/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 **/

// TODO(chasseur): This test is FAR from complete. For now it just does the
// bare minimum of making sure a ThreadSafeQueue can be created and
// pushed/popped from a single thread.

#include "gtest/gtest.h"
#include "utility/ThreadSafeQueue.hpp"

namespace quickstep {

TEST(ThreadSafeQueueTest, IntPushPopTest) {
  ThreadSafeQueue<int> int_queue;
  EXPECT_TRUE(int_queue.empty());
  EXPECT_EQ(0u, int_queue.size());

  int pop_destination = 0;
  EXPECT_FALSE(int_queue.popOneIfAvailable(&pop_destination));
  EXPECT_EQ(0, pop_destination);

  int_queue.push(42);
  EXPECT_FALSE(int_queue.empty());
  EXPECT_EQ(1u, int_queue.size());

  int_queue.push(2001);
  EXPECT_FALSE(int_queue.empty());
  EXPECT_EQ(2u, int_queue.size());

  int popped = int_queue.popOne();
  EXPECT_EQ(42, popped);
  EXPECT_FALSE(int_queue.empty());
  EXPECT_EQ(1u, int_queue.size());

  EXPECT_TRUE(int_queue.popOneIfAvailable(&pop_destination));
  EXPECT_EQ(2001, pop_destination);
  EXPECT_TRUE(int_queue.empty());
  EXPECT_EQ(0u, int_queue.size());
}

}  // namespace quickstep