--- /dev/null
+// Copyright 2010 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !plan9,!solaris
+
+package fsnotify
+
+import (
+ "io/ioutil"
+ "os"
+ "os/exec"
+ "path"
+ "path/filepath"
+ "runtime"
+ "sync/atomic"
+ "testing"
+ "time"
+)
+
+// An atomic counter
+type counter struct {
+ val int32
+}
+
+func (c *counter) increment() {
+ atomic.AddInt32(&c.val, 1)
+}
+
+func (c *counter) value() int32 {
+ return atomic.LoadInt32(&c.val)
+}
+
+func (c *counter) reset() {
+ atomic.StoreInt32(&c.val, 0)
+}
+
+// tempMkdir makes a temporary directory
+func tempMkdir(t *testing.T) string {
+ dir, err := ioutil.TempDir("", "fsnotify")
+ if err != nil {
+ t.Fatalf("failed to create test directory: %s", err)
+ }
+ return dir
+}
+
+// tempMkFile makes a temporary file.
+func tempMkFile(t *testing.T, dir string) string {
+ f, err := ioutil.TempFile(dir, "fsnotify")
+ if err != nil {
+ t.Fatalf("failed to create test file: %v", err)
+ }
+ defer f.Close()
+ return f.Name()
+}
+
+// newWatcher initializes an fsnotify Watcher instance.
+func newWatcher(t *testing.T) *Watcher {
+ watcher, err := NewWatcher()
+ if err != nil {
+ t.Fatalf("NewWatcher() failed: %s", err)
+ }
+ return watcher
+}
+
+// addWatch adds a watch for a directory
+func addWatch(t *testing.T, watcher *Watcher, dir string) {
+ if err := watcher.Add(dir); err != nil {
+ t.Fatalf("watcher.Add(%q) failed: %s", dir, err)
+ }
+}
+
+func TestFsnotifyMultipleOperations(t *testing.T) {
+ watcher := newWatcher(t)
+
+ // Receive errors on the error channel on a separate goroutine
+ go func() {
+ for err := range watcher.Errors {
+ t.Fatalf("error received: %s", err)
+ }
+ }()
+
+ // Create directory to watch
+ testDir := tempMkdir(t)
+ defer os.RemoveAll(testDir)
+
+ // Create directory that's not watched
+ testDirToMoveFiles := tempMkdir(t)
+ defer os.RemoveAll(testDirToMoveFiles)
+
+ testFile := filepath.Join(testDir, "TestFsnotifySeq.testfile")
+ testFileRenamed := filepath.Join(testDirToMoveFiles, "TestFsnotifySeqRename.testfile")
+
+ addWatch(t, watcher, testDir)
+
+ // Receive events on the event channel on a separate goroutine
+ eventstream := watcher.Events
+ var createReceived, modifyReceived, deleteReceived, renameReceived counter
+ done := make(chan bool)
+ go func() {
+ for event := range eventstream {
+ // Only count relevant events
+ if event.Name == filepath.Clean(testDir) || event.Name == filepath.Clean(testFile) {
+ t.Logf("event received: %s", event)
+ if event.Op&Remove == Remove {
+ deleteReceived.increment()
+ }
+ if event.Op&Write == Write {
+ modifyReceived.increment()
+ }
+ if event.Op&Create == Create {
+ createReceived.increment()
+ }
+ if event.Op&Rename == Rename {
+ renameReceived.increment()
+ }
+ } else {
+ t.Logf("unexpected event received: %s", event)
+ }
+ }
+ done <- true
+ }()
+
+ // Create a file
+ // This should add at least one event to the fsnotify event queue
+ var f *os.File
+ f, err := os.OpenFile(testFile, os.O_WRONLY|os.O_CREATE, 0666)
+ if err != nil {
+ t.Fatalf("creating test file failed: %s", err)
+ }
+ f.Sync()
+
+ time.Sleep(time.Millisecond)
+ f.WriteString("data")
+ f.Sync()
+ f.Close()
+
+ time.Sleep(50 * time.Millisecond) // give system time to sync write change before delete
+
+ if err := testRename(testFile, testFileRenamed); err != nil {
+ t.Fatalf("rename failed: %s", err)
+ }
+
+ // Modify the file outside of the watched dir
+ f, err = os.Open(testFileRenamed)
+ if err != nil {
+ t.Fatalf("open test renamed file failed: %s", err)
+ }
+ f.WriteString("data")
+ f.Sync()
+ f.Close()
+
+ time.Sleep(50 * time.Millisecond) // give system time to sync write change before delete
+
+ // Recreate the file that was moved
+ f, err = os.OpenFile(testFile, os.O_WRONLY|os.O_CREATE, 0666)
+ if err != nil {
+ t.Fatalf("creating test file failed: %s", err)
+ }
+ f.Close()
+ time.Sleep(50 * time.Millisecond) // give system time to sync write change before delete
+
+ // We expect this event to be received almost immediately, but let's wait 500 ms to be sure
+ time.Sleep(500 * time.Millisecond)
+ cReceived := createReceived.value()
+ if cReceived != 2 {
+ t.Fatalf("incorrect number of create events received after 500 ms (%d vs %d)", cReceived, 2)
+ }
+ mReceived := modifyReceived.value()
+ if mReceived != 1 {
+ t.Fatalf("incorrect number of modify events received after 500 ms (%d vs %d)", mReceived, 1)
+ }
+ dReceived := deleteReceived.value()
+ rReceived := renameReceived.value()
+ if dReceived+rReceived != 1 {
+ t.Fatalf("incorrect number of rename+delete events received after 500 ms (%d vs %d)", rReceived+dReceived, 1)
+ }
+
+ // Try closing the fsnotify instance
+ t.Log("calling Close()")
+ watcher.Close()
+ t.Log("waiting for the event channel to become closed...")
