Function TEST

library/cpp/iterator/ut/mapped_ut.cpp:18–33

}

TEST(TIterator, TMappedIteratorTest) {
    TVector<int> x = {1, 2, 3, 4, 5};
    auto it = MakeMappedIterator(x.begin(), [](int x) { return x + 7; });

    EXPECT_EQ(*it, 8);
    EXPECT_EQ(it[2], 10);

    TVector<std::pair<int, int>> pairs = {{1, 2}, {3, 4}, {5, 6}};
    auto firstIt = MakeMappedIterator(pairs.begin(), TSelectFirst{});
    EXPECT_EQ(*std::next(firstIt, 0), 1);
    EXPECT_EQ(*std::next(firstIt, 1), 3);
    EXPECT_EQ(*std::next(firstIt, 2), 5);
#if defined(_compiler_clang_) && defined(_linux_)
    static_assert(sizeof(pairs.begin()) == sizeof(firstIt), "empty mapper should not add size overhead");  // this check expected to hold, but not guaranteed to
#endif
}

TEST(TIterator, TMappedRangeTest) {
    TVector<int> x = {1, 2, 3, 4, 5};