Add failing test for isMemo bug (#2390)

[bdwain]

This is in response to #2390 . By throwing away the type information of the render result, we cause isMemo checks to fail on elements that have gone through the wrapper. Ideally they would pass the isMemo check

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.31%. Comparing base (f046079) to head (42d5f9e).
⚠️ Report is 78 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2408   +/-   ##
=======================================
  Coverage   96.31%   96.31%           
=======================================
  Files          49       49           
  Lines        4204     4207    +3     
  Branches     1130     1130           
=======================================
+ Hits         4049     4052    +3     
  Misses        155      155           

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