+ select {
+ case <-done:
+ t.Log("event channel closed")
+ case <-time.After(2 * time.Second):
+ t.Fatal("event stream was not closed after 2 seconds")
+ }
+}
+
+func TestFsnotifyMultipleCreates(t *testing.T) {
+ watcher := newWatcher(t)
+
+ // Receive errors on the error channel on a separate goroutine
+ go func() {
+ for err := range watcher.Errors {
+ t.Fatalf("error received: %s", err)
+ }
+ }()
+
+ // Create directory to watch
+ testDir := tempMkdir(t)
+ defer os.RemoveAll(testDir)
+
+ testFile := filepath.Join(testDir, "TestFsnotifySeq.testfile")
+
+ addWatch(t, watcher, testDir)
+
+ // Receive events on the event channel on a separate goroutine
+ eventstream := watcher.Events
+ var createReceived, modifyReceived, deleteReceived counter
+ done := make(chan bool)
+ go func() {
+ for event := range eventstream {
+ // Only count relevant events
+ if event.Name == filepath.Clean(testDir) || event.Name == filepath.Clean(testFile) {
+ t.Logf("event received: %s", event)
+ if event.Op&Remove == Remove {
+ deleteReceived.increment()
+ }
+ if event.Op&Create == Create {
+ createReceived.increment()
+ }
+ if event.Op&Write == Write {
+ modifyReceived.increment()
+ }
+ } else {
+ t.Logf("unexpected event received: %s", event)
+ }
+ }
+ done <- true
+ }()
+
+ // Create a file
+ // This should add at least one event to the fsnotify event queue
+ var f *os.File
+ f, err := os.OpenFile(testFile, os.O_WRONLY|os.O_CREATE, 0666)
+ if err != nil {
+ t.Fatalf("creating test file failed: %s", err)
+ }
+ f.Sync()
+
+ time.Sleep(time.Millisecond)
+ f.WriteString("data")
+ f.Sync()
+ f.Close()
+
+ time.Sleep(50 * time.Millisecond) // give system time to sync write change before delete
+
+ os.Remove(testFile)
+
+ time.Sleep(50 * time.Millisecond) // give system time to sync write change before delete
+
+ // Recreate the file
+ f, err = os.OpenFile(testFile, os.O_WRONLY|os.O_CREATE, 0666)
+ if err != nil {
+ t.Fatalf("creating test file failed: %s", err)
+ }
+ f.Close()
+ time.Sleep(50 * time.Millisecond) // give system time to sync write change before delete
+
+ // Modify
+ f, err = os.OpenFile(testFile, os.O_WRONLY, 0666)
+ if err != nil {
+ t.Fatalf("creating test file failed: %s", err)
+ }
+ f.Sync()
+
+ time.Sleep(time.Millisecond)
+ f.WriteString("data")
+ f.Sync()
+ f.Close()
+
+ time.Sleep(50 * time.Millisecond) // give system time to sync write change before delete
+
+ // Modify
+ f, err = os.OpenFile(testFile, os.O_WRONLY, 0666)
+ if err != nil {
+ t.Fatalf("creating test file failed: %s", err)
+ }
+ f.Sync()
+
+ time.Sleep(time.Millisecond)
+ f.WriteString("data")
+ f.Sync()
+ f.Close()
+
+ time.Sleep(50 * time.Millisecond) // give system time to sync write change before delete
+
+ // We expect this event to be received almost immediately, but let's wait 500 ms to be sure
+ time.Sleep(500 * time.Millisecond)
+ cReceived := createReceived.value()
+ if cReceived != 2 {
+ t.Fatalf("incorrect number of create events received after 500 ms (%d vs %d)", cReceived, 2)
+ }
+ mReceived := modifyReceived.value()
+ if mReceived < 3 {
+ t.Fatalf("incorrect number of modify events received after 500 ms (%d vs atleast %d)", mReceived, 3)
+ }
+ dReceived := deleteReceived.value()
+ if dReceived != 1 {
+ t.Fatalf("incorrect number of rename+delete events received after 500 ms (%d vs %d)", dReceived, 1)
+ }
+
+ // Try closing the fsnotify instance
+ t.Log("calling Close()")
+ watcher.Close()
+ t.Log("waiting for the event channel to become closed...")
