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"""Test the Pygments highlighting bridge."""
from __future__ import annotations
from typing import TYPE_CHECKING
from unittest import mock
import pygments
import pytest
from pygments.formatters.html import HtmlFormatter
from pygments.lexer import RegexLexer
from pygments.token import Name, Text
from sphinx.highlighting import PygmentsBridge
if TYPE_CHECKING:
from sphinx.testing.util import SphinxTestApp
if tuple(map(int, pygments.__version__.split('.')[:2])) < (2, 18):
from pygments.formatter import Formatter
Formatter.__class_getitem__ = classmethod(lambda cls, name: cls) # type: ignore[attr-defined]
class MyLexer(RegexLexer):
name = 'testlexer'
tokens = {
'root': [
('a', Name),
('b', Text),
],
}
class MyFormatter(HtmlFormatter[str]):
def format(self, tokensource, outfile):
for tok in tokensource:
outfile.write(tok[1])
class ComplainOnUnhighlighted(PygmentsBridge):
def unhighlighted(self, source):
raise AssertionError('should highlight %r' % source)
@pytest.mark.sphinx('html', testroot='root')
def test_add_lexer(app: SphinxTestApp) -> None:
app.add_lexer('test', MyLexer)
bridge = PygmentsBridge('html')
ret = bridge.highlight_block('ab', 'test')
assert '<span class="n">a</span>b' in ret
def test_detect_interactive() -> None:
bridge = ComplainOnUnhighlighted('html')
blocks = [
"""
>>> testing()
True
""",
]
for block in blocks:
ret = bridge.highlight_block(block.lstrip(), 'python')
assert ret.startswith('<div class="highlight">')
def test_lexer_options() -> None:
bridge = PygmentsBridge('html')
ret = bridge.highlight_block('//comment', 'php', opts={'startinline': True})
assert '<span class="c1">//comment</span>' in ret
def test_set_formatter() -> None:
PygmentsBridge.html_formatter = MyFormatter
try:
bridge = PygmentsBridge('html')
ret = bridge.highlight_block('foo\n', 'python')
assert ret == 'foo\n'
finally:
PygmentsBridge.html_formatter = HtmlFormatter
@mock.patch('sphinx.highlighting.logger')
def test_default_highlight(logger):
bridge = PygmentsBridge('html')
# default: highlights as python3
ret = bridge.highlight_block('print "Hello sphinx world"', 'default')
assert ret == (
'<div class="highlight"><pre><span></span><span class="nb">print</span> '
'<span class="s2">"Hello sphinx world"</span>\n</pre></div>\n'
)
# default: fallbacks to none if highlighting failed
ret = bridge.highlight_block('reST ``like`` text', 'default')
assert ret == (
'<div class="highlight"><pre><span></span>reST ``like`` text\n</pre></div>\n'
)
# python: highlights as python3
ret = bridge.highlight_block('print("Hello sphinx world")', 'python')
assert ret == (
'<div class="highlight"><pre><span></span><span class="nb">print</span>'
'<span class="p">(</span>'
'<span class="s2">"Hello sphinx world"</span>'
'<span class="p">)</span>\n</pre></div>\n'
)
# python3: highlights as python3
ret = bridge.highlight_block('print("Hello sphinx world")', 'python3')
assert ret == (
'<div class="highlight"><pre><span></span><span class="nb">print</span>'
'<span class="p">(</span>'
'<span class="s2">"Hello sphinx world"</span>'
'<span class="p">)</span>\n</pre></div>\n'
)
# python: raises error if highlighting failed
ret = bridge.highlight_block('reST ``like`` text', 'python')
logger.warning.assert_called_with(
'Lexing literal_block %r as "%s" resulted in an error at token: %r. '
'Retrying in relaxed mode.',
'reST ``like`` text',
'python',
'`',
type='misc',
subtype='highlighting_failure',
location=None,
)
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