How do I design for dependency injection with StoreKit 2 in Swift?

When designing for dependency injection with StoreKit 2 in Swift, it's essential to separate your business logic from the StoreKit logic. This enables better testing, flexibility, and easier management of dependencies.

Here's a simple example of how to implement dependency injection for StoreKit in Swift:


        // Define a protocol for StoreKit operations
        protocol StoreKitService {
            func fetchProducts() async throws -> [Product]
            func purchase(product: Product) async throws -> PurchaseResult
        }

        // Create a concrete implementation of StoreKitService
        class StoreKitManager: StoreKitService {
            func fetchProducts() async throws -> [Product] {
                // Usage of StoreKit 2 to fetch products
                let products = try await Product.products(for: ["your_product_id"])
                return products
            }

            func purchase(product: Product) async throws -> PurchaseResult {
                let result = try await product.purchase()
                return result
            }
        }

        // ViewModel that uses dependency injection
        class StoreViewModel: ObservableObject {
            private let storeKitService: StoreKitService
            @Published var products: [Product] = []

            init(storeKitService: StoreKitService) {
                self.storeKitService = storeKitService
                Task {
                    await loadProducts()
                }
            }

            func loadProducts() async {
                do {
                    products = try await storeKitService.fetchProducts()
                } catch {
                    // Handle error
                }
            }

            func buy(product: Product) async {
                do {
                    let result = try await storeKitService.purchase(product: product)
                    // Handle purchase result
                } catch {
                    // Handle error
                }
            }
        }

StoreKit Dependency Injection Swift StoreKit 2 Testing Software Design

How do I design for dependency injection with StoreKit 2 in Swift?

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How do I design for dependency injection with StoreKit 2 in Swift?

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