+    )
+
+
+def parseNameMarker(state: StateBlock, startLine: int) -> Tuple[int, str]:
+    """Parse field name: `:name:`
+
+    :returns: position after name marker, name text
+    """
+    start = state.bMarks[startLine] + state.tShift[startLine]
+    pos = start
+    maximum = state.eMarks[startLine]
+
+    # marker should have at least 3 chars (colon + character + colon)
+    if pos + 2 >= maximum:
+        return -1, ""
+
+    # first character should be ':'
+    if state.src[pos] != ":":
+        return -1, ""
+
+    # scan name length
+    name_length = 1
+    found_close = False
+    for ch in state.src[pos + 1 :]:
+        if ch == "\n":
+            break
+        if ch == ":":
+            # TODO backslash escapes
+            found_close = True
+            break
+        name_length += 1
+
+    if not found_close:
+        return -1, ""
+
+    # get name
+    name_text = state.src[pos + 1 : pos + name_length]
+
+    # name should contain at least one character
+    if not name_text.strip():
+        return -1, ""
+
+    return pos + name_length + 1, name_text
+
+
+@contextmanager
+def set_parent_type(state: StateBlock, name: str):
+    """Temporarily set parent type to `name`"""
+    oldParentType = state.parentType
+    state.parentType = name
+    yield
+    state.parentType = oldParentType
+
+
+def _fieldlist_rule(state: StateBlock, startLine: int, endLine: int, silent: bool):
+    # adapted from markdown_it/rules_block/list.py::list_block
+
+    # if it's indented more than 3 spaces, it should be a code block
+    if state.sCount[startLine] - state.blkIndent >= 4:
+        return False
+
+    posAfterName, name_text = parseNameMarker(state, startLine)
+    if posAfterName < 0:
+        return False
+
+    # For validation mode we can terminate immediately
+    if silent:
+        return True
+
+    # start field list
+    token = state.push("field_list_open", "dl", 1)
+    token.attrSet("class", "field-list")
+    token.map = listLines = [startLine, 0]
+
+    # iterate list items
+    nextLine = startLine
+
+    with set_parent_type(state, "fieldlist"):
+
+        while nextLine < endLine:
+
+            # create name tokens
+            token = state.push("fieldlist_name_open", "dt", 1)
+            token.map = [startLine, startLine]
+            token = state.push("inline", "", 0)
+            token.map = [startLine, startLine]
+            token.content = name_text
+            token.children = []
+            token = state.push("fieldlist_name_close", "dt", -1)
+
+            # set indent positions
+            pos = posAfterName
+            maximum = state.eMarks[nextLine]
+            offset = (
+                state.sCount[nextLine]
+                + posAfterName
+                - (state.bMarks[startLine] + state.tShift[startLine])
+            )
+
+            # find indent to start of body on first line
+            while pos < maximum:
+                ch = state.srcCharCode[pos]
+
+                if ch == 0x09:  # \t
+                    offset += 4 - (offset + state.bsCount[nextLine]) % 4
+                elif ch == 0x20:  # \s
+                    offset += 1
+                else:
+                    break
+
+                pos += 1
+
+            contentStart = pos
+
+            # set indent for body text
+            if contentStart >= maximum:
+                # no body on first line, so use constant indentation
+                # TODO adapt to indentation of subsequent lines?
+                indent = 2
+            else:
+                indent = offset
+
+            # Run subparser on the field body
+            token = state.push("fieldlist_body_open", "dd", 1)
+            token.map = itemLines = [startLine, 0]
+
+            # change current state, then restore it after parser subcall
+            oldTShift = state.tShift[startLine]
+            oldSCount = state.sCount[startLine]
+            oldBlkIndent = state.blkIndent
+
+            state.tShift[startLine] = contentStart - state.bMarks[startLine]
+            state.sCount[startLine] = offset
+            state.blkIndent = indent
+
+            state.md.block.tokenize(state, startLine, endLine)
+
+            state.blkIndent = oldBlkIndent
+            state.tShift[startLine] = oldTShift
+            state.sCount[startLine] = oldSCount
+
+            token = state.push("fieldlist_body_close", "dd", -1)
+
+            nextLine = startLine = state.line
+            itemLines[1] = nextLine
+
+            if nextLine >= endLine:
+                break
+
+            contentStart = state.bMarks[startLine]
+
+            # Try to check if list is terminated or continued.
+            if state.sCount[nextLine] < state.blkIndent:
+                break
+
+            # if it's indented more than 3 spaces, it should be a code block
+            if state.sCount[startLine] - state.blkIndent >= 4:
+                break
+
+            # get next field item
+            posAfterName, name_text = parseNameMarker(state, startLine)
+            if posAfterName < 0:
+                break
+
+        # Finalize list
+        token = state.push("field_list_close", "dl", -1)
+        listLines[1] = nextLine
+        state.line = nextLine
+
+    return True
diff --git a/mdit_py_plugins/footnote/LICENSE b/mdit_py_plugins/footnote/LICENSE
new file mode 100644
index 0000000..2fd4e3d
--- /dev/null
+++ b/mdit_py_plugins/footnote/LICENSE
@@ -0,0 +1,22 @@
+Copyright (c) 2014-2015 Vitaly Puzrin, Alex Kocharin.
+
+Permission is hereby granted, free of charge, to any person
+obtaining a copy of this software and associated documentation
+files (the "Software"), to deal in the Software without
+restriction, including without limitation the rights to use,
+copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the
+Software is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
diff --git a/mdit_py_plugins/footnote/__init__.py b/mdit_py_plugins/footnote/__init__.py
new file mode 100644
index 0000000..d85daae
--- /dev/null
+++ b/mdit_py_plugins/footnote/__init__.py
@@ -0,0 +1 @@
+from .index import footnote_plugin  # noqa: F401
diff --git a/mdit_py_plugins/footnote/index.py b/mdit_py_plugins/footnote/index.py
new file mode 100644
index 0000000..119fb71
--- /dev/null
+++ b/mdit_py_plugins/footnote/index.py
@@ -0,0 +1,430 @@
+# Process footnotes
+#
+
+from typing import List, Optional
+
+from markdown_it import MarkdownIt
+from markdown_it.common.utils import isSpace
+from markdown_it.helpers import parseLinkLabel
+from markdown_it.rules_block import StateBlock
+from markdown_it.rules_inline import StateInline
+from markdown_it.token import Token
+
+
+def footnote_plugin(md: MarkdownIt):
+    """Plugin ported from
+    `markdown-it-footnote <https://github.com/markdown-it/markdown-it-footnote>`__.
+
+    It is based on the
+    `pandoc definition <http://johnmacfarlane.net/pandoc/README.html#footnotes>`__:
+
+    .. code-block:: md
+
+        Normal footnote:
+
+        Here is a footnote reference,[^1] and another.[^longnote]
+
+        [^1]: Here is the footnote.
+
+        [^longnote]: Here's one with multiple blocks.
+
+            Subsequent paragraphs are indented to show that they
+        belong to the previous footnote.
+
+    """
+    md.block.ruler.before(
+        "reference", "footnote_def", footnote_def, {"alt": ["paragraph", "reference"]}
+    )
+    md.inline.ruler.after("image", "footnote_inline", footnote_inline)
+    md.inline.ruler.after("footnote_inline", "footnote_ref", footnote_ref)
+    md.core.ruler.after("inline", "footnote_tail", footnote_tail)
+
+    md.add_render_rule("footnote_ref", render_footnote_ref)
+    md.add_render_rule("footnote_block_open", render_footnote_block_open)
+    md.add_render_rule("footnote_block_close", render_footnote_block_close)
+    md.add_render_rule("footnote_open", render_footnote_open)
+    md.add_render_rule("footnote_close", render_footnote_close)
+    md.add_render_rule("footnote_anchor", render_footnote_anchor)
+
+    # helpers (only used in other rules, no tokens are attached to those)
+    md.add_render_rule("footnote_caption", render_footnote_caption)
+    md.add_render_rule("footnote_anchor_name", render_footnote_anchor_name)
+
+
+# ## RULES ##
+
+
+def footnote_def(state: StateBlock, startLine: int, endLine: int, silent: bool):
+    """Process footnote block definition"""
+
+    start = state.bMarks[startLine] + state.tShift[startLine]
+    maximum = state.eMarks[startLine]
+
+    # line should be at least 5 chars - "[^x]:"
+    if start + 4 > maximum:
+        return False
+
+    if state.srcCharCode[start] != 0x5B:  # /* [ */
+        return False
+    if state.srcCharCode[start + 1] != 0x5E:  # /* ^ */
+        return False
+
+    pos = start + 2
+    while pos < maximum:
+        if state.srcCharCode[pos] == 0x20:
+            return False
+        if state.srcCharCode[pos] == 0x5D:  # /* ] */
+            break
+        pos += 1
+
+    if pos == start + 2:  # no empty footnote labels
+        return False
+    pos += 1
+    if pos >= maximum or state.srcCharCode[pos] != 0x3A:  # /* : */
+        return False
+    if silent:
+        return True
+    pos += 1
+
+    label = state.src[start + 2 : pos - 2]
+    state.env.setdefault("footnotes", {}).setdefault("refs", {})[":" + label] = -1
+
+    open_token = Token("footnote_reference_open", "", 1)
+    open_token.meta = {"label": label}
+    open_token.level = state.level
+    state.level += 1
+    state.tokens.append(open_token)
+
+    oldBMark = state.bMarks[startLine]
+    oldTShift = state.tShift[startLine]
+    oldSCount = state.sCount[startLine]
+    oldParentType = state.parentType
+
+    posAfterColon = pos
+    initial = offset = (
+        state.sCount[startLine]
+        + pos
+        - (state.bMarks[startLine] + state.tShift[startLine])
+    )
+
+    while pos < maximum:
+        ch = state.srcCharCode[pos]
+
+        if isSpace(ch):
+            if ch == 0x09:
+                offset += 4 - offset % 4
+            else:
+                offset += 1
+
+        else:
+            break
+
+        pos += 1
+
+    state.tShift[startLine] = pos - posAfterColon
+    state.sCount[startLine] = offset - initial
+
+    state.bMarks[startLine] = posAfterColon
+    state.blkIndent += 4
+    state.parentType = "footnote"
+
+    if state.sCount[startLine] < state.blkIndent:
+        state.sCount[startLine] += state.blkIndent
+
+    state.md.block.tokenize(state, startLine, endLine, True)
+
+    state.parentType = oldParentType
+    state.blkIndent -= 4
+    state.tShift[startLine] = oldTShift
+    state.sCount[startLine] = oldSCount
+    state.bMarks[startLine] = oldBMark
+
+    open_token.map = [startLine, state.line]
+
+    token = Token("footnote_reference_close", "", -1)
+    state.level -= 1
+    token.level = state.level
+    state.tokens.append(token)
+
+    return True
+
+
+def footnote_inline(state: StateInline, silent: bool):
+    """Process inline footnotes (^[...])"""
+
+    maximum = state.posMax
+    start = state.pos
+
+    if start + 2 >= maximum:
+        return False
+    if state.srcCharCode[start] != 0x5E:  # /* ^ */
+        return False
+    if state.srcCharCode[start + 1] != 0x5B:  # /* [ */
+        return False
+
+    labelStart = start + 2
+    labelEnd = parseLinkLabel(state, start + 1)
+
+    # parser failed to find ']', so it's not a valid note
+    if labelEnd < 0:
+        return False
+
+    # We found the end of the link, and know for a fact it's a valid link
+    # so all that's left to do is to call tokenizer.
+    #
+    if not silent:
+        refs = state.env.setdefault("footnotes", {}).setdefault("list", {})
+        footnoteId = len(refs)
+
+        tokens: List[Token] = []
+        state.md.inline.parse(
+            state.src[labelStart:labelEnd], state.md, state.env, tokens
+        )
+
+        token = state.push("footnote_ref", "", 0)
+        token.meta = {"id": footnoteId}
+
+        refs[footnoteId] = {"content": state.src[labelStart:labelEnd], "tokens": tokens}
+
+    state.pos = labelEnd + 1
+    state.posMax = maximum
+    return True
+
+
+def footnote_ref(state: StateInline, silent: bool):
+    """Process footnote references ([^...])"""
+
+    maximum = state.posMax
+    start = state.pos
+
+    # should be at least 4 chars - "[^x]"
+    if start + 3 > maximum:
+        return False
+
+    if "footnotes" not in state.env or "refs" not in state.env["footnotes"]:
+        return False
+    if state.srcCharCode[start] != 0x5B:  # /* [ */
+        return False
+    if state.srcCharCode[start + 1] != 0x5E:  # /* ^ */
+        return False
+
+    pos = start + 2
+    while pos < maximum:
+        if state.srcCharCode[pos] == 0x20:
+            return False
+        if state.srcCharCode[pos] == 0x0A:
+            return False
+        if state.srcCharCode[pos] == 0x5D:  # /* ] */
+            break
+        pos += 1
+
+    if pos == start + 2:  # no empty footnote labels
+        return False
+    if pos >= maximum:
+        return False
+    pos += 1
+
+    label = state.src[start + 2 : pos - 1]
+    if (":" + label) not in state.env["footnotes"]["refs"]:
+        return False
+
+    if not silent:
+        if "list" not in state.env["footnotes"]:
+            state.env["footnotes"]["list"] = {}
+
+        if state.env["footnotes"]["refs"][":" + label] < 0:
+            footnoteId = len(state.env["footnotes"]["list"])
+            state.env["footnotes"]["list"][footnoteId] = {"label": label, "count": 0}
+            state.env["footnotes"]["refs"][":" + label] = footnoteId
+        else:
+            footnoteId = state.env["footnotes"]["refs"][":" + label]
+
+        footnoteSubId = state.env["footnotes"]["list"][footnoteId]["count"]
+        state.env["footnotes"]["list"][footnoteId]["count"] += 1
+
+        token = state.push("footnote_ref", "", 0)
+        token.meta = {"id": footnoteId, "subId": footnoteSubId, "label": label}
+
+    state.pos = pos
+    state.posMax = maximum
+    return True
+
+
+def footnote_tail(state: StateBlock, *args, **kwargs):
+    """Post-processing step, to move footnote tokens to end of the token stream.
+
+    Also removes un-referenced tokens.
+    """
+
+    insideRef = False
+    refTokens = {}
+
+    if "footnotes" not in state.env:
+        return
+
+    current: List[Token] = []
+    tok_filter = []
+    for tok in state.tokens:
+
+        if tok.type == "footnote_reference_open":
+            insideRef = True
+            current = []
+            currentLabel = tok.meta["label"]
+            tok_filter.append(False)
+            continue
+
+        if tok.type == "footnote_reference_close":
+            insideRef = False
+            # prepend ':' to avoid conflict with Object.prototype members
+            refTokens[":" + currentLabel] = current
+            tok_filter.append(False)
+            continue
+
+        if insideRef:
+            current.append(tok)
+
+        tok_filter.append((not insideRef))
+
+    state.tokens = [t for t, f in zip(state.tokens, tok_filter) if f]
+
+    if "list" not in state.env.get("footnotes", {}):
+        return
+    foot_list = state.env["footnotes"]["list"]
+
+    token = Token("footnote_block_open", "", 1)
+    state.tokens.append(token)
+
+    for i, foot_note in foot_list.items():
+        token = Token("footnote_open", "", 1)
+        token.meta = {"id": i, "label": foot_note.get("label", None)}
+        # TODO propagate line positions of original foot note
+        # (but don't store in token.map, because this is used for scroll syncing)
+        state.tokens.append(token)
+
+        if "tokens" in foot_note:
+            tokens = []
+
+            token = Token("paragraph_open", "p", 1)
+            token.block = True
+            tokens.append(token)
+
+            token = Token("inline", "", 0)
+            token.children = foot_note["tokens"]
+            token.content = foot_note["content"]
+            tokens.append(token)
+
+            token = Token("paragraph_close", "p", -1)
+            token.block = True
+            tokens.append(token)
+
+        elif "label" in foot_note:
+            tokens = refTokens[":" + foot_note["label"]]
+
+        state.tokens.extend(tokens)
+        if state.tokens[len(state.tokens) - 1].type == "paragraph_close":
+            lastParagraph: Optional[Token] = state.tokens.pop()
+        else:
+            lastParagraph = None
+
+        t = (
+            foot_note["count"]
+            if (("count" in foot_note) and (foot_note["count"] > 0))
+            else 1
+        )
+        j = 0
+        while j < t:
+            token = Token("footnote_anchor", "", 0)
+            token.meta = {"id": i, "subId": j, "label": foot_note.get("label", None)}
+            state.tokens.append(token)
+            j += 1
+
+        if lastParagraph:
+            state.tokens.append(lastParagraph)
+
+        token = Token("footnote_close", "", -1)
+        state.tokens.append(token)
+
+    token = Token("footnote_block_close", "", -1)
+    state.tokens.append(token)
+
+
+########################################
+# Renderer partials
+
+
+def render_footnote_anchor_name(self, tokens, idx, options, env):
+    n = str(tokens[idx].meta["id"] + 1)
+    prefix = ""
+
+    doc_id = env.get("docId", None)
+    if isinstance(doc_id, str):
+        prefix = f"-{doc_id}-"
+
+    return prefix + n
+
+
+def render_footnote_caption(self, tokens, idx, options, env):
+    n = str(tokens[idx].meta["id"] + 1)
+
+    if tokens[idx].meta.get("subId", -1) > 0:
+        n += ":" + str(tokens[idx].meta["subId"])
+
+    return "[" + n + "]"
+
+
+def render_footnote_ref(self, tokens, idx, options, env):
+    ident = self.rules["footnote_anchor_name"](tokens, idx, options, env)
+    caption = self.rules["footnote_caption"](tokens, idx, options, env)
+    refid = ident
+
+    if tokens[idx].meta.get("subId", -1) > 0:
+        refid += ":" + str(tokens[idx].meta["subId"])
+
+    return (
+        '<sup class="footnote-ref"><a href="#fn'
+        + ident
+        + '" id="fnref'
+        + refid
+        + '">'
+        + caption
+        + "</a></sup>"
+    )
+
+
+def render_footnote_block_open(self, tokens, idx, options, env):
+    return (
+        (
+            '<hr class="footnotes-sep" />\n'
+            if options.xhtmlOut
+            else '<hr class="footnotes-sep">\n'
+        )
+        + '<section class="footnotes">\n'
+        + '<ol class="footnotes-list">\n'
+    )
+
+
+def render_footnote_block_close(self, tokens, idx, options, env):
+    return "</ol>\n</section>\n"
+
+
+def render_footnote_open(self, tokens, idx, options, env):
+    ident = self.rules["footnote_anchor_name"](tokens, idx, options, env)
+
+    if tokens[idx].meta.get("subId", -1) > 0:
+        ident += ":" + tokens[idx].meta["subId"]
+
+    return '<li id="fn' + ident + '" class="footnote-item">'
+
+
+def render_footnote_close(self, tokens, idx, options, env):
+    return "</li>\n"
+
+
+def render_footnote_anchor(self, tokens, idx, options, env):
+    ident = self.rules["footnote_anchor_name"](tokens, idx, options, env)
+
+    if tokens[idx].meta["subId"] > 0:
+        ident += ":" + str(tokens[idx].meta["subId"])
+
+    # ↩ with escape code to prevent display as Apple Emoji on iOS
+    return ' <a href="#fnref' + ident + '" class="footnote-backref">\u21a9\uFE0E</a>'
diff --git a/mdit_py_plugins/footnote/port.yaml b/mdit_py_plugins/footnote/port.yaml
new file mode 100644
index 0000000..722f5e4
--- /dev/null
+++ b/mdit_py_plugins/footnote/port.yaml
@@ -0,0 +1,4 @@
+- package: markdown-it-footnote
+  commit: cab6665ba39c6eb517cbbae3baeb549004bf740c
+  date: Jul 9, 2019
+  version: 3.0.2
diff --git a/mdit_py_plugins/front_matter/LICENSE b/mdit_py_plugins/front_matter/LICENSE
new file mode 100644
index 0000000..54c0b84
--- /dev/null
+++ b/mdit_py_plugins/front_matter/LICENSE
@@ -0,0 +1,22 @@
+Copyright (c) 2016-2020 ParkSB.
+
+Permission is hereby granted, free of charge, to any person
+obtaining a copy of this software and associated documentation
+files (the "Software"), to deal in the Software without
+restriction, including without limitation the rights to use,
+copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the
+Software is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
diff --git a/mdit_py_plugins/front_matter/__init__.py b/mdit_py_plugins/front_matter/__init__.py
new file mode 100644
index 0000000..26bce1d
--- /dev/null
+++ b/mdit_py_plugins/front_matter/__init__.py
@@ -0,0 +1 @@
+from .index import front_matter_plugin  # noqa: F401
diff --git a/mdit_py_plugins/front_matter/index.py b/mdit_py_plugins/front_matter/index.py
new file mode 100644
index 0000000..2077925
--- /dev/null
+++ b/mdit_py_plugins/front_matter/index.py
@@ -0,0 +1,138 @@
+# Process front matter and pass to cb
+from math import floor
+
+from markdown_it import MarkdownIt
+from markdown_it.common.utils import charCodeAt
+from markdown_it.rules_block import StateBlock
+
+
+def front_matter_plugin(md: MarkdownIt):
+    """Plugin ported from
+    `markdown-it-front-matter <https://github.com/ParkSB/markdown-it-front-matter>`__.
+
+    It parses initial metadata, stored between opening/closing dashes:
+
+    .. code-block:: md
+
+        ---
+        valid-front-matter: true
+        ---
+
+    """
+    frontMatter = make_front_matter_rule()
+    md.block.ruler.before(
+        "table",
+        "front_matter",
+        frontMatter,
+        {"alt": ["paragraph", "reference", "blockquote", "list"]},
+    )
+
+
+def make_front_matter_rule():
+    min_markers = 3
+    marker_str = "-"
+    marker_char = charCodeAt(marker_str, 0)
+    marker_len = len(marker_str)
+
+    def frontMatter(state: StateBlock, startLine: int, endLine: int, silent: bool):
+        auto_closed = False
+        start = state.bMarks[startLine] + state.tShift[startLine]
+        maximum = state.eMarks[startLine]
+        src_len = len(state.src)
+
+        # Check out the first character of the first line quickly,
+        # this should filter out non-front matter
+        if startLine != 0 or marker_char != state.srcCharCode[0]:
+            return False
+
+        # Check out the rest of the marker string
+        # while pos <= 3
+        pos = start + 1
+        while pos <= maximum and pos < src_len:
+            if marker_str[(pos - start) % marker_len] != state.src[pos]:
+                break
+            pos += 1
+
+        marker_count = floor((pos - start) / marker_len)
+
+        if marker_count < min_markers:
+            return False
+
+        pos -= (pos - start) % marker_len
+
+        # Since start is found, we can report success here in validation mode
+        if silent:
+            return True
+
+        # Search for the end of the block
+        nextLine = startLine
+
+        while True:
+            nextLine += 1
+            if nextLine >= endLine:
+                # unclosed block should be autoclosed by end of document.
+                return False
+
+            if state.src[start:maximum] == "...":
+                break
+
+            start = state.bMarks[nextLine] + state.tShift[nextLine]
+            maximum = state.eMarks[nextLine]
+
+            if start < maximum and state.sCount[nextLine] < state.blkIndent:
+                # non-empty line with negative indent should stop the list:
+                # - ```
+                #  test
+                break
+
+            if marker_char != state.srcCharCode[start]:
+                continue
+
+            if state.sCount[nextLine] - state.blkIndent >= 4:
+                # closing fence should be indented less than 4 spaces
+                continue
+
+            pos = start + 1
+            while pos < maximum:
+                if marker_str[(pos - start) % marker_len] != state.src[pos]:
+                    break
+                pos += 1
+
+            # closing code fence must be at least as long as the opening one
+            if floor((pos - start) / marker_len) < marker_count:
+                continue
+
+            # make sure tail has spaces only
+            pos -= (pos - start) % marker_len
+            pos = state.skipSpaces(pos)
+
+            if pos < maximum:
+                continue
+
+            # found!
+            auto_closed = True
+            break
+
+        old_parent = state.parentType
+        old_line_max = state.lineMax
+        state.parentType = "container"
+
+        # this will prevent lazy continuations from ever going past our end marker
+        state.lineMax = nextLine
+
+        token = state.push("front_matter", "", 0)
+        token.hidden = True
+        token.markup = marker_str * min_markers
+        token.content = state.src[
+            state.bMarks[startLine + 1] : state.eMarks[nextLine - 1]
+        ]
+        token.block = True
+
+        state.parentType = old_parent
+        state.lineMax = old_line_max
+        state.line = nextLine + (1 if auto_closed else 0)
+        token.map = [startLine, state.line]
+
+        return True
+
+    return frontMatter
diff --git a/mdit_py_plugins/front_matter/port.yaml b/mdit_py_plugins/front_matter/port.yaml
new file mode 100644
index 0000000..f7d145f
--- /dev/null
+++ b/mdit_py_plugins/front_matter/port.yaml
@@ -0,0 +1,4 @@
+- package: markdown-it-front-matter
+  commit: b404f5d8fd536e7e9ddb276267ae0b6f76e9cf9d
+  date: Feb 7, 2020
+  version: 0.2.1
diff --git a/mdit_py_plugins/myst_blocks/__init__.py b/mdit_py_plugins/myst_blocks/__init__.py
new file mode 100644
index 0000000..434cad6
--- /dev/null
+++ b/mdit_py_plugins/myst_blocks/__init__.py
@@ -0,0 +1 @@
+from .index import myst_block_plugin  # noqa: F401
diff --git a/mdit_py_plugins/myst_blocks/index.py b/mdit_py_plugins/myst_blocks/index.py
new file mode 100644
index 0000000..d0e4cf6
--- /dev/null
+++ b/mdit_py_plugins/myst_blocks/index.py
@@ -0,0 +1,153 @@
+import itertools
+
+from markdown_it import MarkdownIt
+from markdown_it.common.utils import escapeHtml, isSpace
+from markdown_it.rules_block import StateBlock
+
+
+def myst_block_plugin(md: MarkdownIt):
+    """Parse MyST targets (``(name)=``), blockquotes (``% comment``) and block breaks (``+++``)."""
