New expectation functions plus convert old tests to use these.

tests/utils/markdown_test.dart

 // Copyright (c) 2011, 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.
 
 /// Unit tests for markdown.
 #library('markdown_tests');
 
 #import('../../lib/dartdoc/markdown.dart');
 
 // TODO(rnystrom): Better path to unittest.
@@ skipping 743 matching lines @@
     if (!passed) {
       // Remove trailing newline.
       html = html.substring(0, html.length - 1);
 
       print('FAIL: $description');
       print('  expect: ${html.replaceAll("\n", "\n          ")}');
       print('  actual: ${result.replaceAll("\n", "\n          ")}');
       print('');
     }
 
-    expect(passed).isTrue();
+    expect(passed, isTrue);
   });
 }
 
 /// Does a loose comparison of the two strings of HTML. Ignores differences in
 /// newlines and indentation.
 compareOutput(String a, String b) {
   int i = 0;
   int j = 0;
 
   skipIgnored(String s, int i) {
@@ skipping 13 matching lines @@
 
     // If one string runs out of non-ignored strings, the other must too.
     if (i == a.length) return j == b.length;
     if (j == b.length) return i == a.length;
 
     if (a[i] != b[j]) return false;
     i++;
     j++;
   }
 }