package advgroupser

import "testing"

func TestFormatRatePercentage(t *testing.T) {
	t.Run("formats decimal rate as percentage", func(t *testing.T) {
		got := formatRatePercentage(0.1234)
		want := "12.340%"
		if got != want {
			t.Fatalf("expected %s, got %s", want, got)
		}
	})

	t.Run("formats zero as zero percentage", func(t *testing.T) {
		got := formatRatePercentage(0)
		want := "0.000%"
		if got != want {
			t.Fatalf("expected %s, got %s", want, got)
		}
	})
}