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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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