#include "ranges.hpp"
#include <gtest/gtest.h>

TEST(Ranges, EvenNumbers) {
    EXPECT_EQ(cpp20::even_numbers({1, 2, 3, 4, 5}), (std::vector<int>{2, 4}));
}

TEST(Ranges, TakeFirstThree) {
    EXPECT_EQ(cpp20::take_first_three({9, 8, 7, 6, 5}), (std::vector<int>{9, 8, 7}));
}

TEST(Ranges, JoinStrings) {
    EXPECT_EQ(cpp20::join_strings({"C", "++", "20"}), "C++20");
}