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oott/frontend/test/api/backend_api_test_endpoint_test.dart
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rzuastiandClaude Opus 4.8 98b5fa267f Add automated test suite for the Flutter frontend
Introduce a headless `flutter test` suite (83 tests) covering models,
utilities, every API endpoint, and the five screens, with shared helpers
and fixtures so new tests stay terse.

API endpoint methods are statically-dispatched extensions on the
BackendAPI singleton, so they cannot be mocked via `implements`. Mock at
the Dio HTTP-adapter layer (http_mock_adapter) instead, enabled by two
small @visibleForTesting seams: BackendAPI.dioForTesting swaps the
singleton's Dio, and BackendReachability.forceOnlineForTesting() forces a
deterministic online state so polling widgets load.

Add frontend/run_tests.sh and document it in CLAUDE.md.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-06-03 19:41:52 -04:00

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Dart

import 'package:flutter_test/flutter_test.dart';
import 'package:frontend/utils/oott_api.dart';
void main() {
// BackendAPI.test() builds its own Dio internally (no injectable seam), so
// only its error-mapping path is testable here: an unresolvable host must
// come back as a non-null, user-facing message rather than throwing. The
// success path is a documented coverage gap.
test('BackendAPI.test returns a user message for an unreachable backend',
() async {
// Loopback port 1 is closed: connection is refused immediately, keeping the
// test hermetic (no DNS, no TLS, no traffic leaving the machine).
final result = await BackendAPI.test('http://127.0.0.1:1/api', '');
expect(result, isNotNull);
expect(result, isNotEmpty);
});
}