├── CoreData-MVVM-Template.xcodeproj ├── project.pbxproj ├── project.xcworkspace │ ├── contents.xcworkspacedata │ └── xcshareddata │ │ └── IDEWorkspaceChecks.plist └── xcuserdata │ └── ces.xcuserdatad │ └── xcschemes │ └── xcschememanagement.plist ├── CoreData-MVVM-Template ├── Assets.xcassets │ ├── AccentColor.colorset │ │ └── Contents.json │ ├── AppIcon.appiconset │ │ └── Contents.json │ └── Contents.json ├── ContentView.swift ├── ContentViewModel.swift ├── CoreData_MVVM_Template.xcdatamodeld │ ├── .xccurrentversion │ └── CoreData_MVVM_Template.xcdatamodel │ │ └── contents ├── CoreData_MVVM_TemplateApp.swift ├── Persistence.swift └── Preview Content │ └── Preview Assets.xcassets │ └── Contents.json ├── CoreData-MVVM-TemplateTests ├── ContentViewModelTests.swift └── CoreData_MVVM_TemplateTests.swift ├── CoreData-MVVM-TemplateUITests ├── CoreData_MVVM_TemplateUITests.swift └── CoreData_MVVM_TemplateUITestsLaunchTests.swift ├── LICENSE └── README.md 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-------------------------------------------------------------------------------- /CoreData-MVVM-Template.xcodeproj/project.xcworkspace/contents.xcworkspacedata: -------------------------------------------------------------------------------- 1 | 2 | 4 | 6 | 7 | 8 | -------------------------------------------------------------------------------- /CoreData-MVVM-Template.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | IDEDidComputeMac32BitWarning 6 | 7 | 8 | 9 | -------------------------------------------------------------------------------- /CoreData-MVVM-Template.xcodeproj/xcuserdata/ces.xcuserdatad/xcschemes/xcschememanagement.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | SchemeUserState 6 | 7 | CoreData-MVVM-Template.xcscheme_^#shared#^_ 8 | 9 | orderHint 10 | 0 11 | 12 | 13 | 14 | 15 | -------------------------------------------------------------------------------- /CoreData-MVVM-Template/Assets.xcassets/AccentColor.colorset/Contents.json: -------------------------------------------------------------------------------- 1 | { 2 | "colors" : [ 3 | { 4 | "idiom" : "universal" 5 | } 6 | ], 7 | "info" : { 8 | "author" : "xcode", 9 | "version" : 1 10 | } 11 | } 12 | -------------------------------------------------------------------------------- /CoreData-MVVM-Template/Assets.xcassets/AppIcon.appiconset/Contents.json: -------------------------------------------------------------------------------- 1 | { 2 | "images" : [ 3 | { 4 | "idiom" : "iphone", 5 | "scale" : "2x", 6 | "size" : "20x20" 7 | }, 8 | { 9 | "idiom" : "iphone", 10 | "scale" : "3x", 11 | "size" : "20x20" 12 | }, 13 | { 14 | "idiom" : "iphone", 15 | "scale" : "2x", 16 | "size" : "29x29" 17 | }, 18 | { 19 | "idiom" : "iphone", 20 | "scale" : "3x", 21 | "size" : "29x29" 22 | }, 23 | { 24 | "idiom" : "iphone", 25 | "scale" : "2x", 26 | "size" : "40x40" 27 | }, 28 | { 29 | "idiom" : "iphone", 30 | "scale" : "3x", 31 | "size" : "40x40" 32 | }, 33 | { 34 | "idiom" : "iphone", 35 | "scale" : "2x", 36 | "size" : "60x60" 37 | }, 38 | { 39 | "idiom" : "iphone", 40 | "scale" : "3x", 41 | "size" : "60x60" 42 | }, 43 | { 44 | "idiom" : "ipad", 45 | "scale" : "1x", 46 | "size" : "20x20" 47 | }, 48 | { 49 | "idiom" : "ipad", 50 | "scale" : "2x", 51 | "size" : "20x20" 52 | }, 53 | { 54 | "idiom" : "ipad", 55 | "scale" : "1x", 56 | "size" : "29x29" 57 | }, 58 | { 59 | "idiom" : "ipad", 60 | "scale" : "2x", 61 | "size" : "29x29" 62 | }, 63 | { 64 | "idiom" : "ipad", 65 | "scale" : "1x", 66 | "size" : "40x40" 67 | }, 68 | { 69 | "idiom" : "ipad", 70 | "scale" : "2x", 71 | "size" : "40x40" 72 | }, 73 | { 74 | "idiom" : "ipad", 75 | "scale" : "2x", 76 | "size" : "76x76" 77 | }, 78 | { 79 | "idiom" : "ipad", 80 | "scale" : "2x", 81 | "size" : "83.5x83.5" 82 | }, 83 | { 84 | "idiom" : "ios-marketing", 85 | "scale" : "1x", 86 | "size" : "1024x1024" 87 | } 88 | ], 89 | "info" : { 90 | "author" : "xcode", 91 | "version" : 1 92 | } 93 | } 94 | -------------------------------------------------------------------------------- /CoreData-MVVM-Template/Assets.xcassets/Contents.json: -------------------------------------------------------------------------------- 1 | { 2 | "info" : { 3 | "author" : "xcode", 4 | "version" : 1 5 | } 6 | } 7 | -------------------------------------------------------------------------------- /CoreData-MVVM-Template/ContentView.swift: -------------------------------------------------------------------------------- 1 | // 2 | // ContentView.swift 3 | // CoreData-MVVM-Template 4 | // 5 | // Created by Cesar Mejia Valero on 5/14/22. 