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// Copyright 2015 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package interruptfs_test
import (
"bytes"
"os"
"os/exec"
"path"
"testing"
"time"
"github.com/jacobsa/fuse/fuseutil"
"github.com/jacobsa/fuse/samples"
"github.com/jacobsa/fuse/samples/interruptfs"
. "github.com/jacobsa/oglematchers"
. "github.com/jacobsa/ogletest"
)
func TestInterruptFS(t *testing.T) { RunTests(t) }
////////////////////////////////////////////////////////////////////////
// Boilerplate
////////////////////////////////////////////////////////////////////////
type InterruptFSTest struct {
samples.SampleTest
fs *interruptfs.InterruptFS
}
func init() { RegisterTestSuite(&InterruptFSTest{}) }
var _ SetUpInterface = &InterruptFSTest{}
var _ TearDownInterface = &InterruptFSTest{}
func (t *InterruptFSTest) SetUp(ti *TestInfo) {
var err error
// Create the file system.
t.fs = interruptfs.New()
AssertEq(nil, err)
t.Server = fuseutil.NewFileSystemServer(t.fs)
// Mount it.
t.SampleTest.SetUp(ti)
}
////////////////////////////////////////////////////////////////////////
// Test functions
////////////////////////////////////////////////////////////////////////
func (t *InterruptFSTest) StatFoo() {
fi, err := os.Stat(path.Join(t.Dir, "foo"))
AssertEq(nil, err)
ExpectEq("foo", fi.Name())
ExpectEq(0777, fi.Mode())
ExpectFalse(fi.IsDir())
}
func (t *InterruptFSTest) InterruptedDuringRead() {
var err error
t.fs.EnableReadBlocking()
// Start a sub-process that attempts to read the file.
cmd := exec.Command("cat", path.Join(t.Dir, "foo"))
var cmdOutput bytes.Buffer
cmd.Stdout = &cmdOutput
cmd.Stderr = &cmdOutput
err = cmd.Start()
AssertEq(nil, err)
// Wait for the command in the background, writing to a channel when it is
// finished.
cmdErr := make(chan error)
go func() {
cmdErr <- cmd.Wait()
}()
// Wait for the read to make it to the file system.
t.fs.WaitForFirstRead()
// The command should be hanging on the read, and not yet have returned.
select {
case err = <-cmdErr:
AddFailure("Command returned early with error: %v", err)
AbortTest()
case <-time.After(10 * time.Millisecond):
}
// Send SIGINT.
cmd.Process.Signal(os.Interrupt)
// Now the command should return, with an appropriate error.
err = <-cmdErr
ExpectThat(err, Error(HasSubstr("signal")))
ExpectThat(err, Error(HasSubstr("interrupt")))
}
func (t *InterruptFSTest) InterruptedDuringFlush() {
var err error
t.fs.EnableFlushBlocking()
// Start a sub-process that attempts to read the file.
cmd := exec.Command("cat", path.Join(t.Dir, "foo"))
var cmdOutput bytes.Buffer
cmd.Stdout = &cmdOutput
cmd.Stderr = &cmdOutput
err = cmd.Start()
AssertEq(nil, err)
// Wait for the command in the background, writing to a channel when it is
// finished.
cmdErr := make(chan error)
go func() {
cmdErr <- cmd.Wait()
}()
// Wait for the flush to make it to the file system.
t.fs.WaitForFirstFlush()
// The command should be hanging on the flush, and not yet have returned.
select {
case err = <-cmdErr:
AddFailure("Command returned early with error: %v", err)
AbortTest()
case <-time.After(10 * time.Millisecond):
}
// Send SIGINT.
cmd.Process.Signal(os.Interrupt)
// Now the command should return, with an appropriate error.
err = <-cmdErr
ExpectThat(err, Error(HasSubstr("signal")))
ExpectThat(err, Error(HasSubstr("interrupt")))
}
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