[Xcode 27] in_app_purchase_storekit StoreKit 2 native tests fail on the iOS 27 simulator #194285

in_app_purchase_storekit's native tests fail when run on the iOS 27.0 simulator with Xcode 27 (27a266a), so Mac_arm64 ios_platform_tests fails at native test for this package:

https://ci.chromium.org/b/8668086845504323249 (staging.shadow led replay, shard 3; log: https://logs.chromium.org/logs/flutter/buildbucket/cr-buildbucket/8668086845504323249/+/u/Run_package_tests/native_test/stdout)

The example app launches fine (it already has a scene manifest) and the StoreKit 1 tests pass, but InAppPurchase2PluginTests reports Executed 28 tests, with 16 tests skipped and 9 failures and then the run crashes:

RunnerTests/StoreKit2TranslatorTests.swift:69: Fatal error: Unexpectedly found nil while unwrapping an Optional value

Failing methods: testGetProducts, testGetDiscountedProducts (XCTAssertNotNil failed), testGetProductsWithStoreKitError, testFinishTransactionSucceedsWhenAlreadyFinished, testIsWinBackOfferEligibleNotEligible, testIsWinBackOfferEligibleNonSubscription, plus timeouts on the async waits. The log has

<SKPaymentQueue: 0x…>: Error in remote proxy while checking server queue: StoreKit.StoreKitServiceError(error: StoreKit.StoreKitServiceError.ErrorType.system(StoreKit.StoreKitInternalError.noAccount), environment: Optional("Sandbox"), …

so it looks like the StoreKit Testing configuration (Configuration.storekit) is not returning products on the iOS 27 simulator — every failure is downstream of Product.products(for:) coming back empty, and the translator test force-unwraps the first product. Not reproduced on iOS 26.2 (the same tests pass on the current bots). The earlier Xcode 27 runs behind #194019 never reached native test, so this is the first datapoint for this package.

Related: #194019