138 lines
3.3 KiB
Go
138 lines
3.3 KiB
Go
/*
|
|
Copyright 2015 The Kubernetes Authors.
|
|
|
|
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 file
|
|
|
|
import (
|
|
"os"
|
|
"path"
|
|
"path/filepath"
|
|
"testing"
|
|
"time"
|
|
)
|
|
|
|
func prepareTimeout() chan bool {
|
|
timeoutChan := make(chan bool, 1)
|
|
go func() {
|
|
time.Sleep(500 * time.Millisecond)
|
|
timeoutChan <- true
|
|
}()
|
|
return timeoutChan
|
|
}
|
|
|
|
func TestFileWatcher(t *testing.T) {
|
|
f, err := os.CreateTemp("", "fw")
|
|
if err != nil {
|
|
t.Fatalf("unexpected error: %v", err)
|
|
}
|
|
defer f.Close()
|
|
defer os.Remove(f.Name())
|
|
count := 0
|
|
events := make(chan bool, 10)
|
|
fw, err := NewFileWatcher(f.Name(), func() {
|
|
count++
|
|
if count != 1 {
|
|
t.Fatalf("expected 1 but returned %v", count)
|
|
}
|
|
events <- true
|
|
})
|
|
if err != nil {
|
|
t.Fatalf("unexpected error: %v", err)
|
|
}
|
|
defer fw.Close()
|
|
timeoutChan := prepareTimeout()
|
|
select {
|
|
case <-events:
|
|
t.Fatalf("expected no events before writing a file")
|
|
case <-timeoutChan:
|
|
}
|
|
os.WriteFile(f.Name(), []byte{}, ReadWriteByUser)
|
|
select {
|
|
case <-events:
|
|
case <-timeoutChan:
|
|
t.Fatalf("expected an event shortly after writing a file")
|
|
}
|
|
}
|
|
|
|
func TestFileWatcherWithNestedSymlink(t *testing.T) {
|
|
target1, err := os.CreateTemp("", "t1")
|
|
if err != nil {
|
|
t.Fatalf("unexpected error: %v", err)
|
|
}
|
|
defer target1.Close()
|
|
defer os.Remove(target1.Name())
|
|
dir := path.Dir(target1.Name())
|
|
|
|
innerLink := path.Join(dir, "innerLink")
|
|
if err = os.Symlink(target1.Name(), innerLink); err != nil {
|
|
t.Fatalf("unexpected error: %v", err)
|
|
}
|
|
defer os.Remove(innerLink)
|
|
mainLink := path.Join(dir, "mainLink")
|
|
if err = os.Symlink(innerLink, mainLink); err != nil {
|
|
t.Fatalf("unexpected error: %v", err)
|
|
}
|
|
defer os.Remove(mainLink)
|
|
|
|
targetName, err := filepath.EvalSymlinks(mainLink)
|
|
if err != nil {
|
|
t.Fatalf("unexpected error: %v", err)
|
|
}
|
|
if targetName != target1.Name() {
|
|
t.Fatalf("expected symlink to point to %v, not %v", target1.Name(), targetName)
|
|
}
|
|
|
|
count := 0
|
|
events := make(chan bool, 10)
|
|
fw, err := NewFileWatcher(mainLink, func() {
|
|
count++
|
|
if count != 1 {
|
|
t.Fatalf("expected 1 but returned %v", count)
|
|
}
|
|
if targetName, err = filepath.EvalSymlinks(mainLink); err != nil {
|
|
t.Fatalf("unexpected error: %v", err)
|
|
}
|
|
events <- true
|
|
})
|
|
if err != nil {
|
|
t.Fatalf("unexpected error: %v", err)
|
|
}
|
|
defer fw.Close()
|
|
|
|
target2, err := os.CreateTemp("", "t2")
|
|
if err != nil {
|
|
t.Fatalf("unexpected error: %v", err)
|
|
}
|
|
defer target2.Close()
|
|
defer os.Remove(target2.Name())
|
|
|
|
if err = os.Remove(innerLink); err != nil {
|
|
t.Fatalf("unexpected error: %v", err)
|
|
}
|
|
if err = os.Symlink(target2.Name(), innerLink); err != nil {
|
|
t.Fatalf("unexpected error: %v", err)
|
|
}
|
|
|
|
timeoutChan := prepareTimeout()
|
|
select {
|
|
case <-events:
|
|
case <-timeoutChan:
|
|
t.Fatalf("expected an event shortly after creating a file and relinking")
|
|
}
|
|
if targetName != target2.Name() {
|
|
t.Fatalf("expected symlink to point to %v, not %v", target2.Name(), targetName)
|
|
}
|
|
}
|