def test_group(self):
g = VisualRegexGrammar()
self._parseStringTest(
g.item(), '(a)',
Schema.Group(capturing='1', subexp=Schema.LiteralChar(char='a')))
self._parseStringTest(g.item(), '(?i)', Schema.SetFlags(flags='i'))
self._parseStringTest(
g.item(), '(?:a)',
Schema.Group(subexp=Schema.LiteralChar(char='a')))
self._parseStringTest(
g.item(), '(?P<id>a)',
Schema.DefineNamedGroup(subexp=Schema.LiteralChar(char='a'),
name='id'))
self._parseStringTest(g.item(), '(?P=id)',
Schema.MatchNamedGroup(name='id'))
self._parseStringTest(g.item(), '(?#abc)', Schema.Comment(text='abc'))
self._parseStringTest(
g.item(), '(?=a)',
Schema.Lookahead(subexp=Schema.LiteralChar(char='a'),
positive='1'))
self._parseStringTest(
g.item(), '(?!a)',
Schema.Lookahead(subexp=Schema.LiteralChar(char='a')))
self._parseStringTest(
g.item(), '(?<=a)',
Schema.Lookbehind(subexp=Schema.LiteralChar(char='a'),
positive='1'))
self._parseStringTest(
g.item(), '(?<!a)',
Schema.Lookbehind(subexp=Schema.LiteralChar(char='a')))
def comment(self):
return (Literal('(?#') + RegEx('[^)]+').optional() + Literal(')')
).action(lambda input, begin, end, x, bindings: Schema.Comment(
text=(x[1] if x[1] is not None else '')))