| // Copyright 2009 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| package io_test |
| |
| import ( |
| "bytes"; |
| . "io"; |
| "testing"; |
| ) |
| |
| // An version of bytes.Buffer without ReadFrom and WriteTo |
| type Buffer struct { |
| bytes.Buffer; |
| ReaderFrom; // conflicts with and hides bytes.Buffer's ReaderFrom. |
| WriterTo; // conflicts with and hides bytes.Buffer's WriterTo. |
| } |
| |
| // Simple tests, primarily to verify the ReadFrom and WriteTo callouts inside Copy and Copyn. |
| |
| func TestCopy(t *testing.T) { |
| rb := new(Buffer); |
| wb := new(Buffer); |
| rb.WriteString("hello, world."); |
| Copy(wb, rb); |
| if wb.String() != "hello, world." { |
| t.Errorf("Copy did not work properly") |
| } |
| } |
| |
| func TestCopyReadFrom(t *testing.T) { |
| rb := new(Buffer); |
| wb := new(bytes.Buffer); // implements ReadFrom. |
| rb.WriteString("hello, world."); |
| Copy(wb, rb); |
| if wb.String() != "hello, world." { |
| t.Errorf("Copy did not work properly") |
| } |
| } |
| |
| func TestCopyWriteTo(t *testing.T) { |
| rb := new(bytes.Buffer); // implements WriteTo. |
| wb := new(Buffer); |
| rb.WriteString("hello, world."); |
| Copy(wb, rb); |
| if wb.String() != "hello, world." { |
| t.Errorf("Copy did not work properly") |
| } |
| } |
| |
| func TestCopyn(t *testing.T) { |
| rb := new(Buffer); |
| wb := new(Buffer); |
| rb.WriteString("hello, world."); |
| Copyn(wb, rb, 5); |
| if wb.String() != "hello" { |
| t.Errorf("Copyn did not work properly") |
| } |
| } |
| |
| func TestCopynReadFrom(t *testing.T) { |
| rb := new(Buffer); |
| wb := new(bytes.Buffer); // implements ReadFrom. |
| rb.WriteString("hello"); |
| Copyn(wb, rb, 5); |
| if wb.String() != "hello" { |
| t.Errorf("Copyn did not work properly") |
| } |
| } |
| |
| func TestCopynWriteTo(t *testing.T) { |
| rb := new(bytes.Buffer); // implements WriteTo. |
| wb := new(Buffer); |
| rb.WriteString("hello, world."); |
| Copyn(wb, rb, 5); |
| if wb.String() != "hello" { |
| t.Errorf("Copyn did not work properly") |
| } |
| } |