File: hello_world.cpp

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doctest 1.2.9%2Brepack0-1
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#define DOCTEST_CONFIG_IMPLEMENT_WITH_MAIN
#include "doctest.h"

int fact(int n) {
    return n <= 1 ? n : fact(n - 1) * n;
}

TEST_CASE("testing the factorial function") {
    CHECK(fact(0) == 1); // should fail
    CHECK(fact(1) == 1);
    CHECK(fact(2) == 2);
    CHECK(fact(3) == 6);
    CHECK(fact(10) == 3628800);
}