private void assertValidFile(String data, URL url, String streamName) {
		String fileName = XdEnvironment.RESULT_LOCATION + "/" + streamName
				+ ".out";
		waitForPath(pauseTime * 2000, fileName);
		validation.verifyTestContent(url, fileName, data);
	}
Asserts the file data to see if it matches what is expected.

@param data The data to validate the file content against
@param url The URL of the server that we will ssh, to get the data
@param streamName the name of the file we are retrieving from the remote server
spring-xd-integration-test/src/test/java/org/springframework/xd/integration/test/AbstractIntegrationTest.java