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from typing import Tuple, Any, Union |
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from unittest import TestCase |
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from typish import ClsDict, EllipsisType, Literal, ClsFunction |
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class TestClsFunction(TestCase): |
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def test_invalid_initialization(self): |
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# Only ClsDict or dict is allowed |
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with self.assertRaises(TypeError): |
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ClsFunction(123) |
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def test_instantiation_with_no_callable(self): |
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with self.assertRaises(TypeError): |
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ClsFunction({ |
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int: lambda: 1, |
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str: lambda: 2, |
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object: 3, # Invalid! |
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}) |
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def test_with_dict(self): |
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function = ClsFunction({ |
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int: lambda x: x * 2, |
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str: lambda x: '{}_'.format(x), |
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}) |
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self.assertEqual(4, function(2)) |
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self.assertEqual('2_', function('2')) |
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def test_with_cls_dict(self): |
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function = ClsFunction(ClsDict({ |
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int: lambda x: x * 2, |
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str: lambda x: '{}_'.format(x), |
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})) |
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self.assertEqual(4, function(2)) |
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self.assertEqual('2_', function('2')) |
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def test_with_iterable_of_tuples(self): |
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body = [ |
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(int, lambda x: x * 2), |
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(str, lambda x: '{}_'.format(x)), |
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] |
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function_tuple = ClsFunction(body) |
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function_set = ClsFunction(set(body)) |
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function_list = ClsFunction(list(body)) |
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self.assertEqual(4, function_tuple(2)) |
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self.assertEqual('2_', function_tuple('2')) |
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self.assertEqual(4, function_set(2)) |
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self.assertEqual('2_', function_set('2')) |
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self.assertEqual(4, function_list(2)) |
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self.assertEqual('2_', function_list('2')) |
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def test_with_callables(self): |
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def f1(x: int): |
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return 1 |
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class C: |
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def m1(self, x: str): |
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return 2 |
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@classmethod |
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def m2(cls, x: float): |
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return 3 |
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@staticmethod |
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def m3(x: list): |
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return 4 |
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def f2(x): # No type hint |
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return 5 |
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function = ClsFunction([f1, C().m1, C.m2, C.m3, f2]) |
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self.assertEqual(1, function(42)) |
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self.assertEqual(2, function('hello')) |
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self.assertEqual(3, function(42.0)) |
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self.assertEqual(4, function([42])) |
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self.assertEqual(5, function({})) |
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def test_with_invalid_callables(self): |
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def f(): |
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... |
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with self.assertRaises(TypeError): |
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ClsFunction([f]) |
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def test_multiple_args(self): |
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function = ClsFunction({ |
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int: lambda x, y: x * y, |
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str: lambda x, y: '{}{}'.format(x, y), |
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}) |
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self.assertEqual(6, function(2, 3)) |
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self.assertEqual('23', function('2', 3)) |
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def test_understands(self): |
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function = ClsFunction({ |
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int: lambda _: ..., |
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str: lambda _: ..., |
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}) |
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self.assertTrue(function.understands(1)) |
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self.assertTrue(function.understands('2')) |
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self.assertTrue(not function.understands(3.0)) |
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def test_call_no_args(self): |
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function = ClsFunction({ |
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int: lambda x: 1, |
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}) |
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112
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with self.assertRaises(TypeError): |
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function() |
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115
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def test_call_invalid_args(self): |
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function = ClsFunction({ |
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int: lambda x: 1, |
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}) |
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120
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with self.assertRaises(TypeError): |
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function(1, 2) # The lambda expects only 1 argument. |
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123
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def test_complex_cls_function(self): |
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# Test if a more complex ClsFunction can be created without problems. |
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_Size = Union[int, Literal[Any]] |
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_Type = Union[type, Literal[Any]] |
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128
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ClsFunction({ |
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_Size: lambda: 1, |
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_Type: lambda: 2, |
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Tuple[_Size, _Type]: lambda: 3, |
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Tuple[_Size, ...]: lambda: 4, |
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Tuple[Tuple[_Size, ...], _Type]: lambda: 5, |
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Tuple[Tuple[_Size, EllipsisType], _Type]: lambda: 6, |
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Tuple[Tuple[Literal[Any], EllipsisType], Literal[Any]]: lambda: 7, |
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}) |
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ramonhagenaars /
typish