+    md.block.ruler.before(
+        "blockquote",
+        "myst_line_comment",
+        line_comment,
+        {"alt": ["paragraph", "reference", "blockquote", "list", "footnote_def"]},
+    )
+    md.block.ruler.before(
+        "hr",
+        "myst_block_break",
+        block_break,
+        {"alt": ["paragraph", "reference", "blockquote", "list", "footnote_def"]},
+    )
+    md.block.ruler.before(
+        "hr",
+        "myst_target",
+        target,
+        {"alt": ["paragraph", "reference", "blockquote", "list", "footnote_def"]},
+    )
+    md.add_render_rule("myst_target", render_myst_target)
+    md.add_render_rule("myst_line_comment", render_myst_line_comment)
+
+
+def line_comment(state: StateBlock, startLine: int, endLine: int, silent: bool):
+
+    pos = state.bMarks[startLine] + state.tShift[startLine]
+    maximum = state.eMarks[startLine]
+
+    # if it's indented more than 3 spaces, it should be a code block
+    if state.sCount[startLine] - state.blkIndent >= 4:
+        return False
+
+    if state.src[pos] != "%":
+        return False
+
+    if silent:
+        return True
+
+    token = state.push("myst_line_comment", "", 0)
+    token.attrSet("class", "myst-line-comment")
+    token.content = state.src[pos + 1 : maximum].rstrip()
+    token.markup = "%"
+
+    # search end of block while appending lines to `token.content`
+    for nextLine in itertools.count(startLine + 1):
+        if nextLine >= endLine:
+            break
+        pos = state.bMarks[nextLine] + state.tShift[nextLine]
+        maximum = state.eMarks[nextLine]
+
+        if state.src[pos] != "%":
+            break
+        token.content += "\n" + state.src[pos + 1 : maximum].rstrip()
+
+    state.line = nextLine
+    token.map = [startLine, nextLine]
+
+    return True
+
+
+def block_break(state: StateBlock, startLine: int, endLine: int, silent: bool):
+
+    pos = state.bMarks[startLine] + state.tShift[startLine]
+    maximum = state.eMarks[startLine]
+
+    # if it's indented more than 3 spaces, it should be a code block
+    if state.sCount[startLine] - state.blkIndent >= 4:
+        return False
+
+    marker = state.srcCharCode[pos]
+    pos += 1
+
+    # Check block marker /* + */
+    if marker != 0x2B:
+        return False
+
+    # markers can be mixed with spaces, but there should be at least 3 of them
+
+    cnt = 1
+    while pos < maximum:
+        ch = state.srcCharCode[pos]
+        if ch != marker and not isSpace(ch):
+            break
+        if ch == marker:
+            cnt += 1
+        pos += 1
+
+    if cnt < 3:
+        return False
+
+    if silent:
+        return True
+
+    state.line = startLine + 1
+
+    token = state.push("myst_block_break", "hr", 0)
+    token.attrSet("class", "myst-block")
+    token.content = state.src[pos:maximum].strip()
+    token.map = [startLine, state.line]
+    token.markup = chr(marker) * cnt
+
+    return True
+
+
+def target(state: StateBlock, startLine: int, endLine: int, silent: bool):
+
+    pos = state.bMarks[startLine] + state.tShift[startLine]
+    maximum = state.eMarks[startLine]
+
+    # if it's indented more than 3 spaces, it should be a code block
+    if state.sCount[startLine] - state.blkIndent >= 4:
+        return False
+
+    text = state.src[pos:maximum].strip()
+    if not text.startswith("("):
+        return False
+    if not text.endswith(")="):
+        return False
+    if not text[1:-2]:
+        return False
+
+    if silent:
+        return True
+
+    state.line = startLine + 1
+
+    token = state.push("myst_target", "", 0)
+    token.attrSet("class", "myst-target")
+    token.content = text[1:-2]
+    token.map = [startLine, state.line]
+
+    return True
+
+
+def render_myst_target(self, tokens, idx, options, env):
+    label = tokens[idx].content
+    class_name = "myst-target"
+    target = f'<a href="#{label}">({label})=</a>'
+    return f'<div class="{class_name}">{target}</div>'
+
+
+def render_myst_line_comment(self, tokens, idx, options, env):
+    # Strip leading whitespace from all lines
+    content = "\n".join(line.lstrip() for line in tokens[idx].content.split("\n"))
+    return f"<!-- {escapeHtml(content)} -->"
diff --git a/mdit_py_plugins/myst_role/__init__.py b/mdit_py_plugins/myst_role/__init__.py
new file mode 100644
index 0000000..67b87f8
--- /dev/null
+++ b/mdit_py_plugins/myst_role/__init__.py
@@ -0,0 +1 @@
+from .index import myst_role_plugin  # noqa: F401
diff --git a/mdit_py_plugins/myst_role/index.py b/mdit_py_plugins/myst_role/index.py
new file mode 100644
index 0000000..53ef60e
--- /dev/null
+++ b/mdit_py_plugins/myst_role/index.py
@@ -0,0 +1,65 @@
+import re
+
+from markdown_it import MarkdownIt
+from markdown_it.common.utils import escapeHtml
+from markdown_it.rules_inline import StateInline
+
+VALID_NAME_PATTERN = re.compile(r"^\{([a-zA-Z0-9\_\-\+\:]+)\}")
+
+
+def myst_role_plugin(md: MarkdownIt):
+    """Parse ``{role-name}`content```"""
+    md.inline.ruler.before("backticks", "myst_role", myst_role)
+    md.add_render_rule("myst_role", render_myst_role)
+
+
+def myst_role(state: StateInline, silent: bool):
+
+    # check name
+    match = VALID_NAME_PATTERN.match(state.src[state.pos :])
+    if not match:
+        return False
+    name = match.group(1)
+
+    # check for starting backslash escape
+    try:
+        if state.srcCharCode[state.pos - 1] == 0x5C:  # /* \ */
+            # escaped (this could be improved in the case of edge case '\\{')
+            return False
+    except IndexError:
+        pass
+
+    # scan opening tick length
+    start = pos = state.pos + match.end()
+    try:
+        while state.src[pos] == "`":
+            pos += 1
+    except IndexError:
+        return False
+
+    tick_length = pos - start
+    if not tick_length:
+        return False
+
+    # search for closing ticks
+    match = re.search("`" * tick_length, state.src[pos + 1 :])
+    if not match:
+        return False
+    content = state.src[pos : pos + match.start() + 1].replace("\n", " ")
+
+    if not silent:
+        token = state.push("myst_role", "", 0)
+        token.meta = {"name": name}
+        token.content = content
+
+    state.pos = pos + match.end() + 1
+
+    return True
+
+
+def render_myst_role(self, tokens, idx, options, env):
+    token = tokens[idx]
+    name = token.meta.get("name", "unknown")
+    return (
+        '<code class="myst role">' f"{{{name}}}[{escapeHtml(token.content)}]" "</code>"
+    )
diff --git a/mdit_py_plugins/py.typed b/mdit_py_plugins/py.typed
new file mode 100644
index 0000000..7632ecf
--- /dev/null
+++ b/mdit_py_plugins/py.typed
@@ -0,0 +1 @@
+# Marker file for PEP 561
diff --git a/mdit_py_plugins/substitution.py b/mdit_py_plugins/substitution.py
new file mode 100644
index 0000000..bae120b
--- /dev/null
+++ b/mdit_py_plugins/substitution.py
@@ -0,0 +1,113 @@
+from markdown_it import MarkdownIt
+from markdown_it.rules_block import StateBlock
+from markdown_it.rules_inline import StateInline
+
+
+def substitution_plugin(
+    md: MarkdownIt, start_delimiter: str = "{", end_delimiter: str = "}"
+):
+    """A plugin to create substitution tokens.
+
+    These, token should be handled by the renderer.
+
+    Example::
+
+        {{ block }}
+
+        a {{ inline }} b
+
+    """
+
+    start_char = ord(start_delimiter)
+    end_char = ord(end_delimiter)
+
+    def _substitution_inline(state: StateInline, silent: bool):
+        try:
+            if (
+                state.srcCharCode[state.pos] != start_char
+                or state.srcCharCode[state.pos + 1] != start_char
+            ):
+                return False
+        except IndexError:
+            return False
+
+        pos = state.pos + 2
+        found_closing = False
+        while True:
+            try:
+                end = state.srcCharCode.index(end_char, pos)
+            except ValueError:
+                return False
+            try:
+                if state.srcCharCode[end + 1] == end_char:
+                    found_closing = True
+                    break
+            except IndexError:
+                return False
+            pos = end + 2
+
+        if not found_closing:
+            return False
+
+        text = state.src[state.pos + 2 : end].strip()
+        state.pos = end + 2
+
+        if silent:
+            return True
+
+        token = state.push("substitution_inline", "span", 0)
+        token.block = False
+        token.content = text
+        token.attrSet("class", "substitution")
+        token.attrSet("text", text)
+        token.markup = f"{start_delimiter}{end_delimiter}"
+
+        return True
+
+    def _substitution_block(
+        state: StateBlock, startLine: int, endLine: int, silent: bool
+    ):
+        startPos = state.bMarks[startLine] + state.tShift[startLine]
+        end = state.eMarks[startLine]
+
+        # if it's indented more than 3 spaces, it should be a code block
+        if state.sCount[startLine] - state.blkIndent >= 4:
+            return False
+
+        lineText = state.src[startPos:end].strip()
+
+        try:
+            if (
+                lineText[0] != start_delimiter
+                or lineText[1] != start_delimiter
+                or lineText[-1] != end_delimiter
+                or lineText[-2] != end_delimiter
+                or len(lineText) < 5
+            ):
+                return False
+        except IndexError:
+            return False
+
+        text = lineText[2:-2].strip()
+
+        # special case if multiple on same line, e.g. {{a}}{{b}}
+        if (end_delimiter * 2) in text:
+            return False
+
+        state.line = startLine + 1
+
+        if silent:
+            return True
+
+        token = state.push("substitution_block", "div", 0)
+        token.block = True
+        token.content = text
+        token.attrSet("class", "substitution")
+        token.attrSet("text", text)
+        token.markup = f"{start_delimiter}{end_delimiter}"
+        token.map = [startLine, state.line]
+
+        return True
+
+    md.block.ruler.before("fence", "substitution_block", _substitution_block)
+    md.inline.ruler.before("escape", "substitution_inline", _substitution_inline)
diff --git a/mdit_py_plugins/tasklists/__init__.py b/mdit_py_plugins/tasklists/__init__.py
new file mode 100644
index 0000000..40a6d67
--- /dev/null
+++ b/mdit_py_plugins/tasklists/__init__.py
@@ -0,0 +1,153 @@
+"""Builds task/todo lists out of markdown lists with items starting with [ ] or [x]"""
+
+# Ported by Wolmar Nyberg Åkerström from https://github.com/revin/markdown-it-task-lists
+# ISC License
+# Copyright (c) 2016, Revin Guillen
+#
+# Permission to use, copy, modify, and/or distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notice and this permission notice appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import re
+from typing import List
+from uuid import uuid4
+
+from markdown_it import MarkdownIt
+from markdown_it.token import Token
+
+# Regex string to match a whitespace character, as specified in
+# https://github.github.com/gfm/#whitespace-character
+# (spec version 0.29-gfm (2019-04-06))
+_GFM_WHITESPACE_RE = r"[ \t\n\v\f\r]"
+
+
+def tasklists_plugin(
+    md: MarkdownIt,
+    enabled: bool = False,
+    label: bool = False,
+    label_after: bool = False,
+):
+    """Plugin for building task/todo lists out of markdown lists with items starting with [ ] or [x]
+    .. Nothing else
+
+    For example::
+       - [ ] An item that needs doing
+       - [x] An item that is complete
+
+    The rendered HTML checkboxes are disabled; to change this, pass a truthy value into the enabled
+    property of the plugin options.
+
+    :param enabled: True enables the rendered checkboxes
+    :param label: True wraps the rendered list items in a <label> element for UX purposes,
+    :param label_after: True – adds the <label> element after the checkbox.
+    """
+    disable_checkboxes = not enabled
+    use_label_wrapper = label
+    use_label_after = label_after
+
+    def fcn(state):
+        tokens: List[Token] = state.tokens
+        for i in range(2, len(tokens) - 1):
+
+            if is_todo_item(tokens, i):
+                todoify(tokens[i], tokens[i].__class__)
+                tokens[i - 2].attrSet(
+                    "class",
+                    "task-list-item" + (" enabled" if not disable_checkboxes else ""),
+                )
+                tokens[parent_token(tokens, i - 2)].attrSet(
+                    "class", "contains-task-list"
+                )
+
+    md.core.ruler.after("inline", "github-tasklists", fcn)
+
+    def parent_token(tokens, index):
+        target_level = tokens[index].level - 1
+        for i in range(1, index + 1):
+            if tokens[index - i].level == target_level:
+                return index - i
+        return -1
+
+    def is_todo_item(tokens, index):
+        return (
+            is_inline(tokens[index])
+            and is_paragraph(tokens[index - 1])
+            and is_list_item(tokens[index - 2])
+            and starts_with_todo_markdown(tokens[index])
+        )
+
+    def todoify(token: Token, token_constructor):
+        assert token.children is not None
+        token.children.insert(0, make_checkbox(token, token_constructor))
+        token.children[1].content = token.children[1].content[3:]
+        token.content = token.content[3:]
+
+        if use_label_wrapper:
+            if use_label_after:
+                token.children.pop()
+
+                # Replaced number generator from original plugin with uuid.
+                checklist_id = f"task-item-{uuid4()}"
+                token.children[0].content = (
+                    token.children[0].content[0:-1] + f' id="{checklist_id}">'
+                )
+                token.children.append(
+                    after_label(token.content, checklist_id, token_constructor)
+                )
+            else:
+                token.children.insert(0, begin_label(token_constructor))
+                token.children.append(end_label(token_constructor))
+
+    def make_checkbox(token, token_constructor):
+        checkbox = token_constructor("html_inline", "", 0)
+        disabled_attr = 'disabled="disabled"' if disable_checkboxes else ""
+        if token.content.startswith("[ ] "):
+            checkbox.content = (
+                '<input class="task-list-item-checkbox" '
+                f'{disabled_attr} type="checkbox">'
+            )
+        elif token.content.startswith("[x] ") or token.content.startswith("[X] "):
+            checkbox.content = (
+                '<input class="task-list-item-checkbox" checked="checked" '
+                f'{disabled_attr} type="checkbox">'
+            )
+        return checkbox
+
+    def begin_label(token_constructor):
+        token = token_constructor("html_inline", "", 0)
+        token.content = "<label>"
+        return token
+
+    def end_label(token_constructor):
+        token = token_constructor("html_inline", "", 0)
+        token.content = "</label>"
+        return token
+
+    def after_label(content, checkbox_id, token_constructor):
+        token = token_constructor("html_inline", "", 0)
+        token.content = (
+            f'<label class="task-list-item-label" for="{checkbox_id}">{content}</label>'
+        )
+        token.attrs = [{"for": checkbox_id}]
+        return token
+
+    def is_inline(token):
+        return token.type == "inline"
+
+    def is_paragraph(token):
+        return token.type == "paragraph_open"
+
+    def is_list_item(token):
+        return token.type == "list_item_open"
+
+    def starts_with_todo_markdown(token):
+        # leading whitespace in a list item is already trimmed off by markdown-it
+        return re.match(rf"\[[ xX]]{_GFM_WHITESPACE_RE}+", token.content)
diff --git a/mdit_py_plugins/tasklists/port.yaml b/mdit_py_plugins/tasklists/port.yaml
new file mode 100644
index 0000000..4ad6da5
--- /dev/null
+++ b/mdit_py_plugins/tasklists/port.yaml
@@ -0,0 +1,6 @@
+- package: markdown-it-task-lists
+  commit: 8233e000559fae5a6306009e55332a54a9d3f606
+  date: 6 Mar 2018
+  version: 2.1.1
+  changes:
+    - Replaced number generator from original plugin with uuid
diff --git a/mdit_py_plugins/texmath/LICENSE b/mdit_py_plugins/texmath/LICENSE
new file mode 100644
index 0000000..b88387c
--- /dev/null
+++ b/mdit_py_plugins/texmath/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2013-17 Stefan Goessner
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/mdit_py_plugins/texmath/README.md b/mdit_py_plugins/texmath/README.md
new file mode 100644
index 0000000..f79f335
--- /dev/null
+++ b/mdit_py_plugins/texmath/README.md
@@ -0,0 +1,137 @@
+[![License](https://img.shields.io/github/license/goessner/markdown-it-texmath.svg)](https://github.com/goessner/markdown-it-texmath/blob/master/licence.txt)
+[![npm](https://img.shields.io/npm/v/markdown-it-texmath.svg)](https://www.npmjs.com/package/markdown-it-texmath)
+[![npm](https://img.shields.io/npm/dt/markdown-it-texmath.svg)](https://www.npmjs.com/package/markdown-it-texmath)
+
+# markdown-it-texmath
+
+Add TeX math equations to your Markdown documents rendered by [markdown-it](https://github.com/markdown-it/markdown-it) parser. [KaTeX](https://github.com/Khan/KaTeX) is used as a fast math renderer.
+
+## Features
+Simplify the process of authoring markdown documents containing math formulas.
+This extension is a comfortable tool for scientists, engineers and students with markdown as their first choice document format.
+
+* Macro support
+* Simple formula numbering
+* Inline math with tables, lists and blockquote.
+* User setting delimiters:
+  * `'dollars'` (default)
+    * inline: `$...$`
+    * display: `$$...$$`
+    * display + equation number: `$$...$$ (1)`
+  * `'brackets'`
+    * inline: `\(...\)`
+    * display: `\[...\]`
+    * display + equation number: `\[...\] (1)`
+  * `'gitlab'`
+    * inline: ``$`...`$``
+    * display: `` ```math ... ``` ``
+    * display + equation number: `` ```math ... ``` (1)``
+  * `'julia'`
+    * inline: `$...$`  or ``` ``...`` ```
+    * display: `` ```math ... ``` ``
+    * display + equation number: `` ```math ... ``` (1)``
+  * `'kramdown'`
+    * inline: ``$$...$$``
+    * display: `$$...$$`
+    * display + equation number: `$$...$$ (1)`
+
+## Show me
+
+View a [test table](https://goessner.github.io/markdown-it-texmath/index.html).
+
+[try it out ...](https://goessner.github.io/markdown-it-texmath/markdown-it-texmath-demo.html)
+
+## Use with `node.js`
+
+Install the extension. Verify having `markdown-it` and `katex` already installed .
+```
+npm install markdown-it-texmath
+```
+Use it with JavaScript.
+```js
+let kt = require('katex'),
+    tm = require('markdown-it-texmath').use(kt),
+    md = require('markdown-it')().use(tm,{delimiters:'dollars',macros:{"\\RR": "\\mathbb{R}"}});
+
+md.render('Euler\'s identity \(e^{i\pi}+1=0\) is a beautiful formula in $\\RR 2$.')
+```
+
+## Use in Browser
+```html
+<html>
+<head>
+  <meta charset='utf-8'>
+  <link rel="stylesheet" href="katex.min.css">
+  <link rel="stylesheet" href="texmath.css">
+  <script src="markdown-it.min.js"></script>
+  <script src="katex.min.js"></script>
+  <script src="texmath.js"></script>
+</head>
+<body>
+  <div id="out"></div>
+  <script>
+    let md;
+    document.addEventListener("DOMContentLoaded", () => {
+        const tm = texmath.use(katex);
+        md = markdownit().use(tm,{delimiters:'dollars',macros:{"\\RR": "\\mathbb{R}"}});
+        out.innerHTML = md.render('Euler\'s identity $e^{i\pi}+1=0$ is a beautiful formula in //RR 2.');
+    })
+  </script>
+</body>
+</html>
+```
+## CDN
+
+Use following links for `texmath.js` and `texmath.css`
+* `https://gitcdn.xyz/cdn/goessner/markdown-it-texmath/master/texmath.js`
+* `https://gitcdn.xyz/cdn/goessner/markdown-it-texmath/master/texmath.css`
+
+## Dependencies
+
+* [`markdown-it`](https://github.com/markdown-it/markdown-it): Markdown parser done right. Fast and easy to extend.
+* [`katex`](https://github.com/Khan/KaTeX): This is where credits for fast rendering TeX math in HTML go to.
+
+## ToDo
+
+ nothing yet
+
+## FAQ
+
+* __`markdown-it-texmath` with React Native does not work, why ?__
+  * `markdown-it-texmath` is using regular expressions with `y` [(sticky) property](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/sticky) and cannot avoid this. The use of the `y` flag in regular expressions means the plugin is not compatible with React Native (which as of now doesn't support it and throws an error `Invalid flags supplied to RegExp constructor`).
+
+## CHANGELOG
+
+###  [0.6.0] on October 04, 2019
+* Add support for [Julia Markdown](https://docs.julialang.org/en/v1/stdlib/Markdown/) on [request](https://github.com/goessner/markdown-it-texmath/issues/15).
+
+###  [0.5.5] on February 07, 2019
+* Remove [rendering bug with brackets delimiters](https://github.com/goessner/markdown-it-texmath/issues/9).
+
+###  [0.5.4] on January 20, 2019
+* Remove pathological [bug within blockquotes](https://github.com/goessner/mdmath/issues/50).
+
+###  [0.5.3] on November 11, 2018
+* Add support for Tex macros (https://katex.org/docs/supported.html#macros) .
+* Bug with [brackets delimiters](https://github.com/goessner/markdown-it-texmath/issues/9) .
+
+###  [0.5.2] on September 07, 2018
+* Add support for [Kramdown](https://kramdown.gettalong.org/) .
+
+###  [0.5.0] on August 15, 2018
+* Fatal blockquote bug investigated. Implemented workaround to vscode bug, which has finally gone with vscode 1.26.0 .
+
+###  [0.4.6] on January 05, 2018
+* Escaped underscore bug removed.
+
+###  [0.4.5] on November 06, 2017
+* Backslash bug removed.
+
+###  [0.4.4] on September 27, 2017
+* Modifying the `block` mode regular expression with `gitlab` delimiters, so removing the `newline` bug.
+
+## License
+
+`markdown-it-texmath` is licensed under the [MIT License](./license.txt)
+
+ © [Stefan Gössner](https://github.com/goessner)
diff --git a/mdit_py_plugins/texmath/__init__.py b/mdit_py_plugins/texmath/__init__.py
new file mode 100644
index 0000000..f0c2588
--- /dev/null
+++ b/mdit_py_plugins/texmath/__init__.py
@@ -0,0 +1 @@
+from .index import texmath_plugin  # noqa F401
diff --git a/mdit_py_plugins/texmath/index.py b/mdit_py_plugins/texmath/index.py
new file mode 100644
index 0000000..ecf178c
--- /dev/null
+++ b/mdit_py_plugins/texmath/index.py
@@ -0,0 +1,307 @@
+import re
+from typing import Optional
+
+from markdown_it import MarkdownIt
+from markdown_it.common.utils import charCodeAt
+
+
+def texmath_plugin(md: MarkdownIt, delimiters="dollars", macros: Optional[dict] = None):
+    """Plugin ported from
+    `markdown-it-texmath <https://github.com/goessner/markdown-it-texmath>`__.
+
+    It parses TeX math equations set inside opening and closing delimiters:
+
+    .. code-block:: md
+
+        $\\alpha = \\frac{1}{2}$
+
+    :param delimiters: one of: brackets, dollars, gitlab, julia, kramdown
+
+    """
+    macros = macros or {}
+
+    if delimiters in rules:
+        for rule_inline in rules[delimiters]["inline"]:
+            md.inline.ruler.before(
+                "escape", rule_inline["name"], make_inline_func(rule_inline)
+            )
+
+            def render_math_inline(self, tokens, idx, options, env):
+                return rule_inline["tmpl"].format(
+                    render(tokens[idx].content, False, macros)
+                )
+
+            md.add_render_rule(rule_inline["name"], render_math_inline)
+
+        for rule_block in rules[delimiters]["block"]:
+            md.block.ruler.before(
+                "fence", rule_block["name"], make_block_func(rule_block)
+            )
+
+            def render_math_block(self, tokens, idx, options, env):
+                return rule_block["tmpl"].format(
+                    render(tokens[idx].content, True, macros), tokens[idx].info
+                )
+
+            md.add_render_rule(rule_block["name"], render_math_block)
+
+
+def applyRule(rule, string: str, begin, inBlockquote):
+
+    if not (
+        string.startswith(rule["tag"], begin)
+        and (rule["pre"](string, begin) if "pre" in rule else True)
+    ):
+        return False
+
+    match = rule["rex"].match(string[begin:])  # type: re.Match
+
+    if not match or match.start() != 0:
+        return False
+
+    lastIndex = match.end() + begin - 1
+    if "post" in rule:
+        if not (
+            rule["post"](string, lastIndex)  # valid post-condition
+            # remove evil blockquote bug (https:#github.com/goessner/mdmath/issues/50)
+            and (not inBlockquote or "\n" not in match.group(1))
+        ):
+            return False
+    return match
+
+
+def make_inline_func(rule):
+    def _func(state, silent):
+        res = applyRule(rule, state.src, state.pos, False)
+        if res:
+            if not silent:
+                token = state.push(rule["name"], "math", 0)
+                token.content = res[1]  # group 1 from regex ..
+                token.markup = rule["tag"]
+
+            state.pos += res.end()
+
+        return bool(res)
+
+    return _func
+
+
+def make_block_func(rule):
+    def _func(state, begLine, endLine, silent):
+        begin = state.bMarks[begLine] + state.tShift[begLine]
+        res = applyRule(rule, state.src, begin, state.parentType == "blockquote")
+        if res:
+            if not silent:
+                token = state.push(rule["name"], "math", 0)
+                token.block = True
+                token.content = res[1]
+                token.info = res[len(res.groups())]
+                token.markup = rule["tag"]
+
+            line = begLine
+            endpos = begin + res.end() - 1
+
+            while line < endLine:
+                if endpos >= state.bMarks[line] and endpos <= state.eMarks[line]:
+                    # line for end of block math found ...
+                    state.line = line + 1
+                    break
+                line += 1
+
+            state.pos = begin + res.end()
+
+        return bool(res)
+
+    return _func
+
+
+def dollar_pre(str, beg):
+    prv = charCodeAt(str[beg - 1], 0) if beg > 0 else False
+    return (
+        (not prv) or prv != 0x5C and (prv < 0x30 or prv > 0x39)  # no backslash,
+    )  # no decimal digit .. before opening '$'
+
+
+def dollar_post(string, end):
+    try:
+        nxt = string[end + 1] and charCodeAt(string[end + 1], 0)
+    except IndexError:
+        return True
+    return (
+        (not nxt) or (nxt < 0x30) or (nxt > 0x39)
+    )  # no decimal digit .. after closing '$'
+
+
+def render(tex, displayMode, macros):
+    return tex
+    # TODO better HTML renderer port for math
+    # try:
+    #     res = katex.renderToString(tex,{throwOnError:False,displayMode,macros})
+    # except:
+    #     res = tex+": "+err.message.replace("<","&lt;")
+    # return res
+
+
+# def use(katex):  # math renderer used ...
+#     texmath.katex = katex;       # ... katex solely at current ...
