@Test
public void testIsNumber() {

    assertFalse( NativeTypes.isNumber( null ) );
    assertFalse( NativeTypes.isNumber( Object.class ) );
    assertFalse( NativeTypes.isNumber( String.class ) );
    assertTrue( NativeTypes.isNumber( double.class ) );
    assertTrue( NativeTypes.isNumber( Double.class ) );
    assertTrue( NativeTypes.isNumber( long.class ) );
    assertTrue( NativeTypes.isNumber( Long.class ) );
    assertTrue( NativeTypes.isNumber( BigDecimal.class ) );
    assertTrue( NativeTypes.isNumber( BigInteger.class ) );
}