// Copyright 2012 The ChromiumOS Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include <gtest/gtest.h>

#include "include/macros.h"
#include "include/util.h"

namespace gestures {

class UtilTest : public ::testing::Test {};

TEST(UtilTest, DistSqTest) {
  FingerState fs[] = {
    // TM, Tm, WM, Wm, Press, Orientation, X, Y, TrID
    {0, 0, 0, 0, 1, 0, 1, 2, 1, 0},
    {0, 0, 0, 0, 1, 0, 4, 6, 1, 0}
  };
  EXPECT_FLOAT_EQ(DistSq(fs[0], fs[1]), 25);
  EXPECT_FLOAT_EQ(DistSqXY(fs[0], 4, 6), 25);
}

TEST(UtilTest, ListAtTest) {
  const int kMaxElements = 3;
  struct element {
    int x;
  };

  List<element> list;

  for (auto i = 0; i < kMaxElements; ++i) {
    auto& elem = list.emplace_back();
    elem.x = i;
  }
  EXPECT_EQ(list.at(-1).x, list.at(list.size() - 1).x);

  for (auto i = 0; i < kMaxElements; ++i) {
    for (auto j = 0; j < kMaxElements; ++j) {
      if (i == j) {
        EXPECT_EQ(list.at(i).x, list.at(j).x);
        EXPECT_EQ(&(list.at(i)), &(list.at(j)));
      } else {
        EXPECT_NE(list.at(i).x, list.at(j).x);
        EXPECT_NE(&(list.at(i)), &(list.at(j)));
      }
    }
  }
}

TEST(UtilTest, ListAtDeathForwardTest) {
  List<int> list;
  const int kMaxElements = 3;

  for (auto i = 0; i < kMaxElements; ++i) {
    list.emplace_back(i);
  }
  EXPECT_DEATH(list.at(kMaxElements+1), "");
}

TEST(UtilTest, ListAtDeathBackwardTest) {
  List<int> list;
  const int kMaxElements = 3;

  for (auto i = 0; i < kMaxElements; ++i) {
    list.emplace_back(i);
  }
  EXPECT_DEATH(list.at(-(kMaxElements+1)), "");
}

}  // namespace gestures