dart2dart: Introduce Renamer that is used by renaming unparser

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 45 matching lines @@
   }
   compile(
       scriptUri,
       fileUri('libraryRoot'),
       fileUri('packageRoot'),
       provider,
       handler,
       const ['--output-type=dart', '--unparse-validation']).then(continuation);
 }
 
+/**
+ * Library name is assumed to be 'mylib' in 'mylib.dart' file.
+ */
+testDart2DartWithLibrary(String srcMain, String srcLibrary, [void continuation(String s)]) {
+  fileUri(path) => new Uri(scheme: 'file', path: path);

[Anton Muhin, 2012/07/23 11:23:10]

looks like a lot of code duplication w/ testDart2Dart, rework?

[Roman, 2012/07/23 15:34:15]

Done.

+
+  final scriptUri = fileUri('script.dart');
+  final libUri = fileUri('mylib.dart');
+
+  provider(uri) {
+    if (uri == scriptUri) return new Future.immediate(srcMain);
+    if (uri.toString() == libUri.toString()) return new Future.immediate(srcLibrary);
+    if (uri.path.endsWith('/core.dart')) return new Future.immediate(coreLib);
+    return new Future.immediate('');
+  }
+
+  handler(uri, begin, end, message, kind) {
+    if (kind === Diagnostic.ERROR || kind === Diagnostic.CRASH) {
+      Expect.fail('$uri: $begin-$end: $message [$kind]');
+    }
+  }
+
+  compile(
+      scriptUri,
+      fileUri('libraryRoot'),
+      fileUri('packageRoot'),
+      provider,
+      handler,
+      const ['--output-type=dart', '--unparse-validation']).then(continuation);
+}
+
 testGenericTypes() {
   testUnparse('var x=new List<List<int>>();');
   testUnparse('var x=new List<List<List<int>>>();');
   testUnparse('var x=new List<List<List<List<int>>>>();');
   testUnparse('var x=new List<List<List<List<List<int>>>>>();');
 }
 
 testForLoop() {
   testUnparse('for(;i<100;i++){}');
   testUnparse('for(i=0;i<100;i++){}');
@@ skipping 111 matching lines @@
   testDart2Dart('main(){new A.fromFoo(5);}'
       'class A{A(this.f);A.fromFoo(foo):this("f");final String f;}');
   // Now even more complicated, with interface and default factory.
   testDart2Dart('main(){new A.fromFoo(5); new I.fromFoo();}'
       'class IFactory{factory I.fromFoo()=> new A(5);}'
       'interface I default IFactory{I.fromFoo();}'
       'class A implements I{A(this.f);A.fromFoo(foo):this("f");'
       'final String f;}');
 }
 
+testConflictLibraryClassRename() {
+  var librarySrc = '''
+#library('mylib');
+
+topfoo() {}
+
+class A {
+  foo(){}
+}
+''';
+  var mainSrc = '''
+#import('mylib.dart', prefix: 'mylib');
+
+
+topfoo() {var x = 5;}
+
+class A{
+  num foo() {}
+  A.fromFoo() {}
+  mylib.A myliba;
+  List<A> mylist;
+}
+
+mylib.A getA() {

[Anton Muhin, 2012/07/23 11:23:10]

nit: => syntax, please

[Roman, 2012/07/23 15:34:15]

Done.

+  return null;
+}
+
+main() {
+  var a = new mylib.A();
+  a.foo();
+  var b = new A.fromFoo();
+  b.foo();
+  var GREATVAR = b.myliba;
+  b.mylist;
+  a = getA();
+  topfoo();
+  mylib.topfoo();
+}
+''';
+  var expectedResult = 'topfoo(){}_topfoo(){var x=5;}A getA(){return null;}'
+      'main(){var a=new A(); a.foo(); var b=new _A.fromFoo(); b.foo(); '
+          'var GREATVAR=b.myliba; b.mylist; a=getA(); _topfoo(); topfoo();}'
+      'class _A{_A.fromFoo(){}List<List> mylist;num foo(){}A myliba;}'
+      'class A{foo(){}}';
+  testDart2DartWithLibrary(mainSrc, librarySrc,
+      (String result) { Expect.equals(expectedResult, result); });
+}
+
 main() {
   testGenericTypes();
   testForLoop();
   testEmptyList();
   testClosure();
   testIndexedOperatorDecl();
   testNativeMethods();
   testPrefixIncrements();
   testConstModifier();
   testSimpleFileUnparse();
   testSimpleObjectInstantiation();
   testSimpleTopLevelClass();
   testClassWithSynthesizedConstructor();
   testClassWithMethod();
   testVariableDefinitions();
   testGetSet();
   testFactoryConstructor();
   testTopLevelField();
+  testConflictLibraryClassRename();
 }