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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/>.

/**
 * Unit tests for core_grades\component_gradeitems;
 *
 * @package   core_grades
 * @category  test
 * @copyright 2019 Andrew Nicols <andrew@nicols.co.uk>
 * @license   http://www.gnu.org/copyleft/gpl.html GNU Public License
 */

declare(strict_types = 1);

namespace core_grades {

use advanced_testcase;
    use core_grades\component_gradeitems;
    use coding_exception;

/**
     * Unit tests for core_grades\component_gradeitems;
     *
     * @package   core_grades
     * @category  test
     * @copyright 2019 Andrew Nicols <andrew@nicols.co.uk>
     * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
     */
    class component_gradeitems_test extends advanced_testcase {

/**
         * Ensure that a component which does not implement the mapping class excepts.
         */
        public function test_get_itemname_mapping_for_component_does_not_exist(): void {
            $mappings = component_gradeitems::get_itemname_mapping_for_component('invalid_component');
            $this->assertIsArray($mappings);
            $this->assertCount(1, $mappings);
            $this->assertArrayHasKey(0, $mappings);
        }

/**
         * Ensure that a component which does not implement the mapping class correctly excepts.
         */
        public function test_get_itemname_mapping_for_valid_component_invalid_mapping(): void {
            $this->expectException(coding_exception::class);
            component_gradeitems::get_itemname_mapping_for_component('tests\core_grades\component_gradeitems\invalid');
        }

/**
         * Ensure that a component which implements the mapping class correctly eets the correct set of mappings.
         */
        public function test_get_itemname_mapping_for_valid_component_valid_mapping(): void {
            $mapping = component_gradeitems::get_itemname_mapping_for_component('tests\core_grades\component_gradeitems\valid');
            $this->assertIsArray($mapping);
            $this->assertEquals([
                0 => 'rating',
                1 => 'someother',
            ], $mapping);
        }

/**
         * Data provider for is_valid_itemname tests.
         *
         * @return array
         */
        public function is_valid_itemname_provider(): array {
            return [
                'valid' => [
                    'someother',
                    true,
                ],
                'validnotadvanced' => [
                    'rating',
                    true,
                ],
                'invalid' => [
                    'doesnotexist',
                    false,
                ],
            ];
        }

/**
         * Ensure that a component implementing advanced grading returns the correct areas.
         *
         * @dataProvider is_valid_itemname_provider
         * @param string $itemname
         * @param bool $isadvanced
         */
        public function test_is_valid_itemname(string $itemname, bool $isadvanced): void {
            $this->assertEquals(
                $isadvanced,
                component_gradeitems::is_valid_itemname('tests\core_grades\component_gradeitems\valid_and_advanced', $itemname)
            );
        }

/**
         * Ensure that a component which does not implement the advancedgrading interface returns this.
         */
        public function test_defines_advancedgrading_itemnames_for_component_does_not_exist(): void {
            $this->assertFalse(component_gradeitems::defines_advancedgrading_itemnames_for_component('invalid_component'));
        }

/**
         * Ensure that a component which does not implement the advancedgrading interface returns this.
         */
        public function test_defines_advancedgrading_itemnames_for_component_no_interfaces(): void {
            $this->assertFalse(component_gradeitems::defines_advancedgrading_itemnames_for_component('tests\core_grades\component_gradeitems\invalid'));
        }

/**
         * Ensure that a component which implements the item mapping but not implement the advancedgrading interface returns this.
         */
        public function test_defines_advancedgrading_itemnames_for_component_grading_no_interface(): void {
            $this->assertFalse(component_gradeitems::defines_advancedgrading_itemnames_for_component('tests\core_grades\component_gradeitems\valid'));
        }

/**
         * Ensure that a component which implements the item mapping but not implement the advancedgrading interface returns this.
         */
        public function test_defines_advancedgrading_itemnames_for_component_grading_has_interface(): void {
            $this->assertTrue(component_gradeitems::defines_advancedgrading_itemnames_for_component('tests\core_grades\component_gradeitems\valid_and_advanced'));
        }

