112 lines
2.9 KiB
Go
112 lines
2.9 KiB
Go
// Copyright 2015 Google Inc. All Rights Reserved.
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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package samples
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import (
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"fmt"
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"io/ioutil"
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"log"
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"strings"
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"time"
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"github.com/googlecloudplatform/gcsfuse/timeutil"
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"github.com/jacobsa/fuse"
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"golang.org/x/net/context"
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)
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// A struct that implements common behavior needed by tests in the samples/
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// directory. Use it as an anonymous member of your test fixture, calling its
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// Initialize method from your SetUp method and its Destroy method from your
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// TearDown method.
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type SampleTest struct {
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// A context object that can be used for long-running operations.
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Ctx context.Context
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// A clock with a fixed initial time. The test's set up method may use this
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// to wire the file system with a clock, if desired.
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Clock timeutil.SimulatedClock
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// The directory at which the file system is mounted.
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Dir string
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mfs *fuse.MountedFileSystem
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}
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// Mount the supplied file system and initialize the exported fields of the
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// struct. Panics on error.
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func (t *SampleTest) Initialize(fs fuse.FileSystem, config *fuse.MountConfig) {
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err := t.initialize(fs, config)
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if err != nil {
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panic(err)
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}
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}
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// Like Initialize, but doens't panic.
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func (t *SampleTest) initialize(
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fs fuse.FileSystem,
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config *fuse.MountConfig) (err error) {
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// Initialize the context.
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t.Ctx = context.Background()
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// Initialize the clock.
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t.Clock.SetTime(time.Date(2012, 8, 15, 22, 56, 0, 0, time.Local))
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// Set up a temporary directory.
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t.Dir, err = ioutil.TempDir("", "sample_test")
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if err != nil {
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err = fmt.Errorf("TempDir: %v", err)
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return
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}
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// Mount the file system.
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t.mfs, err = fuse.Mount(t.Dir, fs, config)
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if err != nil {
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err = fmt.Errorf("Mount: %v", err)
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return
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}
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return
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}
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// Unmount the file system and clean up. Panics on error.
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func (t *SampleTest) Destroy() {
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// Was the file system mounted?
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if t.mfs == nil {
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return
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}
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// Unmount the file system. Try again on "resource busy" errors.
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delay := 10 * time.Millisecond
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for {
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err := t.mfs.Unmount()
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if err == nil {
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break
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}
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if strings.Contains(err.Error(), "resource busy") {
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log.Println("Resource busy error while unmounting; trying again")
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time.Sleep(delay)
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delay = time.Duration(1.3 * float64(delay))
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continue
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}
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panic("MountedFileSystem.Unmount: " + err.Error())
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}
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if err := t.mfs.Join(context.Background()); err != nil {
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panic("MountedFileSystem.Join: " + err.Error())
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}
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}
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