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- from __future__ import unicode_literals
- from prompt_toolkit.completion import CompleteEvent, Completer, Completion
- from prompt_toolkit.contrib.regular_languages import compile
- from prompt_toolkit.contrib.regular_languages.compiler import Match, Variables
- from prompt_toolkit.contrib.regular_languages.completion import \
- GrammarCompleter
- from prompt_toolkit.document import Document
- def test_simple_match():
- g = compile('hello|world')
- m = g.match('hello')
- assert isinstance(m, Match)
- m = g.match('world')
- assert isinstance(m, Match)
- m = g.match('somethingelse')
- assert m is None
- def test_variable_varname():
- """
- Test `Variable` with varname.
- """
- g = compile('((?P<varname>hello|world)|test)')
- m = g.match('hello')
- variables = m.variables()
- assert isinstance(variables, Variables)
- assert variables.get('varname') == 'hello'
- assert variables['varname'] == 'hello'
- m = g.match('world')
- variables = m.variables()
- assert isinstance(variables, Variables)
- assert variables.get('varname') == 'world'
- assert variables['varname'] == 'world'
- m = g.match('test')
- variables = m.variables()
- assert isinstance(variables, Variables)
- assert variables.get('varname') is None
- assert variables['varname'] is None
- def test_prefix():
- """
- Test `match_prefix`.
- """
- g = compile(r'(hello\ world|something\ else)')
- m = g.match_prefix('hello world')
- assert isinstance(m, Match)
- m = g.match_prefix('he')
- assert isinstance(m, Match)
- m = g.match_prefix('')
- assert isinstance(m, Match)
- m = g.match_prefix('som')
- assert isinstance(m, Match)
- m = g.match_prefix('hello wor')
- assert isinstance(m, Match)
- m = g.match_prefix('no-match')
- assert m.trailing_input().start == 0
- assert m.trailing_input().stop == len('no-match')
- m = g.match_prefix('hellotest')
- assert m.trailing_input().start == len('hello')
- assert m.trailing_input().stop == len('hellotest')
- def test_completer():
- class completer1(Completer):
- def get_completions(self, document, complete_event):
- yield Completion(
- 'before-%s-after' % document.text, -len(document.text))
- yield Completion(
- 'before-%s-after-B' % document.text, -len(document.text))
- class completer2(Completer):
- def get_completions(self, document, complete_event):
- yield Completion(
- 'before2-%s-after2' % document.text, -len(document.text))
- yield Completion(
- 'before2-%s-after2-B' % document.text, -len(document.text))
- # Create grammar. "var1" + "whitespace" + "var2"
- g = compile(r'(?P<var1>[a-z]*) \s+ (?P<var2>[a-z]*)')
- # Test 'get_completions()'
- completer = GrammarCompleter(
- g, {'var1': completer1(), 'var2': completer2()})
- completions = list(completer.get_completions(
- Document('abc def', len('abc def')),
- CompleteEvent()))
- assert len(completions) == 2
- assert completions[0].text == 'before2-def-after2'
- assert completions[0].start_position == -3
- assert completions[1].text == 'before2-def-after2-B'
- assert completions[1].start_position == -3
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