@Test(expected = IllegalArgumentException.class)
    public void iaeCase01() {
        new Camera(1, 1).setViewPort(0.5f, 0.5f, 0f, 1f);
    }
Verifies that setViewPort() with left = right throws an
IllegalArgumentException.
jme3-core/src/test/java/com/jme3/renderer/Issue2333Test.java