@Test
public void testNegatives() {

    assertThat( getLiteral( int.class.getCanonicalName(), "-0xffaa" ) ).isNotNull();
    assertThat( getLiteral( int.class.getCanonicalName(), "-0377_7777" ) ).isNotNull();
    assertThat( getLiteral( int.class.getCanonicalName(), "-0b1111_1111" ) ).isNotNull();
}