def test_vec2d_subtract():
node_a = (1, 2)
node_b = (2, 4)
res_1 = Vec2d.subtract(node_a, node_b)
res_2 = Vec2d.subtract(node_b, node_a)
assert res_1 != res_2
assert res_1 == (-1, -2)
assert res_2 == (1, 2)
def test_vec2d_rotate():
node_a = (-1.95, -2.2)
res_1 = Vec2d.rotate(node_a, -90.0)
res_2 = Vec2d.rotate(node_a, 0.0)
res_3 = Vec2d.rotate(node_a, 90.0)
res_4 = Vec2d.rotate(node_a, 180.0)
res_5 = Vec2d.rotate(node_a, 270.0)
res_6 = Vec2d.rotate(node_a, 30.0)
res_1 = (Vec2d.get_norm(Vec2d.subtract(res_1, (-2.2, 1.95))))
res_2 = (Vec2d.get_norm(Vec2d.subtract(res_2, (-1.95, -2.2))))
res_3 = (Vec2d.get_norm(Vec2d.subtract(res_3, (2.2, -1.95))))
res_4 = (Vec2d.get_norm(Vec2d.subtract(res_4, (1.95, 2.2))))
res_5 = (Vec2d.get_norm(Vec2d.subtract(res_5, (-2.2, 1.95))))
res_6 = (Vec2d.get_norm(
Vec2d.subtract(res_6, (-0.5887495373796556, -2.880255888325765))))
assert np.isclose(0, res_1)
assert np.isclose(0, res_2)
assert np.isclose(0, res_3)
assert np.isclose(0, res_4)
assert np.isclose(0, res_5)
assert np.isclose(0, res_6)
