@Test(expected = IllegalArgumentException.class)
    public void iaeCase16() {
        new Camera(1, 1).setViewPort(0f, 1f, 0f, Float.NaN);
    }
Verifies that setViewPort() with top = NaN throws an
IllegalArgumentException.
jme3-core/src/test/java/com/jme3/renderer/Issue2333Test.java