Table of Contents
- 事象
- 解決方法
事象
FlutterでIntegration Test内でのスクリーンショット撮影が、iOSでのみ以下のようなエラーで失敗する。
Failure in method: screenshot
══╡ EXCEPTION CAUGHT BY FLUTTER TEST FRAMEWORK ╞═════════════════
The following MissingPluginException was thrown running a test:
MissingPluginException(No implementation found for method
captureScreenshot on channel plugins.flutter.io/integration_test)
When the exception was thrown, this was the stack:
#0 MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:294:7)
<asynchronous suspension>
#1 IOCallbackManager.takeScreenshot (package:integration_test/_callback_io.dart:94:33)
<asynchronous suspension>
#2 IntegrationTestWidgetsFlutterBinding.takeScreenshot (package:integration_test/integration_test.dart:190:39)
<asynchronous suspension>
#3 takeScreenshot (file:///Users/chika/StudioProjects/submon/integration_test/screenshot_test.dart:57:3)
<asynchronous suspension>
#4 main.<anonymous closure> (file:///Users/chika/StudioProjects/submon/integration_test/screenshot_test.dart:26:5)
<asynchronous suspension>
#5 testWidgets.<anonymous closure>.<anonymous closure> (package:flutter_test/src/widget_tester.dart:171:15)
<asynchronous suspension>
#6 TestWidgetsFlutterBinding._runTestBody (package:flutter_test/src/binding.dart:841:5)
<asynchronous suspension>
The test description was:
screenshot
═════════════════════════════════════════════════════════════════
これは以下のIssueでも議論されているが、未だにCloseされていない。
[integration_test] Plugin not registered unless running via XCTest #91668
解決方法
以下のページを参考にした。
Grabs screenshots from your Flutter app on multiple platforms (iOS and Android)
flutter(Flutter SDKのフォルダー)/packages/integration_test/ios/Classes/IntegrationTestPlugin.mを開き、registerWithRegistrarメソッドの内容を以下のように書き換える。
+ (void)registerWithRegistrar:(NSObject<FlutterPluginRegistrar> *)registrar {
// No initialization happens here because of the way XCTest loads the testing
// bundles. Setup on static variables can be disregarded when a new static
// instance of IntegrationTestPlugin is allocated when the bundle is reloaded.
// See also: https://github.com/flutter/plugins/pull/2465
[[IntegrationTestPlugin instance] setupChannels:registrar.messenger]; // 追加
}
そのままビルドして実行すると、撮影が可能になる。