learn_golang/learn_go_with_tests/iteration/repeat_test.go

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
}