Add renames in output when using the mirror helper library.

tests/compiler/dart2js/mirror_helper_rename_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.
+
+import "package:expect/expect.dart";
+import 'memory_compiler.dart' show compilerFor;
+import '../../../sdk/lib/_internal/compiler/implementation/apiimpl.dart' show
+    Compiler;
+import
+    '../../../sdk/lib/_internal/compiler/implementation/tree/tree.dart'
+show
+    Node;
+import
+    '../../../sdk/lib/_internal/compiler/implementation/dart_backend/dart_backend.dart';
+import
+    '../../../sdk/lib/_internal/compiler/implementation/mirror_renamer/mirror_renamer.dart';
+import
+    '../../../sdk/lib/_internal/compiler/implementation/scanner/scannerlib.dart'
+show
+    SourceString;
+
+main() {
+  testWithMirrorHeplerLibrary(minify: true);

[Johnni Winther, 2013/08/23 09:25:19]

Hepler -> Helper

[zarah, 2013/08/23 16:16:37]

Done.

+  testWithMirrorHeplerLibrary(minify: false);

[Johnni Winther, 2013/08/23 09:25:19]

Ditto.

[zarah, 2013/08/23 16:16:37]

Done.

+  testWithoutMirrorHelperLibrary(minify: true);
+  testWithoutMirrorHelperLibrary(minify: false);
+}
+
+Compiler runCompiler({useMirrorHelperLibrary: false, minify: false}) {
+  List<String> options = ['--output-type=dart'];
+  if (minify) {
+    options.add('--minify');
+  }
+  Compiler compiler = compilerFor(MEMORY_SOURCE_FILES, options: options);
+  DartBackend backend = compiler.backend;
+  backend.useMirrorHelperLibrary = useMirrorHelperLibrary;
+  compiler.runCompiler(Uri.parse('memory:main.dart'));
+  return compiler;
+}
+
+void testWithMirrorHeplerLibrary({bool minify}) {
+  Compiler compiler = runCompiler(useMirrorHelperLibrary: true, minify: minify);
+
+  DartBackend backend = compiler.backend;
+  MirrorRenamer mirrorRenamer = backend.mirrorRenamer;
+  Map<Node, String> renames = backend.renames;
+  Map<String, SourceString> symbols = mirrorRenamer.symbols;
+
+  Expect.isFalse(null == backend.mirrorHelperLibrary);
+  Expect.isFalse(null == backend.mirrorHelperGetNameFunction);
+  Expect.isTrue(symbols.containsValue(
+      const SourceString(MirrorRenamer.MIRROR_HELPER_GET_NAME_FUNCTION)));
+
+  for (Node n in renames.keys) {
+    if (symbols.containsKey(renames[n])) {
+      if(n.toString() == 'getName') {
+        Expect.equals(
+            const SourceString(MirrorRenamer.MIRROR_HELPER_GET_NAME_FUNCTION),
+            symbols[renames[n]]);
+      } else {
+        Expect.equals(n.toString(), symbols[renames[n]].stringValue);
+      }
+    }
+  }
+
+  String output = compiler.assembledCode;
+  String getNameMatch = MirrorRenamer.MIRROR_HELPER_GET_NAME_FUNCTION;
+  Iterable i = getNameMatch.allMatches(output);
+
+  if (minify) {
+    Expect.equals(1, i.length);
+  } else {
+    // Referenced twice in code and twice in renames map.

[Johnni Winther, 2013/08/23 09:25:19]

Why twice? There is only one call to MirrorSystem.getName(), right?

[zarah, 2013/08/23 16:16:37]

The function getNameHelper from _mirror_helper.dart is inlined, so it appears
twice in the output code: once where it is defined and once where it is called.
Updated the comment.

+    Expect.equals(4, i.length);
+  }
+
+  String mapMatch = 'const<String,SourceString>';
+  i = mapMatch.allMatches(output);
+  Expect.equals(1, i.length);
+}
+
+void testWithoutMirrorHelperLibrary({bool minify}) {
+  Compiler compiler =
+      runCompiler(useMirrorHelperLibrary: false, minify: minify);
+  DartBackend backend = compiler.backend;
+
+  Expect.equals(null, backend.mirrorHelperLibrary);
+  Expect.equals(null, backend.mirrorHelperGetNameFunction);
+  Expect.equals(null, backend.mirrorRenamer);
+}
+
+const MEMORY_SOURCE_FILES = const <String, String> {
+  'main.dart': """
+import 'dart:mirrors';
+
+

[Johnni Winther, 2013/08/23 09:25:19]

Remove extra empty line.

[zarah, 2013/08/23 16:16:37]

Done.

+class Foo {
+  noSuchMethod(Invocation invocation) {
+    MirrorSystem.getName(invocation.memberName);
+  }
+}
+
+void main() {
+  new Foo().fisk();
+}
+"""};