Dartdoc comments retrieved as metadata through dart2js mirrors.

tests/compiler/dart2js/strip_comment_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.
+
+library strip_comment_test;
+
+import '../../../sdk/lib/_internal/compiler/implementation/mirrors/mirrors_util.dart';
+
+testComment(String strippedText, String commentText) {
+  Expect.stringEquals(strippedText, stripComment(commentText));
+}
+
+void main() {
+  testComment('', '//');
+  testComment('', '// ');
+  testComment('', '// ');

[ahe, 2013/01/08 11:59:43]

Did you mean:
 testComment(' ', '//  ');

[Johnni Winther, 2013/01/08 13:39:46]

Yes. Done.

+  testComment('foo bar baz', '//foo bar baz');
+  testComment('foo bar baz', '// foo bar baz');
+  testComment('foo bar baz ', '// foo bar baz ');
+  testComment(' foo bar baz  ', '//  foo bar baz  ');
+
+  testComment('', '///');
+  testComment('', '/// ');
+  testComment('', '/// ');

[ahe, 2013/01/08 11:59:43]

Ditto?

[Johnni Winther, 2013/01/08 13:39:46]

Done.

+  testComment('foo bar baz', '///foo bar baz');
+  testComment('foo bar baz', '/// foo bar baz');
+  testComment('foo bar baz ', '/// foo bar baz ');
+  testComment(' foo bar baz  ', '///  foo bar baz  ');
+
+  testComment('', '/**/');
+  testComment('', '/* */');
+  testComment(' ', '/*  */');
+  testComment('foo bar baz', '/*foo bar baz*/');
+  testComment('foo bar baz', '/* foo bar baz*/');
+  testComment('foo bar baz ', '/* foo bar baz */');
+  testComment(' foo bar baz  ', '/*  foo bar baz  */');
+  testComment('foo\nbar\nbaz', '/*foo\nbar\nbaz*/');
+  testComment('foo\nbar\nbaz', '/* foo\nbar\nbaz*/');
+  testComment('foo \n bar \n baz ', '/* foo \n bar \n baz */');
+  testComment('foo\nbar\nbaz', '/* foo\n *bar\n *baz*/');
+  testComment('foo\nbar\nbaz', '/* foo\n * bar\n * baz*/');
+  testComment('foo \nbar \nbaz ', '/* foo \n * bar \n * baz */');
+  testComment('\nfoo\nbar\nbaz',
+      '''/*
+          * foo
+          * bar
+          * baz*/''');
+  testComment('\nfoo\nbar\nbaz\n',
+      '''/*
+          * foo
+          * bar
+          * baz
+          */''');
+
+  testComment('', '/***/');
+  testComment('', '/** */');
+  testComment(' ', '/**  */');
+  testComment('foo bar baz', '/**foo bar baz*/');
+  testComment('foo bar baz', '/** foo bar baz*/');
+  testComment('foo bar baz ', '/** foo bar baz */');
+  testComment(' foo bar baz  ', '/**  foo bar baz  */');
+  testComment('foo\nbar\nbaz', '/**foo\nbar\nbaz*/');
+  testComment('foo\nbar\nbaz', '/** foo\nbar\nbaz*/');
+  testComment('foo \n bar \n baz ', '/** foo \n bar \n baz */');
+  testComment('foo\nbar\nbaz', '/** foo\n *bar\n *baz*/');
+  testComment('foo\nbar\nbaz', '/** foo\n * bar\n * baz*/');
+  testComment('foo \nbar \nbaz ', '/** foo \n * bar \n * baz */');
+  testComment('\nfoo\nbar\nbaz',
+      '''/**
+          * foo
+          * bar
+          * baz*/''');
+  testComment('\nfoo\nbar\nbaz\n',
+      '''/**
+          * foo
+          * bar
+          * baz
+          */''');
+}