fix(FormController): propagate dirty state to parent forms

src/ng/directive/form.js

@@ -117,6 +117,7 @@ function FormController(element, attrs) {
     element.removeClass(PRISTINE_CLASS).addClass(DIRTY_CLASS);
     form.$dirty = true;
     form.$pristine = false;
+    parentForm.$setDirty();
   };
 
 }

test/ng/directive/formSpec.js

@@ -284,6 +284,9 @@ describe('form', function() {
       inputB.$setValidity('MyError', true);
       expect(parent.$error.MyError).toBe(false);
       expect(child.$error.MyError).toBe(false);
+
+      child.$setDirty();
+      expect(parent.$dirty).toBeTruthy();
     });