test: set up non-integration testing (#9)

* test: set up non-integration testing

* pass github token

* allow commenting on pull request

.github/workflows/ci.yaml

@@ -14,6 +14,7 @@ jobs:
     permissions:
       id-token: write
       contents: read
+      pull-requests: write
     steps:
       - uses: actions/checkout@v4
       - name: Read asdf versions
@@ -29,7 +30,15 @@ jobs:
       - name: Analyze
         run: flutter analyze .
       - name: Format
-        run: dart format lib --set-exit-if-changed
+        run: dart format lib test --set-exit-if-changed
+      - name: Test
+        run: flutter test --coverage
+      - name: Report test coverage
+        uses: mbta/github-actions-report-lcov@v1
+        with:
+          coverage-files: coverage/lcov.info
+          artifact-name: code-coverage-report
+          github-token: ${{ secrets.GITHUB_TOKEN }}
       - name: Configure AWS Credentials
         uses: aws-actions/configure-aws-credentials@v4
         with:

.gitignore

@@ -31,6 +31,7 @@ migrate_working_dir/
 .pub-cache/
 .pub/
 /build/
+/coverage/
 
 # Symbolication related
 app.*.symbols

test/main_test.dart

@@ -0,0 +1,11 @@
+import 'package:flutter_test/flutter_test.dart';
+
+import 'package:mbta_app/main.dart';
+
+void main() {
+  testWidgets("Home should say \"Hello World!\"", (tester) async {
+    await tester.pumpWidget(const MainApp());
+
+    expect(find.text("Hello World!"), findsOneWidget);
+  });
+}