@Test
    public void testGlobalNullAndEmptyString() {
        Mapper mapperMapNull = DozerBeanMapperBuilder.buildDefault();
        Mapper mapperNotMapNull = DozerBeanMapperBuilder.create()
                .withMappingFiles("mappings/customGlobalConfigWithNullAndEmptyStringTest.xml")
                .build();
        Van src = new Van();
        Van dest = new Van();
        dest.setName("not null or empty");

        mapperNotMapNull.map(src, dest);
        assertEquals("not null or empty", dest.getName());

        mapperMapNull.map(src, dest);
        assertNull(dest.getName());
    }
Very high level tests of the DozerBeanMapper. This test class is not intended to provide in-depth testing of all the
possible mapping use cases. The more in-depth unit tests of the DozerBeanMapper and MappingProcessor can be found in
other test classes within this same package. i.e) GranularDozerBeanMapperTest, MapperTest, IndexMappingTest, etc
core/src/test/java/com/github/dozermapper/core/functional_tests/DozerBeanMapperTest.java