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<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.

/**
 * @package    core_grades
 * @category   phpunit
 * @copyright  nicolas@moodle.com
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

defined('MOODLE_INTERNAL') || die();

require_once(__DIR__.'/fixtures/lib.php');

class core_grade_grade_testcase extends grade_base_testcase {

public function test_grade_grade() {
        $this->sub_test_grade_grade_construct();
        $this->sub_test_grade_grade_insert();
        $this->sub_test_grade_grade_update();
        $this->sub_test_grade_grade_fetch();
        $this->sub_test_grade_grade_fetch_all();
        $this->sub_test_grade_grade_load_grade_item();
        $this->sub_test_grade_grade_standardise_score();
        $this->sub_test_grade_grade_is_locked();
        $this->sub_test_grade_grade_set_hidden();
        $this->sub_test_grade_grade_is_hidden();
        $this->sub_test_grade_grade_deleted();
    }

protected function sub_test_grade_grade_construct() {
        $params = new stdClass();

$params->itemid = $this->grade_items[0]->id;
        $params->userid = 1;
        $params->rawgrade = 88;
        $params->rawgrademax = 110;
        $params->rawgrademin = 18;

$grade_grade = new grade_grade($params, false);
        $this->assertEquals($params->itemid, $grade_grade->itemid);
        $this->assertEquals($params->rawgrade, $grade_grade->rawgrade);
    }

protected function sub_test_grade_grade_insert() {
        $grade_grade = new grade_grade();
        $this->assertTrue(method_exists($grade_grade, 'insert'));

$grade_grade->itemid = $this->grade_items[0]->id;
        $grade_grade->userid = 10;
        $grade_grade->rawgrade = 88;
        $grade_grade->rawgrademax = 110;
        $grade_grade->rawgrademin = 18;

// Check the grade_item's needsupdate variable first.
        $grade_grade->load_grade_item();
        $this->assertEmpty($grade_grade->grade_item->needsupdate);

$grade_grade->insert();

$last_grade_grade = end($this->grade_grades);

$this->assertEquals($grade_grade->id, $last_grade_grade->id + 1);

// Timecreated will only be set if the grade was submitted by an activity module.
        $this->assertTrue(empty($grade_grade->timecreated));
        // Timemodified will only be set if the grade was submitted by an activity module.
        $this->assertTrue(empty($grade_grade->timemodified));

// Keep our collection the same as is in the database.
        $this->grade_grades[] = $grade_grade;
    }

protected function sub_test_grade_grade_update() {
        $grade_grade = new grade_grade($this->grade_grades[0], false);
        $this->assertTrue(method_exists($grade_grade, 'update'));
    }

protected function sub_test_grade_grade_fetch() {
        $grade_grade = new grade_grade();
        $this->assertTrue(method_exists($grade_grade, 'fetch'));

$grades = grade_grade::fetch(array('id'=>$this->grade_grades[0]->id));
        $this->assertEquals($this->grade_grades[0]->id, $grades->id);
        $this->assertEquals($this->grade_grades[0]->rawgrade, $grades->rawgrade);
    }

protected function sub_test_grade_grade_fetch_all() {
        $grade_grade = new grade_grade();
        $this->assertTrue(method_exists($grade_grade, 'fetch_all'));

$grades = grade_grade::fetch_all(array());
        $this->assertEquals(count($this->grade_grades), count($grades));
    }

protected function sub_test_grade_grade_load_grade_item() {
        $grade_grade = new grade_grade($this->grade_grades[0], false);
        $this->assertTrue(method_exists($grade_grade, 'load_grade_item'));
        $this->assertNull($grade_grade->grade_item);
        $this->assertNotEmpty($grade_grade->itemid);
        $this->assertNotNull($grade_grade->load_grade_item());
        $this->assertNotNull($grade_grade->grade_item);
        $this->assertEquals($this->grade_items[0]->id, $grade_grade->grade_item->id);
    }

protected function sub_test_grade_grade_standardise_score() {
        $this->assertEquals(4, round(grade_grade::standardise_score(6, 0, 7, 0, 5)));
        $this->assertEquals(40, grade_grade::standardise_score(50, 30, 80, 0, 100));
    }

/*
     * Disabling this test: the set_locked() arguments have been modified, rendering these tests useless until they are re-written

protected function test_grade_grade_set_locked() {
        $grade_item = new grade_item($this->grade_items[0]);
        $grade = new grade_grade($grade_item->get_final(1));
        $this->assertTrue(method_exists($grade, 'set_locked'));

$this->assertTrue(empty($grade_item->locked));
        $this->assertTrue(empty($grade->locked));

