@Test
public void testIsSigned() {

    assertTrue(TypeMap.isSigned(SampleDimensionType.REAL_32BITS));
    assertTrue(TypeMap.isSigned(SampleDimensionType.REAL_64BITS));
    assertTrue(TypeMap.isSigned(SampleDimensionType.SIGNED_16BITS));
    assertTrue(TypeMap.isSigned(SampleDimensionType.SIGNED_32BITS));
    assertTrue(TypeMap.isSigned(SampleDimensionType.SIGNED_8BITS));
    assertFalse(TypeMap.isSigned(SampleDimensionType.UNSIGNED_16BITS));
    assertFalse(TypeMap.isSigned(SampleDimensionType.UNSIGNED_1BIT));
    assertFalse(TypeMap.isSigned(SampleDimensionType.UNSIGNED_2BITS));
    assertFalse(TypeMap.isSigned(SampleDimensionType.UNSIGNED_32BITS));
    assertFalse(TypeMap.isSigned(SampleDimensionType.UNSIGNED_4BITS));
    assertFalse(TypeMap.isSigned(SampleDimensionType.UNSIGNED_8BITS));
    
}