/**
         * Ensure that a component which does not implement the advancedgrading interface returns this.
         */
        public function test_get_advancedgrading_itemnames_for_component_does_not_exist(): void {
            $this->expectException(coding_exception::class);
            component_gradeitems::get_advancedgrading_itemnames_for_component('invalid_component');
        }

/**
         * Ensure that a component which does not implement the advancedgrading interface returns this.
         */
        public function test_get_advancedgrading_itemnames_for_component_no_interfaces(): void {
            $this->expectException(coding_exception::class);
            component_gradeitems::get_advancedgrading_itemnames_for_component('tests\core_grades\component_gradeitems\invalid');
        }

/**
         * Ensure that a component which implements the item mapping but not implement the advancedgrading interface returns this.
         */
        public function test_get_advancedgrading_itemnames_for_component_grading_no_interface(): void {
            $this->expectException(coding_exception::class);
            component_gradeitems::get_advancedgrading_itemnames_for_component('tests\core_grades\component_gradeitems\valid');
        }

/**
         * Ensure that a component implementing advanced grading returns the correct areas.
         */
        public function test_get_advancedgrading_itemnames_for_component(): void {
            $areas = component_gradeitems::get_advancedgrading_itemnames_for_component('tests\core_grades\component_gradeitems\valid_and_advanced');
            $this->assertEquals(['someother'], $areas);
        }

/**
         * Data provider for is_advancedgrading_itemname tests.
         *
         * @return array
         */
        public function is_advancedgrading_itemname_provider(): array {
            return [
                'valid' => [
                    'someother',
                    true,
                ],
                'validnotadvanced' => [
                    'rating',
                    false,
                ],
                'invalid' => [
                    'doesnotexist',
                    false,
                ],
            ];
        }

/**
         * Ensure that a component implementing advanced grading returns the correct areas.
         *
         * @dataProvider is_advancedgrading_itemname_provider
         * @param string $itemname
         * @param bool $isadvanced
         */
        public function test_is_advancedgrading_itemname(string $itemname, bool $isadvanced): void {
            $this->assertEquals(
                $isadvanced,
                component_gradeitems::is_advancedgrading_itemname('tests\core_grades\component_gradeitems\valid_and_advanced', $itemname)
            );
        }

/**
         * Data provider for get_field_name_for_itemnumber.
         *
         * @return array
         */
        public function get_field_name_for_itemnumber_provider(): array {
            return [
                'Valid itemnumber 0 case 1' => [
                    0,
                    'gradecat',
                    'gradecat',
                ],
                'Valid itemnumber 0 case 2' => [
                    0,
                    'melon',
                    'melon',
                ],
                'Valid itemnumber 1 case 1' => [
                    1,
                    'gradecat',
                    'gradecat_someother',
                ],
                'Valid itemnumber 1 case 2' => [
                    1,
                    'melon',
                    'melon_someother',
                ],
            ];
        }

/**
         * Ensure that valid field names are correctly mapped for a valid component.
         *
         * @dataProvider get_field_name_for_itemnumber_provider
         * @param int $itemnumber The item itemnumber to test
         * @param string $fieldname The field name being translated
         * @param string $expected The expected value
         */
        public function test_get_field_name_for_itemnumber(int $itemnumber, string $fieldname, string $expected): void {
            $component = 'tests\core_grades\component_gradeitems\valid';
            $this->assertEquals($expected, component_gradeitems::get_field_name_for_itemnumber($component, $itemnumber, $fieldname));
        }

/**
         * Ensure that an invalid itemnumber does not provide any field name.
         */
        public function test_get_field_name_for_itemnumber_invalid_itemnumber(): void {
            $component = 'tests\core_grades\component_gradeitems\valid';

$this->expectException(coding_exception::class);
            component_gradeitems::get_field_name_for_itemnumber($component, 100, 'gradecat');
        }

