public void Construction_DecelAxisCompMultiplierLessThanZero_ThrowsException(float decelAxisCompMultiplier)
{
IInertialScrollProcessConstArg arg = CreateMockConstArg();
arg.decelerationAxisComponentMultiplier.Returns(decelAxisCompMultiplier);
Assert.Throws(
Is.TypeOf(typeof(System.InvalidOperationException)).And.Message.EqualTo("deceleration axis component multiplier must not be less than zero"),
() => {
new TestInertialScrollProcess(arg);
}
);
}
public void Construction_DecelerationNotGreaterThanZero_ThrowsException(float deceleration)
{
IInertialScrollProcessConstArg arg = CreateMockConstArg();
arg.deceleration.Returns(deceleration);
Assert.Throws(
Is.TypeOf(typeof(System.InvalidOperationException)).And.Message.EqualTo("deceleration must be greater than zero"),
() => {
new TestInertialScrollProcess(arg);
}
);
}
public IInertialScrollProcessConstArg CreateMockConstArg()
{
IInertialScrollProcessConstArg arg = Substitute.For <IInertialScrollProcessConstArg>();
arg.processManager.Returns(Substitute.For <IProcessManager>());
arg.scroller.Returns(Substitute.For <IScroller>());
arg.scrollerElement.Returns(Substitute.For <IUIElement>());
arg.dimension.Returns(0);
arg.initialVelocity.Returns(0f);
arg.deceleration.Returns(.1f);
arg.decelerationAxisComponentMultiplier.Returns(.5f);
return(arg);
}
public InertialScrollProcess(
IInertialScrollProcessConstArg arg
) : base(
arg
)
{
thisInitialVelocity = arg.initialVelocity;
thisPrevVelocity = thisInitialVelocity;
thisPrevLocalPosOnAxis = thisScrollerElement.GetLocalPosition()[thisDimension];
thisDeceleration = MakeSureDecelerationIsGreaterThanZero(arg.deceleration) * MakeSureDecelAxisCompMultiplierIsNotLessThanZero(arg.decelerationAxisComponentMultiplier);
if (thisDeceleration == 0f || thisInitialVelocity == 0f)
{
thisExpireTime = 0f;
}
else
{
thisExpireTime = Mathf.Abs(thisInitialVelocity / thisDeceleration);
}
thisScroller.UpdateVelocity(thisInitialVelocity, thisDimension);
}
public TestInertialScrollProcess(IInertialScrollProcessConstArg arg) : base(arg)
{
}
