116 lines
2.7 KiB
Go
116 lines
2.7 KiB
Go
/*
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Copyright The containerd Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package ioutil
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import (
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"bytes"
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"testing"
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"github.com/stretchr/testify/assert"
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)
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type writeCloser struct {
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buf bytes.Buffer
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closed bool
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}
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func (wc *writeCloser) Write(p []byte) (int, error) {
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return wc.buf.Write(p)
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}
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func (wc *writeCloser) Close() error {
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wc.closed = true
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return nil
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}
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func TestEmptyWriterGroup(t *testing.T) {
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wg := NewWriterGroup()
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_, err := wg.Write([]byte("test"))
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assert.Error(t, err)
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}
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func TestClosedWriterGroup(t *testing.T) {
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wg := NewWriterGroup()
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wc := &writeCloser{}
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key, data := "test key", "test data"
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wg.Add(key, wc)
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n, err := wg.Write([]byte(data))
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assert.Equal(t, len(data), n)
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assert.Equal(t, data, wc.buf.String())
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assert.NoError(t, err)
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wg.Close()
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assert.True(t, wc.closed)
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newWC := &writeCloser{}
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wg.Add(key, newWC)
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assert.True(t, newWC.closed)
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_, err = wg.Write([]byte(data))
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assert.Error(t, err)
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}
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func TestAddGetRemoveWriter(t *testing.T) {
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wg := NewWriterGroup()
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wc1, wc2 := &writeCloser{}, &writeCloser{}
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key1, key2 := "test key 1", "test key 2"
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wg.Add(key1, wc1)
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_, err := wg.Write([]byte("test data 1"))
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assert.NoError(t, err)
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assert.Equal(t, "test data 1", wc1.buf.String())
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wg.Add(key2, wc2)
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_, err = wg.Write([]byte("test data 2"))
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assert.NoError(t, err)
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assert.Equal(t, "test data 1test data 2", wc1.buf.String())
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assert.Equal(t, "test data 2", wc2.buf.String())
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assert.Equal(t, wc1, wg.Get(key1))
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wg.Remove(key1)
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_, err = wg.Write([]byte("test data 3"))
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assert.NoError(t, err)
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assert.Equal(t, "test data 1test data 2", wc1.buf.String())
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assert.Equal(t, "test data 2test data 3", wc2.buf.String())
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assert.Equal(t, nil, wg.Get(key1))
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wg.Close()
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}
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func TestReplaceWriter(t *testing.T) {
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wg := NewWriterGroup()
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wc1, wc2 := &writeCloser{}, &writeCloser{}
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key := "test-key"
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wg.Add(key, wc1)
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_, err := wg.Write([]byte("test data 1"))
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assert.NoError(t, err)
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assert.Equal(t, "test data 1", wc1.buf.String())
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wg.Add(key, wc2)
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_, err = wg.Write([]byte("test data 2"))
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assert.NoError(t, err)
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assert.Equal(t, "test data 1", wc1.buf.String())
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assert.Equal(t, "test data 2", wc2.buf.String())
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wg.Close()
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}
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