1 files changed, 62 insertions, 0 deletions
diff --git a/grpc/include/grpcpp/test/client_context_test_peer.h b/grpc/include/grpcpp/test/client_context_test_peer.h
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+++ b/grpc/include/grpcpp/test/client_context_test_peer.h
@@ -0,0 +1,62 @@
+/*
+ *
+ * Copyright 2021 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+#ifndef GRPCPP_TEST_CLIENT_CONTEXT_TEST_PEER_H
+#define GRPCPP_TEST_CLIENT_CONTEXT_TEST_PEER_H
+
+#include <map>
+
+#include <grpcpp/client_context.h>
+
+namespace grpc {
+namespace testing {
+
+/// A test-only class to access private members and methods of ClientContext.
+class ClientContextTestPeer {
+ public:
+  explicit ClientContextTestPeer(ClientContext* const ctx) : ctx_(ctx) {}
+
+  /// Inject metadata to the ClientContext for the test. The test peer
+  /// must be alive when a ClientContext::GetServerInitialMetadata is called.
+  void AddServerInitialMetadata(const std::string& key,
+                                const std::string& value) {
+    server_initial_metadata_storage_.insert(
+        std::pair<std::string, std::string>(key, value));
+    ctx_->initial_metadata_received_ = true;
+    ctx_->recv_initial_metadata_.map()->clear();
+    for (const auto& item : server_initial_metadata_storage_) {
+      ctx_->recv_initial_metadata_.map()->insert(
+          std::pair<grpc::string_ref, grpc::string_ref>(
+              item.first.c_str(),
+              grpc::string_ref(item.second.data(), item.second.size())));
+    }
+  }
+
+  std::multimap<std::string, std::string> GetSendInitialMetadata() const {
+    return ctx_->send_initial_metadata_;
+  }
+
+ private:
+  ClientContext* const ctx_;  // not owned
+  std::multimap<std::string, std::string> server_initial_metadata_storage_;
+};
+
+}  // namespace testing
+}  // namespace grpc
+
+#endif  // GRPCPP_TEST_CLIENT_CONTEXT_TEST_PEER_H