unhandled exception - command failed

[LSambo02]

Process stops while installing application on the target device (Nexus 6P)

Running Gradle task 'assembleDebug'...                            239.2s
✓ Built build/app/outputs/flutter-apk/app-debug.apk.
Installing build/app/outputs/flutter-apk/app.apk...                 3.5s
../../Library/Android/sdk/flutter/packages/flutter_test/lib/src/_goldens_io.dart:9:8: Error: Not found: 'dart:ui'
import 'dart:ui';
       ^
../../Library/Android/sdk/flutter/packages/flutter_test/lib/src/accessibility.dart:8:8: Error: Not found: 'dart:ui'
import 'dart:ui' as ui;
       ^
../../Library/Android/sdk/flutter/packages/flutter_test/lib/src/animation_sheet.dart:6:8: Error: Not found: 'dart:ui'
import 'dart:ui' as ui;
       ^
../../Library/Android/sdk/flutter/packages/flutter_test/lib/src/binding.dart:7:8: Error: Not found: 'dart:ui'
import 'dart:ui' as ui;
       ^
../../Library/Android/sdk/flutter/packages/flutter_test/lib/src/frame_timing_summarizer.dart:5:8: Error: Not found: 'dart:ui'
import 'dart:ui';
       ^
../../Library/Android/sdk/flutter/packages/flutter_test/lib/src/image.dart:7:8: Error: Not found: 'dart:ui'
import 'dart:ui' as ui;
       ^
../../Library/Android/sdk/flutter/packages/flutter_test/lib/src/matchers.dart:7:8: Error: Not found: 'dart:ui'
import 'dart:ui' as ui;
       ^
../../Library/Android/sdk/flutter/packages/flutter_test/lib/src/matchers.dart:8:8: Error: Not found: 'dart:ui'
import 'dart:ui';
       ^
../../Library/Android/sdk/flutter/packages/flutter_test/lib/src/test_pointer.dart:10:1: Error: Not found: 'dart:ui'
export 'dart:ui' show Offset;
^
../../Library/Android/sdk/flutter/packages/flutter_test/lib/src/window.dart:6:8: Error: Not found: 'dart:ui'
import 'dart:ui' as ui hide window;
       ^
Unhandled exception:
command failed: exitcode=1, cmd='flutter -d emulator-5554 drive lib/main.dart', workingDirectory=., mode=normal
#0      streamCmd (package:screenshots/src/utils.dart:405:7)
<asynchronous suspension>
#1      Screenshots.runProcessTests (package:screenshots/src/run.dart:403:7)
<asynchronous suspension>
#2      Screenshots.runTestsOnAll (package:screenshots/src/run.dart:353:11)
<asynchronous suspension>
#3      Screenshots.run (package:screenshots/src/run.dart:127:5)
<asynchronous suspension>
#4      AppContext.run.<anonymous closure> (package:tool_base/src/base/context.dart:154:19)
<asynchronous suspension>
#5      AppContext.run (package:tool_base/src/base/context.dart:153:12)
<asynchronous suspension>
#6      runInContext (package:screenshots/src/context_runner.dart:16:10)
<asynchronous suspension>
#7      main (file:///Users/igorlsambo/.pub-cache/hosted/pub.dartlang.org/screenshots-2.1.1/bin/main.dart:122:19)
<asynchronous suspension> 

[hansbak]

If I remember well, the dart test should only have the following import statements:

import 'package:flutter_driver/flutter_driver.dart';
import 'package:test/test.dart';
import 'package:screenshots/screenshots.dart';

NOT more because they are causing the UI errors....

[LSambo02]

My test is like this and using the screenshots as a executable

import 'package:flutter_test/flutter_test.dart';
import 'package:my_app/main.dart' as app;

void main() {
  testWidgets('simple test', (WidgetTester tester) async {
    // Build our app and trigger a frame.
    await tester.pumpWidget(app.MyApp());
  });
}

What would it be the flutter_driver.dart for?

[hansbak]

i use the integration tests as described in: https://flutter.dev/docs/testing/integration-tests

[LSambo02]

Thanks, I'll be reading and test it out

[hansbak]

Please do, also use the flutter channel beta.....i could not get this working with the channel stable.

[LSambo02]

Noted

[hansbak]

now i remember more, use also this fork: https://github.com/felixgabler/screenshots ....