public async Task ModifyContent_And_Delete_File_Succeeds_And_Callsback_Registered_Triggers()
{
var fileName = Guid.NewGuid().ToString();
var fileLocation = Path.Combine(Path.GetTempPath(), fileName);
File.WriteAllText(fileLocation, "OldContent");
var provider = new PhysicalFileProvider(Path.GetTempPath());
var fileInfo = provider.GetFileInfo(fileName);
Assert.Equal(new FileInfo(fileInfo.PhysicalPath).Length, fileInfo.Length);
Assert.True(fileInfo.Exists);
IExpirationTrigger trigger3 = null, trigger4 = null;
var trigger1 = provider.Watch(fileName);
var trigger2 = provider.Watch(fileName);
// Valid trigger1 created.
Assert.NotNull(trigger1);
Assert.False(trigger1.IsExpired);
Assert.True(trigger1.ActiveExpirationCallbacks);
// Valid trigger2 created.
Assert.NotNull(trigger2);
Assert.False(trigger2.IsExpired);
Assert.True(trigger2.ActiveExpirationCallbacks);
// Trigger is the same for a specific file.
Assert.Equal(trigger2, trigger1);
trigger1.RegisterExpirationCallback(state =>
{
var infoFromState = state as IFileInfo;
trigger3 = provider.Watch(infoFromState.Name);
Assert.NotNull(trigger3);
trigger3.RegisterExpirationCallback(_ => { }, null);
Assert.False(trigger3.IsExpired);
}, state: fileInfo);
trigger2.RegisterExpirationCallback(state =>
{
var infoFromState = state as IFileInfo;
trigger4 = provider.Watch(infoFromState.Name);
Assert.NotNull(trigger4);
trigger4.RegisterExpirationCallback(_ => { }, null);
Assert.False(trigger4.IsExpired);
}, state: fileInfo);
// Write new content.
File.WriteAllText(fileLocation, "OldContent + NewContent");
Assert.True(fileInfo.Exists);
// Wait for callbacks to be fired.
await Task.Delay(WAIT_TIME_FOR_TRIGGER_TO_FIRE);
Assert.True(trigger1.IsExpired);
Assert.True(trigger2.IsExpired);
// Trigger is the same for a specific file.
Assert.Equal(trigger4, trigger3);
// A new trigger is created.
Assert.NotEqual(trigger1, trigger3);
// Delete the file and verify file info is updated.
File.Delete(fileLocation);
fileInfo = provider.GetFileInfo(fileName);
Assert.False(fileInfo.Exists);
Assert.False(new FileInfo(fileLocation).Exists);
// Wait for callbacks to be fired.
await Task.Delay(WAIT_TIME_FOR_TRIGGER_TO_FIRE);
Assert.True(trigger3.IsExpired);
Assert.True(trigger4.IsExpired);
}
