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#include <gtest/gtest.h>

#include "../sched.hpp"

struct DebugQueue : public Queue<Task> {
public:
  void
  expect_ordered() const
  {
    int id = 1;
    for (auto *it = head; it != nullptr; it = it->next) {
      // std::cout << it->node->name << std::endl;
      EXPECT_EQ(it->node->id, id++);
    }
  }
};

TEST(taskqueue, insert)
{
  DebugQueue queue;
  auto *p1 = new Task{"P1", 1, 1, 10};
  queue.insert(p1);
  queue.insert(new Task{"P2", 2, 1, 10});
  queue.insert(new Task{"P3", 3, 1, 10});
  auto *p4 = new Task{"P4", 4, 1, 10};
  queue.insert(p4);
  queue.expect_ordered();

  EXPECT_EQ(queue.head->node, p1);
  EXPECT_EQ(queue.tail->node, p4);
}

TEST(taskqueue, removeHead)
{
  DebugQueue queue;
  auto *p0 = new Task{"P0", 0, 1, 10};
  queue.insert(p0);
  auto *p1 = new Task{"P1", 1, 1, 10};
  queue.insert(p1);
  queue.insert(new Task{"P2", 2, 1, 10});
  queue.insert(new Task{"P3", 3, 1, 10});
  auto *p4 = new Task{"P4", 4, 1, 10};
  queue.insert(p4);
  queue.remove(p0);
  delete p0;

  EXPECT_EQ(queue.head->node, p1);
  EXPECT_EQ(queue.tail->node, p4);
  queue.expect_ordered();
}

TEST(taskqueue, removeTail)
{
  DebugQueue queue;
  auto *p1 = new Task{"P1", 1, 1, 10};
  queue.insert(p1);
  queue.insert(new Task{"P2", 2, 1, 10});
  queue.insert(new Task{"P3", 3, 1, 10});
  auto *p4 = new Task{"P4", 4, 1, 10};
  queue.insert(p4);
  auto *p5 = new Task{"P5", 5, 1, 10};
  queue.insert(p5);
  EXPECT_EQ(queue.head->node, p1);
  EXPECT_EQ(queue.tail->node, p5);

  queue.remove(p5);
  delete p5;

  EXPECT_EQ(queue.head->node, p1);
  EXPECT_EQ(queue.tail->node, p4);
  queue.expect_ordered();
}

TEST(taskqueue, removeLast)
{
  DebugQueue queue;

  auto *p0 = new Task{"P0", 0, 1, 10};
  queue.insert(p0);
  EXPECT_EQ(queue.head->node, p0);
  EXPECT_EQ(queue.tail->node, p0);

  queue.remove(p0);
  delete p0;

  EXPECT_EQ(queue.head, nullptr);
  EXPECT_EQ(queue.tail, nullptr);
}

TEST(taskqueue, removeNullptr)
{
  DebugQueue queue;
  queue.insert(new Task{"P1", 1, 1, 10});
  queue.insert(new Task{"P2", 2, 1, 10});
  queue.insert(new Task{"P3", 3, 1, 10});
  queue.insert(new Task{"P4", 4, 1, 10});
  queue.remove(nullptr);
  queue.expect_ordered();
}

TEST(taskqueue, remove)
{
  DebugQueue queue;
  auto *p1 = new Task{"P1", 1, 1, 10};
  queue.insert(p1);
  queue.insert(new Task{"P2", 2, 1, 10});
  auto *p0 = new Task{"P0", 0, 1, 10};
  queue.insert(p0);
  queue.insert(new Task{"P3", 3, 1, 10});
  auto *p4 = new Task{"P4", 4, 1, 10};
  queue.insert(p4);

  EXPECT_EQ(queue.head->node, p1);
  EXPECT_EQ(queue.tail->node, p4);

  queue.remove(p0);
  delete p0;

  EXPECT_EQ(queue.head->node, p1);
  EXPECT_EQ(queue.tail->node, p4);
  queue.expect_ordered();
}