how to test core data model used in a framework in swift

Question

I'm writing a swift framework and I'm using a template from 'pod lib create' command. in my development pods, I've created a core data model file and I'm using core data in my framework. now I want to write unit tests for it. this is my unit test class code:

import XCTest
import CoreData
@testable import MyFramework

class MyClassTests: XCTestCase {

    var testPersistentContainer: NSPersistentContainer?

    override func setUp() {
        let persistentStoreDescription = NSPersistentStoreDescription()
        persistentStoreDescription.type = NSInMemoryStoreType

        let container = NSPersistentContainer(name: "MyCoreDataModelFileName")
        container.persistentStoreDescriptions = [persistentStoreDescription]
        container.loadPersistentStores { (storeDescription, error) in
            if let error = error {
                fatalError(error.localizedDescription)
            }
        }

        self.testPersistentContainer = container
    }

    override func tearDown() {

    }

    func testSomething() {
        // the persistent container I'm trying to use is nil
        XCTAssertNotNil(self.testPersistentContainer)
    }
}

I know what is the problem, the problem is that the test target can't find my core data model file, and when I create a file with a proper name in my example app target, the above test passes. but

Question

What is the correct way of testing the core data model of a framework?

Answer 1

Have you tried loading the Core Data model from the framework bundle?

let managedObjectModel = NSManagedObjectModel.mergedModel(from: nil)

Then you won't need to add it to your test target