/**
         * Ensure that a component which does not define a mapping can still get a mapping for itemnumber 0.
         */
        public function test_get_field_name_for_itemnumber_component_not_defining_mapping_itemnumber_zero(): void {
            $component = 'tests\core_grades\othervalid';

$this->assertEquals('gradecat', component_gradeitems::get_field_name_for_itemnumber($component, 0, 'gradecat'));
        }

/**
         * Ensure that a component which does not define a mapping cannot get a mapping for itemnumber 1+.
         */
        public function test_get_field_name_for_itemnumber_component_not_defining_mapping_itemnumber_nonzero(): void {
            $component = 'tests\core_grades\othervalid';

$this->expectException(coding_exception::class);
            component_gradeitems::get_field_name_for_itemnumber($component, 100, 'gradecat');
        }

/**
         * Ensure that a component which incorrectly defines a mapping cannot get a mapping for itemnumber 1+.
         */
        public function test_get_field_name_for_itemnumber_component_invalid_mapping_itemnumber_nonzero(): void {
            $component = 'tests\core_grades\component_gradeitems\invalid';

$this->expectException(coding_exception::class);
            component_gradeitems::get_field_name_for_itemnumber($component, 100, 'gradecat');
        }

/**
         * Data provider for get_field_name_for_itemname.
         *
         * @return array
         */
        public function get_field_name_for_itemname_provider(): array {
            return [
                'Empty itemname empty case 1' => [
                    '',
                    'gradecat',
                    'gradecat',
                ],
                'Empty itemname empty case 2' => [
                    '',
                    'melon',
                    'melon',
                ],
                'First itemname empty case 1' => [
                    'rating',
                    'gradecat',
                    'gradecat',
                ],
                'First itemname empty case 2' => [
                    'rating',
                    'melon',
                    'melon',
                ],
                'Other itemname empty case 1' => [
                    'someother',
                    'gradecat',
                    'gradecat_someother',
                ],
                'Other itemname empty case 2' => [
                    'someother',
                    'melon',
                    'melon_someother',
                ],
            ];
        }

/**
         * Ensure that valid field names are correctly mapped for a valid component.
         *
         * @dataProvider get_field_name_for_itemname_provider
         * @param string $itemname The item itemname to test
         * @param string $fieldname The field name being translated
         * @param string $expected The expected value
         */
        public function test_get_field_name_for_itemname(string $itemname, string $fieldname, string $expected): void {
            $component = 'tests\core_grades\component_gradeitems\valid';
            $this->assertEquals($expected, component_gradeitems::get_field_name_for_itemname($component, $itemname, $fieldname));
        }

/**
         * Ensure that an invalid itemname does not provide any field name.
         */
        public function test_get_field_name_for_itemname_invalid_itemname(): void {
            $component = 'tests\core_grades\component_gradeitems\valid';

$this->expectException(coding_exception::class);
            component_gradeitems::get_field_name_for_itemname($component, 'typo', 'gradecat');
        }

/**
         * Ensure that an empty itemname provides a matching fieldname regardless of whether the component exists or
         * not.
         */
        public function test_get_field_name_for_itemname_not_defining_mapping_empty_name(): void {
            $component = 'tests\core_grades\othervalid';

$this->assertEquals('gradecat', component_gradeitems::get_field_name_for_itemname($component, '', 'gradecat'));
        }

/**
         * Ensure that an valid component with some itemname excepts.
         */
        public function test_get_field_name_for_itemname_not_defining_mapping_with_name(): void {
            $component = 'tests\core_grades\othervalid';

$this->expectException(coding_exception::class);
            component_gradeitems::get_field_name_for_itemname($component, 'example', 'gradecat');
        }

/**
         * Ensure that an empty itemname provides a matching fieldname even if the mapping is invalid.
         */
        public function test_get_field_name_for_itemname_invalid_mapping_empty_name(): void {
            $component = 'tests\core_grades\component_gradeitems\invalid';

$this->assertEquals('gradecat', component_gradeitems::get_field_name_for_itemname($component, '', 'gradecat'));
        }

