#define CATCH_CONFIG_MAIN
#include <catch2/catch.hpp>

char getTimeCategory(int hour);

TEST_CASE("Returns 'm' for morning hours (5-11)", "[getTimeCategory]") {
    for (int h = 5; h <= 11; ++h) {
        REQUIRE(getTimeCategory(h) == 'm');
    }
}

TEST_CASE("Returns 'a' for afternoon hours (12-16)", "[getTimeCategory]") {
    for (int h = 12; h <= 16; ++h) {
        REQUIRE(getTimeCategory(h) == 'a');
    }
}

TEST_CASE("Returns 'e' for evening hours (17-20)", "[getTimeCategory]") {
    for (int h = 17; h <= 20; ++h) {
        REQUIRE(getTimeCategory(h) == 'e');
    }
}

TEST_CASE("Returns 'n' for night hours (21-23, 0-4)", "[getTimeCategory]") {
    for (int h = 21; h <= 23; ++h) {
        REQUIRE(getTimeCategory(h) == 'n');
    }
    for (int h = 0; h <= 4; ++h) {
        REQUIRE(getTimeCategory(h) == 'n');
    }
}

TEST_CASE("Returns 'x' for invalid hours (<0 or >23)", "[getTimeCategory]") {
    REQUIRE(getTimeCategory(-1) == 'x');
    REQUIRE(getTimeCategory(24) == 'x');
    REQUIRE(getTimeCategory(100) == 'x');
    REQUIRE(getTimeCategory(-10) == 'x');
}

test.cpp

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Challenge: Determine Time-of-Day Category

Solution