+#     return texmath;
+# }
+
+
+# All regexes areg global (g) and sticky (y), see:
+# https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/sticky
+
+rules: dict = {
+    "brackets": {
+        "inline": [
+            {
+                "name": "math_inline",
+                "rex": re.compile(r"^\\\((.+?)\\\)", re.DOTALL),
+                "tmpl": "<eq>{0}</eq>",
+                "tag": "\\(",
+            }
+        ],
+        "block": [
+            {
+                "name": "math_block_eqno",
+                "rex": re.compile(
+                    r"^\\\[(((?!\\\]|\\\[)[\s\S])+?)\\\]\s*?\(([^)$\r\n]+?)\)", re.M
+                ),
+                "tmpl": '<section class="eqno"><eqn>{0}</eqn><span>({1})</span></section>',
+                "tag": "\\[",
+            },
+            {
+                "name": "math_block",
+                "rex": re.compile(r"^\\\[([\s\S]+?)\\\]", re.M),
+                "tmpl": "<section>\n<eqn>{0}</eqn>\n</section>\n",
+                "tag": "\\[",
+            },
+        ],
+    },
+    "gitlab": {
+        "inline": [
+            {
+                "name": "math_inline",
+                "rex": re.compile(r"^\$`(.+?)`\$"),
+                "tmpl": "<eq>{0}</eq>",
+                "tag": "$`",
+            }
+        ],
+        "block": [
+            {
+                "name": "math_block_eqno",
+                "rex": re.compile(
+                    r"^`{3}math\s+?([^`]+?)\s+?`{3}\s*?\(([^)$\r\n]+?)\)", re.M
+                ),
+                "tmpl": '<section class="eqno">\n<eqn>{0}</eqn><span>({1})</span>\n</section>\n',  # noqa: E501
+                "tag": "```math",
+            },
+            {
+                "name": "math_block",
+                "rex": re.compile(r"^`{3}math\s+?([^`]+?)\s+?`{3}", re.M),
+                "tmpl": "<section>\n<eqn>{0}</eqn>\n</section>\n",
+                "tag": "```math",
+            },
+        ],
+    },
+    "julia": {
+        "inline": [
+            {
+                "name": "math_inline",
+                "rex": re.compile(r"^`{2}([^`]+?)`{2}"),
+                "tmpl": "<eq>{0}</eq>",
+                "tag": "``",
+            },
+            {
+                "name": "math_inline",
+                "rex": re.compile(r"^\$(\S[^$\r\n]*?[^\s\\]{1}?)\$"),
+                "tmpl": "<eq>{0}</eq>",
+                "tag": "$",
+                "pre": dollar_pre,
+                "post": dollar_post,
+            },
+            {
+                "name": "math_single",
+                "rex": re.compile(r"^\$([^$\s\\]{1}?)\$"),
+                "tmpl": "<eq>{0}</eq>",
+                "tag": "$",
+                "pre": dollar_pre,
+                "post": dollar_post,
+            },
+        ],
+        "block": [
+            {
+                "name": "math_block_eqno",
+                "rex": re.compile(
+                    r"^`{3}math\s+?([^`]+?)\s+?`{3}\s*?\(([^)$\r\n]+?)\)", re.M
+                ),
+                "tmpl": '<section class="eqno"><eqn>{0}</eqn><span>({1})</span></section>',
+                "tag": "```math",
+            },
+            {
+                "name": "math_block",
+                "rex": re.compile(r"^`{3}math\s+?([^`]+?)\s+?`{3}", re.M),
+                "tmpl": "<section><eqn>{0}</eqn></section>",
+                "tag": "```math",
+            },
+        ],
+    },
+    "kramdown": {
+        "inline": [
+            {
+                "name": "math_inline",
+                "rex": re.compile(r"^\${2}([^$\r\n]*?)\${2}"),
+                "tmpl": "<eq>{0}</eq>",
+                "tag": "$$",
+            }
+        ],
+        "block": [
+            {
+                "name": "math_block_eqno",
+                "rex": re.compile(r"^\${2}([^$]*?)\${2}\s*?\(([^)$\r\n]+?)\)", re.M),
+                "tmpl": '<section class="eqno"><eqn>{0}</eqn><span>({1})</span></section>',
+                "tag": "$$",
+            },
+            {
+                "name": "math_block",
+                "rex": re.compile(r"^\${2}([^$]*?)\${2}", re.M),
+                "tmpl": "<section><eqn>{0}</eqn></section>",
+                "tag": "$$",
+            },
+        ],
+    },
+    "dollars": {
+        "inline": [
+            {
+                "name": "math_inline",
+                "rex": re.compile(r"^\$(\S[^$]*?[^\s\\]{1}?)\$"),
+                "tmpl": "<eq>{0}</eq>",
+                "tag": "$",
+                "pre": dollar_pre,
+                "post": dollar_post,
+            },
+            {
+                "name": "math_single",
+                "rex": re.compile(r"^\$([^$\s\\]{1}?)\$"),
+                "tmpl": "<eq>{0}</eq>",
+                "tag": "$",
+                "pre": dollar_pre,
+                "post": dollar_post,
+            },
+        ],
+        "block": [
+            {
+                "name": "math_block_eqno",
+                "rex": re.compile(r"^\${2}([^$]*?)\${2}\s*?\(([^)$\r\n]+?)\)", re.M),
+                "tmpl": '<section class="eqno">\n<eqn>{0}</eqn><span>({1})</span>\n</section>\n',  # noqa: E501
+                "tag": "$$",
+            },
+            {
+                "name": "math_block",
+                "rex": re.compile(r"^\${2}([^$]*?)\${2}", re.M),
+                "tmpl": "<section>\n<eqn>{0}</eqn>\n</section>\n",
+                "tag": "$$",
+            },
+        ],
+    },
+}
diff --git a/mdit_py_plugins/texmath/port.yaml b/mdit_py_plugins/texmath/port.yaml
new file mode 100644
index 0000000..ba47ac8
--- /dev/null
+++ b/mdit_py_plugins/texmath/port.yaml
@@ -0,0 +1,7 @@
+- package: markdown-it-texmath
+  commit: 78c548829ce2ef85c73dc71e680d01e5ae41ffbf
+  date: Oct 4, 2019
+  version: 0.6
+  changes: |
+    both dollars/math_inline and brackets/math_inline regexes have been changed,
+    to allow (single) line breaks
diff --git a/mdit_py_plugins/wordcount/__init__.py b/mdit_py_plugins/wordcount/__init__.py
new file mode 100644
index 0000000..577eeda
--- /dev/null
+++ b/mdit_py_plugins/wordcount/__init__.py
@@ -0,0 +1,58 @@
+import string
+from typing import Callable, List
+
+from markdown_it import MarkdownIt
+from markdown_it.rules_core import StateCore
+
+
+def basic_count(text: str) -> int:
+    """Split the string and ignore punctuation only elements."""
+    return sum([el.strip(string.punctuation).isalpha() for el in text.split()])
+
+
+def wordcount_plugin(
+    md: MarkdownIt,
+    *,
+    per_minute: int = 200,
+    count_func: Callable[[str], int] = basic_count,
+    store_text: bool = False
+):
+    """Plugin for computing and storing the word count.
+
+    Stores in the ``env`` e.g.::
+
+        env["wordcount"] = {
+          "words": 200
+          "minutes": 1,
+        }
+
+    If "wordcount" is already in the env, it will update it.
+
+    :param per_minute: Words per minute reading speed
+    :param store_text: store all text under a "text" key, as a list of strings
+    """
+
+    def _word_count_rule(state: StateCore) -> None:
+        text: List[str] = []
+        words = 0
+        for token in state.tokens:
+            if token.type == "text":
+                words += count_func(token.content)
+                if store_text:
+                    text.append(token.content)
+            elif token.type == "inline":
+                for child in token.children or ():
+                    if child.type == "text":
+                        words += count_func(child.content)
+                        if store_text:
+                            text.append(child.content)
+
+        data = state.env.setdefault("wordcount", {})
+        if store_text:
+            data.setdefault("text", [])
+            data["text"] += text
+        data.setdefault("words", 0)
+        data["words"] += words
+        data["minutes"] = int(round(data["words"] / per_minute))
+
+    md.core.ruler.push("wordcount", _word_count_rule)
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..5613bca
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,67 @@
+[build-system]
+requires = ["flit_core >=3.4,<4"]
+build-backend = "flit_core.buildapi"
+
+[project]
+name = "mdit-py-plugins"
+dynamic = ["version"]
+description = "Collection of plugins for markdown-it-py"
+readme = "README.md"
+authors = [{name = "Chris Sewell", email = "chrisj_sewell@hotmail.com"}]
+license = {file = "LICENSE"}
+classifiers = [
+    "Development Status :: 5 - Production/Stable",
+    "Intended Audience :: Developers",
+    "License :: OSI Approved :: MIT License",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.7",
+    "Programming Language :: Python :: 3.8",
+    "Programming Language :: Python :: 3.9",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: Implementation :: CPython",
+    "Programming Language :: Python :: Implementation :: PyPy",
+    "Topic :: Software Development :: Libraries :: Python Modules",
+    "Topic :: Text Processing :: Markup",
+]
+keywords = ["markdown", "markdown-it", "lexer", "parser", "development"]
+requires-python = ">=3.7"
+dependencies = ["markdown-it-py>=1.0.0,<3.0.0"]
+
+[project.urls]
+Homepage = "https://github.com/executablebooks/mdit-py-plugins"
+Documentation = "https://markdown-it-py.readthedocs.io"
+
+[project.optional-dependencies]
+code_style = ["pre-commit"]
+testing = [
+    "coverage",
+    "pytest",
+    "pytest-cov",
+    "pytest-regressions",
+]
+rtd = [
+    "attrs",
+    "myst-parser~=0.16.1",
+    "sphinx-book-theme~=0.1.0",
+]
+
+[tool.flit.module]
+name = "mdit_py_plugins"
+
+[tool.flit.sdist]
+exclude = [
+    "docs/",
+    "tests/",
+]
+
+[tool.isort]
+profile = "black"
+force_sort_within_sections = true
+known_first_party = ["mdit_py_plugins", "tests"]
+
+[tool.mypy]
+show_error_codes = true
+warn_unused_ignores = true
+warn_redundant_casts = true
+no_implicit_optional = true
+strict_equality = true
diff --git a/tests/fixtures/admon.md b/tests/fixtures/admon.md
new file mode 100644
index 0000000..587ae80
--- /dev/null
+++ b/tests/fixtures/admon.md
@@ -0,0 +1,269 @@
+
+Simple admonition
+.
+!!! note
+    *content*
+.
+<div class="admonition note">
+<p class="admonition-title">Note</p>
+<p><em>content</em></p>
+</div>
+.
+
+
+Could contain block elements too
+.
+!!! note
+    ### heading
+
+    -----------
+
+.
+<div class="admonition note">
+<p class="admonition-title">Note</p>
+<h3>heading</h3>
+<hr>
+</div>
+.
+
+
+Shows custom title
+.
+!!! note Custom title
+
+    Some text
+
+.
+<div class="admonition note">
+<p class="admonition-title">Custom title</p>
+<p>Some text</p>
+</div>
+.
+
+
+Shows no title
+.
+!!! note ""
+    Some text
+
+.
+<div class="admonition note">
+<p>Some text</p>
+</div>
+.
+
+
+Closes block after 2 empty lines
+.
+!!! note 
+    Some text
+
+
+    A code block
+.
+<div class="admonition note">
+<p class="admonition-title">Note</p>
+<p>Some text</p>
+</div>
+<pre><code>A code block
+</code></pre>
+.
+
+
+Nested blocks
+.
+!!! note
+    !!! note
+        Some text
+            
+            code block
+.
+<div class="admonition note">
+<p class="admonition-title">Note</p>
+<div class="admonition note">
+<p class="admonition-title">Note</p>
+<p>Some text</p>
+<pre><code>code block
+</code></pre>
+</div>
+</div>
+.
+
+
+Consecutive admonitions
+.
+!!! note
+
+!!! warning
+.
+<div class="admonition note">
+<p class="admonition-title">Note</p>
+</div>
+<div class="admonition warning">
+<p class="admonition-title">Warning</p>
+</div>
+.
+
+
+Marker may be indented up to 3 chars
+.
+   !!! note
+       content
+.
+<div class="admonition note">
+<p class="admonition-title">Note</p>
+<p>content</p>
+</div>
+.
+
+
+But that's a code block
+.
+    !!! note
+        content
+.
+<pre><code>!!! note
+    content
+</code></pre>
+.
+
+
+Some more indent checks
+.
+  !!! note
+   not a code block
+
+    code block
+.
+<div class="admonition note">
+<p class="admonition-title">Note</p>
+</div>
+<p>not a code block</p>
+<pre><code>code block
+</code></pre>
+.
+
+
+Type could be adjacent to marker 
+.
+!!!note
+   xxx
+
+.
+<div class="admonition note">
+<p class="admonition-title">Note</p>
+<p>xxx</p>
+</div>
+.
+
+
+Type could be adjacent to marker and content may be shifted up to 3 chars
+.
+!!!note
+      xxx
+
+.
+<div class="admonition note">
+<p class="admonition-title">Note</p>
+<p>xxx</p>
+</div>
+.
+
+
+Or several spaces apart
+.
+!!!     note
+        xxx
+.
+<div class="admonition note">
+<p class="admonition-title">Note</p>
+<p>xxx</p>
+</div>
+.
+
+
+Admonitions self-close at the end of the document
+.
+!!! note
+    xxx
+.
+<div class="admonition note">
+<p class="admonition-title">Note</p>
+<p>xxx</p>
+</div>
+.
+
+
+They could be nested in lists
+.
+- !!! note
+      - a
+      - b
+- !!! warning
+      - c
+      - d
+.
+<ul>
+<li>
+<div class="admonition note">
+<p class="admonition-title">Note</p>
+<ul>
+<li>a</li>
+<li>b</li>
+</ul>
+</div>
+</li>
+<li>
+<div class="admonition warning">
+<p class="admonition-title">Warning</p>
+<ul>
+<li>c</li>
+<li>d</li>
+</ul>
+</div>
+</li>
+</ul>
+.
+
+
+Or in blockquotes
+.
+> !!! note
+>     xxx
+>     > yyy
+>     zzz
+>
+.
+<blockquote>
+<div class="admonition note">
+<p class="admonition-title">Note</p>
+<p>xxx</p>
+<blockquote>
+<p>yyy
+zzz</p>
+</blockquote>
+</div>
+</blockquote>
+.
+
+
+Renders unknown admonition type 
+.
+!!! unknown title
+    content
+.
+<div class="admonition unknown">
+<p class="admonition-title">title</p>
+<p>content</p>
+</div>
+.
+
+
+Does not render
+.
+!!!
+    content
+.
+<p>!!!
+content</p>
+.
diff --git a/tests/fixtures/amsmath.md b/tests/fixtures/amsmath.md
new file mode 100644
index 0000000..ba21544
--- /dev/null
+++ b/tests/fixtures/amsmath.md
@@ -0,0 +1,223 @@
+equation environment:
+.
+\begin{equation}
+a = 1
+\end{equation}
+.
+<div class="math amsmath">
+\begin{equation}
+a = 1
+\end{equation}
+</div>
+.
+
+equation* environment:
+.
+\begin{equation*}
+a = 1
+\end{equation*}
+.
+<div class="math amsmath">
+\begin{equation*}
+a = 1
+\end{equation*}
+</div>
+.
+
+multline environment:
+.
+\begin{multline}
+a = 1
+\end{multline}
+.
+<div class="math amsmath">
+\begin{multline}
+a = 1
+\end{multline}
+</div>
+.
+
+multline* environment:
+.
+\begin{multline*}
+a = 1
+\end{multline*}
+.
+<div class="math amsmath">
+\begin{multline*}
+a = 1
+\end{multline*}
+</div>
+.
+
+gather environment:
+.
+\begin{gather}
+a = 1
+\end{gather}
+.
+<div class="math amsmath">
+\begin{gather}
+a = 1
+\end{gather}
+</div>
+.
+
+gather* environment:
+.
+\begin{gather*}
+a = 1
+\end{gather*}
+.
+<div class="math amsmath">
+\begin{gather*}
+a = 1
+\end{gather*}
+</div>
+.
+
+align environment:
+.
+\begin{align}
+a = 1
+\end{align}
+.
+<div class="math amsmath">
+\begin{align}
+a = 1
+\end{align}
+</div>
+.
+
+align* environment:
+.
+\begin{align*}
+a = 1
+\end{align*}
+.
+<div class="math amsmath">
+\begin{align*}
+a = 1
+\end{align*}
+</div>
+.
+
+alignat environment:
+.
+\begin{alignat}
+a = 1
+\end{alignat}
+.
+<div class="math amsmath">
+\begin{alignat}
+a = 1
+\end{alignat}
+</div>
+.
+
+alignat* environment:
+.
+\begin{alignat*}
+a = 1
+\end{alignat*}
+.
+<div class="math amsmath">
+\begin{alignat*}
+a = 1
+\end{alignat*}
+</div>
+.
+
+flalign environment:
+.
+\begin{flalign}
+a = 1
+\end{flalign}
+.
+<div class="math amsmath">
+\begin{flalign}
+a = 1
+\end{flalign}
+</div>
+.
+
+flalign* environment:
+.
+\begin{flalign*}
+a = 1
+\end{flalign*}
+.
+<div class="math amsmath">
+\begin{flalign*}
+a = 1
+\end{flalign*}
+</div>
+.
+
+equation environment, with before/after paragraphs:
+.
+before
+\begin{equation}
+a = 1
+\end{equation}
+after
+.
+<p>before</p>
+<div class="math amsmath">
+\begin{equation}
+a = 1
+\end{equation}
+</div>
+<p>after</p>
+.
+
+equation environment, in list:
+.
+- \begin{equation}
+  a = 1
+  \end{equation}
+.
+<ul>
+<li>
+<div class="math amsmath">
+\begin{equation}
+  a = 1
+  \end{equation}
+</div>
+</li>
+</ul>
+.
+
+`alignat` environment and HTML escaping
+.
+\begin{alignat}{3}
+    & d   = \frac{1}{1 + 0.2316419x}  \quad && a_1  = 0.31938153   \quad && a_2 = -0.356563782 \\
+    & a_3 = 1.781477937               \quad && a_4  = -1.821255978 \quad && a_5 = 1.330274429
+\end{alignat}
+.
+<div class="math amsmath">
+\begin{alignat}{3}
+    &amp; d   = \frac{1}{1 + 0.2316419x}  \quad &amp;&amp; a_1  = 0.31938153   \quad &amp;&amp; a_2 = -0.356563782 \\
+    &amp; a_3 = 1.781477937               \quad &amp;&amp; a_4  = -1.821255978 \quad &amp;&amp; a_5 = 1.330274429
+\end{alignat}
+</div>
+.
+
+`alignat*` environment and HTML escaping
+.
+\begin{alignat*}{3}
+& m   \quad && \text{módulo}            \quad && m>0\\
+& a   \quad && \text{multiplicador}     \quad && 0<a<m\\
+& c   \quad && \text{constante aditiva} \quad && 0\leq c<m\\
+& x_0 \quad && \text{valor inicial}     \quad && 0\leq x_0 <m
+\end{alignat*}
+.
+<div class="math amsmath">
+\begin{alignat*}{3}
+&amp; m   \quad &amp;&amp; \text{módulo}            \quad &amp;&amp; m&gt;0\\
+&amp; a   \quad &amp;&amp; \text{multiplicador}     \quad &amp;&amp; 0&lt;a&lt;m\\
+&amp; c   \quad &amp;&amp; \text{constante aditiva} \quad &amp;&amp; 0\leq c&lt;m\\
+&amp; x_0 \quad &amp;&amp; \text{valor inicial}     \quad &amp;&amp; 0\leq x_0 &lt;m
+\end{alignat*}
+</div>
+.
\ No newline at end of file
diff --git a/tests/fixtures/anchors.md b/tests/fixtures/anchors.md
new file mode 100644
index 0000000..bd96d1f
--- /dev/null
+++ b/tests/fixtures/anchors.md
@@ -0,0 +1,65 @@
+basic (max level 2):
+.
+# H1
+
+## H2
+
+### H3
+.
+<h1 id="h1">H1</h1>
+<h2 id="h2">H2</h2>
+<h3>H3</h3>
+.
+
+space:
+.
+# a b  c
+.
+<h1 id="a-b--c">a b  c</h1>
+.
+
+characters:
+.
+# a,b\cβÊ
+.
+<h1 id="abcβê">a,b\cβÊ</h1>
+.
+
+emoji:
+.
+# 🚀a
+.
+<h1 id="a">🚀a</h1>
+.
+
+html entity:
+.
+# foo&amp;bar
+.
+<h1 id="foobar">foo&amp;bar</h1>
+.
+
+uniqueness:
+.
+# a
+# a
+## a
+.
+<h1 id="a">a</h1>
+<h1 id="a-1">a</h1>
+<h2 id="a-2">a</h2>
+.
+
+standard (permalink after):
+.
+# a
+.
+<h1 id="a">a <a class="header-anchor" href="#a">¶</a></h1>
+.
+
+standard (permalink before):
+.
+# a
+.
+<h1 id="a"><a class="header-anchor" href="#a">¶</a> a</h1>
+.
diff --git a/tests/fixtures/attrs.md b/tests/fixtures/attrs.md
new file mode 100644
index 0000000..75b86aa
--- /dev/null
+++ b/tests/fixtures/attrs.md
@@ -0,0 +1,169 @@
+simple reference link
+.
+[text *emphasis*](a){#id .a}
+.
+<p><a href="a" id="id" class="a">text <em>emphasis</em></a></p>
+.
+
+simple definition link
+.
+[a][]{#id .b}
+
+[a]: /url
+.
+<p><a href="/url" id="id" class="b">a</a></p>
+.
+
+simple image
+.
+![a](b){#id .a b=c}
+.
+<p><img src="b" alt="a" id="id" b="c" class="a"></p>
+.
+
+simple inline code
+.
+`a`{#id .a b=c}
+.
+<p><code id="id" b="c" class="a">a</code></p>
+.
+
+ignore if space
+.
+![a](b) {#id key="*"}
+.
+<p><img src="b" alt="a"> {#id key=&quot;*&quot;}</p>
+.
+
+ignore if text
+.
+![a](b)b{#id key="*"}
+.
+<p><img src="b" alt="a">b{#id key=&quot;*&quot;}</p>
+.
+
+multi-line
+.
+![a](b){
+    #id .a
+    b=c
+    }
+more
+.
+<p><img src="b" alt="a" id="id" b="c" class="a">
+more</p>
+.
+
+merging attributes
+.
+![a](b){#a .a}{.b class=x other=h}{#x class="x g" other=a}
+.
+<p><img src="b" alt="a" id="x" class="a b x x g" other="a"></p>
+.
+
+spans: simple
+.
+[a]{#id .b}c
+.
+<p><span id="id" class="b">a</span>c</p>
+.
+
+spans: end of inline before attrs
+.
+[a]
+.
+<p>[a]</p>
+.
+
+spans: space between brace and attrs
+.
+[a] {.b}
+.
+<p>[a] {.b}</p>
+.
+
+spans: escaped span start
+.
+\[a]{.b}
+.
+<p>[a]{.b}</p>
+.
+
+spans: escaped span end
+.
+[a\]{.b}
+.
+<p>[a]{.b}</p>
+.
+
+spans: escaped span attribute
+.
+[a]\{.b}
+.
+<p>[a]{.b}</p>
+.
+
+spans: nested text syntax
+.
+[*a*]{.b}c
+.
+<p><span class="b"><em>a</em></span>c</p>
+.
+
+spans: nested span
+.
+*[a]{.b}c*
+.
+<p><em><span class="b">a</span>c</em></p>
+.
+
+spans: multi-line
+.
+x [a
+b]{#id
+b=c} y
+.
+<p>x <span id="id" b="c">a
+b</span> y</p>
+.
+
+spans: nested spans
+.
+[[a]{.b}]{.c}
+.
+<p><span class="c"><span class="b">a</span></span></p>
+.
+
+spans: short link takes precedence over span
+.
+[a]{#id .b}
+
+[a]: /url
+.
+<p><a href="/url" id="id" class="b">a</a></p>
+.
+
+spans: long link takes precedence over span
+.
+[a][a]{#id .b}
+
+[a]: /url
+.
+<p><a href="/url" id="id" class="b">a</a></p>
+.
+
+spans: link inside span
+.
+[[a]]{#id .b}
+
+[a]: /url
+.
+<p><span id="id" class="b"><a href="/url">a</a></span></p>
+.
+
+spans: merge attributes
+.
+[a]{#a .a}{#b .a .b other=c}{other=d}
+.
+<p><span id="b" class="a b" other="d">a</span></p>
+.
diff --git a/tests/fixtures/colon_fence.md b/tests/fixtures/colon_fence.md
new file mode 100644
index 0000000..b04e0e2
--- /dev/null
+++ b/tests/fixtures/colon_fence.md
@@ -0,0 +1,423 @@
+# The initial tests  are adapted from the test for normal code fences in tests/test_port/fixtures/commonmark_spec.md
+
+src line: 1638
+
+.
+:::
+<
+ >
+:::
+.
+<pre><code>&lt;
+ &gt;
+</code></pre>
+.
+
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+src line: 1665
+
+.
+::
+foo
+::
+.
+<p>::
+foo
+::</p>
+.
+
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+src line: 1676
+
+.
+:::
+aaa
+~~~
+:::
+.
+<pre><code>aaa
+~~~
+</code></pre>
+.
+
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+src line: 1688
+
+.
+:::
+aaa
+```
+:::
+.
+<pre><code>aaa
+```
+</code></pre>
+.
+
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+src line: 1702
+
+.
+::::
+aaa
+:::
+::::::
+.
+<pre><code>aaa
+:::
+</code></pre>
+.
+
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+src line: 1729
+
+.
+:::
+.
+<pre><code></code></pre>
+.
+
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+src line: 1736
+
+.
+:::::
+
+:::
+aaa
+.
+<pre><code>
+:::
+aaa
+</code></pre>
+.
+
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+src line: 1749
+
+.
+> :::
+> aaa
+
+bbb
+.
+<blockquote>
+<pre><code>aaa
+</code></pre>
+</blockquote>
+<p>bbb</p>
+.
+
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+src line: 1765
+
+.
+:::
+
+  
+:::
+.
+<pre><code>
+  
+</code></pre>
+.
+
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+src line: 1779
+
+.
+:::
+:::
+.
+<pre><code></code></pre>
+.
+
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+src line: 1791
+
+.
+ :::
+ aaa
+aaa
+:::
+.
+<pre><code>aaa
+aaa
+</code></pre>
+.
+
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+src line: 1803
+
+.
+  :::
+aaa
+  aaa
+aaa
+  :::
+.
+<pre><code>aaa
+aaa
+aaa
+</code></pre>
+.
+
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+src line: 1817
+
+.
+   :::
+   aaa
+    aaa
+  aaa
+   :::
+.
+<pre><code>aaa
+ aaa
+aaa
+</code></pre>
+.
+
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+src line: 1833
+
+.
+    :::
+    aaa
+    :::
+.
+<pre><code>:::
+aaa
+:::
+</code></pre>
+.
+
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+src line: 1848
+
+.
+:::
+aaa
+  :::
+.
+<pre><code>aaa
+</code></pre>
+.
+
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+src line: 1858
+
+.
+   :::
+aaa
+  :::
+.
+<pre><code>aaa
+</code></pre>
+.
+
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+src line: 1870
+
+.
+:::
+aaa
+    :::
+.
+<pre><code>aaa
+    :::
+</code></pre>
+.
+
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+src line: 1884
+
+.
+::: :::
+aaa
+.
+<pre><code class="block-:::" >aaa
+</code></pre>
+.
+
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+src line: 1907
+
+.
+foo
+:::
+bar
+:::
+baz
+.
+<p>foo</p>
+<pre><code>bar
+</code></pre>
+<p>baz</p>
+.
+
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+src line: 1946
+
+.
+:::ruby
+def foo(x)
+  return 3
+end
+:::
+.
+<pre><code class="block-ruby" >def foo(x)
+  return 3
+end
+</code></pre>
+.
+
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+src line: 1974
+
+.
+::::;
+::::
+.
+<pre><code class="block-;" ></code></pre>
+.
+
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+src line: 1984
+
+.
+::: aa :::
+foo
+.
+<pre><code class="block-aa" >foo
+</code></pre>
+.
+
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+src line: 2007
+
+.
+:::
+::: aaa
+:::
+.
+<pre><code>::: aaa
+</code></pre>
+.
+
+
+
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+src line: 2007
+
+.
+:::
+::: aaa
+:::
+.
+<pre><code>::: aaa
+</code></pre>
+.
+
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+Ending marker could be longer
+.
+::::: name :::::
+  hello world
+::::::::::::::::
+.
+<pre><code class="block-name" >  hello world
+</code></pre>
+.
+
+Nested blocks
+.
+::::: name
+:::: name
+xxx
+::::
+:::::
+.
+<pre><code class="block-name" >:::: name
+xxx
+::::
+</code></pre>
+.
+
+Name could be adjacent to marker
+.
+:::name
+xxx
+:::
+.
+<pre><code class="block-name" >xxx
+</code></pre>
+.
+
+They should terminate paragraphs
+.
+blah blah
+::: name
+content
+:::
+.
+<p>blah blah</p>
+<pre><code class="block-name" >content
+</code></pre>
+.
+
+They could be nested in lists
+.
+ -  ::: name
+    - xxx
+    :::
+.
+<ul>
+<li>
+<pre><code class="block-name" >- xxx
+</code></pre>
+</li>
+</ul>
+.
+
+Or in blockquotes
+.
+> ::: name
+> xxx
+>> yyy
+> zzz
+> :::
+.
+<blockquote>
+<pre><code class="block-name" >xxx
+&gt; yyy
+zzz
+</code></pre>
+</blockquote>
+.
+
+List indentation quirks
+.
+ -  ::: name
+    xxx
+    yyy
+   :::
+
+ -  ::: name
+    xxx
+   yyy
+   :::
+.
+<ul>
+<li>
+<pre><code class="block-name" >xxx
+yyy
+</code></pre>
+</li>
+</ul>
+<pre><code>
+-  ::: name
+ xxx
+yyy
+</code></pre>
+.
diff --git a/tests/fixtures/container.md b/tests/fixtures/container.md
new file mode 100644
index 0000000..9475b6a
--- /dev/null
+++ b/tests/fixtures/container.md
@@ -0,0 +1,286 @@
+
+Simple container
+.
+::: name
+*content*
+:::
+.
+<div class="name">
+<p><em>content</em></p>
+</div>
+.
+
+Delimiters too short
+.
+:: name
+*content*
+::
+.
+<p>:: name
+<em>content</em>
+::</p>
+.
+
+
+Could contain block elements too
+.
+::: name
+### heading
+
+-----------
+:::
+.
+<div class="name">
+<h3>heading</h3>
+<hr>
+</div>
+.
+
+
+Ending marker could be longer
+.
+::::: name :::::
+  hello world
+::::::::::::::::
+.
+<div class="name">
+<p>hello world</p>
+</div>
+.
