platform/test/hooked_test.dart

import 'dart:convert';
import 'dart:io';
import 'package:angel_container/mirrors.dart';
import 'package:angel_framework/angel_framework.dart';
import 'package:http/http.dart' as http;
import 'package:test/test.dart';
import 'common.dart';

main() {
  Map headers = <String, String>{
    'Accept': 'application/json',
    'Content-Type': 'application/json'
  };

  Angel app;
  HttpServer server;
  String url;
  http.Client client;
  HookedService todoService;

  setUp(() async {
    app = new Angel(reflector: MirrorsReflector());
    client = new http.Client();
    app.use('/todos', new MapService());
    app.use('/books', new BookService());

    todoService = app.findHookedService<MapService>('todos');

    todoService.beforeAllStream().listen((e) {
      print('Fired ${e.eventName}! Data: ${e.data}; Params: ${e.params}');
    });

    app.errorHandler = (e, req, res) {
      throw e.error;
    };

    server = await new AngelHttp(app).startServer();
    url = "http://${server.address.host}:${server.port}";
  });

  tearDown(() async {
    await server.close(force: true);
    app = null;
    url = null;
    client.close();
    client = null;
    todoService = null;
  });

  test("listen before and after", () async {
    int count = 0;

    todoService
      ..beforeIndexed.listen((_) {
        count++;
      })
      ..afterIndexed.listen((_) {
        count++;
      });

    var response = await client.get("$url/todos");
    print(response.body);
    expect(count, equals(2));
  });

  test("cancel before", () async {
    todoService.beforeCreated
      ..listen((HookedServiceEvent event) {
        event.cancel({"hello": "hooked world"});
      })
      ..listen((HookedServiceEvent event) {
        event.cancel({"this_hook": "should never run"});
      });

    var response = await client.post("$url/todos",
        body: json.encode({"arbitrary": "data"}),
        headers: headers as Map<String, String>);
    print(response.body);
    Map result = json.decode(response.body);
    expect(result["hello"], equals("hooked world"));
  });

  test("cancel after", () async {
    todoService.afterIndexed
      ..listen((HookedServiceEvent event) async {
        // Hooks can be Futures ;)
        event.cancel([
          {"angel": "framework"}
        ]);
      })
      ..listen((HookedServiceEvent event) {
        event.cancel({"this_hook": "should never run either"});
      });

    var response = await client.get("$url/todos");
    print(response.body);
    List result = json.decode(response.body);
    expect(result[0]["angel"], equals("framework"));
  });

  test('metadata', () async {
    final service = new HookedService(new IncrementService())..addHooks(app);
    expect(service.inner, isNot(const IsInstanceOf<MapService>()));
    IncrementService.TIMES = 0;
    await service.index();
    expect(IncrementService.TIMES, equals(2));
  });

  test('inject request + response', () async {
    HookedService books = app.findService('books');

    books.beforeIndexed.listen((e) {
      expect([e.request, e.response], everyElement(isNotNull));
      print('Indexing books at path: ${e.request.path}');
    });

    var response = await client.get('$url/books');
    print(response.body);

    var result = json.decode(response.body);
    expect(result, isList);
    expect(result, isNotEmpty);
    expect(result[0], equals({'foo': 'bar'}));
  });

  test('contains provider in before and after', () async {
    var svc = new HookedService(new AnonymousService(index: ([p]) async => []));

    ensureProviderIsPresent(HookedServiceEvent e) {
      var type = e.isBefore ? 'before' : 'after';
      print('Params to $type ${e.eventName}: ${e.params}');
      expect(e.params, isMap);
      expect(e.params.keys, contains('provider'));
      expect(e.params['provider'], const IsInstanceOf<Providers>());
    }

    svc
      ..beforeAll(ensureProviderIsPresent)
      ..afterAll(ensureProviderIsPresent);

    await svc.index({'provider': const Providers('testing')});
  });
}