void TestMatching() {
    const int doc_id = 42;
    const string content = "cat in the city"s;
    const vector<int> ratings = {1, 2, 3};

    // находит нужный документ
    {
        SearchServer server;
        server.AddDocument(doc_id, content, DocumentStatus::ACTUAL, ratings);
        const auto [words, status] = server.MatchDocument("in", 42);
        ASSERT(status == DocumentStatus::ACTUAL);
        ASSERT_EQUAL(words.size(), 1);
        ASSERT_EQUAL(words[0], "in");
    }
}