path: root/tests/test_html_formatter.py

"""
    Pygments HTML formatter tests
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

    :copyright: Copyright 2006-2022 by the Pygments team, see AUTHORS.
    :license: BSD, see LICENSE for details.
"""

import os
import re
import tempfile
from io import StringIO
from os import path

import pytest

from pygments.formatters import HtmlFormatter, NullFormatter
from pygments.formatters.html import escape_html
from pygments.lexers import PythonLexer
from pygments.style import Style

TESTDIR = path.dirname(path.abspath(__file__))
TESTFILE = path.join(TESTDIR, 'test_html_formatter.py')

with open(TESTFILE, encoding='utf-8') as fp:
    tokensource = list(PythonLexer().get_tokens(fp.read()))


def test_correct_output():
    hfmt = HtmlFormatter(nowrap=True)
    houtfile = StringIO()
    hfmt.format(tokensource, houtfile)

    nfmt = NullFormatter()
    noutfile = StringIO()
    nfmt.format(tokensource, noutfile)

    stripped_html = re.sub('<.*?>', '', houtfile.getvalue())
    escaped_text = escape_html(noutfile.getvalue())
    assert stripped_html == escaped_text


def test_external_css():
    # test correct behavior
    # CSS should be in /tmp directory
    fmt1 = HtmlFormatter(full=True, cssfile='fmt1.css', outencoding='utf-8')
    # CSS should be in TESTDIR (TESTDIR is absolute)
    fmt2 = HtmlFormatter(full=True, cssfile=path.join(TESTDIR, 'fmt2.css'),
                         outencoding='utf-8')
    tfile = tempfile.NamedTemporaryFile(suffix='.html')
    fmt1.format(tokensource, tfile)
    try:
        fmt2.format(tokensource, tfile)
        assert path.isfile(path.join(TESTDIR, 'fmt2.css'))
    except OSError:
        # test directory not writable
        pass
    tfile.close()

    assert path.isfile(path.join(path.dirname(tfile.name), 'fmt1.css'))
    os.unlink(path.join(path.dirname(tfile.name), 'fmt1.css'))
    try:
        os.unlink(path.join(TESTDIR, 'fmt2.css'))
    except OSError:
        pass


def test_all_options():
    def check(optdict):
        outfile = StringIO()
        fmt = HtmlFormatter(**optdict)
        fmt.format(tokensource, outfile)

    for optdict in [
        dict(nowrap=True),
        dict(linenos=True, full=True),
        dict(linenos=True, linespans='L'),
        dict(hl_lines=[1, 5, 10, 'xxx']),
        dict(hl_lines=[1, 5, 10], noclasses=True),
    ]:
        check(optdict)

    for linenos in [False, 'table', 'inline']:
        for noclasses in [False, True]:
            for linenospecial in [0, 5]:
                for anchorlinenos in [False, True]:
                    optdict = dict(
                        linenos=linenos,
                        noclasses=noclasses,
                        linenospecial=linenospecial,
                        anchorlinenos=anchorlinenos,
                    )
                    check(optdict)


def test_linespans():
    outfile = StringIO()
    fmt = HtmlFormatter(linespans='L', anchorlinenos=True, linenos="inline")
    fmt.format(tokensource, outfile)
    html = outfile.getvalue()
    assert re.search(r"""<span id="L-1">\s*<a href="#L-1"><span\s*class="linenos">\s*1</span></a>""", html)


def test_lineanchors():
    optdict = dict(lineanchors="foo")
    outfile = StringIO()
    fmt = HtmlFormatter(**optdict)
    fmt.format(tokensource, outfile)
    html = outfile.getvalue()
    assert re.search("<pre>\\s*<span>\\s*</span>\\s*<a id=\"foo-1\" name=\"foo-1\" href=\"#foo-1\">", html)


def test_lineanchors_with_startnum():
    optdict = dict(lineanchors="foo", linenostart=5)
    outfile = StringIO()
    fmt = HtmlFormatter(**optdict)
    fmt.format(tokensource, outfile)
    html = outfile.getvalue()
    assert re.search("<pre>\\s*<span>\\s*</span>\\s*<a id=\"foo-5\" name=\"foo-5\" href=\"#foo-5\">", html)


def test_valid_output():
    # test all available wrappers
    fmt = HtmlFormatter(full=True, linenos=True, noclasses=True,
                        outencoding='utf-8')

    handle, pathname = tempfile.mkstemp('.html')
    with os.fdopen(handle, 'w+b') as tfile:
        fmt.format(tokensource, tfile)
    catname = os.path.join(TESTDIR, 'dtds', 'HTML4.soc')
    try:
        import subprocess
        po = subprocess.Popen(['nsgmls', '-s', '-c', catname, pathname],
                              stdout=subprocess.PIPE)
        ret = po.wait()
        output = po.stdout.read()
        po.stdout.close()
    except OSError:
        # nsgmls not available
        pass
    else:
        if ret:
            print(output)
        assert not ret, 'nsgmls run reported errors'

