@Test
	public void testTcpClientSource() {
		stream(sources.tcpClientSource() + XD_DELIMITER + sinks.file());
		assertFileContains("UOHSO638abna9beqw12");
	}
Verifies that the TCP Client Source Retrieves a fixed string from service.
spring-xd-integration-test/src/test/java/org/springframework/xd/integration/test/TcpClientTests.java