def test_positions_and_heights(self):
h = np.array((0, 1, 2, 3, 4))
t = UniformLineScan(h, 4)
assert_array_equal(t.heights(), h)
expected_x = np.array((0., 0.8, 1.6, 2.4, 3.2))
np.testing.assert_allclose(t.positions(), expected_x)
x2, h2 = t.positions_and_heights()
np.testing.assert_allclose(x2, expected_x)
assert_array_equal(h2, h)
def test_detrend_same_positions(self):
"""asserts that the detrended topography has the same x
"""
n = 10
dx = 0.5
h = np.random.normal(size=n)
t = UniformLineScan(h, dx * n)
for mode in ["curvature", "slope", "height"]:
detrended = t.detrend(detrend_mode=mode)
np.testing.assert_allclose(detrended.positions(), t.positions())
np.testing.assert_allclose(detrended.positions_and_heights()[0],
t.positions_and_heights()[0])