Handle#6537 end drawer button #173026

ahmedsameha1 · 2025-07-31T04:59:33Z

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

gemini-code-assist

Code Review

This pull request refactors the tests for BackButton and CloseButton into logical groups, which improves organization. It also adds a new test for EndDrawerButton to address issue #6537. The review focuses on improving the new test to ensure it correctly validates the intended fix and is more readable.

gemini-code-assist · 2025-07-31T05:01:29Z

packages/flutter/test/material/back_button_test.dart

+  testWidgets('EndDrawerButton renders at zero area', (WidgetTester tester) async {
    await tester.pumpWidget(
      const MaterialApp(
-        home: Material(
-          child: CloseButton(
-            color: Colors.green,
-            style: ButtonStyle(iconColor: MaterialStatePropertyAll<Color>(Colors.red)),
-          ),
+        home: Center(
+          child: SizedBox.shrink(child: Scaffold(body: EndDrawerButton())),
        ),
      ),
    );
-
-    final RichText iconText = tester.firstWidget(
-      find.descendant(of: find.byType(CloseButton), matching: find.byType(RichText)),
-    );
-
-    expect(iconText.text.style!.color, Colors.red);
-  });
-
-  testWidgets('CloseButton onPressed overrides default pop behavior', (WidgetTester tester) async {
-    bool customCallbackWasCalled = false;
-    await tester.pumpWidget(
-      MaterialApp(
-        home: const Material(child: Text('Home')),
-        routes: <String, WidgetBuilder>{
-          '/next': (BuildContext context) {
-            return Material(
-              child: Center(child: CloseButton(onPressed: () => customCallbackWasCalled = true)),
-            );
-          },
-        },
-      ),
-    );
-
-    tester.state<NavigatorState>(find.byType(Navigator)).pushNamed('/next');
-
-    await tester.pumpAndSettle();
-    expect(find.text('Home'), findsNothing); // Start off on the second page.
-    expect(customCallbackWasCalled, false); // customCallbackWasCalled should still be false.
-    await tester.tap(find.byType(CloseButton));
-
-    await tester.pumpAndSettle();
-
-    // We're still on the second page.
-    expect(find.text('Home'), findsNothing);
-    // The custom callback is called, setting customCallbackWasCalled to true.
-    expect(customCallbackWasCalled, true);
+    final Finder endDrawerButtonIcon = find.byType(EndDrawerButtonIcon);
+    expect(tester.getSize(endDrawerButtonIcon).isEmpty, isTrue);
  });


The test for EndDrawerButton does not fully address issue #6537, which involves an exception when no Scaffold ancestor is present. The current test includes a Scaffold, so it doesn't cover the scenario described in the issue. The use of SizedBox.shrink also reduces readability.

Consider adding a test case that explicitly checks the behavior when no Scaffold is present. Also, for consistency with the other tests in this file, wrap the EndDrawerButton test in a group to keep tests logically organized.¹

group('EndDrawerButton', () { testWidgets('does not throw without a Scaffold ancestor', (WidgetTester tester) async { await tester.pumpWidget( const MaterialApp( // EndDrawerButton is not a descendant of a Scaffold. home: Material(child: EndDrawerButton()), ), ); // The test passes if it doesn't throw, and the button should not be visible. expect(find.byType(IconButton), findsNothing); }); });

Style Guide References

Footnotes

Class members (and by extension, tests in a file) should be ordered logically, for example by grouping related items. (link) ↩

dkwingsmt

LGTM

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

dkwingsmt · 2025-09-18T04:34:30Z

packages/flutter/test/material/back_button_test.dart

-  testWidgets('CloseButton.style.iconColor parameter overrides CloseButton.color', (
-    WidgetTester tester,
-  ) async {
+  testWidgets('EndDrawerButton renders at zero area', (WidgetTester tester) async {


Suggested change

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

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

dkwingsmt · 2025-09-18T04:35:18Z

packages/flutter/test/material/back_button_test.dart

+    final Finder endDrawerButtonIcon = find.byType(EndDrawerButtonIcon);
+    expect(tester.getSize(endDrawerButtonIcon).isEmpty, isTrue);


Suggested change

final Finder endDrawerButtonIcon = find.byType(EndDrawerButtonIcon);

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

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

flutter-dashboard · 2025-09-19T17:37:14Z

Golden file changes have been found for this pull request. Click here to view and triage (e.g. because this is an intentional change).

If you are still iterating on this change and are not ready to resolve the images on the Flutter Gold dashboard, consider marking this PR as a draft pull request above. You will still be able to view image results on the dashboard, commenting will be silenced, and the check will not try to resolve itself until marked ready for review.

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Reviewers: Read the Tree Hygiene page and make sure this patch meets those guidelines before LGTMing.

Changes reported for pull request #173026 at sha a49b12e

MitchellGoodwin

LGTM as well

MitchellGoodwin · 2025-10-08T17:23:02Z

@ahmedsameha1 I am unable to rebase through github, would you be able to rebase this PR so it can merge?

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

ahmedsameha1 added 2 commits July 31, 2025 07:50

Grouping BackButton and CloseButton tests

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Make sure that an EndDrawerButton doesn't crash in 0x0 environment

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github-actions bot added framework flutter/packages/flutter repository. See also f: labels. f: material design flutter/packages/flutter/material repository. labels Jul 31, 2025

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dkwingsmt requested review from MitchellGoodwin and dkwingsmt August 6, 2025 18:31

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ahmedsameha1 added 2 commits September 19, 2025 19:48

Merge branch 'master' into handle#6537-EndDrawerButton

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Using Size.zero instead of isEmpty

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Merge branch 'master' into handle#6537-EndDrawerButton

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Merge branch 'master' into handle#6537-EndDrawerButton

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Handle#6537 end drawer button (flutter#173026)

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

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

		final Finder endDrawerButtonIcon = find.byType(EndDrawerButtonIcon);
		expect(tester.getSize(endDrawerButtonIcon).isEmpty, isTrue);

	final Finder endDrawerButtonIcon = find.byType(EndDrawerButtonIcon);
	expect(tester.getSize(endDrawerButtonIcon).isEmpty, isTrue);
	expect(tester.getSize(find.byType(EndDrawerButton)), Size.zero);

Handle#6537 end drawer button #173026

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