def test_handle_feature_1dim():
"""
1-dimensional arrays are converted to 2-dimensional column vectors.
"""
array = np.array([1, 2])
assert_array_equal(_handle_feature(array), np.array([[1], [2]]))
def test_handle_feature_2dim():
"""
2-dimensional arrays are returned unchanged.
"""
array = np.array([[1, 2], [3, 4]])
assert_array_equal(_handle_feature(array), array)