    os.unlink(pathname)


def test_get_style_defs_contains_pre_style():
    style_defs = HtmlFormatter().get_style_defs().splitlines()
    assert style_defs[0] == 'pre { line-height: 125%; }'


def test_get_style_defs_contains_default_line_numbers_styles():
    style_defs = HtmlFormatter().get_style_defs().splitlines()

    assert style_defs[1] == (
        'td.linenos .normal '
        '{ color: inherit; background-color: transparent; padding-left: 5px; padding-right: 5px; }'
    )
    assert style_defs[2] == (
        'span.linenos '
        '{ color: inherit; background-color: transparent; padding-left: 5px; padding-right: 5px; }'
    )


def test_get_style_defs_contains_style_specific_line_numbers_styles():
    class TestStyle(Style):
        line_number_color = '#ff0000'
        line_number_background_color = '#0000ff'
        line_number_special_color = '#00ff00'
        line_number_special_background_color = '#ffffff'

    style_defs = HtmlFormatter(style=TestStyle).get_style_defs().splitlines()

    assert style_defs[1] == (
        'td.linenos .normal '
        '{ color: #ff0000; background-color: #0000ff; padding-left: 5px; padding-right: 5px; }'
    )
    assert style_defs[2] == (
        'span.linenos '
        '{ color: #ff0000; background-color: #0000ff; padding-left: 5px; padding-right: 5px; }'
    )
    assert style_defs[3] == (
        'td.linenos .special '
        '{ color: #00ff00; background-color: #ffffff; padding-left: 5px; padding-right: 5px; }'
    )
    assert style_defs[4] == (
        'span.linenos.special '
        '{ color: #00ff00; background-color: #ffffff; padding-left: 5px; padding-right: 5px; }'
    )


@pytest.mark.parametrize(
    "formatter_kwargs, style_defs_args, assert_starts_with, assert_contains",
    [
        [{}, [], ".", []],
        [{"cssclass": "foo"}, [], ".foo .", []],
        [{"cssclass": "foo"}, [".bar"], ".bar .", []],
        [{"cssclass": "foo"}, [[".bar", ".baz"]], ".ba", [".bar .", ".baz ."]],
    ]
)
def test_get_token_style_defs_uses_css_prefix(
    formatter_kwargs, style_defs_args, assert_starts_with, assert_contains
):
    formatter = HtmlFormatter(**formatter_kwargs)

    for line in formatter.get_token_style_defs(*style_defs_args):
        assert line.startswith(assert_starts_with)
        for s in assert_contains:
            assert s in line


def test_get_background_style_defs_uses_multiple_css_prefixes():
    formatter = HtmlFormatter()

    lines = formatter.get_background_style_defs([".foo", ".bar"])
    assert lines[0].startswith(".foo .hll, .bar .hll {")
    assert lines[1].startswith(".foo , .bar {")


def test_unicode_options():
    fmt = HtmlFormatter(title='Föö',
                        cssclass='bär',
                        cssstyles='div:before { content: \'bäz\' }',
                        encoding='utf-8')
    handle, pathname = tempfile.mkstemp('.html')
    with os.fdopen(handle, 'w+b') as tfile:
        fmt.format(tokensource, tfile)


def test_ctags():
    try:
        import ctags
    except ImportError:
        # we can't check without the ctags module, but at least check the exception
        assert pytest.raises(
            RuntimeError, HtmlFormatter, tagsfile='support/tags'
        )
    else:
        # this tagfile says that test_ctags() is on line 165, even if it isn't
        # anymore in the actual source
        fmt = HtmlFormatter(tagsfile='support/tags', lineanchors='L',
                            tagurlformat='%(fname)s%(fext)s')
        outfile = StringIO()
        fmt.format(tokensource, outfile)
        assert '<a href="test_html_formatter.py#L-165">test_ctags</a>' \
            in outfile.getvalue()


def test_filename():
    optdict = dict(filename="test.py")
    outfile = StringIO()
    fmt = HtmlFormatter(**optdict)
    fmt.format(tokensource, outfile)
    html = outfile.getvalue()
    assert re.search("<span class=\"filename\">test.py</span><pre>", html)


def test_debug_token_types():
    fmt_nod_token_types = HtmlFormatter(debug_token_types=False)
    outfile_nod_token_types = StringIO()
    fmt_nod_token_types.format(tokensource, outfile_nod_token_types)
    html_nod_token_types = outfile_nod_token_types.getvalue()
    assert '<span class="n" title="Name">TESTDIR</span>' not in html_nod_token_types

    fmt_debug_token_types = HtmlFormatter(debug_token_types=True)
    outfile_debug_token_types = StringIO()
    fmt_debug_token_types.format(tokensource, outfile_debug_token_types)
    html_debug_token_types = outfile_debug_token_types.getvalue()
    assert '<span class="n" title="Name">TESTDIR</span>' in html_debug_token_types