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#! /usr/bin/env python3

# $Id$
# Author: David Goodger <goodger@python.org>
# Copyright: This module has been placed in the public domain.

"""
Tests for docutils.transforms.universal.Messages.
"""

from pathlib import Path
import sys
import unittest

if __name__ == '__main__':
    # prepend the "docutils root" to the Python library path
    # so we import the local `docutils` package.
    sys.path.insert(0, str(Path(__file__).resolve().parents[2]))

from docutils.frontend import get_default_settings
from docutils.parsers.rst import Parser
from docutils.transforms.references import Substitutions
from docutils.transforms.universal import Messages, TestMessages
from docutils.utils import new_document


class TransformTestCase(unittest.TestCase):
    def test_transforms(self):
        parser = Parser()
        settings = get_default_settings(Parser)
        settings.warning_stream = ''
        for name, (transforms, cases) in totest.items():
            for casenum, (case_input, case_expected) in enumerate(cases):
                with self.subTest(id=f'totest[{name!r}][{casenum}]'):
                    document = new_document('test data', settings.copy())
                    parser.parse(case_input, document)
                    # Don't do a ``populate_from_components()`` because that
                    # would enable the Transformer's default transforms.
                    document.transformer.add_transforms(transforms)
                    document.transformer.add_transform(TestMessages)
                    document.transformer.apply_transforms()
                    output = document.pformat()
                    self.assertEqual(output, case_expected)


totest = {}

totest['system_message_sections'] = ((Substitutions, Messages), [
["""\
This |unknown substitution| will generate a system message, thanks to
the ``Substitutions`` transform. The ``Messages`` transform will
generate a "System Messages" section.

(A second copy of the system message is tacked on to the end of the
document by the test framework.)
""",
"""\
<document source="test data">
    <paragraph>
        This \n\
        <problematic ids="problematic-1" refid="system-message-1">
            |unknown substitution|
         will generate a system message, thanks to
        the \n\
        <literal>
            Substitutions
         transform. The \n\
        <literal>
            Messages
         transform will
        generate a "System Messages" section.
    <paragraph>
        (A second copy of the system message is tacked on to the end of the
        document by the test framework.)
    <section classes="system-messages">
        <title>
            Docutils System Messages
        <system_message backrefs="problematic-1" ids="system-message-1" level="3" line="1" source="test data" type="ERROR">
            <paragraph>
                Undefined substitution referenced: "unknown substitution".
"""],
])


if __name__ == '__main__':
    unittest.main()