isEven, isOdd, isNegative, isMaxValue, isMinValue, isInfinite, isPositive, isSingleValue.

tests/corelib/set_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.
 
 class SetTest {
 
   static testMain() {
     Set set = new Set();
     Expect.equals(0, set.length);
     set.add(1);
@@ skipping 58 matching lines @@
     set.forEach(testForEach);
     Expect.equals(10 + 9 + 8 + 7 + 6 + 5 + 4 + 3 + 2 + 1, sum);
 
     sum = 0;
 
     mapped.forEach(testForEach);
     Expect.equals(1 + 2 + 5 + 10 + 17 + 26 + 37 + 50 + 65 + 82, sum);
 
     // Test Set.filter.
     testFilter(int val) {
-      return val.isEven();
+      return val.isEven;
     }
 
     Set filtered = set.filter(testFilter);
 
     Expect.equals(5, filtered.length);
 
     Expect.equals(true, filtered.contains(0));
     Expect.equals(true, filtered.contains(2));
     Expect.equals(true, filtered.contains(4));
     Expect.equals(true, filtered.contains(6));
@@ skipping 72 matching lines @@
     set.clear();
     Expect.equals(0, set.length);
     set.add(11);
     Expect.equals(1, set.length);
   }
 }
 
 main() {
   SetTest.testMain();
 }