$this->assertTrue($grade->set_locked(true));
        $this->assertFalse(empty($grade->locked));
        $this->assertTrue($grade->set_locked(false));
        $this->assertTrue(empty($grade->locked));

$this->assertTrue($grade_item->set_locked(true, true));
        $grade = new grade_grade($grade_item->get_final(1));

$this->assertFalse(empty($grade->locked));
        $this->assertFalse($grade->set_locked(true, false));

$this->assertTrue($grade_item->set_locked(true, false));
        $grade = new grade_grade($grade_item->get_final(1));

$this->assertTrue($grade->set_locked(true, false));
    }
    */

protected function sub_test_grade_grade_is_locked() {
        $grade = new grade_grade($this->grade_grades[0], false);
        $this->assertTrue(method_exists($grade, 'is_locked'));

$this->assertFalse($grade->is_locked());
        $grade->locked = time();
        $this->assertTrue($grade->is_locked());
    }

protected function sub_test_grade_grade_set_hidden() {
        $grade = new grade_grade($this->grade_grades[0], false);
        $grade_item = new grade_item($this->grade_items[0], false);
        $this->assertTrue(method_exists($grade, 'set_hidden'));

$this->assertEquals(0, $grade_item->hidden);
        $this->assertEquals(0, $grade->hidden);

$grade->set_hidden(0);
        $this->assertEquals(0, $grade->hidden);

$grade->set_hidden(1);
        $this->assertEquals(1, $grade->hidden);

$grade->set_hidden(0);
        $this->assertEquals(0, $grade->hidden);
    }

protected function sub_test_grade_grade_is_hidden() {
        $grade = new grade_grade($this->grade_grades[0], false);
        $this->assertTrue(method_exists($grade, 'is_hidden'));

$this->assertFalse($grade->is_hidden());
        $grade->hidden = 1;
        $this->assertTrue($grade->is_hidden());

$grade->hidden = time()-666;
        $this->assertFalse($grade->is_hidden());

$grade->hidden = time()+666;
        $this->assertTrue($grade->is_hidden());
    }

public function test_flatten_dependencies() {
        // First test a simple normal case.
        $a = array(1 => array(2, 3), 2 => array(), 3 => array(4), 4 => array());
        $b = array();
        $expecteda = array(1 => array(2, 3, 4), 2 => array(), 3 => array(4), 4 => array());
        $expectedb = array(1 => 1);

test_grade_grade_flatten_dependencies_array::test_flatten_dependencies_array($a, $b);
        $this->assertSame($expecteda, $a);
        $this->assertSame($expectedb, $b);

// Edge case - empty arrays.
        $a = $b = $expecteda = $expectedb = array();

test_grade_grade_flatten_dependencies_array::test_flatten_dependencies_array($a, $b);
        $this->assertSame($expecteda, $a);
        $this->assertSame($expectedb, $b);

// Circular dependency.
        $a = array(1 => array(2), 2 => array(3), 3 => array(1));
        $b = array();
        $expecteda = array(1 => array(1, 2, 3), 2 => array(1, 2, 3), 3 => array(1, 2, 3));

test_grade_grade_flatten_dependencies_array::test_flatten_dependencies_array($a, $b);
        $this->assertSame($expecteda, $a);
        // Note - we don't test the depth when we got circular dependencies - the main thing we wanted to test was that there was
        // no ka-boom. The result would be hard to understand and doesn't matter.

// Circular dependency 2.
        $a = array(1 => array(2), 2 => array(3), 3 => array(4), 4 => array(2, 1));
        $b = array();
        $expecteda = array(1 => array(1, 2, 3, 4), 2 => array(1, 2, 3, 4), 3 => array(1, 2, 3, 4), 4 => array(1, 2, 3, 4));

test_grade_grade_flatten_dependencies_array::test_flatten_dependencies_array($a, $b);
        $this->assertSame($expecteda, $a);
    }

public function test_grade_grade_min_max() {
        global $CFG;
        $initialminmaxtouse = $CFG->grade_minmaxtouse;

$this->setAdminUser();
        $course = $this->getDataGenerator()->create_course();
        $user = $this->getDataGenerator()->create_user();
        $assignrecord = $this->getDataGenerator()->create_module('assign', array('course' => $course, 'grade' => 100));
        $cm = get_coursemodule_from_instance('assign', $assignrecord->id);
        $assigncontext = context_module::instance($cm->id);
        $assign = new assign($assigncontext, $cm, $course);

