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reader_test.go
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reader_test.go
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package igotify
import (
"errors"
"os"
"sync"
"syscall"
"testing"
"time"
)
const filename = "test123.txt"
func TestReader_Listen_StopWithoutError(t *testing.T) {
r, err := NewReader(32, DefaultFlags)
if err != nil {
t.Fatal(err)
}
if _, err := r.AddWatcher(".", syscall.IN_CREATE); err != nil {
t.Fatal(err)
}
var wg sync.WaitGroup
wg.Add(1)
go func() {
defer wg.Done()
if err := r.Listen(); err != nil {
t.Fatal(err)
}
}()
time.Sleep(100 * time.Millisecond)
r.Stop()
wg.Wait()
}
func TestReader_Listen_StopWithoutError_WithNotify(t *testing.T) {
r, err := NewReader(32, DefaultFlags)
if err != nil {
t.Fatal(err)
}
if _, err := r.AddWatcher(".", syscall.IN_CREATE); err != nil {
t.Fatal(err)
}
var wg sync.WaitGroup
wg.Add(1)
go func() {
defer wg.Done()
if err := r.Listen(); err != nil {
t.Fatal(err)
}
}()
go func() {
defer os.Remove(filename)
create, err := os.Create(filename)
if err != nil {
t.Fatal(err)
}
create.Close()
}()
gotEvent := false
go func() {
event, err := r.Get()
if err != nil {
t.Errorf("cannot get event: %v", err)
return
}
if event.Name != filename {
t.Errorf("expected event for %s, got %s", filename, event.Name)
return
}
gotEvent = true
}()
time.Sleep(100 * time.Millisecond)
r.Stop()
wg.Wait()
if !gotEvent {
t.Error("expected event, got none")
}
}
func TestReader_Listen_Get(t *testing.T) {
r, err := NewReader(32, DefaultFlags)
if err != nil {
t.Fatal(err)
}
if _, err := r.AddWatcher(".", syscall.IN_CREATE|syscall.IN_DELETE); err != nil {
t.Fatal(err)
}
go func() {
if err := r.Listen(); err != nil {
t.Fatal(err)
}
}()
go func() {
defer os.Remove(filename)
create, err := os.Create(filename)
if err != nil {
t.Fatal(err)
}
create.Close()
}()
gotEvent := false
go func() {
event, err := r.Get()
if err != nil {
t.Errorf("cannot get event: %v", err)
return
}
if event.Name != filename {
t.Errorf("expected event for %s, got %s", filename, event.Name)
return
}
if event.Mask&syscall.IN_CREATE == 0 {
t.Errorf("expected event type %s, got %s", IN_CREATE, maskString(event.Mask))
return
}
event, err = r.Get()
if err != nil {
t.Errorf("cannot get event: %v", err)
return
}
t.Logf("got event %s", event)
if event.Name != filename {
t.Errorf("expected event for %s, got %s", filename, event.Name)
return
}
if event.Mask&syscall.IN_DELETE == 0 {
t.Errorf("expected event type %s, got %s", IN_DELETE, maskString(event.Mask))
return
}
gotEvent = true
}()
time.Sleep(100 * time.Millisecond)
r.Stop()
if !gotEvent {
t.Error("expected event, got none")
}
}
func TestReader_AddWatcher(t *testing.T) {
r, err := NewReader(128, DefaultFlags)
if err != nil {
t.Fatal(err)
}
go r.Listen()
go func() {
file, err := os.Create(filename)
if err != nil {
t.Fatal(err)
}
file.Close()
}()
_, err = r.GetWithTimeout(100 * time.Millisecond)
if err != nil {
if !errors.Is(err, ErrTimeout) {
t.Errorf("expected timeout, got: %v", err)
}
}
_, err = r.AddWatcher(".", syscall.IN_CREATE|syscall.IN_DELETE)
if err != nil {
t.Fatal(err)
}
if err = os.Remove(filename); err != nil {
t.Fatalf("cannot remove file: %v", err)
}
event, err := r.GetWithTimeout(1 * time.Second)
if err != nil {
t.Fatal(err)
}
