Running "flutter run" for a widget test has inconsistent MediaQuery.of(context).size

[etiennedm]

Steps to Reproduce

1. Clone https://gitlab.com/etiennedm/flutter-test-issue.git
2. Run app, tap button, it will show "Screen size is XxY"
3. Run test with flutter run test/widget_test.dart, it will output the same screen size. Moreover now the bottom squares are not showing.

So the issue is that when running a test with flutter run it seems like a MediaQuery.of(context).size is returning the actual size as seen by the test environment and not by the running widget. Is that the expected behavior?

[✓] Flutter (Channel dev, v0.8.1, on Linux, locale en_US.UTF-8)
    • Flutter version 0.8.1 at /home/edemaricourt/dev/perso/flutter/flutter
    • Framework revision 0235ec59d1 (5 days ago), 2018-09-06 20:23:13 -0700
    • Engine revision 9b297b3b51
    • Dart version 2.1.0-dev.3.1.flutter-760a9690c2

[✓] Android toolchain - develop for Android devices (Android SDK 28.0.1)
    • Android SDK at /home/edemaricourt/Android/Sdk
    • Android NDK at /home/edemaricourt/Android/Sdk/ndk-bundle
    • Platform android-28, build-tools 28.0.1
    • ANDROID_HOME = /home/edemaricourt/Android/Sdk
    • Java binary at: /home/edemaricourt/software/android-studio/jre/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1024-b01)
    • All Android licenses accepted.

[✓] Android Studio (version 3.1)
    • Android Studio at /home/edemaricourt/software/android-studio
    • Flutter plugin version 26.0.1
    • Dart plugin version 173.4700
    • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1024-b01)

[✓] VS Code (version 1.27.1)
    • VS Code at /usr/share/code
    • Flutter extension version 2.18.0

[✓] Connected devices (1 available)
    • Android SDK built for x86 • emulator-5554 • android-x86 • Android 7.1.1 (API 25) (emulator)

• No issues found!

[zoechi]

I think flutter/website#7795 is related
#19181

[etiennedm]

@zoechi thank you for pointing to these issues. I was able to use a workaround suggested in #19181:

final TestViewConfiguration viewConfig = TestViewConfiguration(size: const Size(411.4, 683.4));
WidgetsBinding.instance.renderView.configuration = viewConfig;

Where the size was found by printing out the MediaQuery data in the app (which makes it device specific). Not ideal, but much better!

[zoechi]

Duplicate of #12994

[github-actions]

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