void () { // see http://ru.onlinemschool.com/math/library/vector/add_subtract/ assertEquals(Vector.create(-3, -6), Vector.create(1, 2).minus(Vector.create(4, 8))); assertEquals(Vector.create(-3, -6, 4), Vector.create(1, 2, 5).minus(Vector.create(4, 8, 1))); assertEquals(Vector.create(-3, -6, 4, 0, 3), Vector.create(1, 2, 5, -1, 5).minus(Vector.create(4, 8, 1, -1, 2))); }