+
+
+Nested blocks
+.
+::::: name
+:::: name
+xxx
+::::
+:::::
+.
+<div class="name">
+<div class="name">
+<p>xxx</p>
+</div>
+</div>
+.
+
+
+Incorrectly nested blocks
+.
+:::: name
+this block is closed with 5 markers below
+
+::::: name
+auto-closed block
+
+:::::
+::::
+.
+<div class="name">
+<p>this block is closed with 5 markers below</p>
+<div class="name">
+<p>auto-closed block</p>
+</div>
+</div>
+<p>::::</p>
+.
+
+
+Marker could be indented up to 3 spaces
+.
+   ::: name
+   content
+    :::
+   :::
+.
+<div class="name">
+<p>content
+:::</p>
+</div>
+.
+
+
+But that's a code block
+.
+    ::: name
+    content
+    :::
+.
+<pre><code>::: name
+content
+:::
+</code></pre>
+.
+
+
+Some more indent checks
+.
+  ::: name
+   not a code block
+
+    code block
+  :::
+.
+<div class="name">
+<p>not a code block</p>
+<pre><code>code block
+</code></pre>
+</div>
+.
+
+
+Name could be adjacent to marker
+.
+:::name
+xxx
+:::
+.
+<div class="name">
+<p>xxx</p>
+</div>
+.
+
+
+Or several spaces apart
+.
+:::    name
+xxx
+:::
+.
+<div class="name">
+<p>xxx</p>
+</div>
+.
+
+
+It could contain params
+.
+::: name arg=123 foo=456
+xxx
+:::
+.
+<div class="name">
+<p>xxx</p>
+</div>
+.
+
+
+But closing marker can't
+.
+::: name
+xxx
+::: arg=123
+.
+<div class="name">
+<p>xxx
+::: arg=123</p>
+</div>
+.
+
+
+This however isn't a valid one
+.
+::: namename
+xxx
+:::
+.
+<p>::: namename
+xxx
+:::</p>
+.
+
+
+Containers self-close at the end of the document
+.
+::: name
+xxx
+.
+<div class="name">
+<p>xxx</p>
+</div>
+.
+
+
+They should terminate paragraphs
+.
+blah blah
+::: name
+content
+:::
+.
+<p>blah blah</p>
+<div class="name">
+<p>content</p>
+</div>
+.
+
+
+They could be nested in lists
+.
+ -  ::: name
+    - xxx
+    :::
+.
+<ul>
+<li>
+<div class="name">
+<ul>
+<li>xxx</li>
+</ul>
+</div>
+</li>
+</ul>
+.
+
+
+Or in blockquotes
+.
+> ::: name
+> xxx
+>> yyy
+> zzz
+> :::
+.
+<blockquote>
+<div class="name">
+<p>xxx</p>
+<blockquote>
+<p>yyy
+zzz</p>
+</blockquote>
+</div>
+</blockquote>
+.
+
+
+List indentation quirks
+.
+ -  ::: name
+    xxx
+    yyy
+   :::
+
+ -  ::: name
+    xxx
+   yyy
+   :::
+.
+<ul>
+<li>
+<div class="name">
+<p>xxx
+yyy</p>
+</div>
+</li>
+</ul>
+<p>:::</p>
+<ul>
+<li>
+<div class="name">
+<p>xxx</p>
+</div>
+</li>
+</ul>
+<p>yyy
+:::</p>
+.
diff --git a/tests/fixtures/deflist.md b/tests/fixtures/deflist.md
new file mode 100644
index 0000000..a32952d
--- /dev/null
+++ b/tests/fixtures/deflist.md
@@ -0,0 +1,247 @@
+
+Pandoc (with slightly changed indents):
+
+.
+Term 1
+
+: Definition 1
+
+Term 2 with *inline markup*
+
+: Definition 2
+
+      { some code, part of Definition 2 }
+
+  Third paragraph of definition 2.
+.
+<dl>
+<dt>Term 1</dt>
+<dd>
+<p>Definition 1</p>
+</dd>
+<dt>Term 2 with <em>inline markup</em></dt>
+<dd>
+<p>Definition 2</p>
+<pre><code>{ some code, part of Definition 2 }
+</code></pre>
+<p>Third paragraph of definition 2.</p>
+</dd>
+</dl>
+.
+
+Pandoc again:
+
+.
+Term 1
+
+:   Definition
+with lazy continuation.
+
+    Second paragraph of the definition.
+.
+<dl>
+<dt>Term 1</dt>
+<dd>
+<p>Definition
+with lazy continuation.</p>
+<p>Second paragraph of the definition.</p>
+</dd>
+</dl>
+.
+
+Well, I might just copy-paste the third one while I'm at it:
+
+.
+Term 1
+  ~ Definition 1
+
+Term 2
+  ~ Definition 2a
+  ~ Definition 2b
+.
+<dl>
+<dt>Term 1</dt>
+<dd>Definition 1</dd>
+<dt>Term 2</dt>
+<dd>Definition 2a</dd>
+<dd>Definition 2b</dd>
+</dl>
+.
+
+Now, with our custom ones. Spaces after a colon:
+
+.
+Term 1
+  :    paragraph
+
+Term 2
+  :     code block
+.
+<dl>
+<dt>Term 1</dt>
+<dd>paragraph</dd>
+<dt>Term 2</dt>
+<dd>
+<pre><code>code block
+</code></pre>
+</dd>
+</dl>
+.
+
+There should be something after a colon by the way:
+
+.
+Non-term 1
+  :
+
+Non-term 2
+  :   
+.
+<p>Non-term 1
+:</p>
+<p>Non-term 2
+:</p>
+.
+
+
+List is tight iff all dts are tight:
+.
+Term 1
+: foo
+: bar
+
+Term 2
+: foo
+
+: bar
+.
+<dl>
+<dt>Term 1</dt>
+<dd>
+<p>foo</p>
+</dd>
+<dd>
+<p>bar</p>
+</dd>
+<dt>Term 2</dt>
+<dd>
+<p>foo</p>
+</dd>
+<dd>
+<p>bar</p>
+</dd>
+</dl>
+.
+
+
+Regression test (first paragraphs shouldn't be tight):
+.
+Term 1
+: foo
+
+  bar
+Term 2
+: foo
+.
+<dl>
+<dt>Term 1</dt>
+<dd>
+<p>foo</p>
+<p>bar
+Term 2</p>
+</dd>
+<dd>
+<p>foo</p>
+</dd>
+</dl>
+.
+
+Definition lists should be second last in the queue. Exemplī grātiā, this isn't a valid one:
+
+.
+# test
+  : just a paragraph with a colon
+.
+<h1>test</h1>
+<p>: just a paragraph with a colon</p>
+.
+
+Nested definition lists:
+
+.
+test
+  : foo
+      : bar
+          : baz
+      : bar
+  : foo
+.
+<dl>
+<dt>test</dt>
+<dd>
+<dl>
+<dt>foo</dt>
+<dd>
+<dl>
+<dt>bar</dt>
+<dd>baz</dd>
+</dl>
+</dd>
+<dd>bar</dd>
+</dl>
+</dd>
+<dd>foo</dd>
+</dl>
+.
+
+
+Regression test, tabs
+.
+Term 1
+  :		code block
+.
+<dl>
+<dt>Term 1</dt>
+<dd>
+<pre><code>code block
+</code></pre>
+</dd>
+</dl>
+.
+
+
+Regression test (blockquote inside deflist)
+.
+foo
+: > bar
+: baz
+.
+<dl>
+<dt>foo</dt>
+<dd>
+<blockquote>
+<p>bar</p>
+</blockquote>
+</dd>
+<dd>baz</dd>
+</dl>
+.
+
+
+Coverage, 1 blank line
+.
+test
+
+.
+<p>test</p>
+.
+
+
+Coverage, 2 blank lines
+.
+test
+
+
+.
+<p>test</p>
+.
diff --git a/tests/fixtures/dollar_math.md b/tests/fixtures/dollar_math.md
new file mode 100644
index 0000000..a1c2d43
--- /dev/null
+++ b/tests/fixtures/dollar_math.md
@@ -0,0 +1,552 @@
+single dollar
+.
+$
+.
+<p>$</p>
+.
+
+double-dollar
+.
+$$
+.
+<p>$$</p>
+.
+
+single character inline equation. (valid=True)
+.
+$a$
+.
+<p><span class="math inline">a</span></p>
+.
+
+inline equation with single greek character (valid=True)
+.
+$\\varphi$
+.
+<p><span class="math inline">\\varphi</span></p>
+.
+
+simple equation starting and ending with numbers. (valid=True)
+.
+$1+1=2$
+.
+<p><span class="math inline">1+1=2</span></p>
+.
+
+simple equation including special html character. (valid=True)
+.
+$1+1<3$
+.
+<p><span class="math inline">1+1&lt;3</span></p>
+.
+
+equation including backslashes. (valid=True)
+.
+$a \\backslash$
+.
+<p><span class="math inline">a \\backslash</span></p>
+.
+
+use of currency symbol, i.e. digits before/after opening/closing (valid=True)
+.
+3$1+2$ $1+2$3
+.
+<p>3$1+2$ $1+2$3</p>
+.
+
+use of currency symbol (valid=True)
+.
+If you solve $1+2$ you get $3
+.
+<p>If you solve <span class="math inline">1+2</span> you get $3</p>
+.
+
+inline fraction (valid=True)
+.
+$\\frac{1}{2}$
+.
+<p><span class="math inline">\\frac{1}{2}</span></p>
+.
+
+inline column vector (valid=True)
+.
+$\\begin{pmatrix}x\\\\y\\end{pmatrix}$
+.
+<p><span class="math inline">\\begin{pmatrix}x\\\\y\\end{pmatrix}</span></p>
+.
+
+inline bold vector notation (valid=True)
+.
+${\\tilde\\bold e}_\\alpha$
+.
+<p><span class="math inline">{\\tilde\\bold e}_\\alpha</span></p>
+.
+
+exponentiation (valid=True)
+.
+$a^{b}$
+.
+<p><span class="math inline">a^{b}</span></p>
+.
+
+conjugate complex (valid=True)
+.
+$a^\*b$ with $a^\*$
+.
+<p><span class="math inline">a^\*b</span> with <span class="math inline">a^\*</span></p>
+.
+
+Inline multi-line (valid=True)
+.
+a $a
+\not=1$ b
+.
+<p>a <span class="math inline">a
+\not=1</span> b</p>
+.
+
+Inline multi-line with newline (valid=False)
+.
+a $a
+
+\not=1$ b
+.
+<p>a $a</p>
+<p>\not=1$ b</p>
+.
+
+single block equation, greek index (valid=True)
+.
+$$e_\\alpha$$
+.
+<div class="math block">
+e_\\alpha
+</div>
+.
+
+display equation on its own single line. (valid=True)
+.
+$$1+1=2$$
+.
+<div class="math block">
+1+1=2
+</div>
+.
+
+display equation with number on its own single line. (valid=True)
+.
+$$1+1=2$$ (2)
+.
+<div id="2" class="math block">
+<a href="#2" class="mathlabel" title="Permalink to this equation">¶</a>
+1+1=2
+</div>
+.
+
+inline equation followed by block equation. (valid=True)
+.
+${e}_x$
+
+$$e_\\alpha$$
+.
+<p><span class="math inline">{e}_x</span></p>
+<div class="math block">
+e_\\alpha
+</div>
+.
+
+underline tests (valid=True)
+.
+$$c{\\bold e}_x = a{\\bold e}_\\alpha - b\\tilde{\\bold e}_\\alpha$$
+.
+<div class="math block">
+c{\\bold e}_x = a{\\bold e}_\\alpha - b\\tilde{\\bold e}_\\alpha
+</div>
+.
+
+non-numeric character before opening $ or
+after closing $ or both is allowed. (valid=True)
+.
+a$1+1=2$
+$1+1=2$b
+c$x$d
+.
+<p>a<span class="math inline">1+1=2</span>
+<span class="math inline">1+1=2</span>b
+c<span class="math inline">x</span>d</p>
+.
+
+following dollar character '$' is allowed. (valid=True)
+.
+$x$ $
+.
+<p><span class="math inline">x</span> $</p>
+.
+
+consecutive inline equations. (valid=True)
+.
+$x$ $y$
+.
+<p><span class="math inline">x</span> <span class="math inline">y</span></p>
+.
+
+inline equation after '-' sign in text. (valid=True)
+.
+so-what is $x$
+.
+<p>so-what is <span class="math inline">x</span></p>
+.
+
+display equation with line breaks. (valid=True)
+.
+$$
+1+1=2
+$$
+.
+<div class="math block">
+1+1=2
+</div>
+.
+
+multiple equations (valid=True)
+.
+$$
+a = 1
+$$
+
+$$
+b = 2
+$$
+.
+<div class="math block">
+a = 1
+</div>
+<div class="math block">
+b = 2
+</div>
+.
+
+equation followed by a labelled equation (valid=True)
+.
+$$
+a = 1
+$$
+
+$$
+b = 2
+$$ (1)
+.
+<div class="math block">
+a = 1
+</div>
+<div id="1" class="math block">
+<a href="#1" class="mathlabel" title="Permalink to this equation">¶</a>
+b = 2
+</div>
+.
+
+multiline equation. (valid=True)
+.
+$$\\begin{matrix}
+ f & = & 2 + x + 3 \\
+ & = & 5 + x
+\\end{matrix}$$
+.
+<div class="math block">
+\\begin{matrix}
+ f &amp; = &amp; 2 + x + 3 \\
+ &amp; = &amp; 5 + x
+\\end{matrix}
+</div>
+.
+
+vector equation. (valid=True)
+.
+$$\\begin{pmatrix}x_2 \\\\ y_2 \\end{pmatrix} =
+\\begin{pmatrix} A & B \\\\ C & D \\end{pmatrix}\\cdot
+\\begin{pmatrix} x_1 \\\\ y_1 \\end{pmatrix}$$
+.
+<div class="math block">
+\\begin{pmatrix}x_2 \\\\ y_2 \\end{pmatrix} =
+\\begin{pmatrix} A &amp; B \\\\ C &amp; D \\end{pmatrix}\\cdot
+\\begin{pmatrix} x_1 \\\\ y_1 \\end{pmatrix}
+</div>
+.
+
+display equation with equation number. (valid=True)
+.
+$$f(x) = x^2 - 1$$ (1)
+.
+<div id="1" class="math block">
+<a href="#1" class="mathlabel" title="Permalink to this equation">¶</a>
+f(x) = x^2 - 1
+</div>
+.
+
+inline equation following code section. (valid=True)
+.
+`code`$a-b$
+.
+<p><code>code</code><span class="math inline">a-b</span></p>
+.
+
+equation following code block. (valid=True)
+.
+```
+code
+```
+$$a+b$$
+.
+<pre><code>code
+</code></pre>
+<div class="math block">
+a+b
+</div>
+.
+
+numbered equation following code block. (valid=True)
+.
+```
+code
+```
+$$a+b$$(1)
+.
+<pre><code>code
+</code></pre>
+<div id="1" class="math block">
+<a href="#1" class="mathlabel" title="Permalink to this equation">¶</a>
+a+b
+</div>
+.
+
+Equations in list. (valid=True)
+.
+1. $1+2$
+2. $2+3$
+    1. $3+4$
+.
+<ol>
+<li><span class="math inline">1+2</span></li>
+<li><span class="math inline">2+3</span>
+<ol>
+<li><span class="math inline">3+4</span></li>
+</ol>
+</li>
+</ol>
+.
+
+Inline sum. (valid=True)
+.
+$\\sum\_{i=1}^n$
+.
+<p><span class="math inline">\\sum\_{i=1}^n</span></p>
+.
+
+Sum without equation number. (valid=True)
+.
+$$\\sum\_{i=1}^n$$
+.
+<div class="math block">
+\\sum\_{i=1}^n
+</div>
+.
+
+Sum with equation number. (valid=True)
+.
+$$\\sum\_{i=1}\^n$$ (2)
+.
+<div id="2" class="math block">
+<a href="#2" class="mathlabel" title="Permalink to this equation">¶</a>
+\\sum\_{i=1}\^n
+</div>
+.
+
+equation number always vertically aligned. (valid=True)
+.
+$${\\bold e}(\\varphi) = \\begin{pmatrix}
+\\cos\\varphi\\\\\\sin\\varphi
+\\end{pmatrix}$$ (3)
+.
+<div id="3" class="math block">
+<a href="#3" class="mathlabel" title="Permalink to this equation">¶</a>
+{\\bold e}(\\varphi) = \\begin{pmatrix}
+\\cos\\varphi\\\\\\sin\\varphi
+\\end{pmatrix}
+</div>
+.
+
+inline equations in blockquote. (valid=True)
+.
+> see $a = b + c$
+> $c^2=a^2+b^2$ (2)
+> $c^2=a^2+b^2$
+.
+<blockquote>
+<p>see <span class="math inline">a = b + c</span>
+<span class="math inline">c^2=a^2+b^2</span> (2)
+<span class="math inline">c^2=a^2+b^2</span></p>
+</blockquote>
+.
+
+display equation in blockquote. (valid=True)
+.
+> formula
+>
+> $$ a+b=c$$ (2)
+>
+> in blockquote.
+.
+<blockquote>
+<p>formula</p>
+<div id="2" class="math block">
+<a href="#2" class="mathlabel" title="Permalink to this equation">¶</a>
+a+b=c
+</div>
+<p>in blockquote.</p>
+</blockquote>
+.
+
+mixed syntax:
+.
+$$
+a=1 \\
+b=2
+$$ (abc)
+
+- ab $c=1$ d
+.
+<div id="abc" class="math block">
+<a href="#abc" class="mathlabel" title="Permalink to this equation">¶</a>
+a=1 \\
+b=2
+</div>
+<ul>
+<li>ab <span class="math inline">c=1</span> d</li>
+</ul>
+.
+
+escaped dollars '\\$' are interpreted as
+dollar '$' characters. (valid=True)
+.
+\\$1+1=2$
+$1+1=2\\$
+.
+<p>\<span class="math inline">1+1=2</span>
+<span class="math inline">1+1=2\\</span></p>
+.
+
+empty line between text and display formula is required. (valid=False)
+.
+some text
+ \$\\$a+b=c\$\$
+.
+<p>some text
+$\$a+b=c$$</p>
+.
+
+whitespace character after opening $
+or before closing $ is not allowed. (valid=False)
+.
+$ $
+$ x$
+$x $
+.
+<p>$ $
+$ x$
+$x $</p>
+.
+
+new line in blockquote block (valid=False):
+.
+> \$\$ a+b\n=c\$\$
+.
+<blockquote>
+<p>$$ a+b\n=c$$</p>
+</blockquote>
+.
+
+math-escaping: escaped start $:
+.
+\$p_2 = $a
+.
+<p>$p_2 = $a</p>
+.
+
+math-escaping: escaped end $:
+.
+$p_2 = \$a
+.
+<p>$p_2 = $a</p>
+.
+
+math-escaping: internal escaped $:
+.
+$p_2 = \$1$
+.
+<p><span class="math inline">p_2 = \$1</span></p>
+.
+
+math-escaping: double-escaped start $:
+.
+\\$p_2 = 1$
+.
+<p>\<span class="math inline">p_2 = 1</span></p>
+.
+
+math-escaping: double-escaped end $:
+.
+$p_2 = \\$a
+.
+<p><span class="math inline">p_2 = \\</span>a</p>
+.
+
+Inline double-dollar start:
+.
+$$a=1$$ b
+.
+<p><div class="math inline">a=1</div> b</p>
+.
+
+Inline double-dollar end:
+.
+a $$a=1$$
+.
+<p>a <div class="math inline">a=1</div></p>
+.
+
+Inline double-dollar enclosed:
+.
+a $$a=1$$ (1) b
+.
+<p>a <div class="math inline">a=1</div> (1) b</p>
+.
+
+Inline double-dollar, escaped:
+.
+a \$$a=1$$ b
+.
+<p>a $<span class="math inline">a=1</span>$ b</p>
+.
+
+Inline mixed single/double dollars:
+.
+Hence, for $\alpha \in (0, 1)$,
+$$
+  \mathbb P (\alpha \bar{X} \ge \mu) \le \alpha;
+$$
+i.e., $[\alpha \bar{X}, \infty)$ is a lower 1-sided $1-\alpha$ confidence bound for $\mu$.
+.
+<p>Hence, for <span class="math inline">\alpha \in (0, 1)</span>,
+<div class="math inline">\mathbb P (\alpha \bar{X} \ge \mu) \le \alpha;</div>
+i.e., <span class="math inline">[\alpha \bar{X}, \infty)</span> is a lower 1-sided <span class="math inline">1-\alpha</span> confidence bound for <span class="math inline">\mu</span>.</p>
+.
+
+display equation with label containing whitespace. (valid=True)
+.
+$$1+1=2$$ (a b)
+.
+<div id="a-b" class="math block">
+<a href="#a-b" class="mathlabel" title="Permalink to this equation">¶</a>
+1+1=2
+</div>
+.
diff --git a/tests/fixtures/field_list.md b/tests/fixtures/field_list.md
new file mode 100644
index 0000000..bf31ad9
--- /dev/null
+++ b/tests/fixtures/field_list.md
@@ -0,0 +1,252 @@
+Body alignment:
+.
+:no body:
+
+:single line: content
+:paragraph: content
+  running onto new line
+:body inline: paragraph 1
+
+              paragraph 2
+                
+              paragraph 3
+
+:body on 2nd line:
+  paragraph 1
+
+  paragraph 2
+
+:body on 3rd line:
+
+  paragraph 1
+
+  paragraph 2
+.
+<dl class="field-list">
+<dt>no body</dt>
+<dd></dd>
+<dt>single line</dt>
+<dd>
+<p>content</p>
+</dd>
+<dt>paragraph</dt>
+<dd>
+<p>content
+running onto new line</p>
+</dd>
+<dt>body inline</dt>
+<dd>
+<p>paragraph 1</p>
+<p>paragraph 2</p>
+<p>paragraph 3</p>
+</dd>
+<dt>body on 2nd line</dt>
+<dd>
+<p>paragraph 1</p>
+<p>paragraph 2</p>
+</dd>
+<dt>body on 3rd line</dt>
+<dd>
+<p>paragraph 1</p>
+<p>paragraph 2</p>
+</dd>
+</dl>
+.
+
+Empty name:
+.
+::
+.
+<p>::</p>
+.
+
+Whitespace only name:
+.
+: :
+.
+<p>: :</p>
+.
+
+Name markup:
+.
+:inline *markup*:
+.
+<dl class="field-list">
+<dt>inline <em>markup</em></dt>
+<dd></dd>
+</dl>
+.
+
+Content paragraph markup:
+.
+:name: body *markup*
+.
+<dl class="field-list">
+<dt>name</dt>
+<dd>
+<p>body <em>markup</em></p>
+</dd>
+</dl>
+.
+
+Body list:
+.
+:name:
+  - item 1
+  - item 2
+:name: - item 1
+       - item 2
+.
+<dl class="field-list">
+<dt>name</dt>
+<dd>
+<ul>
+<li>item 1</li>
+<li>item 2</li>
+</ul>
+</dd>
+<dt>name</dt>
+<dd>
+<ul>
+<li>item 1</li>
+<li>item 2</li>
+</ul>
+</dd>
+</dl>
+.
+
+Body code block
+.
+:name:
+      code
+:name: body
+
+           code
+.
+<dl class="field-list">
+<dt>name</dt>
+<dd>
+<pre><code>code
+</code></pre>
+</dd>
+<dt>name</dt>
+<dd>
+<p>body</p>
+<pre><code>code
+</code></pre>
+</dd>
+</dl>
+.
+
+Body blockquote:
+.
+:name:
+  > item 1
+  > item 2
+:name: > item 1
+       > item 2
+.
+<dl class="field-list">
+<dt>name</dt>
+<dd>
+<blockquote>
+<p>item 1
+item 2</p>
+</blockquote>
+</dd>
+<dt>name</dt>
+<dd>
+<blockquote>
+<p>item 1
+item 2</p>
+</blockquote>
+</dd>
+</dl>
+.
+
+Body fence:
+.
+:name:
+  ```python
+  code
+  ```
+.
+<dl class="field-list">
+<dt>name</dt>
+<dd>
+<pre><code class="language-python">code
+</code></pre>
+</dd>
+</dl>
+.
+
+Following blocks:
+.
+:name: body
+- item 1
+:name: body
+> block quote
+:name: body
+```python
+code
+```
+.
+<dl class="field-list">
+<dt>name</dt>
+<dd>
+<p>body</p>
+</dd>
+</dl>
+<ul>
+<li>item 1</li>
+</ul>
+<dl class="field-list">
+<dt>name</dt>
+<dd>
+<p>body</p>
+</dd>
+</dl>
+<blockquote>
+<p>block quote</p>
+</blockquote>
+<dl class="field-list">
+<dt>name</dt>
+<dd>
+<p>body</p>
+</dd>
+</dl>
+<pre><code class="language-python">code
+</code></pre>
+.
+
+In list:
+.
+- :name: body
+- item 2
+.
+<ul>
+<li>
+<dl class="field-list">
+<dt>name</dt>
+<dd>
+<p>body</p>
+</dd>
+</dl>
+</li>
+<li>item 2</li>
+</ul>
+.
+
+In blockquote:
+.
+> :name: body
+.
+<blockquote>
+<dl class="field-list">
+<dt>name</dt>
+<dd>
+<p>body</p>
+</dd>
+</dl>
+</blockquote>
+.
diff --git a/tests/fixtures/footnote.md b/tests/fixtures/footnote.md
new file mode 100644
index 0000000..b0643e1
--- /dev/null
+++ b/tests/fixtures/footnote.md
@@ -0,0 +1,346 @@
+
+Pandoc example:
+.
+Here is a footnote reference,[^1] and another.[^longnote]
+
+[^1]: Here is the footnote.
+
+[^longnote]: Here's one with multiple blocks.
+
+    Subsequent paragraphs are indented to show that they
+belong to the previous footnote.
+
+        { some.code }
+
+    The whole paragraph can be indented, or just the first
+    line.  In this way, multi-paragraph footnotes work like
+    multi-paragraph list items.
+
+This paragraph won't be part of the note, because it
+isn't indented.
+.
+<p>Here is a footnote reference,<sup class="footnote-ref"><a href="#fn1" id="fnref1">[1]</a></sup> and another.<sup class="footnote-ref"><a href="#fn2" id="fnref2">[2]</a></sup></p>
+<p>This paragraph won't be part of the note, because it
+isn't indented.</p>
+<hr class="footnotes-sep">
+<section class="footnotes">
+<ol class="footnotes-list">
+<li id="fn1" class="footnote-item"><p>Here is the footnote. <a href="#fnref1" class="footnote-backref">↩︎</a></p>
+</li>
+<li id="fn2" class="footnote-item"><p>Here's one with multiple blocks.</p>
+<p>Subsequent paragraphs are indented to show that they
+belong to the previous footnote.</p>
+<pre><code>{ some.code }
+</code></pre>
+<p>The whole paragraph can be indented, or just the first
+line.  In this way, multi-paragraph footnotes work like
+multi-paragraph list items. <a href="#fnref2" class="footnote-backref">↩︎</a></p>
+</li>
+</ol>
+</section>
+.
+
+
+
+They could terminate each other:
+
+.
+[^1][^2][^3]
+
+[^1]: foo
+[^2]: bar
+[^3]: baz
+.
+<p><sup class="footnote-ref"><a href="#fn1" id="fnref1">[1]</a></sup><sup class="footnote-ref"><a href="#fn2" id="fnref2">[2]</a></sup><sup class="footnote-ref"><a href="#fn3" id="fnref3">[3]</a></sup></p>
+<hr class="footnotes-sep">
+<section class="footnotes">
+<ol class="footnotes-list">
+<li id="fn1" class="footnote-item"><p>foo <a href="#fnref1" class="footnote-backref">↩︎</a></p>
+</li>
+<li id="fn2" class="footnote-item"><p>bar <a href="#fnref2" class="footnote-backref">↩︎</a></p>
+</li>
+<li id="fn3" class="footnote-item"><p>baz <a href="#fnref3" class="footnote-backref">↩︎</a></p>
+</li>
+</ol>
+</section>
+.
