def test_csum():
x = np.array([1, 2, 3], dtype=np.double)
s = csum(x)
assert_almost_equal(s, 6.)
def test_csum():
x = np.array([1, 2, 3], dtype=np.double)
s = csum(x)
assert_almost_equal(s, 6.)
def test_csum():
x = np.array([1, 2, 3], dtype=np.double)
s = csum(x)
assert_allclose(s, 6.)
