/** * Get the quiz and question statistics, either by loading the cached results, * or by recomputing them. * * @param object $quiz the quiz settings. * @param string $whichattempts which attempts to use, represented internally as one of the constants as used in * $quiz->grademethod ie. * QUIZ_GRADEAVERAGE, QUIZ_GRADEHIGHEST, QUIZ_ATTEMPTLAST or QUIZ_ATTEMPTFIRST * we calculate stats based on which attempts would affect the grade for each student. * @param string $whichtries which tries to analyse for response analysis. Will be one of * question_attempt::FIRST_TRY, LAST_TRY or ALL_TRIES. * @param array $groupstudents students in this group. * @param array $questions full question data. * @param \core\progress\base|null $progress * @return array with 2 elements: - $quizstats The statistics for overall attempt scores. * - $questionstats \core_question\statistics\questions\all_calculated_for_qubaid_condition */ public function get_all_stats_and_analysis($quiz, $whichattempts, $whichtries, $groupstudents, $questions, $progress = null) { if ($progress === null) { $progress = new \core\progress\none(); } $qubaids = quiz_statistics_qubaids_condition($quiz->id, $groupstudents, $whichattempts); $qcalc = new \core_question\statistics\questions\calculator($questions, $progress); $quizcalc = new \quiz_statistics\calculator($progress); $progress->start_progress('', 3); if ($quizcalc->get_last_calculated_time($qubaids) === false) { // Recalculate now. $questionstats = $qcalc->calculate($qubaids); $progress->progress(1); $quizstats = $quizcalc->calculate($quiz->id, $whichattempts, $groupstudents, count($questions), $qcalc->get_sum_of_mark_variance()); $progress->progress(2); } else { $quizstats = $quizcalc->get_cached($qubaids); $progress->progress(1); $questionstats = $qcalc->get_cached($qubaids); $progress->progress(2); } if ($quizstats->s()) { $subquestions = $questionstats->get_sub_questions(); $this->analyse_responses_for_all_questions_and_subquestions($questions, $subquestions, $qubaids, $whichtries, $progress); } $progress->progress(3); $progress->end_progress(); return array($quizstats, $questionstats); }
/** * Check the question stats and the response counts used in the statistics report. If the appropriate files exist in fixtures/. * * @param PHPUnit_Extensions_Database_DataSet_ITable[] $csvdata Data loaded from csv files for this test. * @param string $whichattempts * @param string $whichtries * @param \core\dml\sql_join $groupstudentsjoins * @return array with contents 0 => $questions, 1 => $quizstats, 2=> $questionstats, 3=> $qubaids Might be needed for further * testing. */ protected function check_stats_calculations_and_response_analysis($csvdata, $whichattempts, $whichtries, \core\dml\sql_join $groupstudentsjoins) { $this->report = new quiz_statistics_report(); $questions = $this->report->load_and_initialise_questions_for_calculations($this->quiz); list($quizstats, $questionstats) = $this->report->get_all_stats_and_analysis($this->quiz, $whichattempts, $whichtries, $groupstudentsjoins, $questions); $qubaids = quiz_statistics_qubaids_condition($this->quiz->id, $groupstudentsjoins, $whichattempts); // We will create some quiz and question stat calculator instances and some response analyser instances, just in order // to check the last analysed time then returned. $quizcalc = new \quiz_statistics\calculator(); // Should not be a delay of more than one second between the calculation of stats above and here. $this->assertTimeCurrent($quizcalc->get_last_calculated_time($qubaids)); $qcalc = new \core_question\statistics\questions\calculator($questions); $this->assertTimeCurrent($qcalc->get_last_calculated_time($qubaids)); if (isset($csvdata['responsecounts'])) { $this->check_response_counts($csvdata['responsecounts'], $qubaids, $questions, $whichtries); } if (isset($csvdata['qstats'])) { $this->check_question_stats($csvdata['qstats'], $questionstats); return array($questions, $quizstats, $questionstats, $qubaids); } return array($questions, $quizstats, $questionstats, $qubaids); }