func testEmptyHandler() {
        performServerTest(router) { expectation in
            self.performRequest("get", path:"/emptyHandler", callback: {response in
                XCTAssertEqual(response?.statusCode, HTTPStatusCode.serviceUnavailable, "HTTP Status code was \(String(describing: response?.statusCode))")
                XCTAssertNotNil(response?.headers["Date"], "There was No Date header in the response")