+ select {
+ case <-done:
+ t.Log("event channel closed")
+ case <-time.After(2 * time.Second):
+ t.Fatal("event stream was not closed after 2 seconds")
+ }
+}
+
+func TestFsnotifyDirOnly(t *testing.T) {
+ watcher := newWatcher(t)
+
+ // Create directory to watch
+ testDir := tempMkdir(t)
+ defer os.RemoveAll(testDir)
+
+ // Create a file before watching directory
+ // This should NOT add any events to the fsnotify event queue
+ testFileAlreadyExists := filepath.Join(testDir, "TestFsnotifyEventsExisting.testfile")
+ {
+ var f *os.File
+ f, err := os.OpenFile(testFileAlreadyExists, os.O_WRONLY|os.O_CREATE, 0666)
+ if err != nil {
+ t.Fatalf("creating test file failed: %s", err)
+ }
+ f.Sync()
+ f.Close()
+ }
+
+ addWatch(t, watcher, testDir)
+
+ // Receive errors on the error channel on a separate goroutine
+ go func() {
+ for err := range watcher.Errors {
+ t.Fatalf("error received: %s", err)
+ }
+ }()
+
+ testFile := filepath.Join(testDir, "TestFsnotifyDirOnly.testfile")
+
+ // Receive events on the event channel on a separate goroutine
+ eventstream := watcher.Events
+ var createReceived, modifyReceived, deleteReceived counter
+ done := make(chan bool)
+ go func() {
+ for event := range eventstream {
+ // Only count relevant events
+ if event.Name == filepath.Clean(testDir) || event.Name == filepath.Clean(testFile) || event.Name == filepath.Clean(testFileAlreadyExists) {
+ t.Logf("event received: %s", event)
+ if event.Op&Remove == Remove {
+ deleteReceived.increment()
+ }
+ if event.Op&Write == Write {
+ modifyReceived.increment()
+ }
+ if event.Op&Create == Create {
+ createReceived.increment()
+ }
+ } else {
+ t.Logf("unexpected event received: %s", event)
+ }
+ }
+ done <- true
+ }()
+
+ // Create a file
+ // This should add at least one event to the fsnotify event queue
+ var f *os.File
+ f, err := os.OpenFile(testFile, os.O_WRONLY|os.O_CREATE, 0666)
+ if err != nil {
+ t.Fatalf("creating test file failed: %s", err)
+ }
+ f.Sync()
+
+ time.Sleep(time.Millisecond)
+ f.WriteString("data")
+ f.Sync()
+ f.Close()
+
+ time.Sleep(50 * time.Millisecond) // give system time to sync write change before delete
+
+ os.Remove(testFile)
+ os.Remove(testFileAlreadyExists)
+
+ // We expect this event to be received almost immediately, but let's wait 500 ms to be sure
+ time.Sleep(500 * time.Millisecond)
+ cReceived := createReceived.value()
+ if cReceived != 1 {
+ t.Fatalf("incorrect number of create events received after 500 ms (%d vs %d)", cReceived, 1)
+ }
+ mReceived := modifyReceived.value()
+ if mReceived != 1 {
+ t.Fatalf("incorrect number of modify events received after 500 ms (%d vs %d)", mReceived, 1)
+ }
+ dReceived := deleteReceived.value()
+ if dReceived != 2 {
+ t.Fatalf("incorrect number of delete events received after 500 ms (%d vs %d)", dReceived, 2)
+ }
+
+ // Try closing the fsnotify instance
+ t.Log("calling Close()")
+ watcher.Close()
+ t.Log("waiting for the event channel to become closed...")
+ select {
+ case <-done:
+ t.Log("event channel closed")
+ case <-time.After(2 * time.Second):
+ t.Fatal("event stream was not closed after 2 seconds")
+ }
+}
+
+func TestFsnotifyDeleteWatchedDir(t *testing.T) {
+ watcher := newWatcher(t)
+ defer watcher.Close()
+
+ // Create directory to watch
+ testDir := tempMkdir(t)
+ defer os.RemoveAll(testDir)
+
+ // Create a file before watching directory
+ testFileAlreadyExists := filepath.Join(testDir, "TestFsnotifyEventsExisting.testfile")
+ {
+ var f *os.File
+ f, err := os.OpenFile(testFileAlreadyExists, os.O_WRONLY|os.O_CREATE, 0666)
+ if err != nil {
+ t.Fatalf("creating test file failed: %s", err)
+ }
+ f.Sync()
+ f.Close()
+ }
+
+ addWatch(t, watcher, testDir)
+
+ // Add a watch for testFile
+ addWatch(t, watcher, testFileAlreadyExists)
+
+ // Receive errors on the error channel on a separate goroutine
+ go func() {
+ for err := range watcher.Errors {
+ t.Fatalf("error received: %s", err)
+ }
+ }()
+
+ // Receive events on the event channel on a separate goroutine
+ eventstream := watcher.Events
+ var deleteReceived counter
+ go func() {
+ for event := range eventstream {
+ // Only count relevant events
+ if event.Name == filepath.Clean(testDir) || event.Name == filepath.Clean(testFileAlreadyExists) {
+ t.Logf("event received: %s", event)
+ if event.Op&Remove == Remove {
+ deleteReceived.increment()
+ }
+ } else {
+ t.Logf("unexpected event received: %s", event)
+ }
+ }
+ }()
+
+ os.RemoveAll(testDir)
+
+ // We expect this event to be received almost immediately, but let's wait 500 ms to be sure
+ time.Sleep(500 * time.Millisecond)
+ dReceived := deleteReceived.value()
+ if dReceived < 2 {
+ t.Fatalf("did not receive at least %d delete events, received %d after 500 ms", 2, dReceived)
