@Test
	public void testReadBigBigDecimal() throws Exception {
		BigDecimal bd = new BigDecimal("12345678901234567890");
		Tuple tuple = TupleBuilder.tuple().of("bigd", "12345678901234567890");
		assertEquals(bd, tuple.getBigDecimal(0));
	}
This is a port of the FieldSet tests from Spring Batch
spring-xd-tuple/src/test/java/org/springframework/xd/tuple/DefaultTupleTestForBatch.java