@Test
    public void testNullField2() {
        mapper = getMapper("mappings/testDozerBeanMapping.xml");
        // Test that String --> String with an empty String input value results
        // in the destination field being an empty String and not null.
        String input = "";
        TestObject src = newInstance(TestObject.class);
        src.setOne(input);

        TestObjectPrime dest = mapper.map(src, TestObjectPrime.class);
        assertNotNull("dest field should not be null", dest.getOnePrime());
        assertEquals("invalid dest field value", input, dest.getOnePrime());
    }
When the source type is a Set and the destination is a Collection we expect that the
mapper narrows to the Set type instead of using a List by default.
<p>
issue https://github.com/DozerMapper/dozer/issues/287
core/src/test/java/com/github/dozermapper/core/functional_tests/GranularDozerBeanMapperTest.java