+ }
+}
+
+func TestFsnotifySubDir(t *testing.T) {
+ watcher := newWatcher(t)
+
+ // Create directory to watch
+ testDir := tempMkdir(t)
+ defer os.RemoveAll(testDir)
+
+ testFile1 := filepath.Join(testDir, "TestFsnotifyFile1.testfile")
+ testSubDir := filepath.Join(testDir, "sub")
+ testSubDirFile := filepath.Join(testDir, "sub/TestFsnotifyFile1.testfile")
+
+ // Receive errors on the error channel on a separate goroutine
+ go func() {
+ for err := range watcher.Errors {
+ t.Fatalf("error received: %s", err)
+ }
+ }()
+
+ // Receive events on the event channel on a separate goroutine
+ eventstream := watcher.Events
+ var createReceived, deleteReceived counter
+ done := make(chan bool)
+ go func() {
+ for event := range eventstream {
+ // Only count relevant events
+ if event.Name == filepath.Clean(testDir) || event.Name == filepath.Clean(testSubDir) || event.Name == filepath.Clean(testFile1) {
+ t.Logf("event received: %s", event)
+ if event.Op&Create == Create {
+ createReceived.increment()
+ }
+ if event.Op&Remove == Remove {
+ deleteReceived.increment()
+ }
+ } else {
+ t.Logf("unexpected event received: %s", event)
+ }
+ }
+ done <- true
+ }()
+
+ addWatch(t, watcher, testDir)
+
+ // Create sub-directory
+ if err := os.Mkdir(testSubDir, 0777); err != nil {
+ t.Fatalf("failed to create test sub-directory: %s", err)
+ }
+
+ // Create a file
+ var f *os.File
+ f, err := os.OpenFile(testFile1, os.O_WRONLY|os.O_CREATE, 0666)
+ if err != nil {
+ t.Fatalf("creating test file failed: %s", err)
+ }
+ f.Sync()
+ f.Close()
+
+ // Create a file (Should not see this! we are not watching subdir)
+ var fs *os.File
+ fs, err = os.OpenFile(testSubDirFile, os.O_WRONLY|os.O_CREATE, 0666)
+ if err != nil {
+ t.Fatalf("creating test file failed: %s", err)
+ }
+ fs.Sync()
+ fs.Close()
+
+ time.Sleep(200 * time.Millisecond)
+
+ // Make sure receive deletes for both file and sub-directory
+ os.RemoveAll(testSubDir)
+ os.Remove(testFile1)
+
+ // We expect this event to be received almost immediately, but let's wait 500 ms to be sure
+ time.Sleep(500 * time.Millisecond)
+ cReceived := createReceived.value()
+ if cReceived != 2 {
+ t.Fatalf("incorrect number of create events received after 500 ms (%d vs %d)", cReceived, 2)
+ }
+ dReceived := deleteReceived.value()
+ if dReceived != 2 {
+ t.Fatalf("incorrect number of delete events received after 500 ms (%d vs %d)", dReceived, 2)
+ }
+
+ // Try closing the fsnotify instance
+ t.Log("calling Close()")
+ watcher.Close()
+ t.Log("waiting for the event channel to become closed...")
+ select {
+ case <-done:
+ t.Log("event channel closed")
+ case <-time.After(2 * time.Second):
+ t.Fatal("event stream was not closed after 2 seconds")
+ }
+}
+
+func TestFsnotifyRename(t *testing.T) {
+ watcher := newWatcher(t)
+
+ // Create directory to watch
+ testDir := tempMkdir(t)
+ defer os.RemoveAll(testDir)
+
+ addWatch(t, watcher, testDir)
+
+ // Receive errors on the error channel on a separate goroutine
+ go func() {
+ for err := range watcher.Errors {
+ t.Fatalf("error received: %s", err)
+ }
+ }()
+
+ testFile := filepath.Join(testDir, "TestFsnotifyEvents.testfile")
+ testFileRenamed := filepath.Join(testDir, "TestFsnotifyEvents.testfileRenamed")
+
+ // Receive events on the event channel on a separate goroutine
+ eventstream := watcher.Events
+ var renameReceived counter
+ done := make(chan bool)
+ go func() {
+ for event := range eventstream {
+ // Only count relevant events
+ if event.Name == filepath.Clean(testDir) || event.Name == filepath.Clean(testFile) || event.Name == filepath.Clean(testFileRenamed) {
+ if event.Op&Rename == Rename {
+ renameReceived.increment()
+ }
+ t.Logf("event received: %s", event)
+ } else {
+ t.Logf("unexpected event received: %s", event)
+ }
+ }
+ done <- true
+ }()
+
+ // Create a file
+ // This should add at least one event to the fsnotify event queue
+ var f *os.File
+ f, err := os.OpenFile(testFile, os.O_WRONLY|os.O_CREATE, 0666)
+ if err != nil {
+ t.Fatalf("creating test file failed: %s", err)
+ }
+ f.Sync()
+
+ f.WriteString("data")
+ f.Sync()
+ f.Close()
+
+ // Add a watch for testFile
+ addWatch(t, watcher, testFile)
+
+ if err := testRename(testFile, testFileRenamed); err != nil {
+ t.Fatalf("rename failed: %s", err)
+ }
+
+ // We expect this event to be received almost immediately, but let's wait 500 ms to be sure
+ time.Sleep(500 * time.Millisecond)
+ if renameReceived.value() == 0 {
+ t.Fatal("fsnotify rename events have not been received after 500 ms")
+ }
+
+ // Try closing the fsnotify instance
+ t.Log("calling Close()")
+ watcher.Close()
+ t.Log("waiting for the event channel to become closed...")
