public void Tick7Left2Right()
{
PlayerPhysics playerPhysics = new PlayerPhysics();
var acceleration = playerPhysics.GetAcceleration();
var resistance = playerPhysics.GetResistance();
double expectedVelocity;
playerPhysics.AccelerateLeft();
playerPhysics.CalculateVelocityThisTick();
expectedVelocity = acceleration - resistance;
playerPhysics.CalculateVelocityThisTick();
expectedVelocity += acceleration - resistance;
playerPhysics.CalculateVelocityThisTick();
expectedVelocity += acceleration - resistance;
playerPhysics.CalculateVelocityThisTick();
expectedVelocity += acceleration - resistance;
playerPhysics.CalculateVelocityThisTick();
expectedVelocity += acceleration - resistance;
playerPhysics.CalculateVelocityThisTick();
expectedVelocity += acceleration - resistance;
playerPhysics.CalculateVelocityThisTick();
expectedVelocity += acceleration - resistance;
playerPhysics.StopAccelerateLeft();
playerPhysics.AccelerateRight();
playerPhysics.CalculateVelocityThisTick();
expectedVelocity += -acceleration - resistance;
playerPhysics.CalculateVelocityThisTick();
expectedVelocity += -acceleration - resistance;
Assert.AreEqual(expectedVelocity, playerPhysics.GetVelocity());
}
public void StopsWhenNoAcceleration()
{
PlayerPhysics playerPhysics = new PlayerPhysics();
playerPhysics.AccelerateLeft();
playerPhysics.CalculateVelocityThisTick();
playerPhysics.CalculateVelocityThisTick();
playerPhysics.StopAccelerateLeft();
playerPhysics.CalculateVelocityThisTick();
playerPhysics.CalculateVelocityThisTick();
playerPhysics.CalculateVelocityThisTick();
playerPhysics.CalculateVelocityThisTick();
playerPhysics.CalculateVelocityThisTick();
playerPhysics.CalculateVelocityThisTick();
playerPhysics.CalculateVelocityThisTick();
Assert.AreEqual(0, playerPhysics.GetVelocity());
}