$validator->expects($this->once())
  ->method('isValid')->id(1)
  ->with($this->equalTo('test1'))
  ->will($this->returnValue(true));

$validator->expects($this->once())
   ->after(1)
   ->method('isValid')
   ->with($this->equalTo('test2'))
   ->will($this->returnValue(true));

==

Failed asserting that two strings are equal.
--- Expected
+++ Actual
@@ @@
-test1
+test2

/Users/brice/cvs/www/common/php/library/DoW/Form/Element.php:629
/Users/brice/cvs/www/test/units/library/DoW/Form/ElementTest.php:479