How to create a UITest that uses SwiftData thats only stored in memory.

Oscar de la Hera Gomez
Three flowers that represent SwiftData, Swift Testing and XCode side by side. Beneath them sits the text "Test from Memory".

This is useful for creating tests that start with no memory (i.e. clean start) and where memory is cleared on terminate.

The following tutorial shows how we found temporary files from our upcoming app Object Capture Pro. If you wish to be updated on the progress and release of this app, please subscribe using the link below.

A screenshot of XCode showing how we used the argument to change the configuration of a SwiftData persistent container.

To test SwiftData from memory in Swift Testing, setup a command line argument and use it to alter the configuration of the ModelContainer.

Then in a UI Test, launch the app with that argument.

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