@Test
	public void testReadIntWithNullValue() {
		assertThat(5, equalTo(tuple.getInt(10, 5)));
		assertThat(5, equalTo(tuple.getInt("Null", 5)));
	}
This is a port of the FieldSet tests from Spring Batch
spring-xd-tuple/src/test/java/org/springframework/xd/tuple/DefaultTupleTestForBatch.java