Merge #152

152: tests: Add tests for __rmul__ (scalar and dot products) r=astronouth7303 a=nbraud



Co-authored-by: Nicolas Braud-Santoni <nicolas@braud-santoni.eu>

tests/test_dot.py

@@ -3,7 +3,7 @@
 from hypothesis import assume, given, note
 
 from ppb_vector import Vector
-from utils import angles, floats, isclose, vectors
+from utils import angles, floats, isclose, vector_likes, vectors
 
 
 @given(vector=vectors())
@@ -75,3 +75,9 @@ def test_dot_from_angle(x: Vector, y: Vector):
     note(f"algebraic: {x * y}")
     note(f"geometric: {geometric}")
     assert isclose(x * y, geometric, rel_to=(x, y), rel_exp=2)
+
+
+@given(x=vectors(), y=vectors())
+def test_dot_rmul(x: Vector, y: Vector):
+    for x_like in vector_likes(x):
+        assert x_like * y == x * y

tests/test_scalar_multiplication.py

@@ -45,3 +45,8 @@ def test_scalar_inverse(x: Vector, scalar: float):
     """Test that (λ * x / λ) ≃ x"""
     assume(abs(scalar) > 1e-100)
     assert x.isclose(scalar * x / scalar)
+
+
+@given(x=vectors(), scalar=floats())
+def test_scalar_rmul(x: Vector, scalar: float):
+    assert scalar * x == x.scale_by(scalar)