用于指针容器的 Gmock 元素匹配器

Question

在我的单元测试中，我想测试一个GameLauncher 创建一个包含一些Objects 的Game，基于CharacterSelections。在 Java 风格的伪代码中，测试将是：

Game game = gameLauncher.createGame(characterSelections);

assertThat(game.getObjects(), containsInAnyOrder(c1, c2, c3));

当我在 c++ 中工作时，game->getObjects() 返回一个 vector<Object*>。我正在使用指针向量，因为Object 是一种多态类型。

GMock#ContainerMatchers 给出了容器的匹配器列表。由于 STL 容器使用 operator== 来确定其元素之间的相等性（请参阅 github/cpp-container-equality），因此我不能简单地使用 UnorderedElementsAre(...) 因为这将执行指针比较。

我有什么选择？

// redacted includes

class GameLauncherTest : public testing::Test {
    // ... redacted ...
};

TEST_F(GameLauncherTest, launchesGameWithCharacterInstanceForSelectedCharacters) {
    auto const characterSelections = new CharacterSelections();
    characterSelections->add(new CharacterSelection(0, false, 1));
    characterSelections->add(new CharacterSelection(3, false, 0));
    characterSelections->add(new CharacterSelection(2, true, 1));

    Game* const game = this->gameLauncher->launchGame(characterSelections);

    auto const character0 = new Character(0, objectData1);
    auto const character1 = new Character(1, objectData0);
    auto const character2 = new Character(2, objectData1);

    const vector<Object*> inGameObjects = game->getObjects();

    // fails
    EXPECT_THAT(inGameObjects, UnorderedElementsAre(character0, character1, character2));

    delete character0;
    delete character1;
    delete character2;
    delete characterSelections;
}

Answer 1

您可以使用Pointee 匹配器来取消引用指针：

EXPECT_THAT(inGameObjects,
            UnorderedElementsAre(Pointee(*character0),
                                 Pointee(*character1),
                                 Pointee(*character2)));