// Copyright 2019 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include <io-scheduler/io-scheduler.h>
#include <zxtest/zxtest.h>

namespace ioscheduler {

TEST(UniqueOpTest, CreateNull) {
  UniqueOp ref;  // Null object.
  ASSERT_TRUE(!ref, "Expected false");
  ASSERT_TRUE(ref == nullptr, "Expected null reference");
  StreamOp* op = ref.get();
  ASSERT_EQ(op, nullptr, "Expected null returned from reference");
  op = ref.release();
  ASSERT_EQ(op, nullptr, "Expected null returned from reference");

  // Move construction.
  UniqueOp moved(std::move(ref));
  ASSERT_TRUE(moved == nullptr, "Expected null reference from moved");

  // Move assignment.
  UniqueOp assigned = std::move(moved);
  ASSERT_TRUE(assigned == nullptr, "Expected null reference from assigned");
}

TEST(UniqueOpTest, CreateAllocated) {
  StreamOp* op = new StreamOp;
  UniqueOp ref(op);
  ASSERT_TRUE(ref, "Expected true");
  ASSERT_TRUE(ref != nullptr, "Expected non-null reference");
  ASSERT_EQ(ref.get(), op, "Expected op");

  // Move construction.
  UniqueOp moved(std::move(ref));
  ASSERT_EQ(moved.get(), op, "Expected op from moved");

  // Move assignment.
  UniqueOp assigned = std::move(moved);
  ASSERT_EQ(assigned.get(), op, "Expected op from assigned");

  // Release.
  StreamOp* released = assigned.release();
  ASSERT_EQ(released, op, "Expected op from assigned");
  ASSERT_TRUE(assigned == nullptr, "Expected null reference from assigned");

  delete op;
}

}  // namespace ioscheduler