Add Stream.join

tests/lib/async/stream_join_test.dart

Index: tests/lib/async/stream_join_test.dart
diff --git a/tests/lib/async/stream_join_test.dart b/tests/lib/async/stream_join_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..b7b9f78ab5c25074de613b8c319f6bacf71a85a6
--- /dev/null
+++ b/tests/lib/async/stream_join_test.dart
@@ -0,0 +1,75 @@
+// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+// Test the basic StreamController and StreamController.singleSubscription.
+library stream_join_test;
+
+import 'dart:async';
+import 'event_helper.dart';
+import 'package:unittest/unittest.dart';
+import "package:expect/expect.dart";
+
+main() {
+  test("join-empty", () {
+    StreamController c = new StreamController();
+    c.stream.join("X").then(expectAsync1(
+      (String s) => expect(s, equals(""))
+    ));
+    c.close();
+  });
+
+  test("join-single", () {
+    StreamController c = new StreamController();
+    c.stream.join("X").then(expectAsync1(
+      (String s) => expect(s, equals("foo"))
+    ));
+    c.add("foo");
+    c.close();
+  });
+
+  test("join-three", () {
+    StreamController c = new StreamController();
+    c.stream.join("X").then(expectAsync1(
+      (String s) => expect(s, equals("fooXbarXbaz"))
+    ));
+    c.add("foo");
+    c.add("bar");
+    c.add("baz");
+    c.close();
+  });
+
+  test("join-three-non-string", () {
+    StreamController c = new StreamController();
+    c.stream.join("X").then(expectAsync1(
+      (String s) => expect(s, equals("fooXbarXbaz"))
+    ));
+    c.add(new Foo("foo"));
+    c.add(new Foo("bar"));
+    c.add(new Foo("baz"));
+    c.close();
+  });
+
+  test("join-error", () {
+    StreamController c = new StreamController();
+    c.stream.join("X").catchError(expectAsync1(
+      (String s) => expect(s, equals("BAD!"))
+    ));
+    c.add(new Foo("foo"));
+    c.add(new Foo("bar"));
+    c.add(new Bad());
+    c.add(new Foo("baz"));
+    c.close();
+  });
+}
+
+class Foo {
+  String value;
+  Foo(this.value);
+  String toString() => value;
+}
+
+class Bad {
+  Bad();
+  String toString() => throw "BAD!";
+}