public void ShouldMoveWithConstantSpeedWhenNoAcceleration()
{
var particle = new Particle(Vector2D.Zero, new Vector2D(1, 0));
particle.Move(TimeSpan.FromSeconds(1));
Assert.That(particle.Position, Is.EqualTo(new Vector2D(1, 0)));
Assert.That(particle.Velocity, Is.EqualTo(new Vector2D(1, 0)));
particle.Move(TimeSpan.FromSeconds(1));
Assert.That(particle.Position, Is.EqualTo(new Vector2D(2, 0)));
Assert.That(particle.Velocity, Is.EqualTo(new Vector2D(1, 0)));
}
public void ShouldAccelerate()
{
var particle = new Particle(Vector2D.Zero, Vector2D.Zero, new Vector2D(1, 0));
particle.Move(TimeSpan.FromSeconds(1));
Assert.That(particle.Position, Is.EqualTo(new Vector2D(1, 0)));
Assert.That(particle.Velocity, Is.EqualTo(new Vector2D(1, 0)));
particle.Move(TimeSpan.FromSeconds(1));
Assert.That(particle.Position, Is.EqualTo(new Vector2D(3, 0)));
Assert.That(particle.Velocity, Is.EqualTo(new Vector2D(2, 0)));
}
public void ShouldNotMoveWhenNoVelocity()
{
var particle = new Particle(Vector2D.Zero);
particle.Move(TimeSpan.FromSeconds(1));
Assert.That(particle.Position, Is.EqualTo(Vector2D.Zero));
}
