def test_internal():
exp = (2.0 / np.pi) * (-2.0 / (3.0 * np.pi))
obs = sinc2d(np.pi / 2.0, 3.0 * np.pi / 2.0)
assert obs == exp
def test_edge_y():
exp = (2.0 / np.pi)
obs = sinc2d(np.pi / 2.0, 0.0)
assert obs == exp
def test_corner_xy():
exp = 1.0
obs = sinc2d(0.0, 0.0)
assert obs == exp
def test_edge_x():
exp = (-2.0 / (3.0 * np.pi))
obs = sinc2d(0.0, 3.0 * np.pi / 2.0)
assert obs == exp
