/**
* Run this test against a particular question.
* @param question_usage_by_activity $quba the useage to use when running the test.
* @param qtype_stack_question $question the question to test.
* @param int $seed the random seed to use.
* @return stack_question_test_result the test results.
*/
public function test_question(question_usage_by_activity $quba, qtype_stack_question $question, $seed)
{
$slot = $quba->add_question($question, $question->defaultmark);
$quba->start_question($slot, $seed);
$response = self::compute_response($question, $this->inputs);
$quba->process_action($slot, $response);
$results = new stack_question_test_result($this);
foreach ($this->inputs as $inputname => $notused) {
$inputstate = $question->get_input_state($inputname, $response);
// The _val below is a hack. Not all inputnames exist explicitly in
// the response, but the _val does. Some inputs, e.g. matrices have
// many entries in the response so none match $response[$inputname].
if (array_key_exists($inputname, $response)) {
$inputresponse = $response[$inputname];
} else {
$inputresponse = $response[$inputname . '_val'];
}
$results->set_input_state($inputname, $inputresponse, $inputstate->contentsdisplayed, $inputstate->status, $inputstate->errors);
}
foreach ($this->expectedresults as $prtname => $expectedresult) {
$result = $question->get_prt_result($prtname, $response, false);
$results->set_prt_result($prtname, $result);
}
return $results;
}
protected function process_submission($data)
{
$this->quba->process_action($this->slot, $data);
}
