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packages/quiver/test/async/future_stream_test.dart

+// Copyright 2014 Google Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+library quiver.async.future_stream_test;
+
+import 'dart:async';
+
+import 'package:test/test.dart';
+import 'package:quiver/async.dart';
+
+main() {
+  group('FutureStream', () {
+    test('should forward an event', () {
+      var completer = new Completer<Stream<String>>();
+      var controller = new StreamController<String>();
+      var futureStream = new FutureStream(completer.future);
+
+      var done = futureStream.first.then((s) {
+        expect(s, 'hello');
+      });
+
+      completer.complete(controller.stream);
+      controller.add('hello');
+
+      return done;
+    });
+
+    test('should close when the wrapped Steam closes', () {
+      var completer = new Completer<Stream<String>>();
+      var controller = new StreamController<String>();
+      var futureStream = new FutureStream(completer.future);
+
+      var testCompleter = new Completer();
+
+      futureStream.listen((_) {}, onDone: () {
+        // pass
+        testCompleter.complete();
+      });
+
+      completer.complete(controller.stream);
+      controller.close();
+
+      return testCompleter.future;
+    });
+
+    test('should forward errors', () {
+      var completer = new Completer<Stream<String>>();
+      var controller = new StreamController<String>();
+      var futureStream = new FutureStream(completer.future);
+
+      var testCompleter = new Completer();
+
+      futureStream.listen((_) {}, onError: (e) {
+        expect(e, 'error');
+        testCompleter.complete();
+      });
+
+      completer.complete(controller.stream);
+      controller.addError('error');
+
+      return testCompleter.future;
+    });
+
+    test('should be broadcast', () {
+      var completer = new Completer<Stream<String>>();
+      var futureStream = new FutureStream(completer.future, broadcast: true);
+      expect(futureStream.isBroadcast, isTrue);
+    });
+  });
+}