if event.Name != filename || event.Mask&syscall.IN_DELETE == 0 {
t.Fatalf("unexpected event %s", event)
}
}
func TestReader_RemoveWatcher(t *testing.T) {
r, err := NewReader(128, DefaultFlags)
if err != nil {
t.Fatal(err)
}
wd, err := r.AddWatcher(".", syscall.IN_CREATE|syscall.IN_DELETE)
if err != nil {
t.Fatal(err)
}
go r.Listen()
go func() {
file, err := os.Create(filename)
if err != nil {
t.Fatal(err)
}
file.Close()
}()
event, err := r.GetWithTimeout(1 * time.Second)
if err != nil {
t.Fatal(err)
}
if event.Name != filename || event.Mask&syscall.IN_CREATE == 0 {
t.Fatal("unexpected event")
}
if err = r.RemoveWatcher(wd); err != nil {
t.Errorf("cannot remove watcher: %v", err)
}
if err = os.Remove(filename); err != nil {
t.Fatalf("cannot remove file: %v", err)
}
event, err = r.GetWithTimeout(100 * time.Millisecond)
if err != nil {
if errors.Is(err, ErrTimeout) {
return
}
t.Error(err)
} else {
if event.Mask&syscall.IN_IGNORED != 0 {
return
}
t.Errorf("expected an error, got an event %s", event)
}
}
func TestReader_GetWithTimeout_Normal(t *testing.T) {
r, err := NewReader(128, DefaultFlags)
if err != nil {
t.Fatal(err)
}
_, err = r.AddWatcher(".", syscall.IN_CREATE)
if err != nil {
t.Fatal(err)
}
go r.Listen()
go func() {
defer os.Remove(filename)
file, err := os.Create(filename)
if err != nil {
t.Fatal(err)
}
file.Close()
}()
event, err := r.GetWithTimeout(1 * time.Second)
if err != nil {
t.Fatal(err)
}
if event.Name != filename || event.Mask&syscall.IN_CREATE == 0 {
t.Errorf("unexpected event %s", event)
}
}
func TestReader_GetWithTimeout_Timeout(t *testing.T) {
r, err := NewReader(128, DefaultFlags)
if err != nil {
t.Fatal(err)
}
go r.Listen()
go func() {
defer os.Remove(filename)
file, err := os.Create(filename)
if err != nil {
t.Fatal(err)
}
file.Close()
}()
event, err := r.GetWithTimeout(100 * time.Millisecond)
if err == nil {
t.Errorf("expected an error, got an event %s", event)
} else if !errors.Is(err, ErrTimeout) {
t.Error(err)
}
}
func TestReader_Listen_Repeated(t *testing.T) {
r, err := NewReader(128, DefaultFlags)
if err != nil {
t.Fatal(err)
}
resultChan := make(chan bool, 1)
go func() {
resultChan <- true
if err := r.Listen(); err != nil {
t.Fatalf("cannot begin listen: %v", err)
}
}()
defer r.Stop()
<-resultChan
go func() {
if err := r.Listen(); err != nil {
if errors.Is(err, ErrListening) {
resultChan <- true
return
} else {
t.Fatalf("expected error %v, got %v", ErrListening, err)
}
} else {
t.Fatal("expected error from repeated listen, got nil")
}
}()
select {
case <-resultChan:
return
case <-time.After(100 * time.Millisecond):
t.Fatal("repeated listen got through, but should've failed")
}
}
func TestReader_Listen_AfterStop(t *testing.T) {
r, err := NewReader(128, DefaultFlags)
if err != nil {
t.Fatal(err)
}
resultChan := make(chan bool, 1)
go func() {
resultChan <- true
if err := r.Listen(); err != nil {
t.Fatal(err)
}
}()
<-resultChan
r.Stop()
go func() {
if err = r.Listen(); err != nil {
if errors.Is(err, ErrStopped) {
resultChan <- true
return
} else {
t.Fatalf("expected error %v, got %v", ErrStopped, err)
}
} else {
t.Fatal("expected Listen() to return an error, got nil")
}
}()
select {
case <-resultChan:
return
case <-time.After(100 * time.Millisecond):
t.Fatal("timeout while waiting for test to finish")
}
}