/*
 *
 * Copyright 2015 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.
 *
 */

#include <grpc++/alarm.h>
#include <grpc++/completion_queue.h>
#include <gtest/gtest.h>

#include "test/core/util/test_config.h"

namespace grpc {
namespace {

TEST(AlarmTest, RegularExpiry) {
  CompletionQueue cq;
  void* junk = reinterpret_cast<void*>(1618033);
  Alarm alarm(&cq, grpc_timeout_seconds_to_deadline(1), junk);

  void* output_tag;
  bool ok;
  const CompletionQueue::NextStatus status = cq.AsyncNext(
      (void**)&output_tag, &ok, grpc_timeout_seconds_to_deadline(2));

  EXPECT_EQ(status, CompletionQueue::GOT_EVENT);
  EXPECT_TRUE(ok);
  EXPECT_EQ(junk, output_tag);
}

TEST(AlarmTest, RegularExpiryChrono) {
  CompletionQueue cq;
  void* junk = reinterpret_cast<void*>(1618033);
  std::chrono::system_clock::time_point one_sec_deadline =
      std::chrono::system_clock::now() + std::chrono::seconds(1);
  Alarm alarm(&cq, one_sec_deadline, junk);

  void* output_tag;
  bool ok;
  const CompletionQueue::NextStatus status = cq.AsyncNext(
      (void**)&output_tag, &ok, grpc_timeout_seconds_to_deadline(2));

  EXPECT_EQ(status, CompletionQueue::GOT_EVENT);
  EXPECT_TRUE(ok);
  EXPECT_EQ(junk, output_tag);
}

TEST(AlarmTest, ZeroExpiry) {
  CompletionQueue cq;
  void* junk = reinterpret_cast<void*>(1618033);
  Alarm alarm(&cq, grpc_timeout_seconds_to_deadline(0), junk);

  void* output_tag;
  bool ok;
  const CompletionQueue::NextStatus status = cq.AsyncNext(
      (void**)&output_tag, &ok, grpc_timeout_seconds_to_deadline(0));

  EXPECT_EQ(status, CompletionQueue::GOT_EVENT);
  EXPECT_TRUE(ok);
  EXPECT_EQ(junk, output_tag);
}

TEST(AlarmTest, NegativeExpiry) {
  CompletionQueue cq;
  void* junk = reinterpret_cast<void*>(1618033);
  Alarm alarm(&cq, grpc_timeout_seconds_to_deadline(-1), junk);

  void* output_tag;
  bool ok;
  const CompletionQueue::NextStatus status = cq.AsyncNext(
      (void**)&output_tag, &ok, grpc_timeout_seconds_to_deadline(0));

  EXPECT_EQ(status, CompletionQueue::GOT_EVENT);
  EXPECT_TRUE(ok);
  EXPECT_EQ(junk, output_tag);
}

TEST(AlarmTest, Cancellation) {
  CompletionQueue cq;
  void* junk = reinterpret_cast<void*>(1618033);
  Alarm alarm(&cq, grpc_timeout_seconds_to_deadline(2), junk);
  alarm.Cancel();

  void* output_tag;
  bool ok;
  const CompletionQueue::NextStatus status = cq.AsyncNext(
      (void**)&output_tag, &ok, grpc_timeout_seconds_to_deadline(1));

  EXPECT_EQ(status, CompletionQueue::GOT_EVENT);
  EXPECT_FALSE(ok);
  EXPECT_EQ(junk, output_tag);
}

}  // namespace
}  // namespace grpc

int main(int argc, char** argv) {
  grpc_test_init(argc, argv);
  ::testing::InitGoogleTest(&argc, argv);
  return RUN_ALL_TESTS();
}