public void MotorController_SetForward_CallsMotorActorSetSpeedOnceOnEachSide(MotorSpeed motorSpeed)
        {
            // Arrange
            var motorActors     = new Mock <IDirectional <IMotorActor> >();
            var motorActorLeft  = new Mock <IMotorActor>();
            var motorActorRight = new Mock <IMotorActor>();

            motorActors.SetupGet(_ => _.Right).Returns(motorActorRight.Object);
            motorActors.SetupGet(_ => _.Left).Returns(motorActorLeft.Object);

            var motorSpeedConverter = new MotorSpeedConverter();
            var testee = new MotorController(motorActors.Object, motorSpeedConverter);

            // Act
            testee.SetForward(motorSpeed);

            // Assert
            motorActors.Verify(p => p.Right.SetSpeed(It.IsAny <double>()), Times.Once());
            motorActors.Verify(p => p.Left.SetSpeed(It.IsAny <double>()), Times.Once());
        }