parent
dd18fc3bc7
commit
5e8f83cf8a
2 changed files with 30 additions and 9 deletions
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@ -5,10 +5,10 @@ import 'package:rules_of_living/src/Engine.dart';
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class EngineService {
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Engine _engine;
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Engine get engine => _engine ?? createEngine(null);
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Engine get engine => _engine ?? getEngine(Engine());
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Engine createEngine(html.CanvasElement canvas) {
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_engine = Engine(canvas);
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Engine getEngine(Engine engine) {
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_engine = engine;
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return _engine;
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}
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@ -45,5 +45,4 @@ class EngineService {
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}
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bool get isRunning => engine.running;
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}
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@ -1,19 +1,41 @@
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@TestOn('browser')
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import 'package:test/test.dart';
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import 'package:mockito/mockito.dart';
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import 'package:rules_of_living/src/Engine.dart';
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import 'package:rules_of_living/service/engine_service.dart';
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class MockEngine extends Mock implements Engine {}
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void main() {
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EngineService sut;
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MockEngine me;
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setUp(() {
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me = MockEngine();
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sut = EngineService();
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});
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group("Dependency Injection", () {
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test("EngineService accesses the Engine defined in getEngine", () {
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sut.getEngine(me);
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Engine result = sut.engine;
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expect(result, equals(me));
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});
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});
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group("caching", () {
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test("EngineService creates an engine on demand", () {
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expect(sut.engine, isNotNull);
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Engine result = sut.engine;
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expect(result, TypeMatcher<Engine>());
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});
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test("EngineService returns the cached engine on subsequent requests", () {
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expect(sut.engine, allOf(isNotNull, equals(sut.engine)));
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Engine result = sut.engine;
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expect(sut.engine, equals(result));
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});
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test("caching can be overriden by providing a custom engine", () {
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Engine first = sut.engine;
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sut.getEngine(me);
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Engine second = sut.engine;
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expect(second, isNot(equals(first)));
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});
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});
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}
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