tests for concurrent modification of items while a sync runs

Submitted by Patrick Ohly `@pohly`

Assigned to SyncEvolution Community

---- Reported by patrick.ohly@intel.com 2011-10-26 12:15:48 +0000 ----

This can be automated by running a sync and making changes via a second client, similar to the interrupted sync tests.

Need a complete list of scenarios and the expected outcome:

new item on peer gets removed => remove it sooner or later (next session?)
new item on peer gets updated => transfer new data immediately or in next session
same item gets added by first and second client => only add once, merge if necessary
existing item gets updated by first and second client => merge and keep most recent data
...

--- Bug imported by patrick.ohly@gmx.de 2012-07-29 20:36 UTC ---

This bug was previously known as bug 23770 at https://bugs.meego.com/show_bug.cgi?id=23770