Failures when asserting array elements in json response

[mujx]

I had some failures with sync::can_sync_a_room_with_a_single_message, here is particular.

The order of the elements in a json array is not guaranteed (I think is alphabetical) so we shouldn't use next to test the existence of the EventIds.

[farodin91]

The Order of the array is important.
Possible we need to add a order to sql statement. I can lookup the spec later. This array represents the timeline.

[mujx]

I added more events, and it works fine. Still can't figure out what caused the failures.

[mujx]

I am closing this since I can't reproduce. It was probably an one time thing during development.

[mujx]

I am re-opening because the travis build failed with this error.

[farodin91]

I think my implementation of sync is incorrect. This need to be test more.