Add a server push disabled test.

net/tools/quic/end_to_end_test.cc

Index: net/tools/quic/end_to_end_test.cc
diff --git a/net/tools/quic/end_to_end_test.cc b/net/tools/quic/end_to_end_test.cc
index 55e1bf43711c7b932491b296ddf5ea8c7e968610..fa56de6aeb1860efdb35bc528422b33ee71a8239 100644
--- a/net/tools/quic/end_to_end_test.cc
+++ b/net/tools/quic/end_to_end_test.cc
@@ -254,7 +254,8 @@ class EndToEndTest : public ::testing::TestWithParam<TestParams> {
         server_started_(false),
         strike_register_no_startup_period_(false),
         chlo_multiplier_(0),
-        stream_factory_(nullptr) {
+        stream_factory_(nullptr),
+        support_server_push_(false) {
     client_supported_versions_ = GetParam().client_supported_versions;
     server_supported_versions_ = GetParam().server_supported_versions;
     negotiated_version_ = GetParam().negotiated_version;
@@ -343,8 +344,9 @@ class EndToEndTest : public ::testing::TestWithParam<TestParams> {
     // TODO(nimia): Consider setting the congestion control algorithm for the
     // client as well according to the test parameter.
     copt.push_back(GetParam().congestion_control_tag);
-    copt.push_back(kSPSH);
-
+    if (support_server_push_) {
+      copt.push_back(kSPSH);
+    }
     if (GetParam().client_supports_stateless_rejects) {
       copt.push_back(kSREJ);
     }
@@ -520,6 +522,7 @@ class EndToEndTest : public ::testing::TestWithParam<TestParams> {
   bool strike_register_no_startup_period_;
   size_t chlo_multiplier_;
   QuicTestServer::StreamFactory* stream_factory_;
+  bool support_server_push_;
 };
 
 // Run all end to end tests with all supported versions.
@@ -2297,6 +2300,7 @@ class EndToEndTestServerPush : public EndToEndTest {
   EndToEndTestServerPush() : EndToEndTest() {
     FLAGS_quic_supports_push_promise = true;
     client_config_.SetMaxStreamsPerConnection(kNumMaxStreams, kNumMaxStreams);
+    support_server_push_ = true;
   }
 
   // Add a request with its response and |num_resources| push resources into
@@ -2544,6 +2548,38 @@ TEST_P(EndToEndTestServerPush, ServerPushOverLimitWithBlocking) {
   EXPECT_EQ(12u, client_->num_responses());
 }
 
+TEST_P(EndToEndTestServerPush, DisabledWithoutConnectionOption) {
+  // Tests that server push won't be triggered when kSPSH is not set by client.
+  support_server_push_ = false;
+  ASSERT_TRUE(Initialize());
+
+  // Add a response with headers, body, and push resources.
+  const string kBody = "body content";
+  size_t const kNumResources = 4;
+  string push_urls[] = {
+      "https://example.com/font.woff", "https://example.com/script.js",
+      "https://fonts.example.com/font.woff",
+      "https://example.com/logo-hires.jpg",
+  };
+  AddRequestAndResponseWithServerPush("example.com", "/push_example", kBody,
+                                      push_urls, kNumResources, 0);
+  client_->client()->set_response_listener(new TestResponseListener);
+  EXPECT_EQ(kBody, client_->SendSynchronousRequest(
+                       "https://example.com/push_example"));
+
+  for (const string& url : push_urls) {
+    // Sending subsequent requests will trigger sending real requests because
+    // client doesn't support server push.
+    const string expected_body =
+        "This is server push response body for " + url;
+    const string response_body = client_->SendSynchronousRequest(url);
+    EXPECT_EQ(expected_body, response_body);
+  }
+  // Same number of requests are sent as that of responses received.
+  EXPECT_EQ(1 + kNumResources, client_->num_requests());
+  EXPECT_EQ(1 + kNumResources, client_->num_responses());
+}
+
 // TODO(fayang): this test seems to cause net_unittests timeouts :|
 TEST_P(EndToEndTest, DISABLED_TestHugePostWithPacketLoss) {
   // This test tests a huge post with introduced packet loss from client to