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// 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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"context"
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"fmt"
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"io"
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"io/ioutil"
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"log"
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"os"
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"time"
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"github.com/jacobsa/fuse"
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"github.com/jacobsa/ogletest"
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"github.com/jacobsa/timeutil"
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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 embedded field in your test fixture, calling its
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// SetUp method from your SetUp method after setting the Server field.
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type SampleTest struct {
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// The server under test and the configuration with which it should be
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// mounted. These must be set by the user of this type before calling SetUp;
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// all the other fields below are set by SetUp itself.
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Server fuse.Server
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MountConfig fuse.MountConfig
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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 server 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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// Anothing non-nil in this slice will be closed by TearDown. The test will
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// fail if closing fails.
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ToClose []io.Closer
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mfs *fuse.MountedFileSystem
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}
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// Mount t.Server and initialize the other exported fields of the struct.
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// Panics on error.
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//
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// REQUIRES: t.Server has been set.
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func (t *SampleTest) SetUp(ti *ogletest.TestInfo) {
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cfg := t.MountConfig
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if *fDebug {
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cfg.DebugLogger = log.New(os.Stderr, "fuse: ", 0)
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}
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err := t.initialize(ti.Ctx, t.Server, &cfg)
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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 SetUp, but doesn't panic.
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func (t *SampleTest) initialize(
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ctx context.Context,
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server fuse.Server,
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config *fuse.MountConfig) error {
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// Initialize the context used by the test.
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t.Ctx = ctx
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// Make the server share that context, if the test hasn't already set some
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// other one.
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if config.OpContext == nil {
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config.OpContext = ctx
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}
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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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var err error
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t.Dir, err = ioutil.TempDir("", "sample_test")
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if err != nil {
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return fmt.Errorf("TempDir: %v", err)
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}
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// Mount the file system.
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t.mfs, err = fuse.Mount(t.Dir, server, config)
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if err != nil {
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return fmt.Errorf("Mount: %v", err)
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}
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return nil
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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) TearDown() {
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err := t.destroy()
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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 TearDown, but doesn't panic.
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func (t *SampleTest) destroy() (err error) {
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// Close what is necessary.
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for _, c := range t.ToClose {
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if c == nil {
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continue
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}
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ogletest.ExpectEq(nil, c.Close())
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}
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// Was the file system mounted?
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if t.mfs == nil {
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return nil
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}
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// Unmount the file system.
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if err := unmount(t.Dir); err != nil {
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return fmt.Errorf("unmount: %v", err)
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}
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// Unlink the mount point.
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if err := os.Remove(t.Dir); err != nil {
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return fmt.Errorf("Unlinking mount point: %v", err)
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}
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// Join the file system.
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if err := t.mfs.Join(t.Ctx); err != nil {
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return fmt.Errorf("mfs.Join: %v", err)
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}
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return nil
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}
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