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Make sure that a CupertinoDesktopTextSelectionToolbarButton doesn't c… - #173894
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This pull request adds a regression test for an issue where CupertinoDesktopTextSelectionToolbarButton would crash when rendered in a zero-sized area. The added test correctly reproduces the scenario. My feedback focuses on improving the test's robustness by adding an assertion, as recommended by the Flutter testing guidelines.
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| await tester.pumpWidget( | ||
| const CupertinoApp( | ||
| home: SizedBox.shrink( | ||
| child: CupertinoDesktopTextSelectionToolbarButton(onPressed: null, child: Text('X')), | ||
| ), | ||
| ), | ||
| ); |
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While this test is great for catching crashes, it's missing an assertion. The Flutter testing guide states that every test should have at least one expect call.1 This ensures the test is actually verifying what it's supposed to and doesn't pass vacuously if the widget isn't rendered at all.
Adding a simple expect to check for the widget's presence would make this test more complete.
await tester.pumpWidget(
const CupertinoApp(
home: SizedBox.shrink(
child: CupertinoDesktopTextSelectionToolbarButton(onPressed: null, child: Text('X')),
),
),
);
expect(find.byType(CupertinoDesktopTextSelectionToolbarButton), findsOneWidget);
Style Guide References
Footnotes
-
Flutter Style Guide, line 10: Writing Effective Tests. ↩
justinmc
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Aug 20, 2025
Comment on lines
+134
to
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| await tester.pumpWidget( | ||
| const CupertinoApp( | ||
| home: SizedBox.shrink( | ||
| child: CupertinoDesktopTextSelectionToolbarButton(onPressed: null, child: Text('X')), | ||
| ), | ||
| ), | ||
| ); |
…rash in 0x0 environment
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Checklist:
- The test is in the correct file
- The test name goes “does not crash at zero area”
- The target widget is wrapped by
Center(or is fullscreen) - The target widget does not have an overlay, or the overlay is tested
- The target widget is expected to have a size of exactly
Size.zero
| ), | ||
| ), | ||
| ); | ||
| expect(tester.getSize(find.byType(CupertinoDesktopTextSelectionToolbarButton)).isEmpty, isTrue); |
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Suggested change
| expect(tester.getSize(find.byType(CupertinoDesktopTextSelectionToolbarButton)).isEmpty, isTrue); | |
| expect(tester.getSize(find.byType(CupertinoDesktopTextSelectionToolbarButton)), Size.zero); |
dkwingsmt
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Checklist:
- The test is in the correct file
- The test name goes “does not crash at zero area”
- The target widget is wrapped by
Center(or is fullscreen) - The target widget does not have an overlay, or the overlay is tested
- The target widget is expected to have a size of exactly
Size.zero
victorsanni
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Sep 22, 2025
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autosubmit label was removed for flutter/flutter/173894, because The base commit of the PR is older than 7 days and can not be merged. Please merge the latest changes from the main into this branch and resubmit the PR. |
