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from sys import version_info
from typing import List, Dict, Union, Optional, Callable, Any, Tuple, Type, Iterable
from unittest import TestCase, skipUnless
import nptyping as nptyping
import numpy
from typish import Literal, instance_of, State, register_get_type
class A: pass
class B(A): pass
class C(B): pass
class D(C): pass
class E(D): pass
class F(E, str): pass
class TestInstanceOf(TestCase):
def test_instance_of(self):
self.assertTrue(instance_of([[[1], [2]]], List[List[List[int]]]))
self.assertTrue(instance_of([[[1], ['2']]], List[List[List[object]]]))
self.assertTrue(instance_of([], List[int]))
self.assertTrue(instance_of({}, Dict[int, int]))
def test_instance_of_multiple(self):
self.assertTrue(instance_of(F(), A))
self.assertTrue(instance_of(F(), str))
self.assertTrue(instance_of(F(), A, str))
self.assertTrue(not instance_of(F(), A, str, int))
def test_instance_of_union(self):
self.assertTrue(instance_of(F(), Union[int, A]))
self.assertTrue(instance_of(F(), Union[A, int]))
self.assertTrue(instance_of(F(), Union[A, str]))
self.assertTrue(instance_of(F(), Optional[str]))
self.assertTrue(instance_of(None, Optional[str]))
self.assertTrue(instance_of(Any, Union[int, Literal[Any]]))
def test_instance_of_callable(self):
def func1(x: int, y: str) -> object:
pass
def func2() -> int:
pass
def func3(x: int):
pass
def func4():
pass
def func5(x):
pass
def func6(l: List[List[List[int]]]):
pass
self.assertTrue(instance_of(func1, Callable[[int, str], object]))
self.assertTrue(instance_of(func1, Callable[[object, str], object]))
self.assertTrue(not instance_of(func1, Callable[[str, str], object]))
self.assertTrue(not instance_of(func1, Callable[[str, str], int]))
self.assertTrue(instance_of(func2, Callable[[], int]))
self.assertTrue(instance_of(func3, Callable[[int], Any]))
self.assertTrue(instance_of(func4, Callable))
self.assertTrue(instance_of(func5, Callable[[Any], Any]))
self.assertTrue(instance_of(func6, Callable[[List[List[List[int]]]], Any]))
def test_lambda_instance_of_callable(self):
self.assertTrue(instance_of(lambda x, y: 42, Callable[[int, str], str]))
self.assertTrue(instance_of(lambda: 42, Callable[[], str]))
def test_instance_of_type(self):
self.assertTrue(instance_of(int, Type))
self.assertTrue(instance_of(int, Type[int]))
self.assertTrue(not instance_of(str, Type[int]))
def test_instance_of_tuple(self):
self.assertTrue(instance_of((1,), Tuple[int]))
self.assertTrue(instance_of((1, 2, 3), Tuple[int, ...]))
def test_instance_of_list_with_union(self):
self.assertTrue(instance_of([1, '2', 3], List[Union[int, str]]))
self.assertTrue(not instance_of([1, '2', 3], List[Union[int, float]]))
def test_instance_of_tuple_with_union(self):
self.assertTrue(instance_of((1, '2', 3), Tuple[Union[int, str], ...]))
self.assertTrue(not instance_of((1, '2', 3), Tuple[Union[int, float], ...]))
def test_instance_of_iterable(self):
self.assertTrue(instance_of([1, 2, 3], Iterable[int]))
self.assertTrue(instance_of((1, 2, 3), Iterable[int]))
def test_instance_of_literal(self):
self.assertTrue(instance_of(42, Literal[42]))
self.assertTrue(instance_of(42, Literal[42], int))
self.assertTrue(not instance_of(43, Literal[42]))
self.assertTrue(not instance_of(42, Literal[42], str))
self.assertTrue(not instance_of(42, Literal))
self.assertTrue(instance_of(Any, Literal[Any]))
self.assertTrue(not instance_of(42, Literal[Any]))
self.assertTrue(not instance_of(42, Literal))
self.assertTrue(instance_of(2, Literal[1, 2]))
def test_instance_of_typing_literal(self):
# This is to mock Python 3.8 Literal.
class LiteralMockMeta(type):
__name__ = 'Literal'
def __instancecheck__(self, instance):
raise Exception('typing.Literal does not allow instance checks.')
class LiteralMock(metaclass=LiteralMockMeta):
__args__ = (42,)
self.assertTrue(instance_of(42, LiteralMock))
def test_instance_of_numpy(self):
self.assertTrue(instance_of(numpy.array([1, 2, 3]), numpy.ndarray))
def test_instance_of_nptyping_ndarray(self):
local_state = State()
register_get_type(numpy.ndarray, nptyping.NDArray.type_of, local_state)
arr = numpy.array([1, 2, 3])
arr_type = nptyping.NDArray[(3,), int]
self.assertTrue(instance_of(arr, arr_type, state=local_state))
self.assertTrue(instance_of([arr], List[arr_type], state=local_state))
self.assertTrue(instance_of([arr], List[nptyping.NDArray], state=local_state))
self.assertTrue(not instance_of([arr], List[nptyping.NDArray[(4,), float]], state=local_state))
@skipUnless(10 * version_info.major + version_info.minor >= 39, 'PEP-585')
def test_instance_of_py39_types(self):
self.assertTrue(instance_of({'42': 42}, Dict[str, int]))
self.assertTrue(not instance_of({'42': 42}, Dict[str, str]))
self.assertTrue(not instance_of({42: 42}, Dict[str, int]))
self.assertTrue(instance_of([1, 2, 3], list[int]))
self.assertTrue(not instance_of([1, 2, 3], list[str]))