Minimal Patrol/Xcode post-test diagnostics reproducer

diagnostic_collection_repro_test.dart

import 'package:patrol/patrol.dart';

void main() {
  for (var index = 1; index <= 61; index++) {
    patrolTest('long suite test $index', ($) async {
      await Future<void>.delayed(const Duration(seconds: 10));
    });
  }
}

patrol-ios-diagnostics-repro.md

Patrol / Xcode post-test diagnostics reproducer

This uses Patrol's own example app and contains no application-specific code.

Environment verified:

• Patrol master ede803499
• Patrol CLI master ede803499
• Flutter 3.47.0 / Dart 3.13.0
• Xcode 26.6 on macOS 26.6.1
• iPad (A16) simulator on iOS 26.5

Copy diagnostic_collection_repro_test.dart into packages/patrol/example/patrol_test/, then run from packages/patrol/example:

dart run ../../patrol_cli/bin/main.dart \
  --flutter-command=/path/to/flutter/3.47/bin/flutter \
  test \
  --device=<ios-simulator-uuid> \
  --target=patrol_test/diagnostic_collection_repro_test.dart \
  --verbose

Verified result with Xcode's default diagnostic policy:

1. All 61 XCTest cases pass in 954 seconds.

2. The command does not return after the passing suite.

3. xcodebuild starts:

   simctl diagnose -l -b --timeout=600 ...
   

4. The post-test diagnostic phase lasts up to another 10 minutes.

The same generated .xctestrun has DiagnosticCollectionPolicy = 1. Setting it to 0 (Never) before xcodebuild test-without-building prevents the diagnostic phase.