Add tests

java/ql/test/library-tests/frameworks/spring/websocket/Test.java

@@ -0,0 +1,22 @@
+
+import org.springframework.web.socket.handler.TextWebSocketHandler;
+import org.springframework.web.socket.WebSocketSession;
+import org.springframework.web.socket.WebSocketMessage;
+
+
+public class Test extends TextWebSocketHandler {
+    void sink(Object o) {}
+
+    @Override
+    public void handleMessage(WebSocketSession s, WebSocketMessage<?> m) {
+        sink(s); // $hasTaintFlow
+        sink(s.getAcceptedProtocol()); // $hasTaintFlow
+        sink(s.getHandshakeHeaders()); // $hasTaintFlow
+        sink(s.getPrincipal()); // $hasTaintFlow
+        sink(s.getUri()); // $hasTaintFlow
+
+        sink(m); // $hasTaintFlow
+        sink(m.getPayload()); // $hasTaintFlow
+
+    }
+}