}
	}()
	var b Buffer
	b.Write(make([]byte, 10))
	b.Truncate(20)
}

var containsTests = []struct {
	b, subslice []byte
	want        bool
}{
	{[]byte("hello"), []byte("hel"), true},
	{[]byte("日本語"), []byte("日本"), true},
	{[]byte("hello"), []byte("Hello, world"), false},
	{[]byte("東京"), []byte("京東"), false},
}

func TestContains(t *testing.T) {