I am using PHPUnit Selenium extension for Selenium RC.
I can argue that the field is present:
$this->assertElementPresent('Date');
But how can I assert that the field is disabled (or not editable)?
isEditable() will return true / false
isEditable()
$this->assertEquals(false, $this->isEditable('Date'));
... or better yet:
$this->assertNotEditable('Date');