how to use FBTestSession with Setup call of unit test - integration-testing

Question

I'm trying to set up my unit test to use the latest facebook SDK and am running into issues...
Here is the code i have:
[FBSession setDefaultAppID: #"323351877676429"];
FBTestSession *session = [FBTestSession sessionWithSharedUserWithPermissions: [NSArray array]];
STAssertNotNil(session, #"could not create test session");
[FBTestSession openActiveSessionWithReadPermissions:#[]
allowLoginUI:NO
completionHandler:^(FBSession *session, FBSessionState status, NSError *error) {
NSLog(#"completed");
[FBSession setActiveSession: session];
STAssertNil(error, error.description);
STAssertNotNil(FBSession.activeSession, #"FBSession missing");
STAssertNotNil(FBSession.activeSession.accessTokenData, #"FBSession missing");
STAssertNotNil(FBSession.activeSession.accessTokenData.accessToken, #"facebook token is nil");
STAssertNotNil(session, #"FBSession missing");
STAssertNotNil(session.accessTokenData, #"FBSession missing");
STAssertNotNil(session.accessTokenData.accessToken, #"facebook token is nil");
userModel *userM = [[userModel alloc] init];
[userM awakeFromNib];
} ];
This works well except that as it runs asynchronously, when my test are run the session is not ready and thus i have session.accessTokenData == nil., which make my other test fail.
If i add the below code to my set up method after the openSession call, then the setup method never returns.
while (!FBSession.activeSession.accessTokenData)
[NSThread sleepForTimeInterval:.2];
Is there an exemple of proper use of FBTestSession somewhere? Any clue as to how to proceed?
Thanks, olivier

Answer 1

You are close, you just need to wait until the blocks are complete. Here is a working example (slightly shortened/modified) that you can use for reference.
- (void)testFacebookLogin {
__block bool blockFinished = NO;
FBTestSession *fbSession = [FBTestSession sessionWithSharedUserWithPermissions:#[#"email"]];
[fbSession openWithCompletionHandler:^(FBSession *session, FBSessionState status, NSError *error) {
NSLog(#"session %#, status %d, error %#", session, status, error);
[FBSession setActiveSession:session];
FBRequest *me = [FBRequest requestForMe];
NSLog(#"me request %#", me);
[me startWithCompletionHandler: ^(FBRequestConnection *connection,
NSDictionary<FBGraphUser> *my,
NSError *error) {
STAssertNotNil(my.id, #"id shouldn't be nil");
blockFinished = YES;
}];
}];
// Run loop
NSDate *loopUntil = [NSDate dateWithTimeIntervalSinceNow:10];
while (blockFinished == NO && [loopUntil timeIntervalSinceNow] > 0) {
[[NSRunLoop currentRunLoop] runMode:NSDefaultRunLoopMode
beforeDate:loopUntil];
}
}