Testing building Flutter widget throws Exception
up vote
1
down vote
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Is there a way to test for building a widget throwing an exception.
I tried this in testWidgets but it doesn't recognize the error.
expectLater(() async {
await tester.pumpWidget(...);
}, throwsException);
dart 
flutter asked Nov 12 at 6:55
S.D.
228112
add a comment |
up vote
1
down vote
favorite
Is there a way to test for building a widget throwing an exception.
I tried this in testWidgets but it doesn't recognize the error.
expectLater(() async {
await tester.pumpWidget(...);
}, throwsException);
asked Nov 12 at 6:55
S.D.
228112
You probably want to throw on the constructor instead ofbuild.
– Rémi Rousselet
Nov 12 at 7:13
add a comment |
up vote
1
down vote
favorite
up vote
1
down vote
favorite
Is there a way to test for building a widget throwing an exception.
I tried this in testWidgets but it doesn't recognize the error.
expectLater(() async {
await tester.pumpWidget(...);
}, throwsException);
asked Nov 12 at 6:55
S.D.
228112
Is there a way to test for building a widget throwing an exception.
I tried this in testWidgets but it doesn't recognize the error.
expectLater(() async {
await tester.pumpWidget(...);
}, throwsException);
asked Nov 12 at 6:55
S.D.
228112
asked Nov 12 at 6:55
S.D.
228112
asked Nov 12 at 6:55
S.D.
228112
asked Nov 12 at 6:55
S.D.
228112
asked Nov 12 at 6:55
S.D.
228112
228112
You probably want to throw on the constructor instead ofbuild.
– Rémi Rousselet
Nov 12 at 7:13
add a comment |
You probably want to throw on the constructor instead ofbuild.
– Rémi Rousselet
Nov 12 at 7:13
You probably want to throw on the constructor instead of
build.– Rémi Rousselet
Nov 12 at 7:13
You probably want to throw on the constructor instead of
build.– Rémi Rousselet
Nov 12 at 7:13
add a comment |
1 Answer
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1
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You can only catch exceptions thrown by code invoked by your code.build() is invoked by the Flutter framework and therefore errors land there.
You can register a custom error handler for such exceptions in your test
final errorHandled = expectAsync0((){});
FlutterError.onError = (errorDetails) {
// handle error
errorHandled();
});
This way the test will fail if errorHandled isn't called before the test times out.
https://docs.flutter.io/flutter/foundation/FlutterError-class.html
answered Nov 12 at 6:59
Günter Zöchbauer
310k64919864
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
1
down vote
accepted
You can only catch exceptions thrown by code invoked by your code.build() is invoked by the Flutter framework and therefore errors land there.
You can register a custom error handler for such exceptions in your test
final errorHandled = expectAsync0((){});
FlutterError.onError = (errorDetails) {
// handle error
errorHandled();
});
This way the test will fail if errorHandled isn't called before the test times out.
https://docs.flutter.io/flutter/foundation/FlutterError-class.html
answered Nov 12 at 6:59
Günter Zöchbauer
310k64919864
add a comment |
up vote
1
down vote
accepted
You can only catch exceptions thrown by code invoked by your code.build() is invoked by the Flutter framework and therefore errors land there.
You can register a custom error handler for such exceptions in your test
final errorHandled = expectAsync0((){});
FlutterError.onError = (errorDetails) {
// handle error
errorHandled();
});
This way the test will fail if errorHandled isn't called before the test times out.
https://docs.flutter.io/flutter/foundation/FlutterError-class.html
answered Nov 12 at 6:59
Günter Zöchbauer
310k64919864
add a comment |
up vote
1
down vote
accepted
up vote
1
down vote
accepted
You can only catch exceptions thrown by code invoked by your code.build() is invoked by the Flutter framework and therefore errors land there.
You can register a custom error handler for such exceptions in your test
final errorHandled = expectAsync0((){});
FlutterError.onError = (errorDetails) {
// handle error
errorHandled();
});
This way the test will fail if errorHandled isn't called before the test times out.
https://docs.flutter.io/flutter/foundation/FlutterError-class.html
answered Nov 12 at 6:59
Günter Zöchbauer
310k64919864
You can only catch exceptions thrown by code invoked by your code.build() is invoked by the Flutter framework and therefore errors land there.
You can register a custom error handler for such exceptions in your test
final errorHandled = expectAsync0((){});
FlutterError.onError = (errorDetails) {
// handle error
errorHandled();
});
This way the test will fail if errorHandled isn't called before the test times out.
https://docs.flutter.io/flutter/foundation/FlutterError-class.html
answered Nov 12 at 6:59
Günter Zöchbauer
310k64919864
answered Nov 12 at 6:59
Günter Zöchbauer
310k64919864
answered Nov 12 at 6:59
Günter Zöchbauer
310k64919864
answered Nov 12 at 6:59
Günter Zöchbauer
310k64919864
310k64919864
add a comment |
add a comment |
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You probably want to throw on the constructor instead of
build.– Rémi Rousselet
Nov 12 at 7:13