public void MoveToKeyboardOverridesExistingKeyboardComponent()
{
// The only way to test this is to change the velocity and see if the new velocity number is used
// Set velocity to 100, press D, wait one second; we should move 100px to the right.
var expectedVelocity = 100;
var entity = new CobaltEntity();
entity.MoveToKeyboard(1);
entity.MoveToKeyboard(expectedVelocity);
KeyboardSystem.GenerateKeysCallback(() =>
{
// Press D to move X positively
return(new Keys[] { Keys.D });
});
// Simulate keypress
var keyboardSystem = new KeyboardSystem();
keyboardSystem.Add(entity);
keyboardSystem.Update(1);
var velocitySystem = new VelocitySystem();
velocitySystem.Add(entity);
velocitySystem.Update(1);
Assert.That(entity.Get <PositionComponent>().X, Is.EqualTo(expectedVelocity));
}
public void UpdateUpdatesPositionRelativeToElapsedTime()
{
var vX = 17;
var vY = -19;
var velocity = new VelocityComponent(vX, vY);
var pX = 400;
var pY = 128;
var position = new PositionComponent(pX, pY);
var elapsed = 0.7f;
var e = new CobaltEntity();
e.Set(velocity);
e.Set(position);
var system = new VelocitySystem();
system.Add(e);
system.Update(elapsed);
Assert.That(position.X, Is.EqualTo(pX + (elapsed * vX)));
Assert.That(position.Y, Is.EqualTo(pY + (elapsed * vY)));
}
