class CallbackTest

class CallbackTest extends MigrateProcessTestCase {
    
    /**
     * Tests callback with valid "callable".
     *
     * @dataProvider providerCallback
     */
    public function testCallback($callable) : void {
        $configuration = [
            'callable' => $callable,
        ];
        $this->plugin = new Callback($configuration, 'map', []);
        $value = $this->plugin
            ->transform('FooBar', $this->migrateExecutable, $this->row, 'destination_property');
        $this->assertSame('foobar', $value);
    }
    
    /**
     * Data provider for ::testCallback().
     */
    public static function providerCallback() {
        return [
            'function' => [
                'strtolower',
            ],
            'class method' => [
                [
                    self::class,
                    'strtolower',
                ],
            ],
        ];
    }
    
    /**
     * Test callback with valid "callable" and multiple arguments.
     *
     * @dataProvider providerCallbackArray
     */
    public function testCallbackArray($callable, $args, $result) : void {
        $configuration = [
            'callable' => $callable,
            'unpack_source' => TRUE,
        ];
        $this->plugin = new Callback($configuration, 'map', []);
        $value = $this->plugin
            ->transform($args, $this->migrateExecutable, $this->row, 'destination_property');
        $this->assertSame($result, $value);
    }
    
    /**
     * Data provider for ::testCallbackArray().
     */
    public static function providerCallbackArray() {
        return [
            'date format' => [
                'date',
                [
                    'Y-m-d',
                    995328000,
                ],
                '2001-07-17',
            ],
            'rtrim' => [
                'rtrim',
                [
                    'https://www.example.com/',
                    '/',
                ],
                'https://www.example.com',
            ],
            'str_replace' => [
                'str_replace',
                [
                    [
                        'One',
                        'two',
                    ],
                    [
                        '1',
                        '2',
                    ],
                    'One, two, three!',
                ],
                '1, 2, three!',
            ],
            'pi' => [
                'pi',
                [],
                pi(),
            ],
        ];
    }
    
    /**
     * Tests callback exceptions.
     *
     * @param string $message
     *   The expected exception message.
     * @param array $configuration
     *   The plugin configuration being tested.
     * @param string $class
     *   (optional) The expected exception class.
     * @param mixed $args
     *   (optional) Arguments to pass to the transform() method.
     *
     * @dataProvider providerCallbackExceptions
     */
    public function testCallbackExceptions($message, array $configuration, $class = 'InvalidArgumentException', $args = NULL) : void {
        $this->expectException($class);
        $this->expectExceptionMessage($message);
        $this->plugin = new Callback($configuration, 'map', []);
        $this->plugin
            ->transform($args, $this->migrateExecutable, $this->row, 'destination_property');
    }
    
    /**
     * Data provider for ::testCallbackExceptions().
     */
    public static function providerCallbackExceptions() {
        return [
            'not set' => [
                'message' => 'The "callable" must be set.',
                'configuration' => [],
            ],
            'invalid method' => [
                'message' => 'The "callable" must be a valid function or method.',
                'configuration' => [
                    'callable' => 'nonexistent_callable',
                ],
            ],
            'array required' => [
                'message' => "When 'unpack_source' is set, the source must be an array. Instead it was of type 'string'",
                'configuration' => [
                    'callable' => 'count',
                    'unpack_source' => TRUE,
                ],
                'class' => MigrateException::class,
                'args' => 'This string is not an array.',
            ],
        ];
    }
    
    /**
     * Makes a string lowercase for testing purposes.
     *
     * @param string $string
     *   The input string.
     *
     * @return string
     *   The lowercased string.
     *
     * @see \Drupal\Tests\migrate\Unit\process\CallbackTest::providerCallback()
     */
    public static function strToLower($string) {
        return mb_strtolower($string);
    }

}