+
+
+They could be inside blockquotes, and are lazy:
+.
+[^foo]
+
+> [^foo]: bar
+baz
+.
+<p><sup class="footnote-ref"><a href="#fn1" id="fnref1">[1]</a></sup></p>
+<blockquote></blockquote>
+<hr class="footnotes-sep">
+<section class="footnotes">
+<ol class="footnotes-list">
+<li id="fn1" class="footnote-item"><p>bar
+baz <a href="#fnref1" class="footnote-backref">↩︎</a></p>
+</li>
+</ol>
+</section>
+.
+
+
+Their labels could not contain spaces or newlines:
+
+.
+[^ foo]: bar baz
+
+[^foo
+]: bar baz
+.
+<p>[^ foo]: bar baz</p>
+<p>[^foo
+]: bar baz</p>
+.
+
+
+We support inline notes too (pandoc example):
+
+.
+Here is an inline note.^[Inlines notes are easier to write, since
+you don't have to pick an identifier and move down to type the
+note.]
+.
+<p>Here is an inline note.<sup class="footnote-ref"><a href="#fn1" id="fnref1">[1]</a></sup></p>
+<hr class="footnotes-sep">
+<section class="footnotes">
+<ol class="footnotes-list">
+<li id="fn1" class="footnote-item"><p>Inlines notes are easier to write, since
+you don't have to pick an identifier and move down to type the
+note. <a href="#fnref1" class="footnote-backref">↩︎</a></p>
+</li>
+</ol>
+</section>
+.
+
+
+They could have arbitrary markup:
+
+.
+foo^[ *bar* ]
+.
+<p>foo<sup class="footnote-ref"><a href="#fn1" id="fnref1">[1]</a></sup></p>
+<hr class="footnotes-sep">
+<section class="footnotes">
+<ol class="footnotes-list">
+<li id="fn1" class="footnote-item"><p> <em>bar</em>  <a href="#fnref1" class="footnote-backref">↩︎</a></p>
+</li>
+</ol>
+</section>
+.
+
+
+Duplicate footnotes:
+.
+[^xxxxx] [^xxxxx]
+
+[^xxxxx]: foo
+.
+<p><sup class="footnote-ref"><a href="#fn1" id="fnref1">[1]</a></sup> <sup class="footnote-ref"><a href="#fn1" id="fnref1:1">[1:1]</a></sup></p>
+<hr class="footnotes-sep">
+<section class="footnotes">
+<ol class="footnotes-list">
+<li id="fn1" class="footnote-item"><p>foo <a href="#fnref1" class="footnote-backref">↩︎</a> <a href="#fnref1:1" class="footnote-backref">↩︎</a></p>
+</li>
+</ol>
+</section>
+.
+
+
+Indents:
+
+.
+[^xxxxx] [^yyyyy]
+
+[^xxxxx]: foo
+    ---
+
+[^yyyyy]: foo
+   ---
+.
+<p><sup class="footnote-ref"><a href="#fn1" id="fnref1">[1]</a></sup> <sup class="footnote-ref"><a href="#fn2" id="fnref2">[2]</a></sup></p>
+<hr>
+<hr class="footnotes-sep">
+<section class="footnotes">
+<ol class="footnotes-list">
+<li id="fn1" class="footnote-item"><h2>foo</h2>
+ <a href="#fnref1" class="footnote-backref">↩︎</a></li>
+<li id="fn2" class="footnote-item"><p>foo <a href="#fnref2" class="footnote-backref">↩︎</a></p>
+</li>
+</ol>
+</section>
+.
+
+
+Indents for the first line:
+
+.
+[^xxxxx] [^yyyyy]
+
+[^xxxxx]:       foo
+
+[^yyyyy]:        foo
+.
+<p><sup class="footnote-ref"><a href="#fn1" id="fnref1">[1]</a></sup> <sup class="footnote-ref"><a href="#fn2" id="fnref2">[2]</a></sup></p>
+<hr class="footnotes-sep">
+<section class="footnotes">
+<ol class="footnotes-list">
+<li id="fn1" class="footnote-item"><p>foo <a href="#fnref1" class="footnote-backref">↩︎</a></p>
+</li>
+<li id="fn2" class="footnote-item"><pre><code>foo
+</code></pre>
+ <a href="#fnref2" class="footnote-backref">↩</a></li>
+</ol>
+</section>
+.
+
+Indents for the first line (tabs):
+.
+[^xxxxx]
+
+[^xxxxx]:		foo
+.
+<p><sup class="footnote-ref"><a href="#fn1" id="fnref1">[1]</a></sup></p>
+<hr class="footnotes-sep">
+<section class="footnotes">
+<ol class="footnotes-list">
+<li id="fn1" class="footnote-item"><p>foo <a href="#fnref1" class="footnote-backref">↩︎</a></p>
+</li>
+</ol>
+</section>
+.
+
+
+Security 1
+.
+[^__proto__]
+
+[^__proto__]: blah
+.
+<p><sup class="footnote-ref"><a href="#fn1" id="fnref1">[1]</a></sup></p>
+<hr class="footnotes-sep">
+<section class="footnotes">
+<ol class="footnotes-list">
+<li id="fn1" class="footnote-item"><p>blah <a href="#fnref1" class="footnote-backref">↩︎</a></p>
+</li>
+</ol>
+</section>
+.
+
+
+Security 2
+.
+[^hasOwnProperty]
+
+[^hasOwnProperty]: blah
+.
+<p><sup class="footnote-ref"><a href="#fn1" id="fnref1">[1]</a></sup></p>
+<hr class="footnotes-sep">
+<section class="footnotes">
+<ol class="footnotes-list">
+<li id="fn1" class="footnote-item"><p>blah <a href="#fnref1" class="footnote-backref">↩︎</a></p>
+</li>
+</ol>
+</section>
+.
+
+
+Should allow links in inline footnotes
+.
+Example^[this is another example https://github.com]
+.
+<p>Example<sup class="footnote-ref"><a href="#fn1" id="fnref1">[1]</a></sup></p>
+<hr class="footnotes-sep">
+<section class="footnotes">
+<ol class="footnotes-list">
+<li id="fn1" class="footnote-item"><p>this is another example https://github.com <a href="#fnref1" class="footnote-backref">↩︎</a></p>
+</li>
+</ol>
+</section>
+.
+
+Nested blocks:
+.
+[^a]
+
+[^a]: abc
+
+    def
+hij
+
+    - list
+
+    > block
+
+terminates here
+.
+<p><sup class="footnote-ref"><a href="#fn1" id="fnref1">[1]</a></sup></p>
+<p>terminates here</p>
+<hr class="footnotes-sep">
+<section class="footnotes">
+<ol class="footnotes-list">
+<li id="fn1" class="footnote-item"><p>abc</p>
+<p>def
+hij</p>
+<ul>
+<li>list</li>
+</ul>
+<blockquote>
+<p>block</p>
+</blockquote>
+ <a href="#fnref1" class="footnote-backref">↩︎</a></li>
+</ol>
+</section>
+.
+
+Empty lines after blockquote+footnote (markdown-it-py#133)
+.
+> b [^1]
+
+Some text
+
+> c
+
+[^1]: d
+
+
+.
+<blockquote>
+<p>b <sup class="footnote-ref"><a href="#fn1" id="fnref1">[1]</a></sup></p>
+</blockquote>
+<p>Some text</p>
+<blockquote>
+<p>c</p>
+</blockquote>
+<hr class="footnotes-sep">
+<section class="footnotes">
+<ol class="footnotes-list">
+<li id="fn1" class="footnote-item"><p>d <a href="#fnref1" class="footnote-backref">↩︎</a></p>
+</li>
+</ol>
+</section>
+.
+
+
+Newline after footnote identifier
+.
+[^a]
+
+[^a]:
+b
+.
+<p><sup class="footnote-ref"><a href="#fn1" id="fnref1">[1]</a></sup></p>
+<p>b</p>
+<hr class="footnotes-sep">
+<section class="footnotes">
+<ol class="footnotes-list">
+<li id="fn1" class="footnote-item"> <a href="#fnref1" class="footnote-backref"><-</a></li>
+</ol>
+</section>
+.
diff --git a/tests/fixtures/front_matter.md b/tests/fixtures/front_matter.md
new file mode 100644
index 0000000..e01fd4e
--- /dev/null
+++ b/tests/fixtures/front_matter.md
@@ -0,0 +1,87 @@
+
+should parse empty front matter:
+.
+---
+---
+# Head
+.
+
+<h1>Head</h1>
+.
+
+
+should parse basic front matter:
+.
+---
+x: 1
+---
+# Head
+.
+
+<h1>Head</h1>
+.
+
+should parse until triple dots:
+.
+---
+x: 1
+...
+# Head
+.
+
+<h1>Head</h1>
+.
+
+should parse front matter with indentation:
+.
+---
+title: Associative arrays
+people:
+    name: John Smith
+    age: 33
+morePeople: { name: Grace Jones, age: 21 }
+---
+# Head
+.
+
+<h1>Head</h1>
+.
+
+should ignore spaces after front matter delimiters:
+.
+---   
+title: Associative arrays
+people:
+    name: John Smith
+    age: 33
+morePeople: { name: Grace Jones, age: 21 }
+---   
+# Head
+.
+
+<h1>Head</h1>
+.
+
+should ignore front matter with less than 3 opening dashes:
+.
+--
+x: 1
+--
+# Head
+.
+<h2>--
+x: 1</h2>
+<h1>Head</h1>
+.
+
+should require front matter have matching number of opening and closing dashes:
+.
+----
+x: 1
+---
+# Head
+.
+<hr>
+<h2>x: 1</h2>
+<h1>Head</h1>
+.
diff --git a/tests/fixtures/myst_block.md b/tests/fixtures/myst_block.md
new file mode 100644
index 0000000..90bf9d3
--- /dev/null
+++ b/tests/fixtures/myst_block.md
@@ -0,0 +1,149 @@
+
+Block Break:
+.
++++
+.
+<hr class="myst-block">
+.
+
+Block Break Split Markers:
+.
+ + +   + + xfsdfsdf
+.
+<hr class="myst-block">
+.
+
+Block Break Too Few Markers:
+.
+++
+.
+<p>++</p>
+.
+
+Block Break terminates other blocks:
+.
+a
++++
+- b
++++
+> c
++++
+.
+<p>a</p>
+<hr class="myst-block">
+<ul>
+<li>b</li>
+</ul>
+<hr class="myst-block">
+<blockquote>
+<p>c</p>
+</blockquote>
+<hr class="myst-block">
+.
+
+Target:
+.
+(a)=
+.
+<div class="myst-target"><a href="#a">(a)=</a></div>
+.
+
+Target characters:
+.
+(a bc   |@<>*./_-+:)=
+.
+<div class="myst-target"><a href="#a bc   |@<>*./_-+:">(a bc   |@<>*./_-+:)=</a></div>
+.
+
+Empty target:
+.
+()=
+.
+<p>()=</p>
+.
+
+Escaped target:
+.
+\(a)=
+.
+<p>(a)=</p>
+.
+
+Indented target:
+.
+  (a)= 
+.
+<div class="myst-target"><a href="#a">(a)=</a></div>
+.
+
+Target terminates other blocks:
+.
+a
+(a-b)=
+- b
+(a b)=
+> c
+(a)=
+.
+<p>a</p>
+<div class="myst-target"><a href="#a-b">(a-b)=</a></div><ul>
+<li>b</li>
+</ul>
+<div class="myst-target"><a href="#a b">(a b)=</a></div><blockquote>
+<p>c</p>
+</blockquote>
+<div class="myst-target"><a href="#a">(a)=</a></div>
+.
+
+Comment:
+.
+% abc
+.
+<!-- abc -->
+.
+
+Comment terminates other blocks:
+.
+a
+% abc
+- b
+% abc
+> c
+% abc
+.
+<p>a</p>
+<!-- abc --><ul>
+<li>b</li>
+</ul>
+<!-- abc --><blockquote>
+<p>c</p>
+</blockquote>
+<!-- abc -->
+.
+
+Multiline comment:
+.
+a
+% abc
+%   def
+- b
+%  abc
+%def
+> c
+%abc
+%
+%def
+.
+<p>a</p>
+<!-- abc
+def --><ul>
+<li>b</li>
+</ul>
+<!-- abc
+def --><blockquote>
+<p>c</p>
+</blockquote>
+<!-- abc
+
+def -->
+.
diff --git a/tests/fixtures/myst_role.md b/tests/fixtures/myst_role.md
new file mode 100644
index 0000000..4b2c248
--- /dev/null
+++ b/tests/fixtures/myst_role.md
@@ -0,0 +1,104 @@
+
+Basic:
+.
+{abc}`xyz`
+.
+<p><code class="myst role">{abc}[xyz]</code></p>
+.
+
+Multiple:
+.
+{abc}`xyz`{def}`uvw`
+.
+<p><code class="myst role">{abc}[xyz]</code><code class="myst role">{def}[uvw]</code></p>
+.
+
+Surrounding Text:
+.
+a {abc}`xyz` b
+.
+<p>a <code class="myst role">{abc}[xyz]</code> b</p>
+.
+
+New lines:
+.
+{abc}`xy
+z` `d
+e`
+.
+<p><code class="myst role">{abc}[xy z]</code> <code>d e</code></p>
+.
+
+In Code:
+.
+`` {abc}`xyz` ``
+.
+<p><code>{abc}`xyz`</code></p>
+.
+
+Empty content:
+.
+{name}`` a
+.
+<p>{name}`` a</p>
+.
+
+Surrounding Code:
+.
+`a` {abc}`xyz` `b`
+.
+<p><code>a</code> <code class="myst role">{abc}[xyz]</code> <code>b</code></p>
+.
+
+In list:
+.
+- {abc}`xyz`
+.
+<ul>
+<li><code class="myst role">{abc}[xyz]</code></li>
+</ul>
+.
+
+In Quote:
+.
+> {abc}`xyz` b
+.
+<blockquote>
+<p><code class="myst role">{abc}[xyz]</code> b</p>
+</blockquote>
+.
+
+Multiple ticks:
+.
+{abc}``xyz``
+.
+<p><code class="myst role">{abc}[xyz]</code></p>
+.
+
+Inner tick:
+.
+{abc}``x`yz``
+.
+<p><code class="myst role">{abc}[x`yz]</code></p>
+.
+
+Unbalanced ticks:
+.
+{abc}``xyz`
+.
+<p>{abc}``xyz`</p>
+.
+
+Space in name:
+.
+{ab c}`xyz`
+.
+<p>{ab c}<code>xyz</code></p>
+.
+
+Escaped:
+.
+\{abc}`xyz`
+.
+<p>{abc}<code>xyz</code></p>
+.
diff --git a/tests/fixtures/span.md b/tests/fixtures/span.md
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/tests/fixtures/span.md
diff --git a/tests/fixtures/substitution.md b/tests/fixtures/substitution.md
new file mode 100644
index 0000000..1987354
--- /dev/null
+++ b/tests/fixtures/substitution.md
@@ -0,0 +1,125 @@
+Basic (space):
+.
+{{ block }}
+
+a {{ inline }} b
+.
+<div class="substitution" text="block" />
+<p>a <span class="substitution" text="inline" /> b</p>
+.
+
+Basic (no space):
+.
+{{block}}
+
+a {{inline}} b
+.
+<div class="substitution" text="block" />
+<p>a <span class="substitution" text="inline" /> b</p>
+.
+
+Same line:
+.
+{{a}}{{b}}
+.
+<p><span class="substitution" text="a" /><span class="substitution" text="b" /></p>
+.
+
+No closing:
+.
+{{ a
+
+{{b}
+
+{{c} }
+.
+<p>{{ a</p>
+<p>{{b}</p>
+<p>{{c} }</p>
+.
+
+Inside code
+.
+`{{ a }}`
+
+```python
+{{b}}
+```
+.
+<p><code>{{ a }}</code></p>
+<pre><code class="language-python">{{b}}
+</code></pre>
+.
+
+New line:
+.
+{{a}}
+{{b}}
+.
+<div class="substitution" text="a" />
+<div class="substitution" text="b" />
+.
+
+Blocks:
+.
+- {{a}}
+
+> {{b}}
+
+1. {{c}}
+.
+<ul>
+<li>
+<div class="substitution" text="a" />
+</li>
+</ul>
+<blockquote>
+<div class="substitution" text="b" />
+</blockquote>
+<ol>
+<li>
+<div class="substitution" text="c" />
+</li>
+</ol>
+.
+
+Inline:
+.
+- {{a}} x
+
+> {{b}} y
+
+1. {{c}} z
+.
+<ul>
+<li><span class="substitution" text="a" /> x</li>
+</ul>
+<blockquote>
+<p><span class="substitution" text="b" /> y</p>
+</blockquote>
+<ol>
+<li><span class="substitution" text="c" /> z</li>
+</ol>
+.
+
+Tables:
+.
+| | |
+|-|-|
+|{{a}}|{{b}} c|
+.
+<table>
+<thead>
+<tr>
+<th></th>
+<th></th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td><span class="substitution" text="a" /></td>
+<td><span class="substitution" text="b" /> c</td>
+</tr>
+</tbody>
+</table>
+.
diff --git a/tests/fixtures/tasklists.md b/tests/fixtures/tasklists.md
new file mode 100644
index 0000000..dec0fef
--- /dev/null
+++ b/tests/fixtures/tasklists.md
@@ -0,0 +1,131 @@
+
+bullet.md:
+
+.
+- [ ] unchecked item 1
+- [ ] unchecked item 2
+- [ ] unchecked item 3
+- [x] checked item 4
+.
+<ul class="contains-task-list">
+<li class="task-list-item"><input class="task-list-item-checkbox" disabled="disabled" type="checkbox"> unchecked item 1</li>
+<li class="task-list-item"><input class="task-list-item-checkbox" disabled="disabled" type="checkbox"> unchecked item 2</li>
+<li class="task-list-item"><input class="task-list-item-checkbox" disabled="disabled" type="checkbox"> unchecked item 3</li>
+<li class="task-list-item"><input class="task-list-item-checkbox" checked="checked" disabled="disabled" type="checkbox"> checked item 4</li>
+</ul>
+
+.
+
+dirty.md:
+
+.
+-   [ ] unchecked todo item 1
+- [ ]
+- [  ] not a todo item 2
+- [ x] not a todo item 3
+- [x ] not a todo item 4
+- [ x ] not a todo item 5
+-   [x] todo item 6
+
+.
+<ul class="contains-task-list">
+<li class="task-list-item"><input class="task-list-item-checkbox" disabled="disabled" type="checkbox"> unchecked todo item 1</li>
+<li>[ ]</li>
+<li>[  ] not a todo item 2</li>
+<li>[ x] not a todo item 3</li>
+<li>[x ] not a todo item 4</li>
+<li>[ x ] not a todo item 5</li>
+<li class="task-list-item"><input class="task-list-item-checkbox" checked="checked" disabled="disabled" type="checkbox"> todo item 6</li>
+</ul>
+
+.
+
+mixed-nested.md:
+
+.
+# Test 1
+
+1. foo
+   * [ ] nested unchecked item 1
+   * not a todo item 2
+   * not a todo item 3
+   * [x] nested checked item 4
+2. bar
+3. spam
+
+# Test 2
+
+- foo
+  - [ ] nested unchecked item 1
+  - [ ] nested unchecked item 2
+  - [x] nested checked item 3
+  - [X] nested checked item 4
+
+
+.
+<h1>Test 1</h1>
+<ol>
+<li>foo
+<ul class="contains-task-list">
+<li class="task-list-item"><input class="task-list-item-checkbox" disabled="disabled" type="checkbox"> nested unchecked item 1</li>
+<li>not a todo item 2</li>
+<li>not a todo item 3</li>
+<li class="task-list-item"><input class="task-list-item-checkbox" checked="checked" disabled="disabled" type="checkbox"> nested checked item 4</li>
+</ul>
+</li>
+<li>bar</li>
+<li>spam</li>
+</ol>
+<h1>Test 2</h1>
+<ul>
+<li>foo
+<ul class="contains-task-list">
+<li class="task-list-item"><input class="task-list-item-checkbox" disabled="disabled" type="checkbox"> nested unchecked item 1</li>
+<li class="task-list-item"><input class="task-list-item-checkbox" disabled="disabled" type="checkbox"> nested unchecked item 2</li>
+<li class="task-list-item"><input class="task-list-item-checkbox" checked="checked" disabled="disabled" type="checkbox"> nested checked item 3</li>
+<li class="task-list-item"><input class="task-list-item-checkbox" checked="checked" disabled="disabled" type="checkbox"> nested checked item 4</li>
+</ul>
+</li>
+</ul>
+
+.
+
+oedered.md:
+
+.
+1. [x] checked ordered 1
+2. [ ] unchecked ordered 2
+3. [x] checked ordered 3
+4. [ ] unchecked ordered 4
+
+.
+<ol class="contains-task-list">
+<li class="task-list-item"><input class="task-list-item-checkbox" checked="checked" disabled="disabled" type="checkbox"> checked ordered 1</li>
+<li class="task-list-item"><input class="task-list-item-checkbox" disabled="disabled" type="checkbox"> unchecked ordered 2</li>
+<li class="task-list-item"><input class="task-list-item-checkbox" checked="checked" disabled="disabled" type="checkbox"> checked ordered 3</li>
+<li class="task-list-item"><input class="task-list-item-checkbox" disabled="disabled" type="checkbox"> unchecked ordered 4</li>
+</ol>
+
+.
+
+Tab after task list item marker
+.
++ [x]	item 1
++ [ ]		item 2
+.
+<ul class="contains-task-list">
+<li class="task-list-item">	item 1</li>
+<li class="task-list-item">		item 2</li>
+</ul>
+.
+
+Form feed after task list item marker
+.
++ [x]item 1
++ [ ]item 2
+.
+<ul class="contains-task-list">
+<li class="task-list-item">item 1</li>
+<li class="task-list-item">item 2</li>
+</ul>
+.
diff --git a/tests/fixtures/texmath_bracket.md b/tests/fixtures/texmath_bracket.md
new file mode 100644
index 0000000..330f4cb
--- /dev/null
+++ b/tests/fixtures/texmath_bracket.md
@@ -0,0 +1,387 @@
+single character inline equation. (valid=True)
+.
+\(a\)
+.
+<p><eq>a</eq></p>
+.
+
+inline equation with single greek character (valid=True)
+.
+\(\\varphi\)
+.
+<p><eq>\\varphi</eq></p>
+.
+
+simple equation starting and ending with numbers. (valid=True)
+.
+\(1+1=2\)
+.
+<p><eq>1+1=2</eq></p>
+.
+
+simple equation including special html character. (valid=True)
+.
+\(1+1<3\)
+.
+<p><eq>1+1<3</eq></p>
+.
+
+equation including backslashes. (valid=True)
+.
+\(a \\backslash\)
+.
+<p><eq>a \\backslash</eq></p>
+.
+
+use of currency symbol (valid=True)
+.
+You get 3$ if you solve \(1+2\)
+.
+<p>You get 3$ if you solve <eq>1+2</eq></p>
+.
+
+use of currency symbol (valid=True)
+.
+If you solve \(1+2\) you get $3
+.
+<p>If you solve <eq>1+2</eq> you get $3</p>
+.
+
+inline fraction (valid=True)
+.
+\(\\frac{1}{2}\)
+.
+<p><eq>\\frac{1}{2}</eq></p>
+.
+
+inline column vector (valid=True)
+.
+\(\\begin{pmatrix}x\\\\y\\end{pmatrix}\)
+.
+<p><eq>\\begin{pmatrix}x\\\\y\\end{pmatrix}</eq></p>
+.
+
+inline bold vector notation (valid=True)
+.
+\({\\tilde\\bold e}_\\alpha\)
+.
+<p><eq>{\\tilde\\bold e}_\\alpha</eq></p>
+.
+
+exponentiation (valid=True)
+.
+\(a^{b}\)
+.
+<p><eq>a^{b}</eq></p>
+.
+
+conjugate complex (valid=True)
+.
+\(a^\*b\) with \(a^\*\)
+.
+<p><eq>a^\*b</eq> with <eq>a^\*</eq></p>
+.
+
+Inline multi-line (valid=True)
+.
+a \(a
+\not=1\) b
+.
+<p>a <eq>a
+\not=1</eq> b</p>
+.
+
+Inline multi-line with newline (valid=False)
+.
+a \(a
+
+\not=1\) b
+.
+<p>a (a</p>
+<p>\not=1) b</p>
+.
+
+single block equation, greek index (valid=True)
+.
+\[e_\\alpha\]
+.
+<section>
+<eqn>e_\\alpha</eqn>
+</section>
+.
+
+display equation on its own single line. (valid=True)
+.
+\[1+1=2\]
+.
+<section>
+<eqn>1+1=2</eqn>
+</section>
+.
+
+inline equation followed by block equation. (valid=True)
+.
+\({e}_x\)
+
+\[e_\\alpha\]
+.
+<p><eq>{e}_x</eq></p>
+<section>
+<eqn>e_\\alpha</eqn>
+</section>
+.
+
+underline tests (valid=True)
+.
+\[c{\\bold e}_x = a{\\bold e}_\\alpha - b\\tilde{\\bold e}_\\alpha\]
+.
+<section>
+<eqn>c{\\bold e}_x = a{\\bold e}_\\alpha - b\\tilde{\\bold e}_\\alpha</eqn>
+</section>
+.
+
+non-numeric character before opening $ or
+after closing $ or both is allowed. (valid=True)
+.
+a\(1+1=2\)
+\(1+1=2\)b
+c\(x\)d
+.
+<p>a<eq>1+1=2</eq>
+<eq>1+1=2</eq>b
+c<eq>x</eq>d</p>
+.
+
+following dollar character '$' is allowed. (valid=True)
+.
+\(x\) $
+.
+<p><eq>x</eq> $</p>
+.
+
+consecutive inline equations. (valid=True)
+.
+\(x\) \(y\)
+.
+<p><eq>x</eq> <eq>y</eq></p>
+.
+
+inline equation after '-' sign in text. (valid=True)
+.
+so-what is \(x\)
+.
+<p>so-what is <eq>x</eq></p>
+.
+
+display equation with line breaks. (valid=True)
+.
+\[
+1+1=2
+\]
+.
+<section>
+<eqn>
+1+1=2
+</eqn>
+</section>
+.
+
+multiple equations (valid=True)
+.
+\[
+a = 1
+\]
+
+\[
+b = 2
+\]
+.
+<section>
+<eqn>
+a = 1
+</eqn>
+</section>
+<section>
+<eqn>
+b = 2
+</eqn>
+</section>
+.
+
+equation followed by a labelled equation (valid=True)
+.
+\[
+a = 1
+\]
+
+\[
+b = 2
+\] (1)
+.
+<section>
+<eqn>
+a = 1
+</eqn>
+</section>
+<section>
+<eqn>
+b = 2
+</eqn>
+</section>
+.
+
+multiline equation. (valid=True)
+.
+\[\\begin{matrix}
+ f & = & 2 + x + 3 \\ 
+ & = & 5 + x 
+\\end{matrix}\]
+.
+<section>
+<eqn>\\begin{matrix}
+ f & = & 2 + x + 3 \\ 
+ & = & 5 + x 
+\\end{matrix}</eqn>
+</section>
+.
+
+vector equation. (valid=True)
+.
+\[\\begin{pmatrix}x_2 \\\\ y_2 \\end{pmatrix} = 
+\\begin{pmatrix} A & B \\\\ C & D \\end{pmatrix}\\cdot
+\\begin{pmatrix} x_1 \\\\ y_1 \\end{pmatrix}\]
+.
+<section>
+<eqn>\\begin{pmatrix}x_2 \\\\ y_2 \\end{pmatrix} = 
+\\begin{pmatrix} A & B \\\\ C & D \\end{pmatrix}\\cdot
+\\begin{pmatrix} x_1 \\\\ y_1 \\end{pmatrix}</eqn>
+</section>
+.
+
+display equation with equation number. (valid=True)
+.
+\[f(x) = x^2 - 1\] (1)
+.
+<section>
+<eqn>f(x) = x^2 - 1</eqn>
+</section>
+.
+
+inline equation following code section. (valid=True)
+.
+`code`\(a-b\)
+.
