public void CollisionHelper_FindCollision_WhenNoMovingEntity_ShouldReturnNull()
{
// Arrange
Entity e1 = new EntityWall(0, 0, 5, 5); // X1=0, Y1=0, X2=4, Y2=4
Entity e2 = new EntityWall(5, 0, 5, 5); // X1=5, Y1=0, X2=9, Y2=9
// Act
Collision c1 = e1.FindCollision(e2);
Collision c2 = e2.FindCollision(e1);
// Assert
Assert.IsNull(c1);
Assert.IsNull(c2);
}
public void CollisionHelper_FindCollision_WhenWillEndAsCollision_ShouldReturnNull()
{
// Arrange
Entity e1 = new EntityWall(0, 0, 5, 5); // X1=0, Y1=0, X2=4, Y2=4
Entity e2 = new EntityWall(7, 0, 5, 5); // X1=5, Y1=0, X2=9, Y2=9
e1.Speed = new Vector(1, 0);
e2.Speed = new Vector(-1, 0);
// Act
Collision c1 = e1.FindCollision(e2);
Collision c2 = e2.FindCollision(e1);
// Assert
Assert.IsNull(c1);
Assert.IsNull(c2);
}
public void CollisionHelper_FindCollision_WhenAreAlreadyColliding_ShouldReturnCollisionWithZeroFractionBefore()
{
// Arrange
Entity e1 = new EntityWall(0, 0, 5, 5); // X1=0, Y1=0, X2=4, Y2=4
Entity e2 = new EntityWall(5, 0, 5, 5); // X1=5, Y1=0, X2=9, Y2=9
e1.Speed = new Vector(1, 0);
e2.Speed = new Vector(-1, 0);
// Act
Collision c1 = e1.FindCollision(e2);
Collision c2 = e2.FindCollision(e1);
// Assert
Assert.AreEqual(0, c1.FractionBefore);
Assert.AreEqual(0, c2.FractionBefore);
}
