mirror of https://github.com/docker/compose.git
79 lines
2.0 KiB
Go
79 lines
2.0 KiB
Go
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/*
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Copyright 2020 Docker Compose CLI 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 utils
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import (
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"bytes"
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"strings"
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"sync"
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"testing"
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"time"
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"github.com/stretchr/testify/require"
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)
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// SafeBuffer is a thread safe version of bytes.Buffer
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type SafeBuffer struct {
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m sync.RWMutex
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b bytes.Buffer
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}
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// Read is a thread safe version of bytes.Buffer::Read
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func (b *SafeBuffer) Read(p []byte) (n int, err error) {
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b.m.RLock()
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defer b.m.RUnlock()
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return b.b.Read(p)
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}
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// Write is a thread safe version of bytes.Buffer::Write
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func (b *SafeBuffer) Write(p []byte) (n int, err error) {
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b.m.Lock()
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defer b.m.Unlock()
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return b.b.Write(p)
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}
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// String is a thread safe version of bytes.Buffer::String
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func (b *SafeBuffer) String() string {
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b.m.RLock()
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defer b.m.RUnlock()
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return b.b.String()
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}
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// Bytes is a thread safe version of bytes.Buffer::Bytes
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func (b *SafeBuffer) Bytes() []byte {
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b.m.RLock()
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defer b.m.RUnlock()
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return b.b.Bytes()
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}
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// RequireEventuallyContains is a thread safe eventual checker for the buffer content
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func (b *SafeBuffer) RequireEventuallyContains(t testing.TB, v string) {
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t.Helper()
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var bufContents strings.Builder
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require.Eventuallyf(t, func() bool {
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b.m.Lock()
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defer b.m.Unlock()
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if _, err := b.b.WriteTo(&bufContents); err != nil {
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require.FailNowf(t, "Failed to copy from buffer",
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"Error: %v", err)
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}
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return strings.Contains(bufContents.String(), v)
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}, 2*time.Second, 20*time.Millisecond,
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"Buffer did not contain %q\n============\n%s\n============",
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v, &bufContents)
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}
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