@Test public void testRand() { for (int i = 0; i < 100; ++i) { Vector4 x = Vector4.rand(); assertTrue(x.x >= -1); assertTrue(x.x <= 1); assertTrue(x.y >= -1); assertTrue(x.y <= 1); assertTrue(x.z >= -1); assertTrue(x.z <= 1); assertTrue(x.w >= -1); assertTrue(x.w <= 1); } }