}
	// Does it wrap if existing buffer is too small?
	b2 := NewWriterSize(b, 2*BufSize)
	if b2 == b {
		t.Error("NewWriterSize did not enlarge buffer")
	}
}

func TestWriteString(t *testing.T) {
	const BufSize = 8
	buf := new(strings.Builder)
	b := NewWriterSize(buf, BufSize)
	b.WriteString("0")                         // easy
	b.WriteString("123456")                    // still easy