Make sure that a CheckboxListTile doesn't crash in 0x0 environment #173151

ahmedsameha1 · 2025-08-02T04:04:44Z

This is my attempt to handle #6537 for the CheckboxListTile UI control.

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Code Review

This PR adds a regression test for a crash in CheckboxListTile when rendered in a zero-sized area. The test is a good addition, but the PR seems to be missing the actual code fix for the crash it's testing against. Merging this as-is could introduce a failing test. I've suggested a more descriptive name for the test to improve clarity, in line with our style guide's emphasis on readability. The test's widget tree can be simplified by removing a redundant Center widget, following the 'write what you need and no more' principle. I've referenced the Flutter Style Guide where applicable in my comments.

packages/flutter/test/material/checkbox_list_tile_test.dart

dkwingsmt

LGTM

MitchellGoodwin

LGTM as well!

dkwingsmt

Some changes per the latest discussion

dkwingsmt · 2025-09-03T17:41:57Z

packages/flutter/test/material/checkbox_list_tile_test.dart

    expect(secondaryOffset.dy - tileOffset.dy, bottomPositionSecondary);
  });
+
+  testWidgets('CheckboxListTile renders at zero area', (WidgetTester tester) async {


Suggested change

testWidgets('CheckboxListTile renders at zero area', (WidgetTester tester) async {

testWidgets('CheckboxListTile does not crash at zero area', (WidgetTester tester) async {

dkwingsmt · 2025-09-03T17:42:39Z

packages/flutter/test/material/checkbox_list_tile_test.dart

+    final Finder xText = find.text('X');
+    expect(tester.getSize(xText).isEmpty, isTrue);


Suggested change

final Finder xText = find.text('X');

expect(tester.getSize(xText).isEmpty, isTrue);

expect(tester.getSize(find.byType(CheckboxListTile)), Size.zero);

dkwingsmt

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

auto-submit · 2025-09-18T05:14:06Z

autosubmit label was removed for flutter/flutter/173151, because - The status or check suite Mac_x64 tool_tests_commands has failed. Please fix the issues identified (or deflake) before re-applying this label.

auto-submit · 2025-09-23T20:31:51Z

autosubmit label was removed for flutter/flutter/173151, because - The status or check suite Google testing has failed. Please fix the issues identified (or deflake) before re-applying this label.

auto-submit · 2025-10-01T18:29:15Z

autosubmit label was removed for flutter/flutter/173151, because - The status or check suite Google testing has failed. Please fix the issues identified (or deflake) before re-applying this label.

auto-submit · 2025-10-08T18:23:38Z

autosubmit label was removed for flutter/flutter/173151, because - The status or check suite Google testing has failed. Please fix the issues identified (or deflake) before re-applying this label.

auto-submit · 2025-10-16T21:50:50Z

autosubmit label was removed for flutter/flutter/173151, because - The status or check suite Google testing has failed. Please fix the issues identified (or deflake) before re-applying this label.

auto-submit · 2025-11-02T19:24:29Z

autosubmit label was removed for flutter/flutter/173151, because - The status or check suite Linux web_long_running_tests_3_5 has failed. Please fix the issues identified (or deflake) before re-applying this label.

…ronment (flutter/flutter#173151)

…lutter#173151) This is my attempt to handle flutter#6537 for the CheckboxListTile UI control. Co-authored-by: Tong Mu <[email protected]>

github-actions bot added framework flutter/packages/flutter repository. See also f: labels. f: material design flutter/packages/flutter/material repository. labels Aug 2, 2025

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dkwingsmt requested review from MitchellGoodwin and dkwingsmt August 6, 2025 18:34

dkwingsmt approved these changes Aug 8, 2025

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dkwingsmt self-requested a review August 27, 2025 18:23

MitchellGoodwin approved these changes Sep 3, 2025

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ahmedsameha1 force-pushed the handle#6537-CheckboxListTile branch from 8f7dac0 to 5635d14 Compare September 4, 2025 09:41

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dkwingsmt force-pushed the handle#6537-CheckboxListTile branch from b0400a6 to 0481794 Compare October 8, 2025 23:21

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Make sure that a CheckboxListTile doesn't crash in 0x0 environment

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dkwingsmt force-pushed the handle#6537-CheckboxListTile branch from 0481794 to 5859547 Compare October 16, 2025 21:49

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Merge branch 'master' into handle#6537-CheckboxListTile

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Merged via the queue into flutter:master with commit 604bc86 Nov 2, 2025
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	testWidgets('CheckboxListTile renders at zero area', (WidgetTester tester) async {
	testWidgets('CheckboxListTile does not crash at zero area', (WidgetTester tester) async {

		final Finder xText = find.text('X');
		expect(tester.getSize(xText).isEmpty, isTrue);

	final Finder xText = find.text('X');
	expect(tester.getSize(xText).isEmpty, isTrue);
	expect(tester.getSize(find.byType(CheckboxListTile)), Size.zero);

Make sure that a CheckboxListTile doesn't crash in 0x0 environment #173151

Make sure that a CheckboxListTile doesn't crash in 0x0 environment #173151

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ahmedsameha1 commented Aug 2, 2025

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