def test_cosine_similarity_specific_values(self, cosine_similarity):
arr0 = np.array([[0, 0.5, -1., 3, 0]])
arr1 = 2 * arr0
arr2 = -1 * arr0
assert np.isclose(cosine_similarity(arr0, arr1), 1.)
assert np.isclose(cosine_similarity(arr0, arr2), -1.)
def test_cosine_similarity_incompatible_shapes(self, cosine_similarity):
arr0 = np.zeros((100, 45))
arr1 = np.zeros((200, 46))
with pytest.raises(ValueError) as exc:
cosine_similarity(arr0, arr1)
assert str(exc.value) == "Incompatible shapes: 45 vs 46."
def test_cosine_similarity_specific_values_2d(self, cosine_similarity):
arr0 = np.array([
[0, 0.5, -1., 3, 0],
[0, 0.5, -1., 3, 0],
])
arr1 = np.array([[-1], [1]]) * arr0
assert np.allclose(cosine_similarity(arr0, arr1), [-1., 1])
def test_cosine_similarity_comparison_scipy(self, cosine_similarity, vec):
arr0 = vec[:20].reshape(1, -1)
arr1 = vec[20:].reshape(1, -1)
result = cosine_similarity(arr0, arr1)
expected = 1 - cosine(arr0, arr1)
assert np.isclose(result, expected)
def test_cosine_similarity_arity_1(self, cosine_similarity):
arr = np.random.random((50, 10))
result_arity_1 = cosine_similarity(arr)
result_arity_2 = cosine_similarity(arr, arr)
assert np.allclose(result_arity_1, result_arity_2)
def test_cosine_similarity_different_num_samples(self, cosine_similarity):
arr0 = np.random.random((50, 10))
arr1 = np.random.random((40, 10))
result = cosine_similarity(arr0, arr1)
assert result.shape == (50, 40)