/**
         * Ensure that an invalid mapping with some itemname excepts.
         */
        public function test_get_field_name_for_itemname_invalid_mapping_with_name(): void {
            $component = 'tests\core_grades\component_gradeitems\invalid';

$this->expectException(coding_exception::class);
            component_gradeitems::get_field_name_for_itemname($component, 'example', 'gradecat');
        }

/**
         * Data provider for get_itemname_from_itemnumber.
         *
         * @return array
         */
        public function get_itemname_from_itemnumber_provider(): array {
            return [
                'Valid itemnumber 0' => [
                    0,
                    '',
                ],
                'Valid itemnumber 1' => [
                    1,
                    'someother',
                ],
            ];
        }

/**
         * Ensure that item names are correctly mapped for a valid component.
         *
         * @dataProvider get_itemname_from_itemnumber_provider
         * @param int $itemnumber The item itemnumber to test
         * @param string $expected The expected value
         */
        public function test_get_itemname_from_itemnumber(int $itemnumber, string $expected): void {
            $component = 'tests\core_grades\component_gradeitems\valid';
            $this->assertEquals($expected, component_gradeitems::get_itemname_from_itemnumber($component, $itemnumber));
        }

/**
         * Ensure that an itemnumber over 1000 is treated as itemnumber 0 for the purpose of outcomes.
         */
        public function test_get_itemname_from_itemnumber_outcome_itemnumber(): void {
            $component = 'tests\core_grades\component_gradeitems\valid';

$this->assertEquals('', component_gradeitems::get_itemname_from_itemnumber($component, 1000));
        }

/**
         * Ensure that an invalid itemnumber does not provide any field name.
         */
        public function test_get_itemname_from_itemnumber_invalid_itemnumber(): void {
            $component = 'tests\core_grades\component_gradeitems\valid';

$this->expectException(coding_exception::class);
            component_gradeitems::get_itemname_from_itemnumber($component, 100);
        }

/**
         * Ensure that a component which does not define a mapping can still get a mapping for itemnumber 0.
         */
        public function test_get_itemname_from_itemnumber_component_not_defining_mapping_itemnumber_zero(): void {
            $component = 'tests\core_grades\othervalid';

$this->assertEquals('', component_gradeitems::get_itemname_from_itemnumber($component, 0));
        }

/**
         * Ensure that a component which does not define a mapping cannot get a mapping for itemnumber 1+.
         */
        public function test_get_itemname_from_itemnumber_component_not_defining_mapping_itemnumber_nonzero(): void {
            $component = 'tests\core_grades\othervalid';

$this->expectException(coding_exception::class);
            component_gradeitems::get_itemname_from_itemnumber($component, 100);
        }

/**
         * Ensure that a component which incorrectly defines a mapping cannot get a mapping for itemnumber 1+.
         */
        public function test_get_itemname_from_itemnumber_component_invalid_mapping_itemnumber_nonzero(): void {
            $component = 'tests\core_grades\component_gradeitems\invalid';

$this->expectException(coding_exception::class);
            component_gradeitems::get_itemname_from_itemnumber($component, 100);
        }

/**
         * Data provider for get_itemname_from_itemnumber.
         *
         * @return array
         */
        public function get_itemnumber_from_itemname_provider(): array {
            return [
                'Empty itemname empty' => [
                    '',
                    0,
                ],
                'First itemname empty' => [
                    'rating',
                    0,
                ],
                'Other itemname empty' => [
                    'someother',
                    1,
                ],
            ];
        }

/**
         * Ensure that valid item names are correctly mapped for a valid component.
         *
         * @dataProvider get_itemnumber_from_itemname_provider
         * @param string $itemname The item itemname to test
         * @param int $expected The expected value
         */
        public function test_get_itemnumber_from_itemname(string $itemname, int $expected): void {
            $component = 'tests\core_grades\component_gradeitems\valid';
            $this->assertEquals($expected, component_gradeitems::get_itemnumber_from_itemname($component, $itemname));
        }

