@Test
    public void testSphereReductionProportional() {
        LodGenerator lod = new LodGenerator(sphere());
        VertexBuffer[] buffer = lod.computeLods(LodGenerator.TriangleReductionMethod.PROPORTIONAL,
                REDUCTION_VALUES);

        int[] expected = { 240, 120, 108, 96, 84, 72, 60, 48 };
        int[] actual = getBufferSizes(buffer);

        assertArrayEquals(expected, actual);
    }
Tests the LodGenerator with proportional reduction on a sphere(see sphere()).
jme3-core/src/test/java/com/jme3/tools/LodGeneratorTest.java