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Roll Flutter from 6cc976e to 96fe3b3 (32 revisions) flutter/flutter@6cc976e...96fe3b3 2025-09-29 [email protected] Roll Packages from 389c678 to 34eec78 (6 revisions) (flutter/flutter#176205) 2025-09-29 [email protected] Roll Skia from 9b2b942d1eb1 to bb3b6bd4be0d (4 revisions) (flutter/flutter#176201) 2025-09-29 [email protected] [ Widget Preview ] Improve IDE integration support (flutter/flutter#176114) 2025-09-29 [email protected] Fix name of driver file (flutter/flutter#176186) 2025-09-29 [email protected] Roll Skia from beb673968802 to 9b2b942d1eb1 (3 revisions) (flutter/flutter#176190) 2025-09-28 [email protected] Roll Fuchsia Linux SDK from 0Z45OXT_Wb8aWI3a0... to 8zjcJic_DtvB2Bo2x... (flutter/flutter#176158) 2025-09-28 [email protected] Revert "[Impeller] Optimize scale translate rectangle transforms" (flutter/flutter#176161) 2025-09-27 [email protected] Roll Skia from 2e5da5c0a9cd to beb673968802 (1 revision) (flutter/flutter#176145) 2025-09-27 [email protected] [Impeller] Optimize scale translate rectangle transforms (flutter/flutter#176123) 2025-09-27 [email protected] Roll Skia from d8422aaf8f89 to 2e5da5c0a9cd (2 revisions) (flutter/flutter#176141) 2025-09-27 [email protected] [web] Remove mention of non-existent `canvaskit_lock.yaml` (flutter/flutter#176108) 2025-09-27 [email protected] Roll Skia from 96b73f61fe61 to d8422aaf8f89 (2 revisions) (flutter/flutter#176118) 2025-09-27 [email protected] [a11y] Add `expanded` flag support to Android. (flutter/flutter#174981) 2025-09-26 [email protected] Make sure that a DesktopTextSelectionToolbar doesn't crash in 0x0 env… (flutter/flutter#173928) 2025-09-26 [email protected] Roll Dart SDK from 899c7340cc4c to af31d2637b6b (11 revisions) (flutter/flutter#176056) 2025-09-26 [email protected] Update java version ranges with the top end limitation for java pre 17 (flutter/flutter#176049) 2025-09-26 [email protected] Add warn java evaluation to android_workflow (flutter/flutter#176097) 2025-09-26 [email protected] Removes type annotations in templates (flutter/flutter#176106) 2025-09-26 [email protected] Marks Linux_pixel_7pro static_path_stroke_tessellation_perf__timeline_summary to be unflaky (flutter/flutter#175917) 2025-09-26 [email protected] Add kotlin/kgp 2.2.* evaluation criteria. (flutter/flutter#176094) 2025-09-26 [email protected] Migrate to `WidgetStateMouseCursor` (flutter/flutter#175981) 2025-09-26 [email protected] Roll Packages from 117bf63 to 389c678 (4 revisions) (flutter/flutter#176092) 2025-09-26 [email protected] Fix link to .gclient setup instructions (flutter/flutter#176046) 2025-09-26 [email protected] Implement Regular Windows for the win32 framework + add an example application for regular windows (flutter/flutter#173715) 2025-09-26 [email protected] Roll Skia from 5d99c3fc7c83 to 96b73f61fe61 (3 revisions) (flutter/flutter#176075) 2025-09-26 [email protected] Roll Fuchsia Linux SDK from naeytagBIBEpKgZNZ... to 0Z45OXT_Wb8aWI3a0... (flutter/flutter#176068) 2025-09-26 [email protected] Add itemClipBehavior property for CarouselView's children (flutter/flutter#175324) 2025-09-26 [email protected] Roll Skia from 55436d87e414 to 5d99c3fc7c83 (4 revisions) (flutter/flutter#176060) 2025-09-26 [email protected] Revert "[Impeller] Optimize scale translate rectangle transforms" (flutter/flutter#176061) 2025-09-25 98614782+auto-submit[bot]@users.noreply.github.com Reverts "Reapply "Update the AccessibilityPlugin::Announce method to account f… (#174365)" (flutter/flutter#176059) 2025-09-25 [email protected] Make sure that a CupertinoDesktopTextSelectionToolbarButton doesn't c… (flutter/flutter#173894) 2025-09-25 [email protected] Improve code quality in `SensitiveContentPluginTest.java` (flutter/flutter#175721) If this roll has caused a breakage, revert this CL and stop the roller using the controls here: https://autoroll.skia.org/r/flutter-packages Please CC [email protected] on the revert to ensure that a human is aware of the problem. To file a bug in Packages: https://github.com/flutter/flutter/issues/new/choose To report a problem with the AutoRoller itself, please file a bug: https://issues.skia.org/issues/new?component=1389291&template=1850622 Documentation for the AutoRoller is here: https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md ...
