Working on tests

1 files changed, 122 insertions, 10 deletions

diff --git a/test/cpp/end2end/client_interceptors_end2end_test.cc b/test/cpp/end2end/client_interceptors_end2end_test.cc
index 8537f35602..2e0db8a9b9 100644
--- a/test/cpp/end2end/client_interceptors_end2end_test.cc
+++ b/test/cpp/end2end/client_interceptors_end2end_test.cc
@@ -60,6 +60,8 @@ class ClientInterceptorsEnd2endTest : public ::testing::Test {
   std::unique_ptr<Server> server_;
 };
 
+/* This interceptor does nothing. Just keeps a global count on the number of
+ * times it was invoked. */
 class DummyInterceptor : public experimental::Interceptor {
  public:
   DummyInterceptor(experimental::ClientRpcInfo* info) {}
@@ -91,6 +93,7 @@ class DummyInterceptorFactory
   }
 };
 
+/* Hijacks Echo RPC and fills in the expected values */
 class HijackingInterceptor : public experimental::Interceptor {
  public:
   HijackingInterceptor(experimental::ClientRpcInfo* info) {
@@ -195,6 +198,111 @@ class HijackingInterceptorFactory
   }
 };
 
+class HijackingInterceptorMakesAnotherCall : public experimental::Interceptor {
+ public:
+  HijackingInterceptorMakesAnotherCall(experimental::ClientRpcInfo* info) {
+    info_ = info;
+    // Make sure it is the right method
+    EXPECT_EQ(strcmp("/grpc.testing.EchoTestService/Echo", info->method()), 0);
+  }
+
+  virtual void Intercept(experimental::InterceptorBatchMethods* methods) {
+    gpr_log(GPR_ERROR, "ran this");
+    bool hijack = false;
+    if (methods->QueryInterceptionHookPoint(
+            experimental::InterceptionHookPoints::PRE_SEND_INITIAL_METADATA)) {
+      auto* map = methods->GetSendInitialMetadata();
+      // Check that we can see the test metadata
+      ASSERT_EQ(map->size(), 1);
+      auto iterator = map->begin();
+      EXPECT_EQ("testkey", iterator->first);
+      EXPECT_EQ("testvalue", iterator->second);
+      hijack = true;
+      // Make a copy of the map
+      metadata_map_ = *map;
+    }
+    if (methods->QueryInterceptionHookPoint(
+            experimental::InterceptionHookPoints::PRE_SEND_MESSAGE)) {
+      EchoRequest req;
+      auto* buffer = methods->GetSendMessage();
+      auto copied_buffer = *buffer;
+      SerializationTraits<EchoRequest>::Deserialize(&copied_buffer, &req);
+      EXPECT_EQ(req.message(), "Hello");
+      auto stub = grpc::testing::EchoTestService::NewStub(
+          std::shared_ptr<Channel>(info_->channel()));
+      ClientContext ctx;
+      EchoResponse resp;
+      Status s = stub->Echo(&ctx, req, &resp);
+      EXPECT_EQ(s.ok(), true);
+      EXPECT_EQ(resp.message(), "Hello");
+    }
+    if (methods->QueryInterceptionHookPoint(
+            experimental::InterceptionHookPoints::PRE_SEND_CLOSE)) {
+      // Got nothing to do here for now
+    }
+    if (methods->QueryInterceptionHookPoint(
+            experimental::InterceptionHookPoints::POST_RECV_INITIAL_METADATA)) {
+      auto* map = methods->GetRecvInitialMetadata();
+      // Got nothing better to do here for now
+      EXPECT_EQ(map->size(), 0);
+    }
+    if (methods->QueryInterceptionHookPoint(
+            experimental::InterceptionHookPoints::POST_RECV_MESSAGE)) {
+      EchoResponse* resp =
+          static_cast<EchoResponse*>(methods->GetRecvMessage());
+      // Check that we got the hijacked message, and re-insert the expected
+      // message
+      EXPECT_EQ(resp->message(), "Hello1");
+      resp->set_message("Hello");
+    }
+    if (methods->QueryInterceptionHookPoint(
+            experimental::InterceptionHookPoints::POST_RECV_STATUS)) {
+      auto* map = methods->GetRecvTrailingMetadata();
+      bool found = false;
+      // Check that we received the metadata as an echo
+      for (const auto& pair : *map) {
+        found = pair.first.starts_with("testkey") &&
+                pair.second.starts_with("testvalue");
+        if (found) break;
+      }
+      EXPECT_EQ(found, true);
+      auto* status = methods->GetRecvStatus();
+      EXPECT_EQ(status->ok(), true);
+    }
+    if (methods->QueryInterceptionHookPoint(
+            experimental::InterceptionHookPoints::PRE_RECV_INITIAL_METADATA)) {
+      auto* map = methods->GetRecvInitialMetadata();
+      // Got nothing better to do here at the moment
+      EXPECT_EQ(map->size(), 0);
+    }
+    if (methods->QueryInterceptionHookPoint(
+            experimental::InterceptionHookPoints::PRE_RECV_MESSAGE)) {
+      // Insert a different message than expected
+      EchoResponse* resp =
+          static_cast<EchoResponse*>(methods->GetRecvMessage());
+      resp->set_message("Hello1");
+    }
+    if (methods->QueryInterceptionHookPoint(
+            experimental::InterceptionHookPoints::PRE_RECV_STATUS)) {
+      auto* map = methods->GetRecvTrailingMetadata();
+      // insert the metadata that we want
+      EXPECT_EQ(map->size(), 0);
+      map->insert(std::make_pair("testkey", "testvalue"));
+      auto* status = methods->GetRecvStatus();
+      *status = Status(StatusCode::OK, "");
+    }
+    if (hijack) {
+      methods->Hijack();
+    } else {
+      methods->Proceed();
+    }
+  }
+
+ private:
+  experimental::ClientRpcInfo* info_;
+  std::multimap<grpc::string, grpc::string> metadata_map_;
+};
+
 class LoggingInterceptor : public experimental::Interceptor {
  public:
   LoggingInterceptor(experimental::ClientRpcInfo* info) {
@@ -268,6 +376,19 @@ class LoggingInterceptorFactory
   }
 };
 
