    @Test
    public void getPrimitiveTypeNameFromWrapper() {

        assertPrimitiveName(Byte.TYPE, Byte.class);
        assertPrimitiveName(Short.TYPE, Short.class);
        assertPrimitiveName(Integer.TYPE, Integer.class);
        assertPrimitiveName(Long.TYPE, Long.class);
        assertPrimitiveName(Float.TYPE, Float.class);
        assertPrimitiveName(Double.TYPE, Double.class);

        assertNull(PrimitiveUtils.getPrimitiveTypeNameFromWrapper(getClass()));
        assertNull(PrimitiveUtils.getPrimitiveTypeNameFromWrapper(Long.TYPE));
    }