Testing building Flutter widget throws Exception
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 '18 at 6:55
S.D.S.D.
212113
add a comment |
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 '18 at 6:55
S.D.S.D.
212113
You probably want to throw on the constructor instead ofbuild.
– Rémi Rousselet
Nov 12 '18 at 7:13
add a comment |
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 '18 at 6:55
S.D.S.D.
212113
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 dart
flutter asked Nov 12 '18 at 6:55
S.D.S.D.
212113
asked Nov 12 '18 at 6:55
S.D.S.D.
212113
asked Nov 12 '18 at 6:55
S.D.S.D.
212113
asked Nov 12 '18 at 6:55
S.D.S.D.
212113
asked Nov 12 '18 at 6:55
S.D.S.D.
212113
212113
You probably want to throw on the constructor instead ofbuild.
– Rémi Rousselet
Nov 12 '18 at 7:13
add a comment |
You probably want to throw on the constructor instead ofbuild.
– Rémi Rousselet
Nov 12 '18 at 7:13
You probably want to throw on the constructor instead of
build.– Rémi Rousselet
Nov 12 '18 at 7:13
You probably want to throw on the constructor instead of
build.– Rémi Rousselet
Nov 12 '18 at 7:13
add a comment |
1 Answer
1
active
oldest
votes
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 '18 at 6:59
Günter ZöchbauerGünter Zöchbauer
316k66937882
add a comment |
Your Answer
StackExchange.ifUsing("editor", function ()
StackExchange.using("externalEditor", function ()
StackExchange.using("snippets", function ()
StackExchange.snippets.init();
);
);
, "code-snippets");
StackExchange.ready(function()
var channelOptions =
tags: "".split(" "),
id: "1"
;
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function()
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled)
StackExchange.using("snippets", function()
createEditor();
);
else
createEditor();
);
function createEditor()
StackExchange.prepareEditor(
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader:
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
,
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
);
);
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53257187%2ftesting-building-flutter-widget-throws-exception%23new-answer', 'question_page');
);
Post as a guest
Required, but never shown
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
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 '18 at 6:59
Günter ZöchbauerGünter Zöchbauer
316k66937882
add a comment |
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 '18 at 6:59
Günter ZöchbauerGünter Zöchbauer
316k66937882
add a comment |
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 '18 at 6:59
Günter ZöchbauerGünter Zöchbauer
316k66937882
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 '18 at 6:59
Günter ZöchbauerGünter Zöchbauer
316k66937882
answered Nov 12 '18 at 6:59
Günter ZöchbauerGünter Zöchbauer
316k66937882
answered Nov 12 '18 at 6:59
Günter ZöchbauerGünter Zöchbauer
316k66937882
answered Nov 12 '18 at 6:59
Günter ZöchbauerGünter Zöchbauer
316k66937882
316k66937882
add a comment |
add a comment |
Thanks for contributing an answer to Stack Overflow!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53257187%2ftesting-building-flutter-widget-throws-exception%23new-answer', 'question_page');
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
You probably want to throw on the constructor instead of
build.– Rémi Rousselet
Nov 12 '18 at 7:13