public void verifyContentContains(URL url, String fileName,
			String data) {
		Assert.notNull(url, "url can not be null");
		Assert.hasText(fileName, "fileName can not be empty nor null");
		Assert.hasText(data, "data can not be empty nor null");
		String result = getDataFromResultFile(url, fileName);
		assertTrue("Could not find data in result file.. Read \""
				+ result + "\"\n but didn't see \"" + data + "\"", result.contains(data));
	}
Verifies that the data user gave us is contained in the result.
@param url The server where the container is deployed.
@param fileName The file that contains the data to check.
@param data The data used to evaluate the results of the stream.
spring-xd-integration-test/src/main/java/org/springframework/xd/integration/util/XdEc2Validation.java