github.com/scaleoutsean/fusego@v0.0.0-20220224074057-4a6429e46bb8/samples/interruptfs/interrupt_fs_test.go (about)

     1  // Copyright 2015 Google Inc. All Rights Reserved.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package interruptfs_test
    16  
    17  import (
    18  	"bytes"
    19  	"os"
    20  	"os/exec"
    21  	"path"
    22  	"testing"
    23  	"time"
    24  
    25  	"github.com/scaleoutsean/fusego/fuseutil"
    26  	"github.com/scaleoutsean/fusego/samples"
    27  	"github.com/scaleoutsean/fusego/samples/interruptfs"
    28  	. "github.com/jacobsa/oglematchers"
    29  	. "github.com/jacobsa/ogletest"
    30  )
    31  
    32  func TestInterruptFS(t *testing.T) { RunTests(t) }
    33  
    34  ////////////////////////////////////////////////////////////////////////
    35  // Boilerplate
    36  ////////////////////////////////////////////////////////////////////////
    37  
    38  type InterruptFSTest struct {
    39  	samples.SampleTest
    40  	fs *interruptfs.InterruptFS
    41  }
    42  
    43  func init() { RegisterTestSuite(&InterruptFSTest{}) }
    44  
    45  var _ SetUpInterface = &InterruptFSTest{}
    46  var _ TearDownInterface = &InterruptFSTest{}
    47  
    48  func (t *InterruptFSTest) SetUp(ti *TestInfo) {
    49  	var err error
    50  
    51  	// Create the file system.
    52  	t.fs = interruptfs.New()
    53  	AssertEq(nil, err)
    54  
    55  	t.Server = fuseutil.NewFileSystemServer(t.fs)
    56  
    57  	// Mount it.
    58  	t.SampleTest.SetUp(ti)
    59  }
    60  
    61  ////////////////////////////////////////////////////////////////////////
    62  // Test functions
    63  ////////////////////////////////////////////////////////////////////////
    64  
    65  func (t *InterruptFSTest) StatFoo() {
    66  	fi, err := os.Stat(path.Join(t.Dir, "foo"))
    67  	AssertEq(nil, err)
    68  
    69  	ExpectEq("foo", fi.Name())
    70  	ExpectEq(0777, fi.Mode())
    71  	ExpectFalse(fi.IsDir())
    72  }
    73  
    74  func (t *InterruptFSTest) InterruptedDuringRead() {
    75  	var err error
    76  	t.fs.EnableReadBlocking()
    77  
    78  	// Start a sub-process that attempts to read the file.
    79  	cmd := exec.Command("cat", path.Join(t.Dir, "foo"))
    80  
    81  	var cmdOutput bytes.Buffer
    82  	cmd.Stdout = &cmdOutput
    83  	cmd.Stderr = &cmdOutput
    84  
    85  	err = cmd.Start()
    86  	AssertEq(nil, err)
    87  
    88  	// Wait for the command in the background, writing to a channel when it is
    89  	// finished.
    90  	cmdErr := make(chan error)
    91  	go func() {
    92  		cmdErr <- cmd.Wait()
    93  	}()
    94  
    95  	// Wait for the read to make it to the file system.
    96  	t.fs.WaitForFirstRead()
    97  
    98  	// The command should be hanging on the read, and not yet have returned.
    99  	select {
   100  	case err = <-cmdErr:
   101  		AddFailure("Command returned early with error: %v", err)
   102  		AbortTest()
   103  
   104  	case <-time.After(10 * time.Millisecond):
   105  	}
   106  
   107  	// Send SIGINT.
   108  	cmd.Process.Signal(os.Interrupt)
   109  
   110  	// Now the command should return, with an appropriate error.
   111  	err = <-cmdErr
   112  	ExpectThat(err, Error(HasSubstr("signal")))
   113  	ExpectThat(err, Error(HasSubstr("interrupt")))
   114  }
   115  
   116  func (t *InterruptFSTest) InterruptedDuringFlush() {
   117  	var err error
   118  	t.fs.EnableFlushBlocking()
   119  
   120  	// Start a sub-process that attempts to read the file.
   121  	cmd := exec.Command("cat", path.Join(t.Dir, "foo"))
   122  
   123  	var cmdOutput bytes.Buffer
   124  	cmd.Stdout = &cmdOutput
   125  	cmd.Stderr = &cmdOutput
   126  
   127  	err = cmd.Start()
   128  	AssertEq(nil, err)
   129  
   130  	// Wait for the command in the background, writing to a channel when it is
   131  	// finished.
   132  	cmdErr := make(chan error)
   133  	go func() {
   134  		cmdErr <- cmd.Wait()
   135  	}()
   136  
   137  	// Wait for the flush to make it to the file system.
   138  	t.fs.WaitForFirstFlush()
   139  
   140  	// The command should be hanging on the flush, and not yet have returned.
   141  	select {
   142  	case err = <-cmdErr:
   143  		AddFailure("Command returned early with error: %v", err)
   144  		AbortTest()
   145  
   146  	case <-time.After(10 * time.Millisecond):
   147  	}
   148  
   149  	// Send SIGINT.
   150  	cmd.Process.Signal(os.Interrupt)
   151  
   152  	// Now the command should return, with an appropriate error.
   153  	err = <-cmdErr
   154  	ExpectThat(err, Error(HasSubstr("signal")))
   155  	ExpectThat(err, Error(HasSubstr("interrupt")))
   156  }