def test_get_signature():
def f(a, b):
pass
def f2(b, a):
pass
assert 'a,b||' == get_signature(f) == get_signature(f2) == get_signature(
lambda a, b: None)
assert 'a,b||' == f.__tri_declarative_signature
def test_get_signature_description():
assert 'a,b||' == get_signature(lambda a, b: None)
assert 'a,b,c|d,e|' == get_signature(lambda a, b, c, d=None, e=None: None)
assert 'c,d|a,b|' == get_signature(lambda d, c, b=None, a=None: None)
assert 'a,b|c,d|*' == get_signature(lambda a, b, c=None, d=None, **_: None)
assert 'c,d|a,b|*' == get_signature(lambda d, c, b=None, a=None, **_: None)
assert '||*' == get_signature(lambda **_: None)
def test_get_signature_varargs():
assert "a,b||*" == get_signature(lambda a, b, **c: None)
def test_get_signature_fails_on_native():
# isinstance will return False for a native function. A string will also return False.
f = 'this is not a function'
assert None is get_signature(f)
def test_early_return_from_get_signature():
def foo(a, b, c):
pass
object.__setattr__(foo, '__tri_declarative_signature', 'foobar')
assert get_signature(foo) == 'foobar'
def test_get_signature_on_namespace_does_not_modify_its_contents():
foo = Namespace()
get_signature(foo)
assert str(foo) == 'Namespace()'