Make dart2js unittests async.

tests/compiler/dart2js/logical_expression_test.dart

 // Copyright (c) 2014, 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 that logical or-expressions don't introduce unnecessary nots.
 
-import "package:async_helper/async_helper.dart";
+import 'dart:async';
+import 'package:async_helper/async_helper.dart';
 import 'compiler_helper.dart';
 
 const String TEST_ONE = r"""
 foo(bar, gee) {
   bool cond1 = bar();
   if (cond1 || gee()) gee();
   if (cond1 || gee()) gee();
 }
 """;
 
 const String TEST_TWO = r"""
 void foo(list, bar) {
   if (list == null) bar();
   if (list == null || bar()) bar();
   if (list == null || bar()) bar();
 }
 """;
 
 main() {
-  // We want something like:
-  //     var t1 = bar.call$0() === true;
-  //     if (t1 || gee.call$0() === true) gee.call$0();
-  //     if (t1 || gee.call$0() === true) gee.call$0();
-  compileAndDoNotMatchFuzzy(TEST_ONE, 'foo',
-                       r"""var x = [a-zA-Z0-9$.]+\(\) == true;
-                           if \(x \|\| [a-zA-Z0-9$.]+\(\) === true\) [^;]+;
-                           if \(x \|\| [a-zA-Z0-9$.]+\(\) === true\) [^;]+;""");
+  asyncTest(() => Future.wait([
+    // We want something like:
+    //     var t1 = bar.call$0() === true;
+    //     if (t1 || gee.call$0() === true) gee.call$0();
+    //     if (t1 || gee.call$0() === true) gee.call$0();
+    compileAndDoNotMatchFuzzy(TEST_ONE, 'foo',
+        r"""var x = [a-zA-Z0-9$.]+\(\) == true;
+            if \(x \|\| [a-zA-Z0-9$.]+\(\) === true\) [^;]+;
+            if \(x \|\| [a-zA-Z0-9$.]+\(\) === true\) [^;]+;"""),
 
 
-  // We want something like:
-  //     var t1 = list == null;
-  //     if (t1) bar.call$0();
-  //     if (t1 || bar.call$0() === true) bar.call$0();
-  //     if (t1 || bar.call$0() === true) bar.call$0();
-  compileAndMatchFuzzy(TEST_TWO, 'foo',
-                       r"""var x = x == null;
-                           if \(x\) [^;]+;
-                           if \(x \|\| [a-zA-Z0-9$.]+\(\) === true\) [^;]+;
-                           if \(x \|\| [a-zA-Z0-9$.]+\(\) === true\) [^;]+;""");
+    // We want something like:
+    //     var t1 = list == null;
+    //     if (t1) bar.call$0();
+    //     if (t1 || bar.call$0() === true) bar.call$0();
+    //     if (t1 || bar.call$0() === true) bar.call$0();
+    compileAndMatchFuzzy(TEST_TWO, 'foo',
+        r"""var x = x == null;
+            if \(x\) [^;]+;
+            if \(x \|\| [a-zA-Z0-9$.]+\(\) === true\) [^;]+;
+            if \(x \|\| [a-zA-Z0-9$.]+\(\) === true\) [^;]+;"""),
+  ]));
 }