dart2dart fix synthesized constructor appearing in unparser. Don't output it.

tests/compiler/dart2js/unparser_test.dart

 // Copyright (c) 2012, 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.
 
 #import('dart:uri');
 #import('parser_helper.dart');
 #import("../../../lib/compiler/compiler.dart");
 #import("../../../lib/compiler/implementation/tree/tree.dart");
 
 testUnparse(String statement) {
@@ skipping 114 matching lines @@
 
 testSimpleObjectInstantiation() {
   testUnparse('main(){new Object();}');
 }
 
 testSimpleTopLevelClass() {
   final src = 'main(){new A();}class A{A(){}}';
   testDart2Dart(src, (String s) => Expect.equals(src, s));
 }
 
+testClassWithSynthesizedConstructor() {
+  final src = 'main(){new A();}class A{}';
+  testDart2Dart(src, (String s) => Expect.equals(src, s));

[Anton Muhin, 2012/07/10 13:27:46]

definitely the time to introduce a helper which checks the string doesn't change
after dart2dart.

[Roman, 2012/07/10 13:47:16]

Done. If no continuation is passed to testDart2Dart() it will just check that
source does not change.

+}
+
+testClassWithMethod() {
+  final src = 'main(){var a=new A(); a.foo();}class A{void foo(){}}';
+  testDart2Dart(src, (String s) => Expect.equals(src, s));
+}
+
 main() {
   testGenericTypes();
   testForLoop();
   testEmptyList();
   testClosure();
   testIndexedOperatorDecl();
   testNativeMethods();
   testPrefixIncrements();
   testConstModifier();
   testSimpleFileUnparse();
   testSimpleObjectInstantiation();
   testSimpleTopLevelClass();
+  testClassWithSynthesizedConstructor();
+  testClassWithMethod();
   testTopLevelField();
 }