utility/tests/ThreadSafeQueue_unittest.cpp

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 * Licensed to the Apache Software Foundation (ASF) under one
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 * 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
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 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
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// 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