+void MakeCall(std::shared_ptr<Channel> channel) {
+  auto stub = grpc::testing::EchoTestService::NewStub(channel);
+  ClientContext ctx;
+  EchoRequest req;
+  req.mutable_param()->set_echo_metadata(true);
+  ctx.AddMetadata("testkey", "testvalue");
+  req.set_message("Hello");
+  EchoResponse resp;
+  Status s = stub->Echo(&ctx, req, &resp);
+  EXPECT_EQ(s.ok(), true);
+  EXPECT_EQ(resp.message(), "Hello");
+}
+
 TEST_F(ClientInterceptorsEnd2endTest, ClientInterceptorLoggingTest) {
   ChannelArguments args;
   DummyInterceptor::Reset();
@@ -284,16 +405,7 @@ TEST_F(ClientInterceptorsEnd2endTest, ClientInterceptorLoggingTest) {
   }
   auto channel = experimental::CreateCustomChannelWithInterceptors(
       server_address_, InsecureChannelCredentials(), args, std::move(creators));
-  auto stub = grpc::testing::EchoTestService::NewStub(channel);
-  ClientContext ctx;
-  EchoRequest req;
-  req.mutable_param()->set_echo_metadata(true);
-  ctx.AddMetadata("testkey", "testvalue");
-  req.set_message("Hello");
-  EchoResponse resp;
-  Status s = stub->Echo(&ctx, req, &resp);
-  EXPECT_EQ(s.ok(), true);
-  EXPECT_EQ(resp.message(), "Hello");
+  MakeCall(channel);
   // Make sure all 20 dummy interceptors were run
   EXPECT_EQ(DummyInterceptor::GetNumTimesRun(), 20);
 }