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Abstract Test or Contract Test with pytest
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import pytest | |
def square(num): | |
return num * num | |
def recursive_map(f, _list): | |
"""Recusive map implementation.""" | |
if not _list: | |
return [] | |
else: | |
head, *tail = _list | |
h = [f(head)] | |
h.extend(recursive_map(f, tail)) | |
return h | |
class MapContract(object): | |
@pytest.fixture | |
def a_map(self): | |
raise NotImplementedError('Not Implemented Yet') | |
def test_can_handle_small_list(self, a_map): | |
assert list(a_map(square, [1,3,4])) == [1, 9, 16] | |
def test_can_handle_large_list(self, a_map): | |
num = 10000 | |
assert len(list(a_map(square, range(num)))) == num | |
class TestSTDLibContract(MapContract): | |
@pytest.fixture | |
def a_map(self): | |
return map | |
class TestRecursiveMap(MapContract): | |
@pytest.fixture | |
def a_map(self): | |
return recursive_map |
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