+ select {
+ case <-done:
+ t.Log("event channel closed")
+ case <-time.After(2 * time.Second):
+ t.Fatal("event stream was not closed after 2 seconds")
+ }
+
+ os.Remove(testFileRenamed)
+}
+
+func TestFsnotifyRenameToCreate(t *testing.T) {
+ watcher := newWatcher(t)
+
+ // Create directory to watch
+ testDir := tempMkdir(t)
+ defer os.RemoveAll(testDir)
+
+ // Create directory to get file
+ testDirFrom := tempMkdir(t)
+ defer os.RemoveAll(testDirFrom)
+
+ addWatch(t, watcher, testDir)
+
+ // Receive errors on the error channel on a separate goroutine
+ go func() {
+ for err := range watcher.Errors {
+ t.Fatalf("error received: %s", err)
+ }
+ }()
+
+ testFile := filepath.Join(testDirFrom, "TestFsnotifyEvents.testfile")
+ testFileRenamed := filepath.Join(testDir, "TestFsnotifyEvents.testfileRenamed")
+
+ // Receive events on the event channel on a separate goroutine
+ eventstream := watcher.Events
+ var createReceived counter
+ done := make(chan bool)
+ go func() {
+ for event := range eventstream {
+ // Only count relevant events
+ if event.Name == filepath.Clean(testDir) || event.Name == filepath.Clean(testFile) || event.Name == filepath.Clean(testFileRenamed) {
+ if event.Op&Create == Create {
+ createReceived.increment()
+ }
+ t.Logf("event received: %s", event)
+ } else {
+ t.Logf("unexpected event received: %s", event)
+ }
+ }
+ done <- true
+ }()
+
+ // Create a file
+ // This should add at least one event to the fsnotify event queue
+ var f *os.File
+ f, err := os.OpenFile(testFile, os.O_WRONLY|os.O_CREATE, 0666)
+ if err != nil {
+ t.Fatalf("creating test file failed: %s", err)
+ }
+ f.Sync()
+ f.Close()
+
+ if err := testRename(testFile, testFileRenamed); err != nil {
+ t.Fatalf("rename failed: %s", err)
+ }
+
+ // We expect this event to be received almost immediately, but let's wait 500 ms to be sure
+ time.Sleep(500 * time.Millisecond)
+ if createReceived.value() == 0 {
+ t.Fatal("fsnotify create events have not been received after 500 ms")
+ }
+
+ // Try closing the fsnotify instance
+ t.Log("calling Close()")
+ watcher.Close()
+ t.Log("waiting for the event channel to become closed...")
+ select {
+ case <-done:
+ t.Log("event channel closed")
+ case <-time.After(2 * time.Second):
+ t.Fatal("event stream was not closed after 2 seconds")
+ }
+
+ os.Remove(testFileRenamed)
+}
+
+func TestFsnotifyRenameToOverwrite(t *testing.T) {
+ switch runtime.GOOS {
+ case "plan9", "windows":
+ t.Skipf("skipping test on %q (os.Rename over existing file does not create event).", runtime.GOOS)
+ }
+
+ watcher := newWatcher(t)
+
+ // Create directory to watch
+ testDir := tempMkdir(t)
+ defer os.RemoveAll(testDir)
+
+ // Create directory to get file
+ testDirFrom := tempMkdir(t)
+ defer os.RemoveAll(testDirFrom)
+
+ testFile := filepath.Join(testDirFrom, "TestFsnotifyEvents.testfile")
+ testFileRenamed := filepath.Join(testDir, "TestFsnotifyEvents.testfileRenamed")
+
+ // Create a file
+ var fr *os.File
+ fr, err := os.OpenFile(testFileRenamed, os.O_WRONLY|os.O_CREATE, 0666)
+ if err != nil {
+ t.Fatalf("creating test file failed: %s", err)
+ }
+ fr.Sync()
+ fr.Close()
+
+ addWatch(t, watcher, testDir)
+
+ // Receive errors on the error channel on a separate goroutine
+ go func() {
+ for err := range watcher.Errors {
+ t.Fatalf("error received: %s", err)
+ }
+ }()
+
+ // Receive events on the event channel on a separate goroutine
+ eventstream := watcher.Events
+ var eventReceived counter
+ done := make(chan bool)
+ go func() {
+ for event := range eventstream {
+ // Only count relevant events
+ if event.Name == filepath.Clean(testFileRenamed) {
+ eventReceived.increment()
+ t.Logf("event received: %s", event)
+ } else {
+ t.Logf("unexpected event received: %s", event)
+ }
+ }
+ done <- true
+ }()
+
+ // Create a file
+ // This should add at least one event to the fsnotify event queue
+ var f *os.File
+ f, err = os.OpenFile(testFile, os.O_WRONLY|os.O_CREATE, 0666)
+ if err != nil {
+ t.Fatalf("creating test file failed: %s", err)
+ }
+ f.Sync()
+ f.Close()
+
+ if err := testRename(testFile, testFileRenamed); err != nil {
+ t.Fatalf("rename failed: %s", err)
+ }
+
+ // We expect this event to be received almost immediately, but let's wait 500 ms to be sure
+ time.Sleep(500 * time.Millisecond)
+ if eventReceived.value() == 0 {
+ t.Fatal("fsnotify events have not been received after 500 ms")
+ }
+
+ // Try closing the fsnotify instance
+ t.Log("calling Close()")
+ watcher.Close()
+ t.Log("waiting for the event channel to become closed...")