+<p><code>code</code><eq>a-b</eq></p>
+.
+
+equation following code block. (valid=True)
+.
+```
+code
+```
+\[a+b\]
+.
+<pre><code>code
+</code></pre>
+<section>
+<eqn>a+b</eqn>
+</section>
+.
+
+numbered equation following code block. (valid=True)
+.
+```
+code
+```
+\[a+b\](1)
+.
+<pre><code>code
+</code></pre>
+<section>
+<eqn>a+b</eqn>
+</section>
+.
+
+Equations in list. (valid=True)
+.
+1. \(1+2\)
+2. \(2+3\)
+    1. \(3+4\)
+.
+<ol>
+<li><eq>1+2</eq></li>
+<li><eq>2+3</eq>
+<ol>
+<li><eq>3+4</eq></li>
+</ol>
+</li>
+</ol>
+.
+
+Inline sum. (valid=True)
+.
+\(\\sum\_{i=1}^n\)
+.
+<p><eq>\\sum\_{i=1}^n</eq></p>
+.
+
+Sum without equation number. (valid=True)
+.
+\[\\sum\_{i=1}^n\]
+.
+<section>
+<eqn>\\sum\_{i=1}^n</eqn>
+</section>
+.
+
+Sum with equation number. (valid=True)
+.
+\[\\sum\_{i=1}\^n\] \(2\)
+.
+<section>
+<eqn>\\sum\_{i=1}\^n</eqn>
+</section>
+.
+
+equation number always vertically aligned. (valid=True)
+.
+\[{\\bold e}(\\varphi) = \\begin{pmatrix}
+\\cos\\varphi\\\\\\sin\\varphi
+\\end{pmatrix}\] (3)
+.
+<section>
+<eqn>{\\bold e}(\\varphi) = \\begin{pmatrix}
+\\cos\\varphi\\\\\\sin\\varphi
+\\end{pmatrix}</eqn>
+</section>
+.
+
+inline equations in blockquote. (valid=True)
+.
+> see \(a = b + c\) 
+> \(c^2=a^2+b^2\) (2) 
+> \(c^2=a^2+b^2\) 
+.
+<blockquote>
+<p>see <eq>a = b + c</eq>
+<eq>c^2=a^2+b^2</eq> (2)
+<eq>c^2=a^2+b^2</eq></p>
+</blockquote>
+.
+
+display equation in blockquote. (valid=True)
+.
+> formula
+>
+> \[ a+b=c\] (2)
+>
+> in blockquote. 
+.
+<blockquote>
+<p>formula</p>
+<section>
+<eqn> a+b=c</eqn>
+</section>
+<p>in blockquote.</p>
+</blockquote>
+.
diff --git a/tests/fixtures/texmath_dollar.md b/tests/fixtures/texmath_dollar.md
new file mode 100644
index 0000000..bada6fe
--- /dev/null
+++ b/tests/fixtures/texmath_dollar.md
@@ -0,0 +1,438 @@
+single character inline equation. (valid=True)
+.
+$a$
+.
+<p><eq>a</eq></p>
+.
+
+inline equation with single greek character (valid=True)
+.
+$\\varphi$
+.
+<p><eq>\\varphi</eq></p>
+.
+
+simple equation starting and ending with numbers. (valid=True)
+.
+$1+1=2$
+.
+<p><eq>1+1=2</eq></p>
+.
+
+simple equation including special html character. (valid=True)
+.
+$1+1<3$
+.
+<p><eq>1+1<3</eq></p>
+.
+
+equation including backslashes. (valid=True)
+.
+$a \\backslash$
+.
+<p><eq>a \\backslash</eq></p>
+.
+
+use of currency symbol (valid=True)
+.
+You get 3$ if you solve $1+2$
+.
+<p>You get 3$ if you solve <eq>1+2</eq></p>
+.
+
+use of currency symbol (valid=True)
+.
+If you solve $1+2$ you get $3
+.
+<p>If you solve <eq>1+2</eq> you get $3</p>
+.
+
+inline fraction (valid=True)
+.
+$\\frac{1}{2}$
+.
+<p><eq>\\frac{1}{2}</eq></p>
+.
+
+inline column vector (valid=True)
+.
+$\\begin{pmatrix}x\\\\y\\end{pmatrix}$
+.
+<p><eq>\\begin{pmatrix}x\\\\y\\end{pmatrix}</eq></p>
+.
+
+inline bold vector notation (valid=True)
+.
+${\\tilde\\bold e}_\\alpha$
+.
+<p><eq>{\\tilde\\bold e}_\\alpha</eq></p>
+.
+
+exponentiation (valid=True)
+.
+$a^{b}$
+.
+<p><eq>a^{b}</eq></p>
+.
+
+conjugate complex (valid=True)
+.
+$a^\*b$ with $a^\*$
+.
+<p><eq>a^\*b</eq> with <eq>a^\*</eq></p>
+.
+
+Inline multi-line (valid=True)
+.
+a $a
+\not=1$ b
+.
+<p>a <eq>a
+\not=1</eq> b</p>
+.
+
+Inline multi-line with newline (valid=False)
+.
+a $a
+
+\not=1$ b
+.
+<p>a $a</p>
+<p>\not=1$ b</p>
+.
+
+single block equation, greek index (valid=True)
+.
+$$e_\\alpha$$
+.
+<section>
+<eqn>e_\\alpha</eqn>
+</section>
+.
+
+display equation on its own single line. (valid=True)
+.
+$$1+1=2$$
+.
+<section>
+<eqn>1+1=2</eqn>
+</section>
+.
+
+inline equation followed by block equation. (valid=True)
+.
+${e}_x$
+
+$$e_\\alpha$$
+.
+<p><eq>{e}_x</eq></p>
+<section>
+<eqn>e_\\alpha</eqn>
+</section>
+.
+
+underline tests (valid=True)
+.
+$$c{\\bold e}_x = a{\\bold e}_\\alpha - b\\tilde{\\bold e}_\\alpha$$
+.
+<section>
+<eqn>c{\\bold e}_x = a{\\bold e}_\\alpha - b\\tilde{\\bold e}_\\alpha</eqn>
+</section>
+.
+
+non-numeric character before opening $ or
+after closing $ or both is allowed. (valid=True)
+.
+a$1+1=2$
+$1+1=2$b
+c$x$d
+.
+<p>a<eq>1+1=2</eq>
+<eq>1+1=2</eq>b
+c<eq>x</eq>d</p>
+.
+
+following dollar character '$' is allowed. (valid=True)
+.
+$x$ $ 
+.
+<p><eq>x</eq> $</p>
+.
+
+consecutive inline equations. (valid=True)
+.
+$x$ $y$
+.
+<p><eq>x</eq> <eq>y</eq></p>
+.
+
+inline equation after '-' sign in text. (valid=True)
+.
+so-what is $x$
+.
+<p>so-what is <eq>x</eq></p>
+.
+
+display equation with line breaks. (valid=True)
+.
+$$
+1+1=2
+$$
+.
+<section>
+<eqn>
+1+1=2
+</eqn>
+</section>
+.
+
+multiple equations (valid=True)
+.
+$$
+a = 1
+$$
+
+$$
+b = 2
+$$
+.
+<section>
+<eqn>
+a = 1
+</eqn>
+</section>
+<section>
+<eqn>
+b = 2
+</eqn>
+</section>
+.
+
+equation followed by a labelled equation (valid=True)
+.
+$$
+a = 1
+$$
+
+$$
+b = 2
+$$ (1)
+.
+<section>
+<eqn>
+a = 1
+</eqn>
+</section>
+<section>
+<eqn>
+b = 2
+</eqn>
+</section>
+.
+
+multiline equation. (valid=True)
+.
+$$\\begin{matrix}
+ f & = & 2 + x + 3 \\ 
+ & = & 5 + x 
+\\end{matrix}$$
+.
+<section>
+<eqn>\\begin{matrix}
+ f & = & 2 + x + 3 \\ 
+ & = & 5 + x 
+\\end{matrix}</eqn>
+</section>
+.
+
+vector equation. (valid=True)
+.
+$$\\begin{pmatrix}x_2 \\\\ y_2 \\end{pmatrix} = 
+\\begin{pmatrix} A & B \\\\ C & D \\end{pmatrix}\\cdot
+\\begin{pmatrix} x_1 \\\\ y_1 \\end{pmatrix}$$
+.
+<section>
+<eqn>\\begin{pmatrix}x_2 \\\\ y_2 \\end{pmatrix} = 
+\\begin{pmatrix} A & B \\\\ C & D \\end{pmatrix}\\cdot
+\\begin{pmatrix} x_1 \\\\ y_1 \\end{pmatrix}</eqn>
+</section>
+.
+
+display equation with equation number. (valid=True)
+.
+$$f(x) = x^2 - 1$$ (1)
+.
+<section>
+<eqn>f(x) = x^2 - 1</eqn>
+</section>
+.
+
+inline equation following code section. (valid=True)
+.
+`code`$a-b$
+.
+<p><code>code</code><eq>a-b</eq></p>
+.
+
+equation following code block. (valid=True)
+.
+```
+code
+```
+$$a+b$$
+.
+<pre><code>code
+</code></pre>
+<section>
+<eqn>a+b</eqn>
+</section>
+.
+
+numbered equation following code block. (valid=True)
+.
+```
+code
+```
+$$a+b$$(1)
+.
+<pre><code>code
+</code></pre>
+<section>
+<eqn>a+b</eqn>
+</section>
+.
+
+Equations in list. (valid=True)
+.
+1. $1+2$
+2. $2+3$
+    1. $3+4$
+.
+<ol>
+<li><eq>1+2</eq></li>
+<li><eq>2+3</eq>
+<ol>
+<li><eq>3+4</eq></li>
+</ol>
+</li>
+</ol>
+.
+
+Inline sum. (valid=True)
+.
+$\\sum\_{i=1}^n$
+.
+<p><eq>\\sum\_{i=1}^n</eq></p>
+.
+
+Sum without equation number. (valid=True)
+.
+$$\\sum\_{i=1}^n$$
+.
+<section>
+<eqn>\\sum\_{i=1}^n</eqn>
+</section>
+.
+
+Sum with equation number. (valid=True)
+.
+$$\\sum\_{i=1}\^n$$ \(2\)
+.
+<section>
+<eqn>\\sum\_{i=1}\^n</eqn>
+</section>
+.
+
+equation number always vertically aligned. (valid=True)
+.
+$${\\bold e}(\\varphi) = \\begin{pmatrix}
+\\cos\\varphi\\\\\\sin\\varphi
+\\end{pmatrix}$$ (3)
+.
+<section>
+<eqn>{\\bold e}(\\varphi) = \\begin{pmatrix}
+\\cos\\varphi\\\\\\sin\\varphi
+\\end{pmatrix}</eqn>
+</section>
+.
+
+inline equations in blockquote. (valid=True)
+.
+> see $a = b + c$ 
+> $c^2=a^2+b^2$ (2) 
+> $c^2=a^2+b^2$ 
+.
+<blockquote>
+<p>see <eq>a = b + c</eq>
+<eq>c^2=a^2+b^2</eq> (2)
+<eq>c^2=a^2+b^2</eq></p>
+</blockquote>
+.
+
+display equation in blockquote. (valid=True)
+.
+> formula
+>
+> $$ a+b=c$$ (2)
+>
+> in blockquote. 
+.
+<blockquote>
+<p>formula</p>
+<section>
+<eqn> a+b=c</eqn>
+</section>
+<p>in blockquote.</p>
+</blockquote>
+.
+
+mixed syntax:
+.
+$$
+a=1 \\
+b=2
+$$ (abc)
+
+- ab $c=1$ d
+.
+<section>
+<eqn>
+a=1 \\
+b=2
+</eqn>
+</section>
+<ul>
+<li>ab <eq>c=1</eq> d</li>
+</ul>
+.
+
+escaped dollars '\\$' are interpreted as
+dollar '$' characters. (valid=True)
+.
+\\$1+1=2$
+$1+1=2\\$
+.
+<p>\$1+1=2$
+$1+1=2\$</p>
+.
+
+empty line between text and display formula is required. (valid=False)
+.
+some text
+ \$\\$a+b=c\$\$
+.
+<p>some text
+$\$a+b=c$$</p>
+.
+
+whitespace character after opening $
+or before closing $ is not allowed. (valid=False)
+.
+$ $
+$ x$
+$x $
+.
+<p>$ $
+$ x$
+$x $</p>
+.
diff --git a/tests/fixtures/wordcount.md b/tests/fixtures/wordcount.md
new file mode 100644
index 0000000..e9c7948
--- /dev/null
+++ b/tests/fixtures/wordcount.md
@@ -0,0 +1,51 @@
+syntax (text)
+.
+one two
+three four
+
+- five six
+
+> seven eight
+
+[nine ten](link)
+.
+{
+  "minutes": 0,
+  "text": [
+    "one two",
+    "three four",
+    "five six",
+    "seven eight",
+    "nine ten"
+  ],
+  "words": 10
+}
+.
+
+non-words
+.
+Geeksforgeeks,    is best @# Computer Science Portal.!!!
+.
+{
+  "minutes": 0,
+  "words": 6
+}
+.
+
+lore ipsum
+.
+Lorem ipsum dolor sit amet, consectetur adipiscing elit. Praesent imperdiet hendrerit dictum. Etiam diam turpis, cursus in varius dignissim, imperdiet nec nibh. Nulla nec finibus dui. Phasellus fermentum venenatis placerat. Donec ut dui in sem rhoncus molestie. Sed auctor sem dapibus augue varius facilisis. Maecenas at suscipit dolor. Orci varius natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Vestibulum ornare dui ac tristique ultricies. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos. Quisque arcu erat, ultricies ac lorem at, semper ornare nisl.
+
+Donec massa magna, commodo et ultrices ac, rutrum non nulla. Nunc fermentum fringilla ultrices. Morbi ante nibh, accumsan ac viverra quis, gravida rutrum mi. Integer lobortis, purus id laoreet ornare, sapien odio placerat massa, vel vestibulum dolor ante id mi. Donec ex leo, ultricies non ante eget, pharetra dictum orci. Interdum et malesuada fames ac ante ipsum primis in faucibus. Maecenas vitae tortor ut nisi cursus egestas. Vestibulum ante ipsum primis in faucibus orci luctus et ultrices posuere cubilia curae; Morbi et nunc posuere, pharetra est aliquet, iaculis libero. Aliquam leo nibh, posuere eget eros a, convallis bibendum nibh. Phasellus vulputate bibendum lacus sit amet varius. Integer ut rutrum dolor, ac finibus neque. Maecenas ultrices pretium augue vitae mollis. Fusce semper lorem eu mauris iaculis pulvinar.
+
+Morbi ac pretium nunc, ac faucibus enim. Duis consequat nibh metus, at sodales sem luctus nec. Donec id finibus ante. Duis tincidunt vulputate efficitur. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos. Aenean porttitor augue consectetur, feugiat odio in, rutrum velit. Aliquam et mi lacinia, efficitur nisl nec, rutrum mauris. Mauris efficitur eros in maximus tempor. Suspendisse potenti. Quisque cursus non libero in faucibus. Etiam dignissim urna vel nibh feugiat, at vehicula dui vulputate.
+
+Praesent malesuada arcu quis neque condimentum vestibulum. Aliquam pretium eleifend neque, eget vulputate erat faucibus at. Quisque egestas nunc ac hendrerit fringilla. Vestibulum at tristique lacus, eget placerat risus. Aenean a metus ullamcorper, eleifend ante ut, feugiat lacus. Proin eget semper purus, ac vehicula nisl. Suspendisse eu mi enim. Nullam aliquam purus eu orci iaculis suscipit. Mauris dapibus non neque eu hendrerit. Sed eros purus, finibus ut ex ac, ultricies luctus enim. Quisque non lacus arcu. Ut dictum mauris ac tristique pulvinar. Aenean ut nisl massa. Donec nec dui scelerisque, egestas arcu sit amet, tempor eros.
+
+Donec sit amet faucibus tellus. Cras auctor mi id quam rhoncus, eget porttitor magna ultrices. Sed tristique ut augue in facilisis. Duis in finibus diam. In hac habitasse platea dictumst. Vestibulum in pulvinar orci. Sed a justo cursus enim ultrices egestas sed sit amet leo. Donec sed auctor urna. Praesent vitae dapibus ipsum. Nulla facilisi. Pellentesque non nisi sem. Sed ac mi rutrum, blandit purus ut, facilisis ipsum.
+.
+{
+  "minutes": 2,
+  "words": 458
+}
+.
diff --git a/tests/test_admon.py b/tests/test_admon.py
new file mode 100644
index 0000000..efd0ee8
--- /dev/null
+++ b/tests/test_admon.py
@@ -0,0 +1,21 @@
+from pathlib import Path
+
+from markdown_it import MarkdownIt
+from markdown_it.utils import read_fixture_file
+import pytest
+
+from mdit_py_plugins.admon import admon_plugin
+
+FIXTURE_PATH = Path(__file__).parent
+
+
+@pytest.mark.parametrize(
+    "line,title,input,expected",
+    read_fixture_file(FIXTURE_PATH.joinpath("fixtures", "admon.md")),
+)
+def test_all(line, title, input, expected):
+    md = MarkdownIt("commonmark").use(admon_plugin)
+    md.options["xhtmlOut"] = False
+    text = md.render(input)
+    print(text)
+    assert text.rstrip() == expected.rstrip()
diff --git a/tests/test_amsmath.py b/tests/test_amsmath.py
new file mode 100644
index 0000000..55b4987
--- /dev/null
+++ b/tests/test_amsmath.py
@@ -0,0 +1,39 @@
+from pathlib import Path
+from textwrap import dedent
+
+from markdown_it import MarkdownIt
+from markdown_it.utils import read_fixture_file
+import pytest
+
+from mdit_py_plugins.amsmath import amsmath_plugin
+
+FIXTURE_PATH = Path(__file__).parent
+
+
+def test_plugin_parse(data_regression):
+    md = MarkdownIt().use(amsmath_plugin)
+    tokens = md.parse(
+        dedent(
+            """\
+    a
+    \\begin{equation}
+    b=1
+    c=2
+    \\end{equation}
+    d
+    """
+        )
+    )
+    data_regression.check([t.as_dict() for t in tokens])
+
+
+@pytest.mark.parametrize(
+    "line,title,input,expected",
+    read_fixture_file(FIXTURE_PATH.joinpath("fixtures", "amsmath.md")),
+)
+def test_fixtures(line, title, input, expected):
+    md = MarkdownIt("commonmark").use(amsmath_plugin)
+    md.options["xhtmlOut"] = False
+    text = md.render(input)
+    print(text)
+    assert text.rstrip() == expected.rstrip()
diff --git a/tests/test_amsmath/test_plugin_parse.yml b/tests/test_amsmath/test_plugin_parse.yml
new file mode 100644
index 0000000..4d6b949
--- /dev/null
+++ b/tests/test_amsmath/test_plugin_parse.yml
@@ -0,0 +1,135 @@
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 0
+  map:
+  - 0
+  - 1
+  markup: ''
+  meta: {}
+  nesting: 1
+  tag: p
+  type: paragraph_open
+- attrs: null
+  block: true
+  children:
+  - attrs: null
+    block: false
+    children: null
+    content: a
+    hidden: false
+    info: ''
+    level: 0
+    map: null
+    markup: ''
+    meta: {}
+    nesting: 0
+    tag: ''
+    type: text
+  content: a
+  hidden: false
+  info: ''
+  level: 1
+  map:
+  - 0
+  - 1
+  markup: ''
+  meta: {}
+  nesting: 0
+  tag: ''
+  type: inline
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 0
+  map: null
+  markup: ''
+  meta: {}
+  nesting: -1
+  tag: p
+  type: paragraph_close
+- attrs: null
+  block: true
+  children: null
+  content: '\begin{equation}
+
+    b=1
+
+    c=2
+
+    \end{equation}'
+  hidden: false
+  info: ''
+  level: 0
+  map:
+  - 1
+  - 4
+  markup: ''
+  meta:
+    environment: equation
+    numbered: ''
+  nesting: 0
+  tag: math
+  type: amsmath
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 0
+  map:
+  - 5
+  - 6
+  markup: ''
+  meta: {}
+  nesting: 1
+  tag: p
+  type: paragraph_open
+- attrs: null
+  block: true
+  children:
+  - attrs: null
+    block: false
+    children: null
+    content: d
+    hidden: false
+    info: ''
+    level: 0
+    map: null
+    markup: ''
+    meta: {}
+    nesting: 0
+    tag: ''
+    type: text
+  content: d
+  hidden: false
+  info: ''
+  level: 1
+  map:
+  - 5
+  - 6
+  markup: ''
+  meta: {}
+  nesting: 0
+  tag: ''
+  type: inline
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 0
+  map: null
+  markup: ''
+  meta: {}
+  nesting: -1
+  tag: p
+  type: paragraph_close
diff --git a/tests/test_anchors.py b/tests/test_anchors.py
new file mode 100644
index 0000000..0515b92
--- /dev/null
+++ b/tests/test_anchors.py
@@ -0,0 +1,23 @@
+from pathlib import Path
+
+from markdown_it import MarkdownIt
+from markdown_it.utils import read_fixture_file
+import pytest
+
+from mdit_py_plugins.anchors import anchors_plugin
+
+FIXTURE_PATH = Path(__file__).parent
+
+
+@pytest.mark.parametrize(
+    "line,title,input,expected",
+    read_fixture_file(FIXTURE_PATH.joinpath("fixtures", "anchors.md")),
+)
+def test_fixtures(line, title, input, expected):
+    md = MarkdownIt("commonmark").use(
+        anchors_plugin,
+        permalink="(permalink" in title,
+        permalinkBefore="before)" in title,
+    )
+    text = md.render(input)
+    assert text.rstrip() == expected.rstrip()
diff --git a/tests/test_attrs.py b/tests/test_attrs.py
new file mode 100644
index 0000000..e4e9f0f
--- /dev/null
+++ b/tests/test_attrs.py
@@ -0,0 +1,20 @@
+from pathlib import Path
+
+from markdown_it import MarkdownIt
+from markdown_it.utils import read_fixture_file
+import pytest
+
+from mdit_py_plugins.attrs import attrs_plugin
+
+FIXTURE_PATH = Path(__file__).parent.joinpath("fixtures")
+
+
+@pytest.mark.parametrize(
+    "line,title,input,expected", read_fixture_file(FIXTURE_PATH / "attrs.md")
+)
+def test_attrs(line, title, input, expected):
+    md = MarkdownIt("commonmark").use(attrs_plugin, spans=True)
+    md.options["xhtmlOut"] = False
+    text = md.render(input)
+    print(text)
+    assert text.rstrip() == expected.rstrip()
diff --git a/tests/test_colon_fence.py b/tests/test_colon_fence.py
new file mode 100644
index 0000000..d520906
--- /dev/null
+++ b/tests/test_colon_fence.py
@@ -0,0 +1,36 @@
+from pathlib import Path
+from textwrap import dedent
+
+from markdown_it import MarkdownIt
+from markdown_it.utils import read_fixture_file
+import pytest
+
+from mdit_py_plugins.colon_fence import colon_fence_plugin
+
+FIXTURE_PATH = Path(__file__).parent.joinpath("fixtures", "colon_fence.md")
+
+
+@pytest.mark.parametrize("line,title,input,expected", read_fixture_file(FIXTURE_PATH))
+def test_fixtures(line, title, input, expected):
+    md = MarkdownIt("commonmark").use(colon_fence_plugin)
+    md.options["xhtmlOut"] = False
+    text = md.render(input)
+    try:
+        assert text.rstrip() == expected.rstrip()
+    except AssertionError:
+        print(text)
+        raise
+
+
+def test_plugin_parse(data_regression):
+    md = MarkdownIt().use(colon_fence_plugin)
+    tokens = md.parse(
+        dedent(
+            """\
+    ::: name
+    *content*
+    :::
+    """
+        )
+    )
+    data_regression.check([t.as_dict() for t in tokens])
diff --git a/tests/test_colon_fence/test_plugin_parse.yml b/tests/test_colon_fence/test_plugin_parse.yml
new file mode 100644
index 0000000..16c7303
--- /dev/null
+++ b/tests/test_colon_fence/test_plugin_parse.yml
@@ -0,0 +1,17 @@
+- attrs: null
+  block: true
+  children: null
+  content: '*content*
+
+    '
+  hidden: false
+  info: ' name'
+  level: 0
+  map:
+  - 0
+  - 3
+  markup: ':::'
+  meta: {}
+  nesting: 0
+  tag: code
+  type: colon_fence
diff --git a/tests/test_container.py b/tests/test_container.py
new file mode 100644
index 0000000..daf2ce6
--- /dev/null
+++ b/tests/test_container.py
@@ -0,0 +1,48 @@
+from pathlib import Path
+from textwrap import dedent
+
+from markdown_it import MarkdownIt
+from markdown_it.utils import read_fixture_file
+import pytest
+
+from mdit_py_plugins.container import container_plugin
+
+
+def test_plugin_parse(data_regression):
+    md = MarkdownIt().use(container_plugin, "name")
+    tokens = md.parse(
+        dedent(
+            """\
+    ::: name
+    *content*
+    :::
+    """
+        )
+    )
+    data_regression.check([t.as_dict() for t in tokens])
+
+
+def test_no_new_line_issue(data_regression):
+    """Fixed an IndexError when no newline on final line."""