6 | // 7 | 8 | import SwiftUI 9 | import CoreData 10 | 11 | struct ContentView: View { 12 | @Environment(\.managedObjectContext) private var viewContext 13 | @EnvironmentObject var persistenceController: PersistenceController 14 | 15 | @StateObject private var viewModel: ViewModel 16 | 17 | init(persistenceController: PersistenceController) { 18 | let viewModel = ViewModel(persistenceController: persistenceController) 19 | _viewModel = StateObject(wrappedValue: viewModel) 20 | } 21 | 22 | var body: some View { 23 | NavigationView { 24 | List { 25 | ForEach(viewModel.items) { item in 26 | NavigationLink { 27 | Text("Item at \(item.timestamp!, formatter: itemFormatter)") 28 | } label: { 29 | Text(item.timestamp!, formatter: itemFormatter) 30 | } 31 | } 32 | .onDelete { indexSet in 33 | Task { 34 | await viewModel.deleteItems(offsets: indexSet) 35 | } 36 | } 37 | } 38 | .alert("An error occurred.", isPresented: $viewModel.showErrorAlert) { 39 | Button("OK") {} 40 | } message: { 41 | Text("Please ensure your credentials are correct. Error: \(viewModel.errorMessage)") 42 | } 43 | .toolbar { 44 | ToolbarItem(placement: .navigationBarTrailing) { 45 | EditButton() 46 | } 47 | ToolbarItem { 48 | Button(action: { 49 | Task { 50 | await viewModel.addItem(with: Date.now) 51 | } 52 | }) { 53 | Label("Add Item", systemImage: "plus") 54 | } 55 | } 56 | } 57 | .animation(.default, value: viewModel.items) // replacement for withAnimation not working with Task 58 | Text("Select an item") 59 | } 60 | } 61 | } 62 | 63 | private let itemFormatter: DateFormatter = { 64 | let formatter = DateFormatter() 65 | formatter.dateStyle = .short 66 | formatter.timeStyle = .medium 67 | return formatter 68 | }() 69 | 70 | struct ContentView_Previews: PreviewProvider { 71 | static var previews: some View { 72 | ContentView(persistenceController: PersistenceController.preview) 73 | .environment(\.managedObjectContext, PersistenceController.preview.container.viewContext) 74 | .environmentObject(PersistenceController.preview) 75 | } 76 | } 77 | -------------------------------------------------------------------------------- /CoreData-MVVM-Template/ContentViewModel.swift: -------------------------------------------------------------------------------- 1 | // 2 | // ContentViewModel.swift 3 | // CoreData-MVVM-Template 4 | // 5 | // Created by Cesar Mejia Valero on 5/14/22. 6 | // 7 | 8 | import Foundation 9 | import CoreData 10 | 11 | extension ContentView { 12 | class ViewModel: NSObject, ObservableObject, NSFetchedResultsControllerDelegate { 13 | @Published var items = [Item]() 14 | 15 | @Published var errorMessage = "" 16 | @Published var showErrorAlert = false 17 | 18 | private let itemsController: NSFetchedResultsController 19 | let persistenceController: PersistenceController 20 | 21 | init(persistenceController: PersistenceController) { 22 | self.persistenceController = persistenceController 23 | 24 | let request: NSFetchRequest = Item.fetchRequest() 25 | request.sortDescriptors = [NSSortDescriptor(keyPath: \Item.timestamp, ascending: true)] 26 | 27 | itemsController = NSFetchedResultsController( 28 | fetchRequest: request, 29 | managedObjectContext: persistenceController.container.viewContext, 30 | sectionNameKeyPath: nil, 31 | cacheName: nil 32 | ) 33 | 34 | super.init() 35 | itemsController.delegate = self 36 | 37 | do { 38 | try itemsController.performFetch() 39 | items = itemsController.fetchedObjects ?? [] 40 | } catch { 41 | print("Failed to fetch projects") 42 | } 43 | } 44 | 45 | @MainActor 46 | func addItem(with date: Date) async { 47 | do { 48 | try await persistenceController.addItem(with: date) 49 | } catch { 50 | let nsError = error as NSError 51 | errorMessage = nsError.localizedDescription 52 | showErrorAlert = true 53 | } 54 | } 55 | 56 | @MainActor 57 | func deleteItems(offsets: IndexSet) async { 58 | offsets.map { items[$0] }.forEach(persistenceController.delete) 59 | 60 | do { 61 | try await persistenceController.save() 62 | } catch { 63 | let nsError = error as NSError 64 | errorMessage = nsError.localizedDescription 65 | showErrorAlert = true 66 | } 67 | } 68 | 69 | func controllerDidChangeContent(_ controller: NSFetchedResultsController) { 70 | if let newItems = controller.fetchedObjects as? [Item] { 71 | items = newItems 72 | } 73 | } 74 | } 75 | } 76 | -------------------------------------------------------------------------------- /CoreData-MVVM-Template/CoreData_MVVM_Template.xcdatamodeld/.xccurrentversion: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | _XCCurrentVersionName 6 | CoreData_MVVM_Template.xcdatamodel 7 | 8 | 9 | -------------------------------------------------------------------------------- /CoreData-MVVM-Template/CoreData_MVVM_Template.xcdatamodeld/CoreData_MVVM_Template.xcdatamodel/contents: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | -------------------------------------------------------------------------------- /CoreData-MVVM-Template/CoreData_MVVM_TemplateApp.swift: -------------------------------------------------------------------------------- 1 | // 2 | // CoreData_MVVM_TemplateApp.swift 3 | // CoreData-MVVM-Template 4 | // 5 | // Created by Cesar Mejia Valero on 5/14/22. 6 | // 7 | 8 | import SwiftUI 9 | 10 | @main 11 | struct CoreData_MVVM_TemplateApp: App { 12 | @StateObject var persistenceController = PersistenceController.shared 13 | 14 | var body: some Scene { 15 | WindowGroup { 16 | ContentView(persistenceController: persistenceController) 17 | .environment(\.managedObjectContext, persistenceController.container.viewContext) 18 | .environmentObject(persistenceController) 19 | } 20 | } 21 | } 22 | -------------------------------------------------------------------------------- /CoreData-MVVM-Template/Persistence.swift: -------------------------------------------------------------------------------- 1 | // 2 | // Persistence.swift 3 | // CoreData-MVVM-Template 4 | // 5 | // Created by Cesar Mejia Valero on 5/14/22. 6 | // 7 | 8 | import CoreData 9 | 10 | class PersistenceController: ObservableObject { 11 | static let shared = PersistenceController() 12 | 13 | static var preview: PersistenceController = { 14 | let result = PersistenceController(inMemory: true) 15 | // let viewContext = result.container.viewContext 16 | result.createSampleData() 17 | return result 18 | }() 19 | 20 | let container: NSPersistentContainer 21 | 22 | init(inMemory: Bool = false) { 23 | container = NSPersistentContainer(name: "CoreData_MVVM_Template") 24 | if inMemory { 25 | container.persistentStoreDescriptions.first!.url = URL(fileURLWithPath: "/dev/null") 26 | } 27 | container.loadPersistentStores(completionHandler: { (storeDescription, error) in 28 | if let error = error as NSError? { 29 | // Replace this implementation with code to handle the error appropriately. 30 | // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. 31 | 32 | /* 33 | Typical reasons for an error here include: 34 | * The parent directory does not exist, cannot be created, or disallows writing. 35 | * The persistent store is not accessible, due to permissions or data protection when the device is locked. 36 | * The device is out of space. 37 | * The store could not be migrated to the current model version. 38 | Check the error message to determine what the actual problem was. 39 | */ 40 | fatalError("Unresolved error \(error), \(error.userInfo)") 41 | } 42 | }) 43 | container.viewContext.automaticallyMergesChangesFromParent = true 44 | } 45 | 46 | func createSampleData() { 47 | let viewContext = container.viewContext 48 | for _ in 0..<10 { 49 | let newItem = Item(context: viewContext) 50 | newItem.timestamp = Date() 51 | } 52 | do { 53 | try viewContext.save() 54 | } catch { 55 | // Replace this implementation with code to handle the error appropriately. 56 | // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. 