1package main
 2
 3import (
 4	"bytes"
 5	"testing"
 6)
 7
 8func TestGreet(t *testing.T) {
 9	buffer := bytes.Buffer{}
10	Greet(&buffer, "mo")
11
12	got := buffer.String()
13	want := "Hello, mo"
14
15	if got != want {
16		t.Errorf("got %q want %q", got, want)
17	}
18}