dart2dart Fix factory for interfaces renames

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('mock_compiler.dart');
 #import("../../../lib/compiler/compiler.dart");
 #import("../../../lib/compiler/implementation/dart_backend/dart_backend.dart");
 #import("../../../lib/compiler/implementation/elements/elements.dart");
@@ skipping 459 matching lines @@
   PlaceholderCollector collector = new PlaceholderCollector(compiler);
   collector.collect(interfaceElement,
       compiler.enqueuer.resolution.resolvedElements[interfaceElement]);
   ClassNode interfaceNode = interfaceElement.parseNode(compiler);
   Node defaultTypeNode = interfaceNode.defaultClause.typeName;
   ClassElement classElement = compiler.mainApp.find(buildSourceString('C'));
   // Check that 'C' in default clause of I gets into placeholders.
   Expect.isTrue(collector.elementNodes[classElement].contains(defaultTypeNode));
 }
 
+testFactoryRename() {
+  var librarySrc = '''
+#library('mylib');
+
+interface I default B { I(); }
+class A implements I { A() {} }
+class B { factory I() {} }
+
+''';
+  var mainSrc = '''
+#import('mylib.dart', prefix: 'mylib');
+
+interface I default B { I(); }
+class A implements I { A() {} }
+class B { factory I() {} }
+
+main() {
+  new I();
+  new A();
+
+  new mylib.I();
+  new mylib.A();
+}
+''';
+  var expectedResult =
+    'interface p_I default B{p_I();}'
+    'class A implements p_I{A(){}}'
+    'class B{factory p_I(){}}'
+    'interface I default p_B{I();}'
+    'class p_A implements I{p_A(){}}'
+    'class p_B{factory I(){}}'
+    'main(){new I(); new p_A(); new p_I(); new A();}';
+  testDart2DartWithLibrary(mainSrc, librarySrc,
+      (String result) { Expect.equals(expectedResult, result); });
+}
+
 main() {
   testSignedConstants();
   testGenericTypes();
   testForLoop();
   testEmptyList();
   testClosure();
   testIndexedOperatorDecl();
   testNativeMethods();
   testPrefixIncrements();
   testConstModifier();
@@ skipping 10 matching lines @@
   testAbstractClass();
   //testConflictSendsRename();
   testNoConflictSendsRename();
   testConflictLibraryClassRename();
   testDefaultClassWithArgs();
   testClassExtendsWithArgs();
   testStaticInvocation();
   // testLibraryGetSet(); // http://dartbug.com/4604
   testFieldTypeOutput();
   testDefaultClassNamePlaceholder();
+  testFactoryRename();
 }