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avatar: Show placeholder on image load error #1882

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71ae691
refactor(test): Use helper for finding elements in UserTile
vinodsingh-dev-gsoc Nov 4, 2025
7171d71
avatar: Show placeholder on image load error.
vinodsingh-dev-gsoc Nov 4, 2025
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5 changes: 3 additions & 2 deletions lib/widgets/user.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -66,7 +66,7 @@ class AvatarImage extends StatelessWidget {
final user = store.getUser(userId);

if (user == null) { // TODO(log)
return const SizedBox.shrink();
return _AvatarPlaceholder(size: size);
}

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@chrisbobbe chrisbobbe Nov 3, 2025

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nit: keep this blank line, separating unrelated stanzas of code

if (replaceIfMuted && store.isUserMuted(userId)) {
Expand All @@ -79,7 +79,7 @@ class AvatarImage extends StatelessWidget {
};

if (resolvedUrl == null) {
return const SizedBox.shrink();
return _AvatarPlaceholder(size: size);
}

final avatarUrl = AvatarUrl.fromUserData(resolvedUrl: resolvedUrl);
Expand All @@ -89,6 +89,7 @@ class AvatarImage extends StatelessWidget {
avatarUrl.get(physicalSize),
filterQuality: FilterQuality.medium,
fit: BoxFit.cover,
errorBuilder: (_, _, _) => _AvatarPlaceholder(size: size),
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@chrisbobbe chrisbobbe Oct 23, 2025

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Please also change the resolvedUrl == null case to return _AvatarPlaceholder, too, for this part of the issue description in #1558:

because the URL is invalid

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@chrisbobbe chrisbobbe Oct 23, 2025

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and add a test for that.

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@chrisbobbe chrisbobbe Oct 23, 2025

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Same for the user == null case above that, for this part of the issue description:

Or, pre-#1556, for a message from an unknown sender

);
}
}
Expand Down
15 changes: 11 additions & 4 deletions test/test_images.dart
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Original file line number Diff line number Diff line change
@@ -1,5 +1,6 @@
import 'dart:async';
import 'dart:io';
import 'dart:typed_data';

import 'package:flutter/widgets.dart';
import 'package:flutter_test/flutter_test.dart';
Expand All @@ -12,12 +13,18 @@ import 'package:flutter_test/flutter_test.dart';
/// before the end of the test.
// TODO(upstream) simplify callers by using addTearDown: https://github.com/flutter/flutter/issues/123189
// See also: https://github.com/flutter/flutter/issues/121917
FakeImageHttpClient prepareBoringImageHttpClient() {
FakeImageHttpClient prepareBoringImageHttpClient({bool success = true}) {
final httpClient = FakeImageHttpClient();
debugNetworkImageHttpClientProvider = () => httpClient;
httpClient.request.response
..statusCode = HttpStatus.ok
..content = kSolidBlueAvatar;
if (success) {
httpClient.request.response
..statusCode = HttpStatus.ok
..content = kSolidBlueAvatar;
} else {
httpClient.request.response
..statusCode = HttpStatus.notFound
..content = Uint8List(0);
}
return httpClient;
}

Expand Down
24 changes: 12 additions & 12 deletions test/widgets/new_dm_sheet_test.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -254,19 +254,19 @@ void main() {
});

group('user selection', () {
void checkUserSelected(WidgetTester tester, User user, bool expected) {
final icon = tester.widget<Icon>(find.descendant(
of: findUserTile(user),
matching: find.byType(Icon)));

if (expected) {
check(findUserChip(user)).findsOne();
check(icon).icon.equals(ZulipIcons.check_circle_checked);
} else {
check(findUserChip(user)).findsNothing();
check(icon).icon.equals(ZulipIcons.check_circle_unchecked);
Finder findInUserTile(User user, Finder finder) => find.descendant(of: findUserTile(user), matching: finder);

void checkUserSelected(WidgetTester tester, User user, bool expected) {
if (expected) {
check(findUserChip(user)).findsOne();
check(findInUserTile(user,find.byIcon(ZulipIcons.check_circle_checked))).findsOne();
check(findInUserTile(user,find.byIcon(ZulipIcons.check_circle_unchecked))).findsNothing();
} else {
check(findUserChip(user)).findsNothing();
check(findInUserTile(user,find.byIcon(ZulipIcons.check_circle_unchecked))).findsOne();
check(findInUserTile(user,find.byIcon(ZulipIcons.check_circle_checked))).findsNothing();
}
}
}

