[lang-ref] ( is_subset ) ( cpp )

TEST(SetOperation, IsSubsetAlternative) {
    // std::includes(...)
    set<int> a = { 1, 2, 3, 4, 5 };
    set<int> b = { 2, 5 };

	EXPECT_TRUE  (includes(a.begin(), a.end(), b.begin(), b.end()));
	EXPECT_FALSE (includes(b.begin(), b.end(), a.begin(), a.end()));
}