t.Errorf("writeString: expected %q, got %q", writeString, w.writeString)
	}
}

func TestBufferFull(t *testing.T) {
	const longString = "And now, hello, world! It is the time for all good men to come to the aid of their party"
	buf := NewReaderSize(strings.NewReader(longString), minReadBufferSize)
	line, err := buf.ReadSlice('!')
	if string(line) != "And now, hello, " || err != ErrBufferFull {
		t.Errorf("first ReadSlice(,) = %q, %v", line, err)