fn test_repeat() { r1 := `V` r2 := `👋` assert r1.repeat(5) == 'VVVVV' assert r2.repeat(5) == '👋👋👋👋👋' assert r1.repeat(1) == r1.str() assert r2.repeat(1) == r2.str() assert r1.repeat(0) == '' assert r2.repeat(0) == '' }