// Copyright 2012 The Chromium 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 "base/stl_util.h"

#include <set>

#include "testing/gtest/include/gtest/gtest.h"

namespace base {
namespace {

TEST(STLUtilTest, STLIsSorted) {
  {
    std::set<int> set;
    set.insert(24);
    set.insert(1);
    set.insert(12);
    EXPECT_TRUE(STLIsSorted(set));
  }

  {
    std::vector<int> vector;
    vector.push_back(1);
    vector.push_back(1);
    vector.push_back(4);
    vector.push_back(64);
    vector.push_back(12432);
    EXPECT_TRUE(STLIsSorted(vector));
    vector.back() = 1;
    EXPECT_FALSE(STLIsSorted(vector));
  }
}

TEST(STLUtilTest, STLSetDifference) {
  std::set<int> a1;
  a1.insert(1);
  a1.insert(2);
  a1.insert(3);
  a1.insert(4);

  std::set<int> a2;
  a2.insert(3);
  a2.insert(4);
  a2.insert(5);
  a2.insert(6);
  a2.insert(7);

  {
    std::set<int> difference;
    difference.insert(1);
    difference.insert(2);
    EXPECT_EQ(difference, STLSetDifference<std::set<int> >(a1, a2));
  }

  {
    std::set<int> difference;
    difference.insert(5);
    difference.insert(6);
    difference.insert(7);
    EXPECT_EQ(difference, STLSetDifference<std::set<int> >(a2, a1));
  }

  {
    std::vector<int> difference;
    difference.push_back(1);
    difference.push_back(2);
    EXPECT_EQ(difference, STLSetDifference<std::vector<int> >(a1, a2));
  }

  {
    std::vector<int> difference;
    difference.push_back(5);
    difference.push_back(6);
    difference.push_back(7);
    EXPECT_EQ(difference, STLSetDifference<std::vector<int> >(a2, a1));
  }
}

}  // namespace
}  // namespace base