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flutter#173894) This is my attempt to handle flutter#6537 for the CupertinoDesktopTextSelectionToolbarButton UI control. --------- Co-authored-by: Victor Sanni <[email protected]> Co-authored-by: Tong Mu <[email protected]>
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Roll Flutter from 6cc976e to 96fe3b3 (32 revisions) flutter/flutter@6cc976e...96fe3b3 2025-09-29 [email protected] Roll Packages from 389c678 to 34eec78 (6 revisions) (flutter/flutter#176205) 2025-09-29 [email protected] Roll Skia from 9b2b942d1eb1 to bb3b6bd4be0d (4 revisions) (flutter/flutter#176201) 2025-09-29 [email protected] [ Widget Preview ] Improve IDE integration support (flutter/flutter#176114) 2025-09-29 [email protected] Fix name of driver file (flutter/flutter#176186) 2025-09-29 [email protected] Roll Skia from beb673968802 to 9b2b942d1eb1 (3 revisions) (flutter/flutter#176190) 2025-09-28 [email protected] Roll Fuchsia Linux SDK from 0Z45OXT_Wb8aWI3a0... to 8zjcJic_DtvB2Bo2x... (flutter/flutter#176158) 2025-09-28 [email protected] Revert "[Impeller] Optimize scale translate rectangle transforms" (flutter/flutter#176161) 2025-09-27 [email protected] Roll Skia from 2e5da5c0a9cd to beb673968802 (1 revision) (flutter/flutter#176145) 2025-09-27 [email protected] [Impeller] Optimize scale translate rectangle transforms (flutter/flutter#176123) 2025-09-27 [email protected] Roll Skia from d8422aaf8f89 to 2e5da5c0a9cd (2 revisions) (flutter/flutter#176141) 2025-09-27 [email protected] [web] Remove mention of non-existent `canvaskit_lock.yaml` (flutter/flutter#176108) 2025-09-27 [email protected] Roll Skia from 96b73f61fe61 to d8422aaf8f89 (2 revisions) (flutter/flutter#176118) 2025-09-27 [email protected] [a11y] Add `expanded` flag support to Android. (flutter/flutter#174981) 2025-09-26 [email protected] Make sure that a DesktopTextSelectionToolbar doesn't crash in 0x0 env… (flutter/flutter#173928) 2025-09-26 [email protected] Roll Dart SDK from 899c7340cc4c to af31d2637b6b (11 revisions) (flutter/flutter#176056) 2025-09-26 [email protected] Update java version ranges with the top end limitation for java pre 17 (flutter/flutter#176049) 2025-09-26 [email protected] Add warn java evaluation to android_workflow (flutter/flutter#176097) 2025-09-26 [email protected] Removes type annotations in templates (flutter/flutter#176106) 2025-09-26 [email protected] Marks Linux_pixel_7pro static_path_stroke_tessellation_perf__timeline_summary to be unflaky (flutter/flutter#175917) 2025-09-26 [email protected] Add kotlin/kgp 2.2.* evaluation criteria. (flutter/flutter#176094) 2025-09-26 [email protected] Migrate to `WidgetStateMouseCursor` (flutter/flutter#175981) 2025-09-26 [email protected] Roll Packages from 117bf63 to 389c678 (4 revisions) (flutter/flutter#176092) 2025-09-26 [email protected] Fix link to .gclient setup instructions (flutter/flutter#176046) 2025-09-26 [email protected] Implement Regular Windows for the win32 framework + add an example application for regular windows (flutter/flutter#173715) 2025-09-26 [email protected] Roll Skia from 5d99c3fc7c83 to 96b73f61fe61 (3 revisions) (flutter/flutter#176075) 2025-09-26 [email protected] Roll Fuchsia Linux SDK from naeytagBIBEpKgZNZ... to 0Z45OXT_Wb8aWI3a0... (flutter/flutter#176068) 2025-09-26 [email protected] Add itemClipBehavior property for CarouselView's children (flutter/flutter#175324) 2025-09-26 [email protected] Roll Skia from 55436d87e414 to 5d99c3fc7c83 (4 revisions) (flutter/flutter#176060) 2025-09-26 [email protected] Revert "[Impeller] Optimize scale translate rectangle transforms" (flutter/flutter#176061) 2025-09-25 98614782+auto-submit[bot]@users.noreply.github.com Reverts "Reapply "Update the AccessibilityPlugin::Announce method to account f… (#174365)" (flutter/flutter#176059) 2025-09-25 [email protected] Make sure that a CupertinoDesktopTextSelectionToolbarButton doesn't c… (flutter/flutter#173894) 2025-09-25 [email protected] Improve code quality in `SensitiveContentPluginTest.java` (flutter/flutter#175721) If this roll has caused a breakage, revert this CL and stop the roller using the controls here: https://autoroll.skia.org/r/flutter-packages Please CC [email protected] on the revert to ensure that a human is aware of the problem. To file a bug in Packages: https://github.com/flutter/flutter/issues/new/choose To report a problem with the AutoRoller itself, please file a bug: https://issues.skia.org/issues/new?component=1389291&template=1850622 Documentation for the AutoRoller is here: https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md ...
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This is my attempt to handle #6537 for the CupertinoDesktopTextSelectionToolbarButton UI control.