Add D2D1TransformMapper<T> GC collect unit test #506
Merged
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Description
This PR adds a unit test for the GC collection logic for
D2D1TransformMapper<T>
. In particular, this validates that the RCW and CCW won't mutually keep each other alive if there are no other references to either of them. That is, the CCW should instead reset its GC handle back to the RCW if the only reference to it is the one from the RCW.