+ select {
+ case <-done:
+ t.Log("event channel closed")
+ case <-time.After(2 * time.Second):
+ t.Fatal("event stream was not closed after 2 seconds")
+ }
+
+ os.Remove(testFileRenamed)
+}
+
+func TestRemovalOfWatch(t *testing.T) {
+ // Create directory to watch
+ testDir := tempMkdir(t)
+ defer os.RemoveAll(testDir)
+
+ // Create a file before watching directory
+ testFileAlreadyExists := filepath.Join(testDir, "TestFsnotifyEventsExisting.testfile")
+ {
+ var f *os.File
+ f, err := os.OpenFile(testFileAlreadyExists, os.O_WRONLY|os.O_CREATE, 0666)
+ if err != nil {
+ t.Fatalf("creating test file failed: %s", err)
+ }
+ f.Sync()
+ f.Close()
+ }
+
+ watcher := newWatcher(t)
+ defer watcher.Close()
+
+ addWatch(t, watcher, testDir)
+ if err := watcher.Remove(testDir); err != nil {
+ t.Fatalf("Could not remove the watch: %v\n", err)
+ }
+
+ go func() {
+ select {
+ case ev := <-watcher.Events:
+ t.Fatalf("We received event: %v\n", ev)
+ case <-time.After(500 * time.Millisecond):
+ t.Log("No event received, as expected.")
+ }
+ }()
+
+ time.Sleep(200 * time.Millisecond)
+ // Modify the file outside of the watched dir
+ f, err := os.Open(testFileAlreadyExists)
+ if err != nil {
+ t.Fatalf("Open test file failed: %s", err)
+ }
+ f.WriteString("data")
+ f.Sync()
+ f.Close()
+ if err := os.Chmod(testFileAlreadyExists, 0700); err != nil {
+ t.Fatalf("chmod failed: %s", err)
+ }
+ time.Sleep(400 * time.Millisecond)
+}
+
+func TestFsnotifyAttrib(t *testing.T) {
+ if runtime.GOOS == "windows" {
+ t.Skip("attributes don't work on Windows.")
+ }
+
+ watcher := newWatcher(t)
+
+ // Create directory to watch
+ testDir := tempMkdir(t)
+ defer os.RemoveAll(testDir)
+
+ // Receive errors on the error channel on a separate goroutine
+ go func() {
+ for err := range watcher.Errors {
+ t.Fatalf("error received: %s", err)
+ }
+ }()
+
+ testFile := filepath.Join(testDir, "TestFsnotifyAttrib.testfile")
+
+ // Receive events on the event channel on a separate goroutine
+ eventstream := watcher.Events
+ // The modifyReceived counter counts IsModify events that are not IsAttrib,
+ // and the attribReceived counts IsAttrib events (which are also IsModify as
+ // a consequence).
+ var modifyReceived counter
+ var attribReceived counter
+ done := make(chan bool)
+ go func() {
+ for event := range eventstream {
+ // Only count relevant events
+ if event.Name == filepath.Clean(testDir) || event.Name == filepath.Clean(testFile) {
+ if event.Op&Write == Write {
+ modifyReceived.increment()
+ }
+ if event.Op&Chmod == Chmod {
+ attribReceived.increment()
+ }
+ t.Logf("event received: %s", event)
+ } else {
+ t.Logf("unexpected event received: %s", event)
+ }
+ }
+ done <- true
+ }()
+
+ // Create a file
+ // This should add at least one event to the fsnotify event queue
+ var f *os.File
+ f, err := os.OpenFile(testFile, os.O_WRONLY|os.O_CREATE, 0666)
+ if err != nil {
+ t.Fatalf("creating test file failed: %s", err)
+ }
+ f.Sync()
+
+ f.WriteString("data")
+ f.Sync()
+ f.Close()
+
+ // Add a watch for testFile
+ addWatch(t, watcher, testFile)
+
+ if err := os.Chmod(testFile, 0700); err != nil {
+ t.Fatalf("chmod failed: %s", err)
+ }
+
+ // We expect this event to be received almost immediately, but let's wait 500 ms to be sure
+ // Creating/writing a file changes also the mtime, so IsAttrib should be set to true here
+ time.Sleep(500 * time.Millisecond)
+ if modifyReceived.value() != 0 {
+ t.Fatal("received an unexpected modify event when creating a test file")
+ }
+ if attribReceived.value() == 0 {
+ t.Fatal("fsnotify attribute events have not received after 500 ms")
+ }
+
+ // Modifying the contents of the file does not set the attrib flag (although eg. the mtime
+ // might have been modified).
