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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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