Added the ability to tun off logging for individual behaviors.

tests/lib/unittest/mock_test.dart

Index: tests/lib/unittest/mock_test.dart
===================================================================
--- tests/lib/unittest/mock_test.dart	(revision 10299)
+++ tests/lib/unittest/mock_test.dart	(working copy)
@@ -587,4 +587,19 @@
     expect(result.logs, orderedEquals([e0, e1, e2, e3, e4, e5, e6,
                                        e7, e8, e9, e10]));
   });
+
+  test('Mocking: stepwiseValidate', () {
+    LogEntryList logList = new LogEntryList('test');
+    for (var i = 0; i < 10; i++) {
+      LogEntry e = new LogEntry(null, 'foo', [ i ], Action.IGNORE);

[Siggi Cherem (dart-lang), 2012/08/07 23:58:47]

nit: no spaces around i (simply [i]), same in the other file.

+      logList.add(e);
+    }
+    int total = 0;
+    logList.stepwiseValidate((l, pos) {

[Siggi Cherem (dart-lang), 2012/08/07 23:58:47]

ditto: l => logs

+        total += l[pos].args[0] * l[pos+1].args[0];

[Siggi Cherem (dart-lang), 2012/08/07 23:58:47]

style: space around operators (+)

+        expect(l[pos+1].args[0] - l[pos].args[0], equals(1));
+        return 2;
+    });
+    expect(total, equals(0*1+2*3+4*5+6*7+8*9)); 

[Siggi Cherem (dart-lang), 2012/08/07 23:58:47]

ditto: spaces
- add parenthesis too, I know it is not the case, just want to make sure it is
not: 0 * (1 + 2 * (3 + 4 * ( ...)))

+  });
 }