// Fetch the assignment item.
        $giparams = array('itemtype' => 'mod', 'itemmodule' => 'assign', 'iteminstance' => $assignrecord->id,
                'courseid' => $course->id, 'itemnumber' => 0);
        $gi = grade_item::fetch($giparams);
        $this->assertEquals(0, $gi->grademin);
        $this->assertEquals(100, $gi->grademax);

// Give a grade to the student.
        $usergrade = $assign->get_user_grade($user->id, true);
        $usergrade->grade = 10;
        $assign->update_grade($usergrade);

// Check the grade stored in gradebook.
        $gg = grade_grade::fetch(array('userid' => $user->id, 'itemid' => $gi->id));
        $this->assertEquals(10, $gg->rawgrade);
        $this->assertEquals(0, $gg->get_grade_min());
        $this->assertEquals(100, $gg->get_grade_max());

// Change the min/max grade of the item.
        $gi->grademax = 50;
        $gi->grademin = 2;
        $gi->update();

// Fetch the updated item.
        $gi = grade_item::fetch($giparams);

// Now check the grade grade min/max with system setting.
        $CFG->grade_minmaxtouse = GRADE_MIN_MAX_FROM_GRADE_ITEM;
        grade_set_setting($course->id, 'minmaxtouse', null); // Ensure no course setting.

$gg = grade_grade::fetch(array('userid' => $user->id, 'itemid' => $gi->id));
        $this->assertEquals(2, $gg->get_grade_min());
        $this->assertEquals(50, $gg->get_grade_max());

// Now with other system setting.
        $CFG->grade_minmaxtouse = GRADE_MIN_MAX_FROM_GRADE_GRADE;
        grade_set_setting($course->id, 'minmaxtouse', null); // Ensure no course setting, and reset static cache.
        $gg = grade_grade::fetch(array('userid' => $user->id, 'itemid' => $gi->id));
        $this->assertEquals(0, $gg->get_grade_min());
        $this->assertEquals(100, $gg->get_grade_max());

// Now with overriden setting in course.
        $CFG->grade_minmaxtouse = GRADE_MIN_MAX_FROM_GRADE_ITEM;
        grade_set_setting($course->id, 'minmaxtouse', GRADE_MIN_MAX_FROM_GRADE_GRADE);
        $gg = grade_grade::fetch(array('userid' => $user->id, 'itemid' => $gi->id));
        $this->assertEquals(0, $gg->get_grade_min());
        $this->assertEquals(100, $gg->get_grade_max());

$CFG->grade_minmaxtouse = GRADE_MIN_MAX_FROM_GRADE_GRADE;
        grade_set_setting($course->id, 'minmaxtouse', GRADE_MIN_MAX_FROM_GRADE_ITEM);
        $gg = grade_grade::fetch(array('userid' => $user->id, 'itemid' => $gi->id));
        $this->assertEquals(2, $gg->get_grade_min());
        $this->assertEquals(50, $gg->get_grade_max());

$CFG->grade_minmaxtouse = $initialminmaxtouse;
    }

public function test_grade_grade_min_max_with_course_item() {
        global $CFG, $DB;
        $initialminmaxtouse = $CFG->grade_minmaxtouse;

$this->setAdminUser();
        $course = $this->getDataGenerator()->create_course();
        $user = $this->getDataGenerator()->create_user();
        $gi = grade_item::fetch_course_item($course->id);

// Fetch the category item.
        $this->assertEquals(0, $gi->grademin);
        $this->assertEquals(100, $gi->grademax);

// Give a grade to the student.
        $gi->update_final_grade($user->id, 10);

// Check the grade min/max stored in gradebook.
        $gg = grade_grade::fetch(array('userid' => $user->id, 'itemid' => $gi->id));
        $this->assertEquals(0, $gg->get_grade_min());
        $this->assertEquals(100, $gg->get_grade_max());

// Change the min/max grade of the item.
        $gi->grademin = 2;
        $gi->grademax = 50;
        $gi->update();

// Fetch the updated item.
        $gi = grade_item::fetch_course_item($course->id);

$gg = grade_grade::fetch(array('userid' => $user->id, 'itemid' => $gi->id));
        $this->assertEquals(0, $gg->get_grade_min());
        $this->assertEquals(100, $gg->get_grade_max());

$CFG->grade_minmaxtouse = GRADE_MIN_MAX_FROM_GRADE_GRADE;
        grade_set_setting($course->id, 'minmaxtouse', GRADE_MIN_MAX_FROM_GRADE_ITEM);
        $gg = grade_grade::fetch(array('userid' => $user->id, 'itemid' => $gi->id));
        $this->assertEquals(0, $gg->get_grade_min());
        $this->assertEquals(100, $gg->get_grade_max());