/**
         * Ensure that an invalid itemname excepts.
         */
        public function test_get_itemnumber_from_itemname_invalid_itemname(): void {
            $component = 'tests\core_grades\component_gradeitems\valid';

$this->expectException(coding_exception::class);
            component_gradeitems::get_itemnumber_from_itemname($component, 'typo');
        }

/**
         * Ensure that an empty itemname provides a correct itemnumber regardless of whether the component exists or
         * not.
         */
        public function test_get_itemnumber_from_itemname_not_defining_mapping_empty_name(): void {
            $component = 'tests\core_grades\component_gradeitems\othervalid';

$this->assertEquals(0, component_gradeitems::get_itemnumber_from_itemname($component, ''));
        }

/**
         * Ensure that an valid component with some itemname excepts.
         */
        public function test_get_itemnumber_from_itemname_not_defining_mapping_with_name(): void {
            $component = 'tests\core_grades\component_gradeitems\othervalid';

$this->expectException(coding_exception::class);
            component_gradeitems::get_itemnumber_from_itemname($component, 'example');
        }

/**
         * Ensure that an empty itemname provides a matching fieldname even if the mapping is invalid.
         */
        public function test_get_itemnumber_from_itemname_invalid_mapping_empty_name(): void {
            $component = 'tests\core_grades\component_gradeitems\invalid';

$this->assertEquals(0, component_gradeitems::get_itemnumber_from_itemname($component, ''));
        }

/**
         * Ensure that an invalid mapping with some itemname excepts.
         */
        public function test_get_itemnumber_from_itemname_invalid_mapping_with_name(): void {
            $component = 'tests\core_grades\component_gradeitems\invalid';

$this->expectException(coding_exception::class);
            component_gradeitems::get_itemnumber_from_itemname($component, 'example');
        }
    }
}

namespace tests\core_grades\component_gradeitems\valid\grades {
    use core_grades\local\gradeitem\itemnumber_mapping;

/**
     * Valid class for testing mappings.
     *
     * @package   core_grades
     * @category  test
     * @copyright 2019 Andrew Nicols <andrew@nicols.co.uk>
     * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
     */
    class gradeitems implements itemnumber_mapping {
        /**
         * Get the grade item mapping of item number to item name.
         *
         * @return array
         */
        public static function get_itemname_mapping_for_component(): array {
            return [
                0 => 'rating',
                1 => 'someother',
            ];
        }
    }
}

namespace tests\core_grades\component_gradeitems\valid_and_advanced\grades {
    use core_grades\local\gradeitem\itemnumber_mapping;
    use core_grades\local\gradeitem\advancedgrading_mapping;

/**
     * Valid class for testing mappings.
     *
     * @package   core_grades
     * @category  test
     * @copyright 2019 Andrew Nicols <andrew@nicols.co.uk>
     * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
     */
    class gradeitems implements itemnumber_mapping, advancedgrading_mapping {
        /**
         * Get the grade item mapping of item number to item name.
         *
         * @return array
         */
        public static function get_itemname_mapping_for_component(): array {
            return [
                0 => 'rating',
                1 => 'someother',
            ];
        }

/**
         * Get the list of items which define advanced grading.
         *
         * @return array
         */
        public static function get_advancedgrading_itemnames(): array {
            return [
                'someother',
            ];
        }
    }
}

namespace tests\core_grades\component_gradeitems\invalid\grades {
    use core_grades\local\gradeitem\itemnumber_mapping;

/**
     * Invalid class for testing mappings.
     *
     * @package   core_grades
     * @category  test
     * @copyright 2019 Andrew Nicols <andrew@nicols.co.uk>
     * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
     */
    class gradeitems {
        /**
         * Get the grade item mapping of item number to item name.
         *
         * @return array
         */
        public static function get_itemname_mapping_for_component(): array {
            return [
                0 => 'rating',
                1 => 'someother',
            ];
        }

/**
         * Get the list of items which define advanced grading.
         *
         * @return array
         */
        public static function get_advancedgrading_itemnames(): array {
            return [
                1 => 'someother',
            ];
        }
    }
}

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