This app is still a work in progress but I am making it public at this point because it is a demonstration of how to use SwiftUI, Combine, and CoreData, in an MVVM architecture. Also it demonstrates how to write tests for these things.
I used Rui Peres's tutorial as a guideline: https://www.raywenderlich.com/4161005-mvvm-with-combine-tutorial-for-ios
I am very happy to have suggestions on how to improve this.
One thing I am not too happy with is having to import SwiftUI into some of my View Models because of the ViewBuilders. If anyone has better suggestions please let me know. Thanks.
Please note, this app will only work if you have non-DRM-protected songs in the music library on your phone.