How to run tests without host app?

[tedrog36]

We would like to run unit tests as pure unit tests without running our host application.

How can that be accomplished?

[rptoma]

Seems a workaround is to create a framework target (e.g. a Core framework) and unit test the framework instead of the app.
If I try to test the app without "Allow testing Host application API", I receive an undefined symbol compilation error.