+    md = MarkdownIt().use(container_plugin, "name")
+    tokens = md.parse(
+        dedent(
+            """\
+    ::: name
+    *content*
+    :::"""
+        )
+    )
+    data_regression.check([t.as_dict() for t in tokens])
+
+
+FIXTURE_PATH = Path(__file__).parent.joinpath("fixtures", "container.md")
+
+
+@pytest.mark.parametrize("line,title,input,expected", read_fixture_file(FIXTURE_PATH))
+def test_all(line, title, input, expected):
+    md = MarkdownIt("commonmark").use(container_plugin, "name")
+    md.options["xhtmlOut"] = False
+    text = md.render(input)
+    print(text)
+    assert text.rstrip() == expected.rstrip()
diff --git a/tests/test_container/test_no_new_line_issue.yml b/tests/test_container/test_no_new_line_issue.yml
new file mode 100644
index 0000000..c744be7
--- /dev/null
+++ b/tests/test_container/test_no_new_line_issue.yml
@@ -0,0 +1,110 @@
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ' name'
+  level: 0
+  map:
+  - 0
+  - 2
+  markup: ':::'
+  meta: {}
+  nesting: 1
+  tag: div
+  type: container_name_open
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 1
+  map:
+  - 1
+  - 2
+  markup: ''
+  meta: {}
+  nesting: 1
+  tag: p
+  type: paragraph_open
+- attrs: null
+  block: true
+  children:
+  - attrs: null
+    block: false
+    children: null
+    content: ''
+    hidden: false
+    info: ''
+    level: 0
+    map: null
+    markup: '*'
+    meta: {}
+    nesting: 1
+    tag: em
+    type: em_open
+  - attrs: null
+    block: false
+    children: null
+    content: content
+    hidden: false
+    info: ''
+    level: 1
+    map: null
+    markup: ''
+    meta: {}
+    nesting: 0
+    tag: ''
+    type: text
+  - attrs: null
+    block: false
+    children: null
+    content: ''
+    hidden: false
+    info: ''
+    level: 0
+    map: null
+    markup: '*'
+    meta: {}
+    nesting: -1
+    tag: em
+    type: em_close
+  content: '*content*'
+  hidden: false
+  info: ''
+  level: 2
+  map:
+  - 1
+  - 2
+  markup: ''
+  meta: {}
+  nesting: 0
+  tag: ''
+  type: inline
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 1
+  map: null
+  markup: ''
+  meta: {}
+  nesting: -1
+  tag: p
+  type: paragraph_close
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 0
+  map: null
+  markup: ':::'
+  meta: {}
+  nesting: -1
+  tag: div
+  type: container_name_close
diff --git a/tests/test_container/test_plugin_parse.yml b/tests/test_container/test_plugin_parse.yml
new file mode 100644
index 0000000..c744be7
--- /dev/null
+++ b/tests/test_container/test_plugin_parse.yml
@@ -0,0 +1,110 @@
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ' name'
+  level: 0
+  map:
+  - 0
+  - 2
+  markup: ':::'
+  meta: {}
+  nesting: 1
+  tag: div
+  type: container_name_open
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 1
+  map:
+  - 1
+  - 2
+  markup: ''
+  meta: {}
+  nesting: 1
+  tag: p
+  type: paragraph_open
+- attrs: null
+  block: true
+  children:
+  - attrs: null
+    block: false
+    children: null
+    content: ''
+    hidden: false
+    info: ''
+    level: 0
+    map: null
+    markup: '*'
+    meta: {}
+    nesting: 1
+    tag: em
+    type: em_open
+  - attrs: null
+    block: false
+    children: null
+    content: content
+    hidden: false
+    info: ''
+    level: 1
+    map: null
+    markup: ''
+    meta: {}
+    nesting: 0
+    tag: ''
+    type: text
+  - attrs: null
+    block: false
+    children: null
+    content: ''
+    hidden: false
+    info: ''
+    level: 0
+    map: null
+    markup: '*'
+    meta: {}
+    nesting: -1
+    tag: em
+    type: em_close
+  content: '*content*'
+  hidden: false
+  info: ''
+  level: 2
+  map:
+  - 1
+  - 2
+  markup: ''
+  meta: {}
+  nesting: 0
+  tag: ''
+  type: inline
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 1
+  map: null
+  markup: ''
+  meta: {}
+  nesting: -1
+  tag: p
+  type: paragraph_close
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 0
+  map: null
+  markup: ':::'
+  meta: {}
+  nesting: -1
+  tag: div
+  type: container_name_close
diff --git a/tests/test_deflist.py b/tests/test_deflist.py
new file mode 100644
index 0000000..d924e93
--- /dev/null
+++ b/tests/test_deflist.py
@@ -0,0 +1,37 @@
+from pathlib import Path
+from textwrap import dedent
+
+from markdown_it import MarkdownIt
+from markdown_it.utils import read_fixture_file
+import pytest
+
+from mdit_py_plugins.deflist import deflist_plugin
+
+FIXTURE_PATH = Path(__file__).parent.joinpath("fixtures", "deflist.md")
+
+
+def test_plugin_parse(data_regression):
+    md = MarkdownIt().use(deflist_plugin)
+    tokens = md.parse(
+        dedent(
+            """\
+    Term 1
+
+    : Definition 1
+
+    Term 2
+      ~ Definition 2a
+      ~ Definition 2b
+    """
+        )
+    )
+    data_regression.check([t.as_dict() for t in tokens])
+
+
+@pytest.mark.parametrize("line,title,input,expected", read_fixture_file(FIXTURE_PATH))
+def test_all(line, title, input, expected):
+    md = MarkdownIt("commonmark").use(deflist_plugin)
+    md.options["xhtmlOut"] = False
+    text = md.render(input)
+    print(text)
+    assert text.rstrip() == expected.rstrip()
diff --git a/tests/test_deflist/test_plugin_parse.yml b/tests/test_deflist/test_plugin_parse.yml
new file mode 100644
index 0000000..3202c2d
--- /dev/null
+++ b/tests/test_deflist/test_plugin_parse.yml
@@ -0,0 +1,392 @@
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 0
+  map:
+  - 0
+  - 7
+  markup: ''
+  meta: {}
+  nesting: 1
+  tag: dl
+  type: dl_open
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 1
+  map:
+  - 0
+  - 0
+  markup: ''
+  meta: {}
+  nesting: 1
+  tag: dt
+  type: dt_open
+- attrs: null
+  block: true
+  children:
+  - attrs: null
+    block: false
+    children: null
+    content: Term 1
+    hidden: false
+    info: ''
+    level: 0
+    map: null
+    markup: ''
+    meta: {}
+    nesting: 0
+    tag: ''
+    type: text
+  content: Term 1
+  hidden: false
+  info: ''
+  level: 2
+  map:
+  - 0
+  - 0
+  markup: ''
+  meta: {}
+  nesting: 0
+  tag: ''
+  type: inline
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 1
+  map: null
+  markup: ''
+  meta: {}
+  nesting: -1
+  tag: dt
+  type: dt_close
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 1
+  map:
+  - 2
+  - 4
+  markup: ''
+  meta: {}
+  nesting: 1
+  tag: dd
+  type: dd_open
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: true
+  info: ''
+  level: 2
+  map:
+  - 2
+  - 3
+  markup: ''
+  meta: {}
+  nesting: 1
+  tag: p
+  type: paragraph_open
+- attrs: null
+  block: true
+  children:
+  - attrs: null
+    block: false
+    children: null
+    content: Definition 1
+    hidden: false
+    info: ''
+    level: 0
+    map: null
+    markup: ''
+    meta: {}
+    nesting: 0
+    tag: ''
+    type: text
+  content: Definition 1
+  hidden: false
+  info: ''
+  level: 3
+  map:
+  - 2
+  - 3
+  markup: ''
+  meta: {}
+  nesting: 0
+  tag: ''
+  type: inline
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: true
+  info: ''
+  level: 2
+  map: null
+  markup: ''
+  meta: {}
+  nesting: -1
+  tag: p
+  type: paragraph_close
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 1
+  map: null
+  markup: ''
+  meta: {}
+  nesting: -1
+  tag: dd
+  type: dd_close
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 1
+  map:
+  - 4
+  - 4
+  markup: ''
+  meta: {}
+  nesting: 1
+  tag: dt
+  type: dt_open
+- attrs: null
+  block: true
+  children:
+  - attrs: null
+    block: false
+    children: null
+    content: Term 2
+    hidden: false
+    info: ''
+    level: 0
+    map: null
+    markup: ''
+    meta: {}
+    nesting: 0
+    tag: ''
+    type: text
+  content: Term 2
+  hidden: false
+  info: ''
+  level: 2
+  map:
+  - 4
+  - 4
+  markup: ''
+  meta: {}
+  nesting: 0
+  tag: ''
+  type: inline
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 1
+  map: null
+  markup: ''
+  meta: {}
+  nesting: -1
+  tag: dt
+  type: dt_close
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 1
+  map:
+  - 4
+  - 6
+  markup: ''
+  meta: {}
+  nesting: 1
+  tag: dd
+  type: dd_open
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: true
+  info: ''
+  level: 2
+  map:
+  - 5
+  - 6
+  markup: ''
+  meta: {}
+  nesting: 1
+  tag: p
+  type: paragraph_open
+- attrs: null
+  block: true
+  children:
+  - attrs: null
+    block: false
+    children: null
+    content: Definition 2a
+    hidden: false
+    info: ''
+    level: 0
+    map: null
+    markup: ''
+    meta: {}
+    nesting: 0
+    tag: ''
+    type: text
+  content: Definition 2a
+  hidden: false
+  info: ''
+  level: 3
+  map:
+  - 5
+  - 6
+  markup: ''
+  meta: {}
+  nesting: 0
+  tag: ''
+  type: inline
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: true
+  info: ''
+  level: 2
+  map: null
+  markup: ''
+  meta: {}
+  nesting: -1
+  tag: p
+  type: paragraph_close
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 1
+  map: null
+  markup: ''
+  meta: {}
+  nesting: -1
+  tag: dd
+  type: dd_close
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 1
+  map:
+  - 6
+  - 7
+  markup: ''
+  meta: {}
+  nesting: 1
+  tag: dd
+  type: dd_open
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: true
+  info: ''
+  level: 2
+  map:
+  - 6
+  - 7
+  markup: ''
+  meta: {}
+  nesting: 1
+  tag: p
+  type: paragraph_open
+- attrs: null
+  block: true
+  children:
+  - attrs: null
+    block: false
+    children: null
+    content: Definition 2b
+    hidden: false
+    info: ''
+    level: 0
+    map: null
+    markup: ''
+    meta: {}
+    nesting: 0
+    tag: ''
+    type: text
+  content: Definition 2b
+  hidden: false
+  info: ''
+  level: 3
+  map:
+  - 6
+  - 7
+  markup: ''
+  meta: {}
+  nesting: 0
+  tag: ''
+  type: inline
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: true
+  info: ''
+  level: 2
+  map: null
+  markup: ''
+  meta: {}
+  nesting: -1
+  tag: p
+  type: paragraph_close
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 1
+  map: null
+  markup: ''
+  meta: {}
+  nesting: -1
+  tag: dd
+  type: dd_close
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 0
+  map: null
+  markup: ''
+  meta: {}
+  nesting: -1
+  tag: dl
+  type: dl_close
diff --git a/tests/test_dollarmath.py b/tests/test_dollarmath.py
new file mode 100644
index 0000000..9f88726
--- /dev/null
+++ b/tests/test_dollarmath.py
@@ -0,0 +1,96 @@
+from pathlib import Path
+from textwrap import dedent
+
+from markdown_it import MarkdownIt
+from markdown_it.rules_block import StateBlock
+from markdown_it.rules_inline import StateInline
+from markdown_it.utils import read_fixture_file
+import pytest
+
+from mdit_py_plugins.dollarmath import dollarmath_plugin
+from mdit_py_plugins.dollarmath import index as main
+
+FIXTURE_PATH = Path(__file__).parent.joinpath("fixtures")
+
+
+def test_inline_func():
+
+    inline_func = main.math_inline_dollar()
+
+    md = MarkdownIt()
+    src = r"$a=1$ $b=2$"
+    tokens = []
+    state = StateInline(src, md, {}, tokens)
+    inline_func(state, False)
+    assert tokens[0].as_dict() == {
+        "type": "math_inline",
+        "tag": "math",
+        "nesting": 0,
+        "attrs": None,
+        "map": None,
+        "level": 0,
+        "children": None,
+        "content": "a=1",
+        "markup": "$",
+        "info": "",
+        "meta": {},
+        "block": False,
+        "hidden": False,
+    }
+    assert state.pos == 5
+
+
+def test_block_func():
+    block_func = main.math_block_dollar()
+    md = MarkdownIt()
+    src = r"$$\na=1\n\nc\nb=2$$ (abc)"
+    tokens = []
+    state = StateBlock(src, md, {}, tokens)
+    block_func(state, 0, 10, False)
+    print(tokens[0].as_dict())
+    assert tokens[0].as_dict() == {
+        "type": "math_block_label",
+        "tag": "math",
+        "nesting": 0,
+        "attrs": None,
+        "map": [0, 1],
+        "level": 0,
+        "children": None,
+        "content": "\\na=1\\n\\nc\\nb=2",
+        "markup": "$$",
+        "info": "abc",
+        "meta": {},
+        "block": True,
+        "hidden": False,
+    }
+
+
+def test_plugin_parse(data_regression):
+    md = MarkdownIt().use(dollarmath_plugin)
+    tokens = md.parse(
+        dedent(
+            """\
+    $$
+    a=1
+    b=2
+    $$ (abc)
+
+    - ab $c=1$ d
+    """
+        )
+    )
+    data_regression.check([t.as_dict() for t in tokens])
+
+
+@pytest.mark.parametrize(
+    "line,title,input,expected",
+    read_fixture_file(FIXTURE_PATH.joinpath("dollar_math.md")),
+)
+def test_dollarmath_fixtures(line, title, input, expected):
+    md = MarkdownIt("commonmark").use(
+        dollarmath_plugin, allow_space=False, allow_digits=False, double_inline=True
+    )
+    md.options.xhtmlOut = False
+    text = md.render(input)
+    print(text)
+    assert text.rstrip() == expected.rstrip()
diff --git a/tests/test_dollarmath/test_plugin_parse.yml b/tests/test_dollarmath/test_plugin_parse.yml
new file mode 100644
index 0000000..789cbe7
--- /dev/null
+++ b/tests/test_dollarmath/test_plugin_parse.yml
@@ -0,0 +1,159 @@
+- attrs: null
+  block: true
+  children: null
+  content: '
+
+    a=1
+
+    b=2
+
+    '
+  hidden: false
+  info: abc
+  level: 0
+  map:
+  - 0
+  - 4
+  markup: $$
+  meta: {}
+  nesting: 0
+  tag: math
+  type: math_block_label
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 0
+  map:
+  - 5
+  - 6
+  markup: '-'
+  meta: {}
+  nesting: 1
+  tag: ul
+  type: bullet_list_open
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 1
+  map:
+  - 5
+  - 6
+  markup: '-'
+  meta: {}
+  nesting: 1
+  tag: li
+  type: list_item_open
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: true
+  info: ''
+  level: 2
+  map:
+  - 5
+  - 6
+  markup: ''
+  meta: {}
+  nesting: 1
+  tag: p
+  type: paragraph_open
+- attrs: null
+  block: true
+  children:
+  - attrs: null
+    block: false
+    children: null
+    content: 'ab '
+    hidden: false
+    info: ''
+    level: 0
+    map: null
+    markup: ''
+    meta: {}
+    nesting: 0
+    tag: ''
+    type: text
+  - attrs: null
+    block: false
+    children: null
+    content: c=1
+    hidden: false
+    info: ''
+    level: 0
+    map: null
+    markup: $
+    meta: {}
+    nesting: 0
+    tag: math
+    type: math_inline
+  - attrs: null
+    block: false
+    children: null
+    content: ' d'
+    hidden: false
+    info: ''
+    level: 0
+    map: null
+    markup: ''
+    meta: {}
+    nesting: 0
+    tag: ''
+    type: text
+  content: ab $c=1$ d
+  hidden: false
+  info: ''
+  level: 3
+  map:
+  - 5
+  - 6
+  markup: ''
+  meta: {}
+  nesting: 0
+  tag: ''
+  type: inline
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: true
+  info: ''
+  level: 2
+  map: null
+  markup: ''
+  meta: {}
+  nesting: -1
+  tag: p
+  type: paragraph_close
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 1
+  map: null
+  markup: '-'
+  meta: {}
+  nesting: -1
+  tag: li
+  type: list_item_close
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 0
+  map: null
+  markup: '-'
+  meta: {}
+  nesting: -1
+  tag: ul
+  type: bullet_list_close
diff --git a/tests/test_field_list.py b/tests/test_field_list.py
new file mode 100644
index 0000000..cf00ae9
--- /dev/null
+++ b/tests/test_field_list.py
@@ -0,0 +1,32 @@
+from pathlib import Path
+from textwrap import dedent
+
+from markdown_it import MarkdownIt
+from markdown_it.utils import read_fixture_file
+import pytest
+
+from mdit_py_plugins.field_list import fieldlist_plugin
+
+FIXTURE_PATH = Path(__file__).parent.joinpath("fixtures", "field_list.md")
+
+
+def test_plugin_parse(data_regression):
+    md = MarkdownIt().use(fieldlist_plugin)
+    tokens = md.parse(
+        dedent(
+            """\
+    :abc: Content
+    :def: Content
+    """
+        )
+    )
+    data_regression.check([t.as_dict() for t in tokens])
+
+
+@pytest.mark.parametrize("line,title,input,expected", read_fixture_file(FIXTURE_PATH))
+def test_all(line, title, input, expected):
+    md = MarkdownIt("commonmark").use(fieldlist_plugin)
+    md.options["xhtmlOut"] = False
+    text = md.render(input)
+    print(text)
+    assert text.rstrip() == expected.rstrip()
diff --git a/tests/test_field_list/test_plugin_parse.yml b/tests/test_field_list/test_plugin_parse.yml
new file mode 100644
index 0000000..c188c03
--- /dev/null
+++ b/tests/test_field_list/test_plugin_parse.yml
@@ -0,0 +1,310 @@
+- attrs:
+  - - class
+    - field-list
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 0
+  map:
+  - 0
+  - 2
+  markup: ''
+  meta: {}
+  nesting: 1
+  tag: dl
+  type: field_list_open
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 1
+  map:
+  - 0
+  - 0
+  markup: ''
+  meta: {}
+  nesting: 1
+  tag: dt
+  type: fieldlist_name_open
+- attrs: null
+  block: true
+  children:
+  - attrs: null
+    block: false
+    children: null
+    content: abc
+    hidden: false
+    info: ''
+    level: 0
+    map: null
+    markup: ''
+    meta: {}
+    nesting: 0
+    tag: ''
+    type: text
+  content: abc
+  hidden: false
+  info: ''
+  level: 2
+  map:
+  - 0
+  - 0
+  markup: ''
+  meta: {}
+  nesting: 0
+  tag: ''
+  type: inline
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 1
+  map: null
+  markup: ''
+  meta: {}
+  nesting: -1
+  tag: dt
+  type: fieldlist_name_close
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 1
+  map:
+  - 0
+  - 1
+  markup: ''
+  meta: {}
+  nesting: 1
+  tag: dd
+  type: fieldlist_body_open
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 2
+  map:
+  - 0
+  - 1
+  markup: ''
+  meta: {}
+  nesting: 1
+  tag: p
+  type: paragraph_open
+- attrs: null
+  block: true
+  children:
+  - attrs: null
+    block: false
+    children: null
+    content: Content
+    hidden: false
+    info: ''
+    level: 0
+    map: null
+    markup: ''
+    meta: {}
+    nesting: 0
+    tag: ''
+    type: text
+  content: Content
+  hidden: false
+  info: ''
+  level: 3
+  map:
+  - 0
+  - 1
+  markup: ''
+  meta: {}
+  nesting: 0
+  tag: ''
+  type: inline
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 2
+  map: null
+  markup: ''
+  meta: {}
+  nesting: -1
+  tag: p
+  type: paragraph_close
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 1
+  map: null
+  markup: ''
+  meta: {}
+  nesting: -1
+  tag: dd
+  type: fieldlist_body_close
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 1
+  map:
+  - 1
+  - 1
+  markup: ''
+  meta: {}
+  nesting: 1
+  tag: dt
+  type: fieldlist_name_open
+- attrs: null
+  block: true
+  children:
+  - attrs: null
+    block: false
+    children: null
+    content: def
+    hidden: false
+    info: ''
+    level: 0
+    map: null
+    markup: ''
+    meta: {}
+    nesting: 0
+    tag: ''
+    type: text
+  content: def
+  hidden: false
+  info: ''
+  level: 2
+  map:
+  - 1
+  - 1
+  markup: ''
+  meta: {}
+  nesting: 0
+  tag: ''
+  type: inline
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 1
+  map: null
+  markup: ''
+  meta: {}
+  nesting: -1
+  tag: dt
+  type: fieldlist_name_close
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 1
+  map:
+  - 1
+  - 2
+  markup: ''
+  meta: {}
+  nesting: 1
+  tag: dd
+  type: fieldlist_body_open
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 2
+  map:
+  - 1
+  - 2
+  markup: ''
+  meta: {}
+  nesting: 1
+  tag: p
+  type: paragraph_open
+- attrs: null
+  block: true
+  children:
+  - attrs: null
+    block: false
+    children: null
+    content: Content
+    hidden: false
+    info: ''
+    level: 0
+    map: null
+    markup: ''
+    meta: {}
+    nesting: 0
+    tag: ''
+    type: text
+  content: Content
+  hidden: false
+  info: ''
+  level: 3
+  map:
+  - 1
+  - 2
+  markup: ''
+  meta: {}
+  nesting: 0
+  tag: ''
+  type: inline
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 2
+  map: null
+  markup: ''
+  meta: {}
+  nesting: -1
+  tag: p
+  type: paragraph_close
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 1
+  map: null
+  markup: ''
+  meta: {}
+  nesting: -1
+  tag: dd
+  type: fieldlist_body_close
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 0
+  map: null
+  markup: ''
+  meta: {}
+  nesting: -1
+  tag: dl
+  type: field_list_close
diff --git a/tests/test_footnote.py b/tests/test_footnote.py
new file mode 100644
index 0000000..c662cb6
--- /dev/null
+++ b/tests/test_footnote.py
@@ -0,0 +1,462 @@
+from pathlib import Path
+from textwrap import dedent
+
+from markdown_it import MarkdownIt
+from markdown_it.rules_block import StateBlock
+from markdown_it.rules_inline import StateInline
+from markdown_it.token import Token
+from markdown_it.utils import read_fixture_file
+import pytest
+
+from mdit_py_plugins.footnote import footnote_plugin, index
+
+FIXTURE_PATH = Path(__file__).parent.joinpath("fixtures", "footnote.md")
+
+
+def test_footnote_def():
+
+    md = MarkdownIt()
+    src = r"[^a]: xyz"
+    tokens = []
+    state = StateBlock(src, md, {}, tokens)
+    index.footnote_def(state, 0, 1, False)
+    assert [t.as_dict() for t in tokens] == [
+        {
+            "type": "footnote_reference_open",
+            "tag": "",
+            "nesting": 1,
+            "attrs": None,
+            "map": [0, 1],
+            "level": 0,
+            "children": None,
+            "content": "",
+            "markup": "",
+            "info": "",
+            "meta": {"label": "a"},
+            "block": False,
+            "hidden": False,
+        },
+        {
+            "type": "paragraph_open",
+            "tag": "p",
+            "nesting": 1,
+            "attrs": None,
+            "map": [0, 1],
+            "level": 1,
+            "children": None,
+            "content": "",
+            "markup": "",
+            "info": "",
+            "meta": {},
+            "block": True,
+            "hidden": False,
+        },
+        {
+            "type": "inline",
+            "tag": "",
+            "nesting": 0,
+            "attrs": None,
+            "map": [0, 1],
+            "level": 2,
+            "children": [],
+            "content": "xyz",
+            "markup": "",
+            "info": "",
+            "meta": {},
+            "block": True,
+            "hidden": False,
+        },
+        {
+            "type": "paragraph_close",
+            "tag": "p",
+            "nesting": -1,
+            "attrs": None,
+            "map": None,
+            "level": 1,
+            "children": None,
+            "content": "",
+            "markup": "",
+            "info": "",
+            "meta": {},
+            "block": True,
+            "hidden": False,
+        },
+        {
+            "type": "footnote_reference_close",
+            "tag": "",
+            "nesting": -1,
+            "attrs": None,
+            "map": None,
+            "level": 0,
+            "children": None,
+            "content": "",
+            "markup": "",
+            "info": "",
+            "meta": {},
+            "block": False,
+            "hidden": False,
+        },
+    ]
+    assert state.env == {"footnotes": {"refs": {":a": -1}}}
+
+
+def test_footnote_ref():
+
+    md = MarkdownIt()
+    src = r"[^a]"
+    tokens = []
+    state = StateInline(src, md, {}, tokens)
+    state.env = {"footnotes": {"refs": {":a": -1}}}
+    index.footnote_ref(state, False)
+    # print([t.as_dict() for t in tokens])
+    assert [t.as_dict() for t in tokens] == [
+        {
+            "type": "footnote_ref",
+            "tag": "",
+            "nesting": 0,
+            "attrs": None,
+            "map": None,
+            "level": 0,
+            "children": None,
+            "content": "",
+            "markup": "",
+            "info": "",
+            "meta": {"id": 0, "subId": 0, "label": "a"},
+            "block": False,
+            "hidden": False,
+        }
+    ]
+    assert state.env == {
+        "footnotes": {"refs": {":a": 0}, "list": {0: {"label": "a", "count": 1}}}
+    }
+
+
+def test_footnote_inline():
+
+    md = MarkdownIt().use(footnote_plugin)
+    src = r"^[a]"
+    tokens = []
+    state = StateInline(src, md, {}, tokens)
+    state.env = {"footnotes": {"refs": {":a": -1}}}
+    index.footnote_inline(state, False)
+    # print([t.as_dict() for t in tokens])
+    assert [t.as_dict() for t in tokens] == [
+        {
+            "type": "footnote_ref",
+            "tag": "",
+            "nesting": 0,
+            "attrs": None,
+            "map": None,
+            "level": 0,
+            "children": None,
+            "content": "",
+            "markup": "",
+            "info": "",
+            "meta": {"id": 0},
+            "block": False,
+            "hidden": False,
+        }
+    ]
+    assert state.env == {
+        "footnotes": {
+            "refs": {":a": -1},
+            "list": {
+                0: {
+                    "content": "a",
+                    "tokens": [
+                        Token(
+                            type="text",
+                            tag="",
+                            nesting=0,
+                            attrs=None,
+                            map=None,
+                            level=0,
+                            children=None,
+                            content="a",
+                            markup="",
+                            info="",
+                            meta={},
+                            block=False,
+                            hidden=False,
+                        )
+                    ],
+                }
+            },
+        }
+    }
+
+
+def test_footnote_tail():
+    md = MarkdownIt()
+
+    tokens = [
+        Token(
+            **{
+                "type": "footnote_reference_open",
+                "tag": "",
+                "nesting": 1,
+                "attrs": None,
+                "map": None,
+                "level": 0,
+                "children": None,
+                "content": "",
+                "markup": "",
+                "info": "",
+                "meta": {"label": "a"},
+                "block": False,
+                "hidden": False,
+            }
+        ),
+        Token(
+            **{
+                "type": "paragraph_open",
+                "tag": "p",
+                "nesting": 1,
+                "attrs": None,
+                "map": [0, 1],
+                "level": 1,
+                "children": None,
+                "content": "",
+                "markup": "",
+                "info": "",
+                "meta": {},
+                "block": True,
+                "hidden": False,
+            }
+        ),
+        Token(
+            **{
+                "type": "inline",
+                "tag": "",
+                "nesting": 0,
+                "attrs": None,
+                "map": [0, 1],
+                "level": 2,
+                "children": [],
+                "content": "xyz",
+                "markup": "",
+                "info": "",
+                "meta": {},
+                "block": True,
+                "hidden": False,
+            }
+        ),
+        Token(
+            **{
+                "type": "paragraph_close",
+                "tag": "p",
+                "nesting": -1,
+                "attrs": None,
+                "map": None,
+                "level": 1,
+                "children": None,
+                "content": "",
+                "markup": "",
+                "info": "",
+                "meta": {},
+                "block": True,
+                "hidden": False,
+            }
+        ),
+        Token(
+            **{
+                "type": "footnote_reference_close",
+                "tag": "",
+                "nesting": -1,
+                "attrs": None,
+                "map": None,
+                "level": 0,
+                "children": None,
+                "content": "",
+                "markup": "",
+                "info": "",
+                "meta": {},
+                "block": False,
+                "hidden": False,
+            }
+        ),
+        Token("other", "", 0),
+    ]
+    env = {"footnotes": {"refs": {":a": 0}, "list": {0: {"label": "a", "count": 1}}}}
+    state = StateBlock("", md, env, tokens)
+    index.footnote_tail(state)
+    assert state.tokens == [
+        Token(
+            type="other",
+            tag="",
+            nesting=0,
+            attrs=None,
+            map=None,
+            level=0,
+            children=None,
+            content="",
+            markup="",
+            info="",
+            meta={},
+            block=False,
+            hidden=False,
+        ),
+        Token(
+            type="footnote_block_open",
+            tag="",
+            nesting=1,
+            attrs=None,
+            map=None,
+            level=0,
+            children=None,
+            content="",
+            markup="",
+            info="",
+            meta={},
+            block=False,
+            hidden=False,
+        ),
+        Token(
+            type="footnote_open",
+            tag="",
+            nesting=1,
+            attrs=None,
+            map=None,
+            level=0,
+            children=None,
+            content="",
+            markup="",
+            info="",
+            meta={"id": 0, "label": "a"},
+            block=False,
+            hidden=False,
+        ),
+        Token(
+            type="paragraph_open",
+            tag="p",
+            nesting=1,
+            attrs=None,
+            map=[0, 1],
+            level=1,
+            children=None,
+            content="",
+            markup="",
+            info="",
+            meta={},
+            block=True,
+            hidden=False,
+        ),
+        Token(
+            type="inline",
+            tag="",
+            nesting=0,
+            attrs=None,
+            map=[0, 1],
+            level=2,
+            children=[],
+            content="xyz",
+            markup="",
+            info="",
+            meta={},
+            block=True,
+            hidden=False,
+        ),
+        Token(
+            type="footnote_anchor",
+            tag="",
+            nesting=0,
+            attrs=None,
+            map=None,
+            level=0,
+            children=None,
+            content="",
+            markup="",
+            info="",
+            meta={"id": 0, "subId": 0, "label": "a"},
+            block=False,
+            hidden=False,
+        ),
+        Token(
+            type="paragraph_close",
+            tag="p",
+            nesting=-1,
+            attrs=None,
+            map=None,
+            level=1,
+            children=None,
+            content="",
+            markup="",
+            info="",
+            meta={},
+            block=True,
+            hidden=False,
+        ),
+        Token(
+            type="footnote_close",
+            tag="",
+            nesting=-1,
+            attrs=None,
+            map=None,
+            level=0,
+            children=None,
+            content="",
+            markup="",
+            info="",
+            meta={},
+            block=False,
+            hidden=False,
+        ),
+        Token(
+            type="footnote_block_close",
+            tag="",
+            nesting=-1,
+            attrs=None,
+            map=None,
+            level=0,
+            children=None,
+            content="",
+            markup="",
+            info="",
+            meta={},
+            block=False,
+            hidden=False,
+        ),
+    ]
+
+
+def test_plugin_render():
+    md = MarkdownIt().use(footnote_plugin)
+    text = md.render(
+        dedent(
+            """\
+    [^1] ^[a] [^a] [^a]
+
+    [^1]: abc
+    [^a]: xyz
+    """
+        )
+    )
+    assert text == (
+        dedent(
+            """\
+    <p><sup class="footnote-ref"><a href="#fn1" id="fnref1">[1]</a></sup> <sup class="footnote-ref"><a href="#fn2" id="fnref2">[2]</a></sup> <sup class="footnote-ref"><a href="#fn3" id="fnref3">[3]</a></sup> <sup class="footnote-ref"><a href="#fn3" id="fnref3:1">[3:1]</a></sup></p>
+    <hr class="footnotes-sep" />
+    <section class="footnotes">
+    <ol class="footnotes-list">
+    <li id="fn1" class="footnote-item"><p>abc <a href="#fnref1" class="footnote-backref">↩︎</a></p>
+    </li>
+    <li id="fn2" class="footnote-item"><p>a <a href="#fnref2" class="footnote-backref">↩︎</a></p>
+    </li>
+    <li id="fn3" class="footnote-item"><p>xyz <a href="#fnref3" class="footnote-backref">↩︎</a> <a href="#fnref3:1" class="footnote-backref">↩︎</a></p>
+    </li>
+    </ol>
+    </section>
+    """  # noqa: E501
+        )
+    )
+
+
+@pytest.mark.parametrize("line,title,input,expected", read_fixture_file(FIXTURE_PATH))
+def test_all(line, title, input, expected):
+    md = MarkdownIt("commonmark").use(footnote_plugin)
+    md.options["xhtmlOut"] = False
+    text = md.render(input)
+    print(text)
+    assert text.rstrip().replace("↩︎", "<-").replace(
+        "↩", "<-"
+    ) == expected.rstrip().replace("↩︎", "<-").replace("↩", "<-")
diff --git a/tests/test_front_matter.py b/tests/test_front_matter.py
new file mode 100644
index 0000000..627cb89
--- /dev/null
+++ b/tests/test_front_matter.py
@@ -0,0 +1,49 @@
+from pathlib import Path
+
+from markdown_it import MarkdownIt
+from markdown_it.token import Token
+from markdown_it.utils import read_fixture_file
+import pytest
+
+from mdit_py_plugins.front_matter import front_matter_plugin
+
+FIXTURE_PATH = Path(__file__).parent.joinpath("fixtures", "front_matter.md")
+
+
+@pytest.mark.parametrize("line,title,input,expected", read_fixture_file(FIXTURE_PATH))
+def test_all(line, title, input, expected):
+    md = MarkdownIt("commonmark").use(front_matter_plugin)
+    md.options["xhtmlOut"] = False
+    text = md.render(input)
+    print(text)
+    assert text.rstrip() == expected.rstrip()
+
+
+def test_token():
+    md = MarkdownIt("commonmark").use(front_matter_plugin)
+    tokens = md.parse("---\na: 1\n---")
+    # print(tokens)
+    assert tokens == [
+        Token(
+            type="front_matter",
+            tag="",
+            nesting=0,
+            attrs=None,
+            map=[0, 3],
+            level=0,
+            children=None,
+            content="a: 1",
+            markup="---",
+            info="",
+            meta={},
+            block=True,
+            hidden=True,
+        )
+    ]
+
+
+def test_short_source():
+    md = MarkdownIt("commonmark").use(front_matter_plugin)
+
+    # The code should not raise an IndexError.