57 | let nsError = error as NSError 58 | fatalError("Unresolved error \(nsError), \(nsError.userInfo)") 59 | } 60 | } 61 | 62 | func deleteAll() { 63 | let fetchRequest: NSFetchRequest = Item.fetchRequest() 64 | let batchDeleteRequest = NSBatchDeleteRequest(fetchRequest: fetchRequest) 65 | _ = try? container.viewContext.execute(batchDeleteRequest) 66 | } 67 | 68 | func save() async throws { 69 | let viewContext = container.viewContext 70 | 71 | if viewContext.hasChanges { 72 | try await viewContext.perform { 73 | do { 74 | try viewContext.save() 75 | } catch { 76 | // Replace this implementation with code to handle the error appropriately. 77 | // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. 78 | let nsError = error as NSError 79 | // fatalError("Unresolved error \(nsError), \(nsError.userInfo)") 80 | throw nsError 81 | } 82 | } 83 | } 84 | } 85 | 86 | func delete(_ object: NSManagedObject) { 87 | container.viewContext.delete(object) 88 | } 89 | 90 | func fetchItems() async throws -> [Item] { 91 | return try await container.viewContext.perform { 92 | let request = Item.fetchRequest() 93 | return try request.execute() 94 | } 95 | } 96 | 97 | func addItem(with date: Date) async throws { 98 | let viewContext = container.viewContext 99 | 100 | let newItem = Item(context: viewContext) 101 | newItem.timestamp = date 102 | 103 | do { 104 | try await save() 105 | } catch { 106 | let nsError = error as NSError 107 | throw nsError 108 | } 109 | } 110 | } 111 | -------------------------------------------------------------------------------- /CoreData-MVVM-Template/Preview Content/Preview Assets.xcassets/Contents.json: -------------------------------------------------------------------------------- 1 | { 2 | "info" : { 3 | "author" : "xcode", 4 | "version" : 1 5 | } 6 | } 7 | -------------------------------------------------------------------------------- /CoreData-MVVM-TemplateTests/ContentViewModelTests.swift: -------------------------------------------------------------------------------- 1 | // 2 | // ContentViewModelTests.swift 3 | // CoreData-MVVM-TemplateTests 4 | // 5 | // Created by Cesar Mejia Valero on 5/15/22. 6 | // 7 | 8 | import XCTest 9 | @testable import CoreData_MVVM_Template 10 | 11 | class ContentViewModelTests: XCTestCase { 12 | 13 | var sut: ContentView.ViewModel! 14 | var persistentController: PersistenceController! 15 | 16 | override func setUpWithError() throws { 17 | persistentController = PersistenceController.preview 18 | sut = ContentView.ViewModel(persistenceController: persistentController) 19 | } 20 | 21 | override func tearDownWithError() throws { 22 | sut = nil 23 | persistentController.deleteAll() 24 | persistentController.createSampleData() 25 | } 26 | 27 | func testContentViewModel_WhenInitialized_ItemsAreFetched() throws { 28 | XCTAssertFalse(sut.items.isEmpty) 29 | } 30 | 31 | func testContentViewModel_WhenAddingAnItem_ItemsAreIncrementedByOne() async throws { 32 | XCTAssertTrue(sut.items.count == 10) 33 | await sut.addItem(with: Date.now) 34 | XCTAssertTrue(sut.items.count == 11) 35 | } 36 | 37 | func testContentViewModel_WhenDeletingAnItem_ItemsAreDecreasedByOne() async throws { 38 | XCTAssertTrue(sut.items.count == 10) 39 | await sut.deleteItems(offsets: IndexSet(integer: 0)) 40 | XCTAssertTrue(sut.items.count == 9) 41 | } 42 | 43 | } 44 | -------------------------------------------------------------------------------- /CoreData-MVVM-TemplateTests/CoreData_MVVM_TemplateTests.swift: -------------------------------------------------------------------------------- 1 | // 2 | // CoreData_MVVM_TemplateTests.swift 3 | // CoreData-MVVM-TemplateTests 4 | // 5 | // Created by Cesar Mejia Valero on 5/14/22. 6 | // 7 | 8 | import XCTest 9 | @testable import CoreData_MVVM_Template 10 | 11 | class CoreData_MVVM_TemplateTests: XCTestCase { 12 | 13 | override func setUpWithError() throws { 14 | // Put setup code here. This method is called before the invocation of each test method in the class. 15 | } 16 | 17 | override func tearDownWithError() throws { 18 | // Put teardown code here. This method is called after the invocation of each test method in the class. 19 | } 20 | 21 | func testExample() throws { 22 | // This is an example of a functional test case. 23 | // Use XCTAssert and related functions to verify your tests produce the correct results. 24 | // Any test you write for XCTest can be annotated as throws and async. 25 | // Mark your test throws to produce an unexpected failure when your test encounters an uncaught error. 