Be smarter about when disabling tree-shaking.

dart/tests/compiler/dart2js/mirror_tree_shaking_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.
 
 // Test that no parts are emitted when deferred loading isn't used.

[Johnni Winther, 2013/06/13 07:08:29]

Update comment.

[ahe, 2013/06/14 12:00:22]

Done.

 
 import 'package:expect/expect.dart';
 import 'memory_source_file_helper.dart';
 
 import '../../../sdk/lib/_internal/compiler/implementation/dart2jslib.dart'
        show NullSink;
 
 import '../../../sdk/lib/_internal/compiler/compiler.dart'
        show Diagnostic;
 
 import 'dart:async';
 
 main() {
   Uri script = currentDirectory.resolve(nativeToUriPath(new Options().script));
   Uri libraryRoot = script.resolve('../../../sdk/');
   Uri packageRoot = script.resolve('./packages/');
 
   MemorySourceFileProvider.MEMORY_SOURCE_FILES = MEMORY_SOURCE_FILES;
   var provider = new MemorySourceFileProvider();
   void diagnosticHandler(Uri uri, int begin, int end,
                          String message, Diagnostic kind) {
-    if (kind == Diagnostic.VERBOSE_INFO) {
+    if (kind == Diagnostic.VERBOSE_INFO || kind == Diagnostic.WARNING) {
       return;
     }
     throw '$uri:$begin:$end:$message:$kind';
   }
 
   EventSink<String> outputProvider(String name, String extension) {
-    if (name != '') throw 'Attempt to output file "$name.$extension"';
     return new NullSink('$name.$extension');
   }
 
   Compiler compiler = new Compiler(provider.readStringFromUri,
                                    outputProvider,
                                    diagnosticHandler,
                                    libraryRoot,
                                    packageRoot,
                                    []);
   compiler.run(Uri.parse('memory:main.dart'));
   Expect.isFalse(compiler.compilationFailed);
+  Expect.isFalse(compiler.enqueuer.resolution.hasEnqueuedEverything);
+  Expect.isFalse(compiler.enqueuer.codegen.hasEnqueuedEverything);
 }
 
 const Map MEMORY_SOURCE_FILES = const {
-  'main.dart': """
-class Greeting {
-  final message;
-  const Greeting(this.message);
+  'main.dart': r"""
+import 'dart:mirrors';
+
+class Foo {
+  noSuchMethod(invocation) {
+    print('Invoked ${MirrorSystem.getName(invocation.memberName)}');
+    return reflect('foobar').delegate(invocation);
+  }
 }
 
-const fisk = const Greeting('Hello, World!');
-
-main() {
-  var x = fisk;
-  if (new DateTime.now().millisecondsSinceEpoch == 42) {
-    x = new Greeting(\"I\'m confused\");
-  }
-  print(x.message);
+void main() {
+  print(new Foo().substring(3));
 }
 """,
 };