package iteration import ( "fmt" "testing" ) func TestRepeat(t *testing.T) { t.Run("repeat simple letters", func(t *testing.T) { repeated := Repeat("a", 6) expected := "aaaaaa" if repeated != expected { t.Errorf("expected %q but got %q", expected, repeated) } }) t.Run("repeat words letters", func(t *testing.T) { repeated := Repeat("dog", 5) expected := "dogdogdogdogdog" if repeated != expected { t.Errorf("expected %q but got %q", expected, repeated) } }) } // This test demonstrates benchmark testing https://pkg.go.dev/testing#hdr-Benchmarks func BenchmarkRepeat(b *testing.B) { for i := 0; i < b.N; i++ { Repeat("a", 4) } } func ExampleRepeat() { repeated := Repeat("da", 5) fmt.Println(repeated) // Output: dadadadada }