'Test that a unit kernel with a single element returns the same array'

@pytest.mark.parametrize((u'convfunc', u'boundary'), BOUNDARIES_AND_CONVOLUTIONS)
def test_unity_1_none(self, boundary, convfunc):

    x = np.array([1.0, 2.0, 3.0], dtype=u'>f8')
    y = np.array([1.0], dtype=u'>f8')
    z = convfunc(x, y, boundary=boundary)
    np.testing.assert_allclose(z, x)