+ modifyReceived.reset()
+ attribReceived.reset()
+
+ f, err = os.OpenFile(testFile, os.O_WRONLY, 0)
+ if err != nil {
+ t.Fatalf("reopening test file failed: %s", err)
+ }
+
+ f.WriteString("more data")
+ f.Sync()
+ f.Close()
+
+ time.Sleep(500 * time.Millisecond)
+
+ if modifyReceived.value() != 1 {
+ t.Fatal("didn't receive a modify event after changing test file contents")
+ }
+
+ if attribReceived.value() != 0 {
+ t.Fatal("did receive an unexpected attrib event after changing test file contents")
+ }
+
+ modifyReceived.reset()
+ attribReceived.reset()
+
+ // Doing a chmod on the file should trigger an event with the "attrib" flag set (the contents
+ // of the file are not changed though)
+ if err := os.Chmod(testFile, 0600); err != nil {
+ t.Fatalf("chmod failed: %s", err)
+ }
+
+ time.Sleep(500 * time.Millisecond)
+
+ if attribReceived.value() != 1 {
+ t.Fatal("didn't receive an attribute change after 500ms")
+ }
+
+ // Try closing the fsnotify instance
+ t.Log("calling Close()")
+ watcher.Close()
+ t.Log("waiting for the event channel to become closed...")
+ select {
+ case <-done:
+ t.Log("event channel closed")
+ case <-time.After(1e9):
+ t.Fatal("event stream was not closed after 1 second")
+ }
+
+ os.Remove(testFile)
+}
+
+func TestFsnotifyClose(t *testing.T) {
+ watcher := newWatcher(t)
+ watcher.Close()
+
+ var done int32
+ go func() {
+ watcher.Close()
+ atomic.StoreInt32(&done, 1)
+ }()
+
+ time.Sleep(50e6) // 50 ms
+ if atomic.LoadInt32(&done) == 0 {
+ t.Fatal("double Close() test failed: second Close() call didn't return")
+ }
+
+ testDir := tempMkdir(t)
+ defer os.RemoveAll(testDir)
+
+ if err := watcher.Add(testDir); err == nil {
+ t.Fatal("expected error on Watch() after Close(), got nil")
+ }
+}
+
+func TestFsnotifyFakeSymlink(t *testing.T) {
+ if runtime.GOOS == "windows" {
+ t.Skip("symlinks don't work on Windows.")
+ }
+
+ watcher := newWatcher(t)
+
+ // Create directory to watch
+ testDir := tempMkdir(t)
+ defer os.RemoveAll(testDir)
+
+ var errorsReceived counter
+ // Receive errors on the error channel on a separate goroutine
+ go func() {
+ for errors := range watcher.Errors {
+ t.Logf("Received error: %s", errors)
+ errorsReceived.increment()
+ }
+ }()
+
+ // Count the CREATE events received
+ var createEventsReceived, otherEventsReceived counter
+ go func() {
+ for ev := range watcher.Events {
+ t.Logf("event received: %s", ev)
+ if ev.Op&Create == Create {
+ createEventsReceived.increment()
+ } else {
+ otherEventsReceived.increment()
+ }
+ }
+ }()
+
+ addWatch(t, watcher, testDir)
+
+ if err := os.Symlink(filepath.Join(testDir, "zzz"), filepath.Join(testDir, "zzznew")); err != nil {
+ t.Fatalf("Failed to create bogus symlink: %s", err)
+ }
+ t.Logf("Created bogus symlink")
+
+ // We expect this event to be received almost immediately, but let's wait 500 ms to be sure
+ time.Sleep(500 * time.Millisecond)
+
+ // Should not be error, just no events for broken links (watching nothing)
+ if errorsReceived.value() > 0 {
+ t.Fatal("fsnotify errors have been received.")
+ }
+ if otherEventsReceived.value() > 0 {
+ t.Fatal("fsnotify other events received on the broken link")
+ }
+
+ // Except for 1 create event (for the link itself)
+ if createEventsReceived.value() == 0 {
+ t.Fatal("fsnotify create events were not received after 500 ms")
+ }
+ if createEventsReceived.value() > 1 {
+ t.Fatal("fsnotify more create events received than expected")
+ }
+
+ // Try closing the fsnotify instance
+ t.Log("calling Close()")
+ watcher.Close()
+}
+
+func TestCyclicSymlink(t *testing.T) {
+ if runtime.GOOS == "windows" {
+ t.Skip("symlinks don't work on Windows.")
