Test 'Change State' button into Multiple Document (using listbox)

At UNG Docs interface, test if you are able to change states on multiple
documents.
This button is not implemented yet.

testUNGDocs.py

@@ -929,6 +929,23 @@ class TestUNGDocs(UNGTestMixin):
         #XXX this is not implemented yet
         raise NotImplementedError("Starred filter is not implemented yet")
 
+    def test_change_state_button(self):
+        """test the possibility to change state of many documents
+        from the standard ung default interface, using 'Change State' button"""
+        test_time = int(unittest.time.time())
+        #create 2 web_page
+        for doc_index in range(2):
+            self.create_document('page', name="Functional UNG Test %d - "
+                                        "Web Page %d" % (test_time, doc_index))
+        self.open_ung_default_page(clear_cache=1, wait_for_activities=1)
+        #select the 2 documents created
+        self.selenium.click("//table[@class=\"listbox your_listbox your_listbox-table\"]/tbody/tr[1]/td[1]/input")
+        self.selenium.click("//table[@class=\"listbox your_listbox your_listbox-table\"]/tbody/tr[2]/td[1]/input")
+        #try to change state of both documents
+        self.selenium.click("//button[@class=\"change_state\"]")
+        self.selenium.wait_for_page_to_load("30000")
+        raise NotImplementedError
+
 if __name__ == "__main__":
     unittest.main()