What’s new in StoreKit 2 and StoreKit Testing in Xcode

// Create a listener for promoted in-app purchases
import StoreKit

let promotedPurchasesListener = Task {
    for await promotion in PurchaseIntent.intents {
        // Process promotion
        let product = promotion.product

        // Purchase promoted product
        do {
            let result = try await product.purchase()
            // Process result
        }
        catch {
            // Handle error
        }
    }
}

// Check promotion order
import StoreKit

do {
    let promotions = try await Product.PromotionInfo.currentOrder

    if promotions.isEmpty {
        // No local promotion order set
    }

    for promotion in promotions {
        let productID = promotion.productID
        let productVisibility = promotion.visibility
        // Check promoted products
    }
}
catch {
    // Handle error
}

// Set a promotion order
import StoreKit

let newPromotionOrder: [String] = [
    "acorns.individual",
    "nectar.cup",
    "sunflowerseeds.pile"
]

do {
    try await Product.PromotionInfo.updateProductOrder(byID: newPromotionOrder)
}
catch {
    // Handle error
}

// Update promotion visibility
import StoreKit

// Hide “acorns.individual”
do {
    try await Product.PromotionInfo.updateProductVisibility(.hidden, for: "acorns.individual")
}
catch {
    // Handle error
}

// Update promotion visibility
import StoreKit

do {
  let promotions = try await Product.PromotionInfo.currentOrder

  // Hide the first product
  if var firstPromotion = promotions.first {
    firstPromotion.visibility = .hidden
    try await firstPromotion.update()
  }
}
catch {
  // Handle error
}

// Product view
import SwiftUI
import StoreKit

struct BirdFoodShop: View {
    let productID: String
    let productImage: String

    var body: some View {
        ProductView(id: productID) {
            BirdFoodProductIcon(for: productID)
        }
        .productViewStyle(.large)
    }
}

// Store view
import SwiftUI
import StoreKit

struct BirdFoodShop: View {
    let productIDs: [String]

    var body: some View {
        StoreView(ids: productIDs) { product in
            BirdFoodIcon(productID: product.id)
        }
    }
}

// Subscription view
import SwiftUI
import StoreKit

struct BackyardBirdsPassShop: View {
    let groupID: String

    var body: some View {
        SubscriptionStoreView(groupID: groupID)
    }
}

// Simulated off-device purchase using StoreKitTest
import StoreKit
import StoreKitTest

func testSubscriptionRenewal() async throws {
    let session = try SKTestSession(configurationFileNamed: "Store")

    let oneYearInterval: TimeInterval = (365 * 24 * 60 * 60)
    let transaction = try await session.buyProduct(
        identifier: "birdpass.individual",
        options: [
            .purchaseDate(Date.now - oneYearInterval)
        ]
    )

    // Inspect transaction
}

// Set a simulated purchase error when loading products
import StoreKit
import StoreKitTest

func testLoadProducts() async throws {
    let session = try SKTestSession(configurationFileNamed: "Store")
    let productIDs = [
        "acorns.individual",
        "nectar.cup"
    ]

    // Set a simulated error, then load products, expecting an error
    session.setSimulatedError(.generic(.networkError), forAPI: .loadProducts)
    do {
        _ = try await Product.products(for: productIDs)
        XCTFail("Expected a network error")
    }
    catch StoreKitError.networkError(_) {
        // Expected error thrown, continue...
    }
    // Disable simulated error
    session.setSimulatedError(nil, forAPI: .loadProducts)
}

// Set a faster subscription renewal rate in a test session
import StoreKit
import StoreKitTest

func testSubscriptionRenewal() async throws {
    let session = try SKTestSession(configurationFileNamed: "Store")

    // Set renewals to expire every minute
    session.timeRate = .oneRenewalEveryMinute

    let transaction = try await session.buyProduct(identifier: "birdpass.individual")

    // Wait for renewals and inspect transactions
}