26 | // Mark your test async to allow awaiting for asynchronous code to complete. Check the results with assertions afterwards. 27 | } 28 | 29 | func testPerformanceExample() throws { 30 | // This is an example of a performance test case. 31 | self.measure { 32 | // Put the code you want to measure the time of here. 33 | } 34 | } 35 | 36 | } 37 | -------------------------------------------------------------------------------- /CoreData-MVVM-TemplateUITests/CoreData_MVVM_TemplateUITests.swift: -------------------------------------------------------------------------------- 1 | // 2 | // CoreData_MVVM_TemplateUITests.swift 3 | // CoreData-MVVM-TemplateUITests 4 | // 5 | // Created by Cesar Mejia Valero on 5/14/22. 6 | // 7 | 8 | import XCTest 9 | 10 | class CoreData_MVVM_TemplateUITests: XCTestCase { 11 | 12 | override func setUpWithError() throws { 13 | // Put setup code here. This method is called before the invocation of each test method in the class. 14 | 15 | // In UI tests it is usually best to stop immediately when a failure occurs. 16 | continueAfterFailure = false 17 | 18 | // In UI tests it’s important to set the initial state - such as interface orientation - required for your tests before they run. The setUp method is a good place to do this. 19 | } 20 | 21 | override func tearDownWithError() throws { 22 | // Put teardown code here. This method is called after the invocation of each test method in the class. 23 | } 24 | 25 | func testExample() throws { 26 | // UI tests must launch the application that they test. 27 | let app = XCUIApplication() 28 | app.launch() 29 | 30 | // Use XCTAssert and related functions to verify your tests produce the correct results. 31 | } 32 | 33 | func testLaunchPerformance() throws { 34 | if #available(macOS 10.15, iOS 13.0, tvOS 13.0, watchOS 7.0, *) { 35 | // This measures how long it takes to launch your application. 36 | measure(metrics: [XCTApplicationLaunchMetric()]) { 37 | XCUIApplication().launch() 38 | } 39 | } 40 | } 41 | } 42 | -------------------------------------------------------------------------------- /CoreData-MVVM-TemplateUITests/CoreData_MVVM_TemplateUITestsLaunchTests.swift: -------------------------------------------------------------------------------- 1 | // 2 | // CoreData_MVVM_TemplateUITestsLaunchTests.swift 3 | // CoreData-MVVM-TemplateUITests 4 | // 5 | // Created by Cesar Mejia Valero on 5/14/22. 6 | // 7 | 8 | import XCTest 9 | 10 | class CoreData_MVVM_TemplateUITestsLaunchTests: XCTestCase { 11 | 12 | override class var runsForEachTargetApplicationUIConfiguration: Bool { 13 | true 14 | } 15 | 16 | override func setUpWithError() throws { 17 | continueAfterFailure = false 18 | } 19 | 20 | func testLaunch() throws { 21 | let app = XCUIApplication() 22 | app.launch() 23 | 24 | // Insert steps here to perform after app launch but before taking a screenshot, 25 | // such as logging into a test account or navigating somewhere in the app 26 | 27 | let attachment = XCTAttachment(screenshot: app.screenshot()) 28 | attachment.name = "Launch Screen" 29 | attachment.lifetime = .keepAlways 30 | add(attachment) 31 | } 32 | } 33 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | MIT License 2 | 3 | Copyright (c) 2022 Cesar Mejia Valero 4 | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy 6 | of this software and associated documentation files (the "Software"), to deal 7 | in the Software without restriction, including without limitation the rights 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 9 | copies of the Software, and to permit persons to whom the Software is 10 | furnished to do so, subject to the following conditions: 11 | 12 | The above copyright notice and this permission notice shall be included in all 13 | copies or substantial portions of the Software. 14 | 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 21 | SOFTWARE. 22 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # SwiftUI-MVVM-CoreData-Async-Unit-Tests-Template 2 | This is the default Xcode SwiftUI Core Data Template updated with: MVVM Architecture, Concurrency (Async/await) and Unit-Tests 3 | --------------------------------------------------------------------------------