testWidgets('tapping user chip deselects the user', (tester) async {
await setupSheet(tester, users: [eg.otherUser, eg.thirdUser]);
Expand Down
81 changes: 75 additions & 6 deletions test/widgets/user_test.dart
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Original file line number Diff line number Diff line change
@@ -1,18 +1,17 @@
import 'package:checks/checks.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter/rendering.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:zulip/model/store.dart';
import 'package:zulip/widgets/image.dart';
import 'package:zulip/widgets/store.dart';
import 'package:zulip/widgets/icons.dart';
import 'package:zulip/widgets/user.dart';

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@chrisbobbe chrisbobbe Nov 3, 2025

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nit: keep this blank line, which separates third-party imports from first-party imports

import '../example_data.dart' as eg;
import '../model/binding.dart';
import '../model/test_store.dart';
import '../stdlib_checks.dart';
import '../test_images.dart';
import 'test_app.dart';

void main() {
TestZulipBinding.ensureInitialized();
Expand All @@ -28,9 +27,12 @@ void main() {
await store.addUser(user);

prepareBoringImageHttpClient();
await tester.pumpWidget(GlobalStoreWidget(
child: PerAccountStoreWidget(accountId: eg.selfAccount.id,
child: AvatarImage(userId: user.userId, size: size ?? 30))));
await tester.pumpWidget(
TestZulipApp(
accountId: eg.selfAccount.id,
child: AvatarImage(userId: user.userId, size: size ?? 30),
)
);
await tester.pump();
await tester.pump();
tester.widget(find.byType(AvatarImage));
Expand Down Expand Up @@ -78,5 +80,72 @@ void main() {
check(await actualUrl(tester, avatarUrl)).isNull();
debugNetworkImageHttpClientProvider = null;
});

testWidgets('shows placeholder when image URL gives error', (WidgetTester tester) async {
addTearDown(testBinding.reset);
prepareBoringImageHttpClient(success: false);
await testBinding.globalStore.add(eg.selfAccount, eg.initialSnapshot());
final store = await testBinding.globalStore.perAccount(eg.selfAccount.id);
final badUser = eg.user(avatarUrl: 'https://zulip.com/avatarinvalid.png');
await store.addUser(badUser);
await tester.pumpWidget(
TestZulipApp(
accountId: eg.selfAccount.id,
child: AvatarImage(userId: badUser.userId, size: 30)));
await tester.pumpAndSettle();
check(
find.descendant(
of: find.byType(AvatarImage),
matching: find.byIcon(ZulipIcons.person),
).evaluate().length
).equals(1);
debugNetworkImageHttpClientProvider = null;
});

testWidgets('shows placeholder when user avatarUrl is null', (WidgetTester tester) async {
addTearDown(testBinding.reset);
await testBinding.globalStore.add(eg.selfAccount, eg.initialSnapshot());
final store = await testBinding.globalStore.perAccount(eg.selfAccount.id);

final userWithNoUrl = eg.user(avatarUrl: null);
await store.addUser(userWithNoUrl);

await tester.pumpWidget(
TestZulipApp(
accountId: eg.selfAccount.id,
child: AvatarImage(userId: userWithNoUrl.userId, size: 30),
),
);
await tester.pumpAndSettle();

check(
find.descendant(
of: find.byType(AvatarImage),
matching: find.byIcon(ZulipIcons.person),
).evaluate().length
).equals(1);
});

testWidgets('shows placeholder when user is not found', (WidgetTester tester) async {
addTearDown(testBinding.reset);
await testBinding.globalStore.add(eg.selfAccount, eg.initialSnapshot());

const nonExistentUserId = 9999999;

await tester.pumpWidget(
TestZulipApp(
accountId: eg.selfAccount.id,
child: AvatarImage(userId: nonExistentUserId, size: 30),
),
);
await tester.pumpAndSettle();

check(
find.descendant(
of: find.byType(AvatarImage),
matching: find.byIcon(ZulipIcons.person),
).evaluate().length
).equals(1);
});
});
}