1 files changed, 89 insertions, 0 deletions
diff --git a/tests/test_builders/test_build_warnings.py b/tests/test_builders/test_build_warnings.py
new file mode 100644
index 0000000..eeb7e9d
--- /dev/null
+++ b/tests/test_builders/test_build_warnings.py
@@ -0,0 +1,89 @@
+import os
+import re
+import sys
+
+import pytest
+
+from sphinx.util.console import strip_colors
+
+ENV_WARNINGS = """\
+{root}/autodoc_fodder.py:docstring of autodoc_fodder.MarkupError:\\d+: \
+WARNING: Explicit markup ends without a blank line; unexpected unindent.
+{root}/index.rst:\\d+: WARNING: Encoding 'utf-8-sig' used for reading included \
+file '{root}/wrongenc.inc' seems to be wrong, try giving an :encoding: option
+{root}/index.rst:\\d+: WARNING: invalid single index entry ''
+{root}/index.rst:\\d+: WARNING: image file not readable: foo.png
+{root}/index.rst:\\d+: WARNING: download file not readable: {root}/nonexisting.png
+{root}/undecodable.rst:\\d+: WARNING: undecodable source characters, replacing \
+with "\\?": b?'here: >>>(\\\\|/)xbb<<<((\\\\|/)r)?'
+"""
+
+HTML_WARNINGS = ENV_WARNINGS + """\
+{root}/index.rst:\\d+: WARNING: unknown option: '&option'
+{root}/index.rst:\\d+: WARNING: citation not found: missing
+{root}/index.rst:\\d+: WARNING: a suitable image for html builder not found: foo.\\*
+{root}/index.rst:\\d+: WARNING: Lexing literal_block ".*" as "c" resulted in an error at token: ".*". Retrying in relaxed mode.
+"""
+
+LATEX_WARNINGS = ENV_WARNINGS + """\
+{root}/index.rst:\\d+: WARNING: unknown option: '&option'
+{root}/index.rst:\\d+: WARNING: citation not found: missing
+{root}/index.rst:\\d+: WARNING: a suitable image for latex builder not found: foo.\\*
+{root}/index.rst:\\d+: WARNING: Lexing literal_block ".*" as "c" resulted in an error at token: ".*". Retrying in relaxed mode.
+"""
+
+TEXINFO_WARNINGS = ENV_WARNINGS + """\
+{root}/index.rst:\\d+: WARNING: unknown option: '&option'
+{root}/index.rst:\\d+: WARNING: citation not found: missing
+{root}/index.rst:\\d+: WARNING: a suitable image for texinfo builder not found: foo.\\*
+{root}/index.rst:\\d+: WARNING: a suitable image for texinfo builder not found: \
+\\['application/pdf', 'image/svg\\+xml'\\] \\(svgimg.\\*\\)
+"""
+
+
+def _check_warnings(expected_warnings: str, warning: str) -> None:
+    warnings = strip_colors(re.sub(re.escape(os.sep) + '{1,2}', '/', warning))
+    assert re.match(f'{expected_warnings}$', warnings), (
+        "Warnings don't match:\n"
+        + f'--- Expected (regex):\n{expected_warnings}\n'
+        + f'--- Got:\n{warnings}'
+    )
+    sys.modules.pop('autodoc_fodder', None)
+
+
+@pytest.mark.sphinx('html', testroot='warnings', freshenv=True)
+def test_html_warnings(app, warning):
+    app.build(force_all=True)
+    warnings_exp = HTML_WARNINGS.format(root=re.escape(app.srcdir.as_posix()))
+    _check_warnings(warnings_exp, warning.getvalue())
+
+
+@pytest.mark.sphinx('latex', testroot='warnings', freshenv=True)
+def test_latex_warnings(app, warning):
+    app.build(force_all=True)
+    warnings_exp = LATEX_WARNINGS.format(root=re.escape(app.srcdir.as_posix()))
+    _check_warnings(warnings_exp, warning.getvalue())
+
+
+@pytest.mark.sphinx('texinfo', testroot='warnings', freshenv=True)
+def test_texinfo_warnings(app, warning):
+    app.build(force_all=True)
+    warnings_exp = TEXINFO_WARNINGS.format(root=re.escape(app.srcdir.as_posix()))
+    _check_warnings(warnings_exp, warning.getvalue())
+
+
+def test_uncacheable_config_warning(make_app, tmp_path):
+    """Test that an unpickleable config value raises a warning."""
+    tmp_path.joinpath('conf.py').write_text("""\
+my_config = lambda: None
+show_warning_types = True
+def setup(app):
+    app.add_config_value('my_config', None, 'env')
+    """, encoding='utf-8')
+    tmp_path.joinpath('index.rst').write_text('Test\n====\n', encoding='utf-8')
+    app = make_app(srcdir=tmp_path)
+    app.build()
+    assert strip_colors(app.warning.getvalue()).strip() == (
+        "WARNING: cannot cache unpickable configuration value: 'my_config' "
+        "(because it contains a function, class, or module object) [config.cache]"
+    )