| # Scenario App |
| |
| [](https://github.com/flutter/flutter/issues?q=is%3Aopen+is%3Aissue+label%3A%22e%3A+scenario-app%22) |
| |
| This package simulates a Flutter app that uses the engine (`dart:ui`) only, |
| in conjunction with iOS-specific embedding code that simulates the use of the |
| engine in a real app (such as plugins and platform views). |
| |
| [`run_ios_tests.sh`](run_ios_tests.sh) is used to run the tests on a simulator. |
| |
| See also: |
| |
| - [File an issue][file_issue] with the `e: scenario-app` label. |
| - [`lib/`](lib/), the Dart code and instrumentation for the scenario app. |
| - [`ios/`](ios/), the iOS-side native code and tests. |
| |
| [file_issue]: https://github.com/flutter/flutter/issues/new?labels=e:%20scenario-app,engine,team-ios |
| |
| ## Adding a New Scenario |
| |
| Create a new subclass of [Scenario](lib/src/scenario.dart) and add it to the map |
| in [scenarios.dart](lib/src/scenarios.dart). For an example, see |
| [animated_color_square.dart](lib/src/animated_color_square.dart), which draws a |
| continuously animating colored square that bounces off the sides of the |
| viewport. |
| |
| Then set the scenario from the iOS app by calling `set_scenario` on platform |
| channel `driver`. |
