Xcode UI tests - Lost connection to test manager s

问题:

Sometimes while running my UI tests, I get the following error Lost connection to test manager services. No logs or anything. Happens randomly. I would provide more information but I just don't have it because of the nature of the error.

Using Xcode 7 beta 5.

回答1:

The error appear for every async operations made in tests. It can be:

1. Operation on non existing object
2. dispatch_after
3. Network operations with wrongly assign block handler

回答2:

I was getting the same error when running UI tests written in Swift. It turned out that the memory usage was increasing constantly when running a longer test (no memory release). When memory had been exhausted, the device "Lost connection to test manager services."

The solution? Using 'autoreleasepool' in its Swift version, in proper places.