$CFG->grade_minmaxtouse = $initialminmaxtouse;
    }

public function test_grade_grade_min_max_with_category_item() {
        global $CFG, $DB;
        $initialminmaxtouse = $CFG->grade_minmaxtouse;

$this->setAdminUser();
        $course = $this->getDataGenerator()->create_course();
        $user = $this->getDataGenerator()->create_user();
        $coursegi = grade_item::fetch_course_item($course->id);

// Create a category item.
        $gc = new grade_category(array('courseid' => $course->id, 'fullname' => 'test'), false);
        $gc->insert();
        $gi = $gc->get_grade_item();
        $gi->grademax = 100;
        $gi->grademin = 0;
        $gi->update();

// Fetch the category item.
        $giparams = array('itemtype' => 'category', 'iteminstance' => $gc->id);
        $gi = grade_item::fetch($giparams);
        $this->assertEquals(0, $gi->grademin);
        $this->assertEquals(100, $gi->grademax);

// Give a grade to the student.
        $gi->update_final_grade($user->id, 10);

// Change the min/max grade of the item.
        $gi->grademin = 2;
        $gi->grademax = 50;
        $gi->update();

// Fetch the updated item.
        $gi = grade_item::fetch($giparams);

$gg = grade_grade::fetch(array('userid' => $user->id, 'itemid' => $gi->id));
        $this->assertEquals(0, $gg->get_grade_min());
        $this->assertEquals(100, $gg->get_grade_max());

$CFG->grade_minmaxtouse = GRADE_MIN_MAX_FROM_GRADE_GRADE;
        grade_set_setting($course->id, 'minmaxtouse', GRADE_MIN_MAX_FROM_GRADE_ITEM);
        $gg = grade_grade::fetch(array('userid' => $user->id, 'itemid' => $gi->id));
        $this->assertEquals(0, $gg->get_grade_min());
        $this->assertEquals(100, $gg->get_grade_max());

$CFG->grade_minmaxtouse = $initialminmaxtouse;
    }

/**
     * Tests when a grade_grade has been deleted.
     */
    public function sub_test_grade_grade_deleted() {
        $dg = $this->getDataGenerator();

// Create the data we need for the tests.
        $fs = new file_storage();
        $u1 = $dg->create_user();
        $c1 = $dg->create_course();
        $a1 = $dg->create_module('assign', ['course' => $c1->id]);
        $a1context = context_module::instance($a1->cmid);

$gi = new grade_item($dg->create_grade_item(
            [
                'courseid' => $c1->id,
                'itemtype' => 'mod',
                'itemmodule' => 'assign',
                'iteminstance' => $a1->id
            ]
        ), false);

// Add feedback files to copy as our update.
        $this->add_feedback_file_to_copy();

$grades['feedback'] = 'Nice feedback!';
        $grades['feedbackformat'] = FORMAT_MOODLE;
        $grades['feedbackfiles'] = [
            'contextid' => 1,
            'component' => 'test',
            'filearea' => 'testarea',
            'itemid' => 1
        ];

$grades['userid'] = $u1->id;
        grade_update('mod/assign', $gi->courseid, $gi->itemtype, $gi->itemmodule, $gi->iteminstance,
            $gi->itemnumber, $grades);

// Feedback file area.
        $files = $fs->get_area_files($a1context->id, GRADE_FILE_COMPONENT, GRADE_FEEDBACK_FILEAREA);
        $this->assertEquals(2, count($files));

// History file area.
        $files = $fs->get_area_files($a1context->id, GRADE_FILE_COMPONENT, GRADE_HISTORY_FEEDBACK_FILEAREA);
        $this->assertEquals(2, count($files));

$gg = grade_grade::fetch(array('userid' => $u1->id, 'itemid' => $gi->id));

$gg->delete();

// Feedback file area.
        $files = $fs->get_area_files($a1context->id, GRADE_FILE_COMPONENT, GRADE_FEEDBACK_FILEAREA);
        $this->assertEquals(0, count($files));

// History file area.
        $files = $fs->get_area_files($a1context->id, GRADE_FILE_COMPONENT, GRADE_HISTORY_FEEDBACK_FILEAREA);
        $this->assertEquals(2, count($files));
    }

/**
     * Creates a feedback file to copy to the gradebook area.
     */
    private function add_feedback_file_to_copy() {
        $dummy = array(
            'contextid' => 1,
            'component' => 'test',
            'filearea' => 'testarea',
            'itemid' => 1,
            'filepath' => '/',
            'filename' => 'feedback1.txt'
        );

$fs = get_file_storage();
        $fs->create_file_from_string($dummy, '');
    }
}