def coerce(cls, string):
        """Create a :class:`Requirement` object from a given package spec."""
        match = re.match(cls.spec_regex, string)
        if not match:
            raise InvalidRequirementSpecError("could not parse requirement")
        package = match.group(1)
        if all(match.group(2, 3)):
            version = "".join(match.group(2, 3))
        else:
            version = None
        return cls(package, version)
def test_convert_html_in_suggestion_change(self):
        html_content = (
            '<p>Value</p><oppia-noninteractive-math raw_latex-with-value="&a'
            'mp;quot;+,-,-,+&amp;quot;"></oppia-noninteractive-math>')
        expected_html_content = (
            '<p>Value</p><oppia-noninteractive-math math_content-with-value='
            '"{&amp;quot;raw_latex&amp;quot;: &amp;quot;+,-,-,+&amp;quot;, &'
            'amp;quot;svg_filename&amp;quot;: &amp;quot;&amp;quot;}"></oppia'
            '-noninteractive-math>')
        change_dict = {
            'cmd': exp_domain.CMD_ADD_WRITTEN_TRANSLATION,
            'state_name': 'Introduction',
            'content_id': 'content',
            'language_code': 'hi',
            'content_html': html_content,
            'translation_html': '<p>This is translated html.</p>',
            'data_format': 'html'
        }
        suggestion = suggestion_registry.SuggestionTranslateContent(
            self.suggestion_dict['suggestion_id'],
            self.suggestion_dict['target_id'],
            self.suggestion_dict['target_version_at_submission'],
            self.suggestion_dict['status'], self.author_id,
            self.reviewer_id, change_dict,
            self.suggestion_dict['score_category'],
            self.suggestion_dict['language_code'], False, self.fake_date)
        suggestion.convert_html_in_suggestion_change(
            html_validation_service.add_math_content_to_math_rte_components)
        self.assertEqual(
            suggestion.change.content_html, expected_html_content)