+    assert md.parse("-")
diff --git a/tests/test_myst_block.py b/tests/test_myst_block.py
new file mode 100644
index 0000000..632ed4b
--- /dev/null
+++ b/tests/test_myst_block.py
@@ -0,0 +1,79 @@
+from pathlib import Path
+
+from markdown_it import MarkdownIt
+from markdown_it.token import Token
+from markdown_it.utils import read_fixture_file
+import pytest
+
+from mdit_py_plugins.myst_blocks import myst_block_plugin
+
+FIXTURE_PATH = Path(__file__).parent.joinpath("fixtures", "myst_block.md")
+
+
+@pytest.mark.parametrize("line,title,input,expected", read_fixture_file(FIXTURE_PATH))
+def test_all(line, title, input, expected):
+    md = MarkdownIt("commonmark").use(myst_block_plugin)
+    md.options["xhtmlOut"] = False
+    text = md.render(input)
+    print(text)
+    assert text.rstrip() == expected.rstrip()
+
+
+def test_block_token():
+    md = MarkdownIt("commonmark").use(myst_block_plugin)
+    tokens = md.parse("+++")
+    expected_token = Token(
+        type="myst_block_break",
+        tag="hr",
+        nesting=0,
+        map=[0, 1],
+        level=0,
+        children=None,
+        content="",
+        markup="+++",
+        info="",
+        meta={},
+        block=True,
+        hidden=False,
+    )
+    expected_token.attrSet("class", "myst-block")
+    assert tokens == [expected_token]
+
+    tokens = md.parse("\n+ + + abc")
+    expected_token = Token(
+        type="myst_block_break",
+        tag="hr",
+        nesting=0,
+        map=[1, 2],
+        level=0,
+        children=None,
+        content="abc",
+        markup="+++",
+        info="",
+        meta={},
+        block=True,
+        hidden=False,
+    )
+    expected_token.attrSet("class", "myst-block")
+    assert tokens == [expected_token]
+
+
+def test_comment_token():
+    md = MarkdownIt("commonmark").use(myst_block_plugin)
+    tokens = md.parse("\n\n% abc \n%def")
+    expected_token = Token(
+        type="myst_line_comment",
+        tag="",
+        nesting=0,
+        map=[2, 4],
+        level=0,
+        children=None,
+        content=" abc\ndef",
+        markup="%",
+        info="",
+        meta={},
+        block=True,
+        hidden=False,
+    )
+    expected_token.attrSet("class", "myst-line-comment")
+    assert tokens == [expected_token]
diff --git a/tests/test_myst_role.py b/tests/test_myst_role.py
new file mode 100644
index 0000000..f70e3f8
--- /dev/null
+++ b/tests/test_myst_role.py
@@ -0,0 +1,89 @@
+from pathlib import Path
+
+from markdown_it import MarkdownIt
+from markdown_it.token import Token
+from markdown_it.utils import read_fixture_file
+import pytest
+
+from mdit_py_plugins.myst_role import myst_role_plugin
+
+FIXTURE_PATH = Path(__file__).parent.joinpath("fixtures", "myst_role.md")
+
+
+def test_basic():
+    md = MarkdownIt().use(myst_role_plugin)
+    src = "{abc}``` a ```"
+    tokens = md.parse(src)
+    print(tokens)
+    assert tokens == [
+        Token(
+            type="paragraph_open",
+            tag="p",
+            nesting=1,
+            attrs=None,
+            map=[0, 1],
+            level=0,
+            children=None,
+            content="",
+            markup="",
+            info="",
+            meta={},
+            block=True,
+            hidden=False,
+        ),
+        Token(
+            type="inline",
+            tag="",
+            nesting=0,
+            attrs=None,
+            map=[0, 1],
+            level=1,
+            children=[
+                Token(
+                    type="myst_role",
+                    tag="",
+                    nesting=0,
+                    attrs=None,
+                    map=None,
+                    level=0,
+                    children=None,
+                    content=" a ",
+                    markup="",
+                    info="",
+                    meta={"name": "abc"},
+                    block=False,
+                    hidden=False,
+                )
+            ],
+            content="{abc}``` a ```",
+            markup="",
+            info="",
+            meta={},
+            block=True,
+            hidden=False,
+        ),
+        Token(
+            type="paragraph_close",
+            tag="p",
+            nesting=-1,
+            attrs=None,
+            map=None,
+            level=0,
+            children=None,
+            content="",
+            markup="",
+            info="",
+            meta={},
+            block=True,
+            hidden=False,
+        ),
+    ]
+
+
+@pytest.mark.parametrize("line,title,input,expected", read_fixture_file(FIXTURE_PATH))
+def test_all(line, title, input, expected):
+    md = MarkdownIt("commonmark").use(myst_role_plugin)
+    md.options["xhtmlOut"] = False
+    text = md.render(input)
+    print(text)
+    assert text.rstrip() == expected.rstrip()
diff --git a/tests/test_substitution.py b/tests/test_substitution.py
new file mode 100644
index 0000000..706c1e2
--- /dev/null
+++ b/tests/test_substitution.py
@@ -0,0 +1,33 @@
+from pathlib import Path
+from textwrap import dedent
+
+from markdown_it import MarkdownIt
+from markdown_it.utils import read_fixture_file
+import pytest
+
+# from markdown_it.token import Token
+from mdit_py_plugins.substitution import substitution_plugin
+
+FIXTURE_PATH = Path(__file__).parent.joinpath("fixtures", "substitution.md")
+
+
+@pytest.mark.parametrize("line,title,input,expected", read_fixture_file(FIXTURE_PATH))
+def test_fixtures(line, title, input, expected):
+    md = MarkdownIt("commonmark").enable("table").use(substitution_plugin)
+    text = md.render(input)
+    print(text)
+    assert text.rstrip() == expected.rstrip()
+
+
+def test_tokens(data_regression):
+    md = MarkdownIt().use(substitution_plugin)
+    tokens = md.parse(
+        dedent(
+            """\
+    {{ block }}
+
+    a {{ inline }} b
+    """
+        )
+    )
+    data_regression.check([t.as_dict() for t in tokens])
diff --git a/tests/test_substitution/test_tokens.yml b/tests/test_substitution/test_tokens.yml
new file mode 100644
index 0000000..a3179d2
--- /dev/null
+++ b/tests/test_substitution/test_tokens.yml
@@ -0,0 +1,105 @@
+- attrs:
+  - - class
+    - substitution
+  - - text
+    - block
+  block: true
+  children: null
+  content: block
+  hidden: false
+  info: ''
+  level: 0
+  map:
+  - 0
+  - 1
+  markup: '{}'
+  meta: {}
+  nesting: 0
+  tag: div
+  type: substitution_block
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 0
+  map:
+  - 2
+  - 3
+  markup: ''
+  meta: {}
+  nesting: 1
+  tag: p
+  type: paragraph_open
+- attrs: null
+  block: true
+  children:
+  - attrs: null
+    block: false
+    children: null
+    content: 'a '
+    hidden: false
+    info: ''
+    level: 0
+    map: null
+    markup: ''
+    meta: {}
+    nesting: 0
+    tag: ''
+    type: text
+  - attrs:
+    - - class
+      - substitution
+    - - text
+      - inline
+    block: false
+    children: null
+    content: inline
+    hidden: false
+    info: ''
+    level: 0
+    map: null
+    markup: '{}'
+    meta: {}
+    nesting: 0
+    tag: span
+    type: substitution_inline
+  - attrs: null
+    block: false
+    children: null
+    content: ' b'
+    hidden: false
+    info: ''
+    level: 0
+    map: null
+    markup: ''
+    meta: {}
+    nesting: 0
+    tag: ''
+    type: text
+  content: a {{ inline }} b
+  hidden: false
+  info: ''
+  level: 1
+  map:
+  - 2
+  - 3
+  markup: ''
+  meta: {}
+  nesting: 0
+  tag: ''
+  type: inline
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 0
+  map: null
+  markup: ''
+  meta: {}
+  nesting: -1
+  tag: p
+  type: paragraph_close
diff --git a/tests/test_tasklists.py b/tests/test_tasklists.py
new file mode 100644
index 0000000..427c336
--- /dev/null
+++ b/tests/test_tasklists.py
@@ -0,0 +1,34 @@
+from pathlib import Path
+from textwrap import dedent
+
+from markdown_it import MarkdownIt
+from markdown_it.utils import read_fixture_file
+import pytest
+
+from mdit_py_plugins.tasklists import tasklists_plugin
+
+FIXTURE_PATH = Path(__file__).parent.joinpath("fixtures", "tasklists.md")
+
+
+def test_plugin_parse(data_regression):
+    md = MarkdownIt().use(tasklists_plugin)
+    tokens = md.parse(
+        dedent(
+            """\
+    * [ ] Task incomplete
+    * [x] Task complete
+      * [ ] Indented task incomplete
+      * [x] Indented task complete
+    """
+        )
+    )
+    data_regression.check([t.as_dict() for t in tokens])
+
+
+@pytest.mark.parametrize("line,title,input,expected", read_fixture_file(FIXTURE_PATH))
+def test_all(line, title, input, expected):
+    md = MarkdownIt("commonmark").use(tasklists_plugin)
+    md.options["xhtmlOut"] = False
+    text = md.render(input)
+    print(text)
+    assert text.rstrip() == expected.rstrip()
diff --git a/tests/test_tasklists/test_plugin_parse.yml b/tests/test_tasklists/test_plugin_parse.yml
new file mode 100644
index 0000000..bc0d630
--- /dev/null
+++ b/tests/test_tasklists/test_plugin_parse.yml
@@ -0,0 +1,458 @@
+- attrs:
+  - - class
+    - contains-task-list
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 0
+  map:
+  - 0
+  - 4
+  markup: '*'
+  meta: {}
+  nesting: 1
+  tag: ul
+  type: bullet_list_open
+- attrs:
+  - - class
+    - task-list-item
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 1
+  map:
+  - 0
+  - 1
+  markup: '*'
+  meta: {}
+  nesting: 1
+  tag: li
+  type: list_item_open
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: true
+  info: ''
+  level: 2
+  map:
+  - 0
+  - 1
+  markup: ''
+  meta: {}
+  nesting: 1
+  tag: p
+  type: paragraph_open
+- attrs: null
+  block: true
+  children:
+  - attrs: null
+    block: false
+    children: null
+    content: <input class="task-list-item-checkbox" disabled="disabled" type="checkbox">
+    hidden: false
+    info: ''
+    level: 0
+    map: null
+    markup: ''
+    meta: {}
+    nesting: 0
+    tag: ''
+    type: html_inline
+  - attrs: null
+    block: false
+    children: null
+    content: ' Task incomplete'
+    hidden: false
+    info: ''
+    level: 0
+    map: null
+    markup: ''
+    meta: {}
+    nesting: 0
+    tag: ''
+    type: text
+  content: ' Task incomplete'
+  hidden: false
+  info: ''
+  level: 3
+  map:
+  - 0
+  - 1
+  markup: ''
+  meta: {}
+  nesting: 0
+  tag: ''
+  type: inline
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: true
+  info: ''
+  level: 2
+  map: null
+  markup: ''
+  meta: {}
+  nesting: -1
+  tag: p
+  type: paragraph_close
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 1
+  map: null
+  markup: '*'
+  meta: {}
+  nesting: -1
+  tag: li
+  type: list_item_close
+- attrs:
+  - - class
+    - task-list-item
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 1
+  map:
+  - 1
+  - 4
+  markup: '*'
+  meta: {}
+  nesting: 1
+  tag: li
+  type: list_item_open
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: true
+  info: ''
+  level: 2
+  map:
+  - 1
+  - 2
+  markup: ''
+  meta: {}
+  nesting: 1
+  tag: p
+  type: paragraph_open
+- attrs: null
+  block: true
+  children:
+  - attrs: null
+    block: false
+    children: null
+    content: <input class="task-list-item-checkbox" checked="checked" disabled="disabled"
+      type="checkbox">
+    hidden: false
+    info: ''
+    level: 0
+    map: null
+    markup: ''
+    meta: {}
+    nesting: 0
+    tag: ''
+    type: html_inline
+  - attrs: null
+    block: false
+    children: null
+    content: ' Task complete'
+    hidden: false
+    info: ''
+    level: 0
+    map: null
+    markup: ''
+    meta: {}
+    nesting: 0
+    tag: ''
+    type: text
+  content: ' Task complete'
+  hidden: false
+  info: ''
+  level: 3
+  map:
+  - 1
+  - 2
+  markup: ''
+  meta: {}
+  nesting: 0
+  tag: ''
+  type: inline
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: true
+  info: ''
+  level: 2
+  map: null
+  markup: ''
+  meta: {}
+  nesting: -1
+  tag: p
+  type: paragraph_close
+- attrs:
+  - - class
+    - contains-task-list
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 2
+  map:
+  - 2
+  - 4
+  markup: '*'
+  meta: {}
+  nesting: 1
+  tag: ul
+  type: bullet_list_open
+- attrs:
+  - - class
+    - task-list-item
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 3
+  map:
+  - 2
+  - 3
+  markup: '*'
+  meta: {}
+  nesting: 1
+  tag: li
+  type: list_item_open
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: true
+  info: ''
+  level: 4
+  map:
+  - 2
+  - 3
+  markup: ''
+  meta: {}
+  nesting: 1
+  tag: p
+  type: paragraph_open
+- attrs: null
+  block: true
+  children:
+  - attrs: null
+    block: false
+    children: null
+    content: <input class="task-list-item-checkbox" disabled="disabled" type="checkbox">
+    hidden: false
+    info: ''
+    level: 0
+    map: null
+    markup: ''
+    meta: {}
+    nesting: 0
+    tag: ''
+    type: html_inline
+  - attrs: null
+    block: false
+    children: null
+    content: ' Indented task incomplete'
+    hidden: false
+    info: ''
+    level: 0
+    map: null
+    markup: ''
+    meta: {}
+    nesting: 0
+    tag: ''
+    type: text
+  content: ' Indented task incomplete'
+  hidden: false
+  info: ''
+  level: 5
+  map:
+  - 2
+  - 3
+  markup: ''
+  meta: {}
+  nesting: 0
+  tag: ''
+  type: inline
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: true
+  info: ''
+  level: 4
+  map: null
+  markup: ''
+  meta: {}
+  nesting: -1
+  tag: p
+  type: paragraph_close
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 3
+  map: null
+  markup: '*'
+  meta: {}
+  nesting: -1
+  tag: li
+  type: list_item_close
+- attrs:
+  - - class
+    - task-list-item
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 3
+  map:
+  - 3
+  - 4
+  markup: '*'
+  meta: {}
+  nesting: 1
+  tag: li
+  type: list_item_open
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: true
+  info: ''
+  level: 4
+  map:
+  - 3
+  - 4
+  markup: ''
+  meta: {}
+  nesting: 1
+  tag: p
+  type: paragraph_open
+- attrs: null
+  block: true
+  children:
+  - attrs: null
+    block: false
+    children: null
+    content: <input class="task-list-item-checkbox" checked="checked" disabled="disabled"
+      type="checkbox">
+    hidden: false
+    info: ''
+    level: 0
+    map: null
+    markup: ''
+    meta: {}
+    nesting: 0
+    tag: ''
+    type: html_inline
+  - attrs: null
+    block: false
+    children: null
+    content: ' Indented task complete'
+    hidden: false
+    info: ''
+    level: 0
+    map: null
+    markup: ''
+    meta: {}
+    nesting: 0
+    tag: ''
+    type: text
+  content: ' Indented task complete'
+  hidden: false
+  info: ''
+  level: 5
+  map:
+  - 3
+  - 4
+  markup: ''
+  meta: {}
+  nesting: 0
+  tag: ''
+  type: inline
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: true
+  info: ''
+  level: 4
+  map: null
+  markup: ''
+  meta: {}
+  nesting: -1
+  tag: p
+  type: paragraph_close
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 3
+  map: null
+  markup: '*'
+  meta: {}
+  nesting: -1
+  tag: li
+  type: list_item_close
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 2
+  map: null
+  markup: '*'
+  meta: {}
+  nesting: -1
+  tag: ul
+  type: bullet_list_close
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 1
+  map: null
+  markup: '*'
+  meta: {}
+  nesting: -1
+  tag: li
+  type: list_item_close
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 0
+  map: null
+  markup: '*'
+  meta: {}
+  nesting: -1
+  tag: ul
+  type: bullet_list_close
diff --git a/tests/test_texmath.py b/tests/test_texmath.py
new file mode 100644
index 0000000..80bf67b
--- /dev/null
+++ b/tests/test_texmath.py
@@ -0,0 +1,105 @@
+from pathlib import Path
+from textwrap import dedent
+
+from markdown_it import MarkdownIt
+from markdown_it.rules_block import StateBlock
+from markdown_it.rules_inline import StateInline
+from markdown_it.utils import read_fixture_file
+import pytest
+
+from mdit_py_plugins.texmath import index as main
+from mdit_py_plugins.texmath import texmath_plugin
+
+FIXTURE_PATH = Path(__file__).parent.joinpath("fixtures")
+
+
+def test_inline_func():
+
+    inline_func = main.make_inline_func(main.rules["dollars"]["inline"][0])
+
+    md = MarkdownIt()
+    src = r"$a=1$ $b=2$"
+    tokens = []
+    state = StateInline(src, md, {}, tokens)
+    inline_func(state, False)
+    assert tokens[0].as_dict() == {
+        "type": "math_inline",
+        "tag": "math",
+        "nesting": 0,
+        "attrs": None,
+        "map": None,
+        "level": 0,
+        "children": None,
+        "content": "a=1",
+        "markup": "$",
+        "info": "",
+        "meta": {},
+        "block": False,
+        "hidden": False,
+    }
+    assert state.pos == 5
+
+
+def test_block_func():
+    block_func = main.make_block_func(main.rules["dollars"]["block"][0])
+    md = MarkdownIt()
+    src = r"$$\na=1\n\nc\nb=2$$ (abc)"
+    tokens = []
+    state = StateBlock(src, md, {}, tokens)
+    block_func(state, 0, 10, False)
+    assert tokens[0].as_dict() == {
+        "type": "math_block_eqno",
+        "tag": "math",
+        "nesting": 0,
+        "attrs": None,
+        "map": None,
+        "level": 0,
+        "children": None,
+        "content": "\\na=1\\n\\nc\\nb=2",
+        "markup": "$$",
+        "info": "abc",
+        "meta": {},
+        "block": True,
+        "hidden": False,
+    }
+
+
+def test_plugin_parse(data_regression):
+    md = MarkdownIt().use(texmath_plugin)
+    tokens = md.parse(
+        dedent(
+            """\
+    $$
+    a=1
+    b=2
+    $$ (abc)
+
+    - ab $c=1$ d
+    """
+        )
+    )
+    data_regression.check([t.as_dict() for t in tokens])
+
+
+@pytest.mark.parametrize(
+    "line,title,input,expected",
+    read_fixture_file(FIXTURE_PATH.joinpath("texmath_dollar.md")),
+)
+def test_dollar_fixtures(line, title, input, expected):
+    md = MarkdownIt("commonmark").use(texmath_plugin)
+    md.options["xhtmlOut"] = False
+    text = md.render(input)
+    print(text)
+    assert text.rstrip() == expected.rstrip()
+
+
+@pytest.mark.parametrize(
+    "line,title,input,expected",
+    read_fixture_file(FIXTURE_PATH.joinpath("texmath_bracket.md")),
+)
+def test_bracket_fixtures(line, title, input, expected):
+    md = MarkdownIt("commonmark").use(texmath_plugin, delimiters="brackets")
+    md.options["xhtmlOut"] = False
+    text = md.render(input)
+    print(text)
+    assert text.rstrip() == expected.rstrip()
diff --git a/tests/test_texmath/test_plugin_parse.yml b/tests/test_texmath/test_plugin_parse.yml
new file mode 100644
index 0000000..eac4e09
--- /dev/null
+++ b/tests/test_texmath/test_plugin_parse.yml
@@ -0,0 +1,157 @@
+- attrs: null
+  block: true
+  children: null
+  content: '
+
+    a=1
+
+    b=2
+
+    '
+  hidden: false
+  info: abc
+  level: 0
+  map: null
+  markup: $$
+  meta: {}
+  nesting: 0
+  tag: math
+  type: math_block_eqno
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 0
+  map:
+  - 5
+  - 6
+  markup: '-'
+  meta: {}
+  nesting: 1
+  tag: ul
+  type: bullet_list_open
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 1
+  map:
+  - 5
+  - 6
+  markup: '-'
+  meta: {}
+  nesting: 1
+  tag: li
+  type: list_item_open
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: true
+  info: ''
+  level: 2
+  map:
+  - 5
+  - 6
+  markup: ''
+  meta: {}
+  nesting: 1
+  tag: p
+  type: paragraph_open
+- attrs: null
+  block: true
+  children:
+  - attrs: null
+    block: false
+    children: null
+    content: 'ab '
+    hidden: false
+    info: ''
+    level: 0
+    map: null
+    markup: ''
+    meta: {}
+    nesting: 0
+    tag: ''
+    type: text
+  - attrs: null
+    block: false
+    children: null
+    content: c=1
+    hidden: false
+    info: ''
+    level: 0
+    map: null
+    markup: $
+    meta: {}
+    nesting: 0
+    tag: math
+    type: math_inline
+  - attrs: null
+    block: false
+    children: null
+    content: ' d'
+    hidden: false
+    info: ''
+    level: 0
+    map: null
+    markup: ''
+    meta: {}
+    nesting: 0
+    tag: ''
+    type: text
+  content: ab $c=1$ d
+  hidden: false
+  info: ''
+  level: 3
+  map:
+  - 5
+  - 6
+  markup: ''
+  meta: {}
+  nesting: 0
+  tag: ''
+  type: inline
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: true
+  info: ''
+  level: 2
+  map: null
+  markup: ''
+  meta: {}
+  nesting: -1
+  tag: p
+  type: paragraph_close
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 1
+  map: null
+  markup: '-'
+  meta: {}
+  nesting: -1
+  tag: li
+  type: list_item_close
+- attrs: null
+  block: true
+  children: null
+  content: ''
+  hidden: false
+  info: ''
+  level: 0
+  map: null
+  markup: '-'
+  meta: {}
+  nesting: -1
+  tag: ul
+  type: bullet_list_close
diff --git a/tests/test_wordcount.py b/tests/test_wordcount.py
new file mode 100644
index 0000000..d7629d9
--- /dev/null
+++ b/tests/test_wordcount.py
@@ -0,0 +1,23 @@
+import json
+from pathlib import Path
+
+from markdown_it import MarkdownIt
+from markdown_it.utils import read_fixture_file
+import pytest
+
+from mdit_py_plugins.wordcount import wordcount_plugin
+
+FIXTURE_PATH = Path(__file__).parent.joinpath("fixtures", "wordcount.md")
+
+
+@pytest.mark.parametrize("line,title,input,expected", read_fixture_file(FIXTURE_PATH))
+def test_all(line, title, input, expected):
+    md = MarkdownIt("commonmark").use(wordcount_plugin, store_text="(text)" in title)
+    env = {}
+    md.render(input, env)
+    data = json.dumps(env["wordcount"], indent=2, sort_keys=True)
+    try:
+        assert data.strip() == expected.strip()
+    except AssertionError:
+        print(data)
+        raise
diff --git a/tox.ini b/tox.ini
new file mode 100644
index 0000000..163d38b
--- /dev/null
+++ b/tox.ini
@@ -0,0 +1,25 @@
+# To use tox, see https://tox.readthedocs.io
+# Simply pip or conda install tox
+# If you use conda, you may also want to install tox-conda
+# then run `tox` or `tox -- {pytest args}`
+# run in parallel using `tox -p`
+[tox]
+envlist = py37
+
+[testenv]
+usedevelop = true
+
+[testenv:py{37,38,39,310}]
+extras = testing
+commands = pytest {posargs}
+
+[testenv:docs-{update,clean}]
+extras = rtd
+whitelist_externals = rm
+commands =
+    clean: rm -rf docs/_build
+    sphinx-build -nW --keep-going -b {posargs:html} docs/ docs/_build/{posargs:html}
+
+[flake8]
+max-line-length = 100
+extend-ignore = E203,E731