test: add basic integration test for snaps

.github/workflows/integration-test.yaml

@@ -0,0 +1,22 @@
+name: Integration Test
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  integration:
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@v3
+      - uses: subosito/flutter-action@v2
+        with:
+          channel: 'stable'
+          flutter-version: '3.10.6'
+      - run: sudo apt update
+      - run: sudo apt install -y clang cmake libblkid-dev libglib2.0-dev libgtk-3-dev liblzma-dev network-manager ninja-build packagekit pkg-config polkitd xvfb
+      - run: sudo cp integration_test/assets/snapd-ci.pkla /var/lib/polkit-1/localauthority/50-local.d/
+      - run: LANG=en_US.UTF-8 xvfb-run -a -s '-screen 0 1024x768x24 +extension GLX' flutter test integration_test

integration_test/app_center_test.dart

@@ -0,0 +1,78 @@
+import 'dart:io';
+
+import 'package:app_center/main.dart' as app;
+import 'package:app_center/src/store/store_app.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:integration_test/integration_test.dart';
+import 'package:ubuntu_test/ubuntu_test.dart';
+import 'package:yaru_icons/yaru_icons.dart';
+import 'package:yaru_test/yaru_test.dart';
+
+import '../test/test_utils.dart';
+
+void main() {
+  IntegrationTestWidgetsFlutterBinding.ensureInitialized();
+
+  testWidgets('install and remove a snap', (tester) async {
+    final file = File('/snap/bin/hello');
+    await app.main([]);
+    await tester.pumpUntil(find.byType(StoreApp));
+    await tester.pumpAndSettle();
+    await testSearchSnap(tester, packageName: 'hello');
+    await testInstallSnap(tester, installedFile: file);
+    await testRemoveSnap(tester, installedFile: file);
+  });
+}
+
+Future<void> testSearchSnap(
+  WidgetTester tester, {
+  required String packageName,
+}) async {
+  final searchField = find.textField(tester.l10n.searchFieldSearchHint);
+  expectSync(searchField, findsOneWidget);
+  await tester.enterText(searchField, packageName);
+  await tester.pumpAndSettle();
+
+  final dropdownEntry = find.widgetWithText(ListTile, packageName);
+  await tester.pumpUntil(dropdownEntry);
+  expectSync(dropdownEntry, findsOneWidget);
+
+  await tester.tap(dropdownEntry);
+  await tester.pumpAndSettle();
+}
+
+Future<void> testInstallSnap(
+  WidgetTester tester, {
+  required File installedFile,
+}) async {
+  expect(installedFile.existsSync(), isFalse);
+
+  final installButton = find.button(tester.l10n.snapActionInstallLabel);
+  final openButton = find.button(tester.l10n.snapActionOpenLabel);
+  expectSync(installButton, findsOneWidget);
+  expectSync(openButton, findsNothing);
+
+  await tester.tap(installButton);
+  await tester.pumpUntil(openButton);
+
+  expectSync(openButton, findsOneWidget);
+  expectSync(installButton, findsNothing);
+
+  expectSync(installedFile.existsSync(), isTrue);
+}
+
+Future<void> testRemoveSnap(
+  WidgetTester tester, {
+  required File installedFile,
+}) async {
+  final installButton = find.button(tester.l10n.snapActionInstallLabel);
+  expect(installButton, findsNothing);
+
+  await tester.tap(find.iconButton(YaruIcons.view_more_horizontal));
+  await tester.pumpAndSettle();
+  await tester.tap(find.button(tester.l10n.snapActionRemoveLabel));
+  await tester.pumpUntil(installButton);
+
+  expect(installedFile.existsSync(), isFalse);
+}

integration_test/assets/snapd-ci.pkla

@@ -0,0 +1,4 @@
+[Allow privileged snapd actions without prompting, for use in integration tests in destructive CI environments only]
+Identity=unix-user:*
+Action=io.snapcraft.snapd.manage
+ResultAny=yes

pubspec.yaml

@@ -62,6 +62,8 @@ dev_dependencies:
   flutter_lints: ^2.0.0
   flutter_test:
     sdk: flutter
+  integration_test:
+    sdk: flutter
   melos: ^3.0.0
   mockito: 5.4.2