@Test
	public void testReadRawString() {
		String name = "fieldName";
		String value = " string with trailing whitespace   ";
		Tuple t = tuple().of(name, value);

		assertEquals(value, t.getRawString(0));
		assertEquals(value, t.getRawString(name));
	}
This is a port of the FieldSet tests from Spring Batch
spring-xd-tuple/src/test/java/org/springframework/xd/tuple/DefaultTupleTestForBatch.java