What are mocking and stubbing techniques for Core Data in Swift?

Mocking and stubbing techniques for Core Data in Swift allow developers to create tests for their applications without relying on the actual data persistence layer. This ensures that tests are fast, reliable, and do not require a database setup.
Core Data, Mocking, Stubbing, Swift, Unit Testing, Data Persistence
// Example of stubbing a Core Data managed object in Swift import CoreData import XCTest class User: NSManagedObject { @NSManaged var name: String? @NSManaged var age: Int16 } class UserTests: XCTestCase { var context: NSManagedObjectContext! override func setUp() { super.setUp() // Create an in-memory persistent store for testing let container = NSPersistentContainer(name: "ModelName") container.persistentStoreDescriptions.first?.url = URL(fileURLWithPath: "/dev/null") container.loadPersistentStores { (storeDescription, error) in if let error = error as NSError? { fatalError("Unresolved error \(error), \(error.userInfo)") } } context = container.viewContext } func testCreateUser() { let user = User(context: context) user.name = "John Doe" user.age = 30 // Verify the user properties XCTAssertEqual(user.name, "John Doe") XCTAssertEqual(user.age, 30) } }

Core Data Mocking Stubbing Swift Unit Testing Data Persistence

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