Upgrading tests with unittest deprecations

tests/lib/async/stream_join_test.dart

 // 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(
+    c.stream.join("X").then(expectAsync(
       (String s) => expect(s, equals(""))
     ));
     c.close();
   });
 
   test("join-single", () {
     StreamController c = new StreamController();
-    c.stream.join("X").then(expectAsync1(
+    c.stream.join("X").then(expectAsync(
       (String s) => expect(s, equals("foo"))
     ));
     c.add("foo");
     c.close();
   });
 
   test("join-three", () {
     StreamController c = new StreamController();
-    c.stream.join("X").then(expectAsync1(
+    c.stream.join("X").then(expectAsync(
       (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(
+    c.stream.join("X").then(expectAsync(
       (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(
+    c.stream.join("X").catchError(expectAsync(
       (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!";
 }