[lang-ref] ( drop_last_n ) ( cpp )

TEST(StringSlice, DropLastN) {
    // s.substr(0, s.size() - n)
    string text = "0123456789";
    size_t n = 3;

    string part = text.substr(0, text.size() - n);

    EXPECT_EQ(part, "0123456");
}