def test_scalar_inverse(v: Vector, scalar: float):
"""Test that (λ * v / λ) ≃ v"""
assume(abs(scalar) > 1e-100)
assert v.isclose(scalar * v / scalar)
def test_isclose_negative_tolerances(v: Vector):
with raises(ValueError):
v.isclose(v, abs_tol=-1)
with raises(ValueError):
v.isclose(v, rel_tol=-1)
def test_reflect_involutive(initial: Vector, normal: Vector):
"""Test that reflection is its own inverse
initial.reflect(normal).reflect(normal) ≃ initial
"""
assert initial.isclose(initial.reflect(normal).reflect(normal))
