Add test for identity mul and associativity mul

tests/test_operators.py

@@ -143,12 +143,17 @@ def test_distribute(x: float, y: float, z: float) -> None:
 
 
 @pytest.mark.task0_2
-def test_other() -> None:
+@given(small_floats, small_floats, small_floats)
+def test_other(a: float, b: float, c: float) -> None:
     """
     Write a test that ensures some other property holds for your functions.
     """
-    # TODO: Implement for Task 0.2.
-    raise NotImplementedError("Need to implement for Task 0.2")
+    # Identity property multiplication
+    assert mul(1, a) == a
+    assert mul(a, 1) == a
+
+    # Associative property multiplication
+    assert_close(mul(a, mul(b, c)), mul(mul(a, b), c))
 
 
 # ## Task 0.3  - Higher-order functions