+ }
+
+ watcher := newWatcher(t)
+
+ testDir := tempMkdir(t)
+ defer os.RemoveAll(testDir)
+
+ link := path.Join(testDir, "link")
+ if err := os.Symlink(".", link); err != nil {
+ t.Fatalf("could not make symlink: %v", err)
+ }
+ addWatch(t, watcher, testDir)
+
+ var createEventsReceived counter
+ go func() {
+ for ev := range watcher.Events {
+ if ev.Op&Create == Create {
+ createEventsReceived.increment()
+ }
+ }
+ }()
+
+ if err := os.Remove(link); err != nil {
+ t.Fatalf("Error removing link: %v", err)
+ }
+
+ // It would be nice to be able to expect a delete event here, but kqueue has
+ // no way for us to get events on symlinks themselves, because opening them
+ // opens an fd to the file to which they point.
+
+ if err := ioutil.WriteFile(link, []byte("foo"), 0700); err != nil {
+ t.Fatalf("could not make symlink: %v", err)
+ }
+
+ // We expect this event to be received almost immediately, but let's wait 500 ms to be sure
+ time.Sleep(500 * time.Millisecond)
+
+ if got := createEventsReceived.value(); got == 0 {
+ t.Errorf("want at least 1 create event got %v", got)
+ }
+
+ watcher.Close()
+}
+
+// TestConcurrentRemovalOfWatch tests that concurrent calls to RemoveWatch do not race.
+// See https://codereview.appspot.com/103300045/
+// go test -test.run=TestConcurrentRemovalOfWatch -test.cpu=1,1,1,1,1 -race
+func TestConcurrentRemovalOfWatch(t *testing.T) {
+ if runtime.GOOS != "darwin" {
+ t.Skip("regression test for race only present on darwin")
+ }
+
+ // Create directory to watch
+ testDir := tempMkdir(t)
+ defer os.RemoveAll(testDir)
+
+ // Create a file before watching directory
+ testFileAlreadyExists := filepath.Join(testDir, "TestFsnotifyEventsExisting.testfile")
+ {
+ var f *os.File
+ f, err := os.OpenFile(testFileAlreadyExists, os.O_WRONLY|os.O_CREATE, 0666)
+ if err != nil {
+ t.Fatalf("creating test file failed: %s", err)
+ }
+ f.Sync()
+ f.Close()
+ }
+
+ watcher := newWatcher(t)
+ defer watcher.Close()
+
+ addWatch(t, watcher, testDir)
+
+ // Test that RemoveWatch can be invoked concurrently, with no data races.
+ removed1 := make(chan struct{})
+ go func() {
+ defer close(removed1)
+ watcher.Remove(testDir)
+ }()
+ removed2 := make(chan struct{})
+ go func() {
+ close(removed2)
+ watcher.Remove(testDir)
+ }()
+ <-removed1
+ <-removed2
+}
+
+func TestClose(t *testing.T) {
+ // Regression test for #59 bad file descriptor from Close
+ testDir := tempMkdir(t)
+ defer os.RemoveAll(testDir)
+
+ watcher := newWatcher(t)
+ if err := watcher.Add(testDir); err != nil {
+ t.Fatalf("Expected no error on Add, got %v", err)
+ }
+ err := watcher.Close()
+ if err != nil {
+ t.Fatalf("Expected no error on Close, got %v.", err)
+ }
+}
+
+// TestRemoveWithClose tests if one can handle Remove events and, at the same
+// time, close Watcher object without any data races.
+func TestRemoveWithClose(t *testing.T) {
+ testDir := tempMkdir(t)
+ defer os.RemoveAll(testDir)
+
+ const fileN = 200
+ tempFiles := make([]string, 0, fileN)
+ for i := 0; i < fileN; i++ {
+ tempFiles = append(tempFiles, tempMkFile(t, testDir))
+ }
+ watcher := newWatcher(t)
+ if err := watcher.Add(testDir); err != nil {
+ t.Fatalf("Expected no error on Add, got %v", err)
+ }
+ startC, stopC := make(chan struct{}), make(chan struct{})
+ errC := make(chan error)
+ go func() {
+ for {
+ select {
+ case <-watcher.Errors:
+ case <-watcher.Events:
+ case <-stopC:
+ return
+ }
+ }
+ }()
+ go func() {
+ <-startC
+ for _, fileName := range tempFiles {
+ os.Remove(fileName)
+ }
+ }()
+ go func() {
+ <-startC
+ errC <- watcher.Close()
+ }()
+ close(startC)
+ defer close(stopC)
+ if err := <-errC; err != nil {
+ t.Fatalf("Expected no error on Close, got %v.", err)
+ }
+}
+
+func testRename(file1, file2 string) error {
+ switch runtime.GOOS {
+ case "windows", "plan9":
+ return os.Rename(file1, file2)
+ default:
+ cmd := exec.Command("mv", file1, file2)
+ return cmd.Run()
+ }
+}
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