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<?php
// This file is part of Moodle - https://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 <https://www.gnu.org/licenses/>.

namespace core;

/**
 * Unit tests for parameter management.
 *
 * @package   core
 * @copyright Andrew Lyons <andrew@nicols.co.uk>
 * @license   https://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 * @covers    \core\param
 */
class param_test extends \advanced_testcase {
    /**
     * Test that the Moodle `from_type` method provides canonicalised parameter values.
     *
     * @dataProvider valid_param_provider
     * @param string $type
     * @param param $expected
     */
    public function test_from_type(string $type, param $expected): void {
        $this->assertEquals($expected, param::from_type($type));
    }

/**
     * Data provider containing valid paramter types and their name mapping.
     */
    public static function valid_param_provider(): array {
        return [
            // Standard values.
            [PARAM_RAW, param::RAW],
            [PARAM_RAW_TRIMMED, param::RAW_TRIMMED],
            [PARAM_FLOAT, param::FLOAT],
            [PARAM_INT, param::INT],

// Using enum values (why would you, but...).
            [param::RAW->value, param::RAW],
            [param::RAW_TRIMMED->value, param::RAW_TRIMMED],
            [param::FLOAT->value, param::FLOAT],
            [param::INT->value, param::INT],
            [param::COMPONENT->value, param::COMPONENT],

// Some aliases (canonicalised) parameters.
            [PARAM_INTEGER, param::INT],
            [PARAM_NUMBER, param::FLOAT],
        ];
    }

/**
     * Ensure that we throw an exception if an invalid parameter type is used.
     */
    public function test_from_type_invalid(): void {
        $this->expectException(\coding_exception::class);
        param::from_type('not_a_param');
    }

/**
     * Test that deprecated parameters are marked as such.
     *
     * @dataProvider is_deprecated_provider
     * @param param $param
     * @param bool $expected
     */
    public function test_is_deprecated(param $param, bool $expected): void {
        $this->assertEquals(
            $expected,
            $param->is_deprecated(),
        );
    }

/**
     * Provider for deprecated parameter types.
     *
     * @return array
     */
    public static function is_deprecated_provider(): array {
        return [
            // Some undeprecated parameters.
            [param::RAW, false],
            [param::RAW_TRIMMED, false],
            [param::INT, false],

// Some deprecated parameters.
            [param::INTEGER, true],
            [param::NUMBER, true],
            [param::CLEAN, true],
        ];
    }

/**
     * Test that finally deprecated params throw an exception when cleaning.
     *
     * @dataProvider deprecated_param_provider
     * @param param $params
     */
    public function test_deprecated_params_except(param $param): void {
        $this->expectException(\coding_exception::class);
        $param->clean('foo');
    }

/**
     * Provider for deprecated parameters.
     *
     * @return array
     */
    public static function deprecated_param_provider(): array {
        return array_map(
            fn (param $param): array => [$param],
            array_filter(
                param::cases(),
                function (param $param): bool {
                    if ($attribute = deprecation::from($param)) {
                        return $attribute->emit && $attribute->final;
                    }
                    return false;
                },
            ),
        );
    }
}

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