def check_if_giving_no_args_to_func_raises_type_error(self):
"""
Checks if giving no arguments to func raises TypeError
"""
self.assertRaises(TypeError, add_expressions()())
self.assertRaises(TypeError, add_expressions(1, 2, 3)())
self.assertRaises(TypeError, add_expressions()(1, 2, 3))
def test_if_add_expressions_returns_correct_values(self):
"""
Checks correctness of calculations
The result is in dict type where:
- key is exponent
- value is coefficient
"""
self.assertDictEqual(
add_expressions(1, 2, 8)(2, 4), {
1: 1,
2: 4,
8: 8,
4: 4
})
self.assertDictEqual(
add_expressions(1, 1, 2)(2, 4), {
1: 2,
2: 4,
4: 4
})
self.assertDictEqual(
add_expressions(1, 1, 2)(0, 4), {
1: 2,
2: 2,
0: 0,
4: 4
})
def check_if_giving_not_int_to_func_raises_type_error(self):
"""
Checks if giving wrong type of arguments to func raises TypeError
"""
self.assertRaises(TypeError, add_expressions(1, 2, 'test')(2, 4, 9))
self.assertRaises(TypeError, add_expressions(1, 2)(2, 4, 9, 'test'))
self.assertRaises(TypeError, add_expressions(1, 2)(2, 4, 9, None))
self.assertRaises(TypeError,
add_expressions(1, 2, None)(
2,
4,
9,
))
def test_if_keys_or_values_in_result_dict_are_int(self):
"""
Checks if keys and values from result dict are int type
"""
for key, value in add_expressions(1, 2, 8)(2, 3).items():
self.assertIsInstance(key, int)
self.assertIsInstance(value, int)
def test_if_add_expressions_returns_dict_type(self):
"""
Checks if function returns dict type
"""
self.assertIsInstance(add_expressions(1, 2, 8)(2, 3), dict)