def test_not_writes_matcher_as_mismatch_description():
mismatch_output = []
not_(equal_to("Blah")).matches("Blah", mismatch_output)
assert_equals(["got value matching: 'Blah'"], mismatch_output)
def test_not_to_str_prefixes_not_to_matcher_description():
assert_equals(str(not_(equal_to("Blah"))), "not 'Blah'")
def test_not_does_not_write_to_mismatch_output_if_it_matches():
mismatch_output = []
assert not_(equal_to(1)).matches("Blah", mismatch_output)
assert not_(equal_to("Blah")).matches(1, mismatch_output)
assert not mismatch_output
def test_not_negates_given_matcher():
assert not not_(equal_to(1)).matches(1, [])
assert not not_(equal_to("Blah")).matches("Blah", [])
assert not_(equal_to(1)).matches("Blah", [])
assert not_(equal_to("Blah")).matches(1, [])
