def test_get_signature():
# noinspection PyUnusedLocal
def f(a, b):
assert False # pragma: no cover
# noinspection PyUnusedLocal
def f2(b, a):
assert False # pragma: no cover
assert get_signature(lambda a, b: None) == get_signature(
f2) == get_signature(f) == 'a,b||'
# noinspection PyUnresolvedReferences
assert f.__tri_declarative_signature == 'a,b||'
def test_early_return_from_get_signature():
# noinspection PyUnusedLocal
def foo(a, b, c):
assert False # pragma: no cover
object.__setattr__(foo, '__tri_declarative_signature', 'foobar')
assert get_signature(foo) == 'foobar'
def test_get_signature_on_class():
class Foo:
# noinspection PyUnusedLocal
def __init__(self, a, b):
assert False # pragma: no cover
assert 'a,b,self||' == get_signature(Foo)
# noinspection PyUnresolvedReferences
assert 'a,b,self||' == Foo.__tri_declarative_signature
def test_get_signature_description():
assert get_signature(lambda a, b: None) == 'a,b||'
assert get_signature(lambda a, b, c, d=None, e=None: None) == 'a,b,c|d,e|'
assert get_signature(lambda d, c, b=None, a=None: None) == 'c,d|a,b|'
assert get_signature(lambda a, b, c=None, d=None, **_: None) == 'a,b|c,d|*'
assert get_signature(lambda d, c, b=None, a=None, **_: None) == 'c,d|a,b|*'
assert get_signature(lambda **_: None) == '||*'
def test_get_signature_varargs():
assert get_signature(lambda a, b, **c: None) == "a,b||*"
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 get_signature(f) is None
def test_get_signature_on_namespace_does_not_modify_its_contents():
foo = Namespace()
get_signature(foo)
assert str(foo) == 'Namespace()'
