Fix flaky testHttpsProxy_Http2Origin_tunnelled

Author: gaganis

vertx-core/src/test/java/io/vertx/tests/http/HttpsProxyTest.java

@@ -11,6 +11,7 @@
 package io.vertx.tests.http;
 
 import io.vertx.core.buffer.Buffer;
+
 import io.vertx.core.http.HttpClientOptions;
 import io.vertx.core.http.HttpClientResponse;
 import io.vertx.core.http.HttpMethod;
@@ -135,15 +136,14 @@ public void testHttpsProxy_Http2Origin_tunnelled() throws Exception {
       .setTrustOptions(Trust.SERVER_JKS.get())
       .setProxyOptions(httpsProxy(proxy.port())));
 
-    HttpClientResponse resp = client.request(new RequestOptions().setMethod(HttpMethod.GET)
+    String result = client.request(new RequestOptions().setMethod(HttpMethod.GET)
         .setHost(DEFAULT_HTTPS_HOST).setPort(DEFAULT_HTTPS_PORT).setURI("/"))
       .compose(req -> req.send().expecting(HttpResponseExpectation.SC_OK))
+      .compose(resp -> resp.body().map(body -> resp.version() + ":" + body))
       .await();
-    Buffer body = resp.body().await();
 
-    assertEquals("Hello from origin", body.toString());
-    assertEquals(HttpVersion.HTTP_2, resp.version());
     // h2 rides the CONNECT tunnel for free; ALPN negotiates h2 end-to-end with the origin.
+    assertEquals(HttpVersion.HTTP_2 + ":Hello from origin", result);
     assertEquals(HttpMethod.CONNECT, proxy.getLastMethod());
   }