UniqueId

[JDCain]

In issue #1208 Brad says:
The UniqueID property exists solely to compare test cases, especially as it applies to serialization. It came into being solely to support the architecture of VSTest, which does discovery in one process and execution in another.

Does this mean that if I am writing a vstest logger or data collector the UniqueId property in events are originally generated by xUnit?

[bradwilson]

I honestly have no idea how our UniqueID correlates to the one provided by VSTest.

[JDCain]

@bradwilson I was able to track down that I was looking for here:

xunit/src/xunit.runner.visualstudio/Sinks/VsDiscoverySink.cs

Line 89 in a8614d3

result.Id = GuidFromString(uri + descriptor.UniqueID);

For anyone who finds this: xUnit overrides the default Id generation of TestPlatform by setting the Guid it's self based off the executor and uniqueId. This explains to me why xUnit theories don't generate duplicate TestId's within a run by vstest.