class ValidatorTest

class ValidatorTest extends FileManagedUnitTestBase {
    
    /**
     * An image file.
     *
     * @var \Drupal\file\FileInterface
     */
    protected $image;
    
    /**
     * A file which is not an image.
     *
     * @var \Drupal\file\Entity\File
     */
    protected $nonImage;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $this->image = File::create();
        $this->image
            ->setFileUri('core/misc/druplicon.png');
        
        /** @var \Drupal\Core\File\FileSystemInterface $file_system */
        $file_system = \Drupal::service('file_system');
        $this->image
            ->setFilename($file_system->basename($this->image
            ->getFileUri()));
        $this->nonImage = File::create();
        $this->nonImage
            ->setFileUri('core/assets/vendor/jquery/jquery.min.js');
        $this->nonImage
            ->setFilename($file_system->basename($this->nonImage
            ->getFileUri()));
    }
    
    /**
     * Tests the file_validate_extensions() function.
     */
    public function testFileValidateExtensions() {
        $file = File::create([
            'filename' => 'asdf.txt',
        ]);
        $errors = file_validate_extensions($file, 'asdf txt pork');
        $this->assertCount(0, $errors, 'Valid extension accepted.');
        $file->setFilename('asdf.txt');
        $errors = file_validate_extensions($file, 'exe png');
        $this->assertCount(1, $errors, 'Invalid extension blocked.');
    }
    
    /**
     * Tests the file_validate_extensions() function.
     *
     * @param array $file_properties
     *   The properties of the file being validated.
     * @param string[] $extensions
     *   An array of the allowed file extensions.
     * @param string[] $expected_errors
     *   The expected error messages as string.
     *
     * @dataProvider providerTestFileValidateExtensionsOnUri
     */
    public function testFileValidateExtensionsOnUri(array $file_properties, array $extensions, array $expected_errors) {
        $file = File::create($file_properties);
        $actual_errors = file_validate_extensions($file, implode(' ', $extensions));
        $actual_errors_as_string = array_map(function ($error_message) {
            return (string) $error_message;
        }, $actual_errors);
        $this->assertEquals($expected_errors, $actual_errors_as_string);
    }
    
    /**
     * Data provider for ::testFileValidateExtensionsOnUri.
     *
     * @return array[][]
     *   The test cases.
     */
    public function providerTestFileValidateExtensionsOnUri() : array {
        $temporary_txt_file_properties = [
            'filename' => 'asdf.txt',
            'uri' => 'temporary://asdf',
            'status' => 0,
        ];
        $permanent_txt_file_properties = [
            'filename' => 'asdf.txt',
            'uri' => 'public://asdf_0.txt',
            'status' => 1,
        ];
        $permanent_png_file_properties = [
            'filename' => 'The Druplicon',
            'uri' => 'public://druplicon.png',
            'status' => 1,
        ];
        return [
            'Temporary txt validated with "asdf", "txt", "pork"' => [
                'File properties' => $temporary_txt_file_properties,
                'Allowed_extensions' => [
                    'asdf',
                    'txt',
                    'pork',
                ],
                'Expected errors' => [],
            ],
            'Temporary txt validated with "exe" and "png"' => [
                'File properties' => $temporary_txt_file_properties,
                'Allowed_extensions' => [
                    'exe',
                    'png',
                ],
                'Expected errors' => [
                    'Only files with the following extensions are allowed: <em class="placeholder">exe png</em>.',
                ],
            ],
            'Permanent txt validated with "asdf", "txt", "pork"' => [
                'File properties' => $permanent_txt_file_properties,
                'Allowed_extensions' => [
                    'asdf',
                    'txt',
                    'pork',
                ],
                'Expected errors' => [],
            ],
            'Permanent txt validated with "exe" and "png"' => [
                'File properties' => $permanent_txt_file_properties,
                'Allowed_extensions' => [
                    'exe',
                    'png',
                ],
                'Expected errors' => [
                    'Only files with the following extensions are allowed: <em class="placeholder">exe png</em>.',
                ],
            ],
            'Permanent png validated with "png", "gif", "jpg", "jpeg"' => [
                'File properties' => $permanent_png_file_properties,
                'Allowed_extensions' => [
                    'png',
                    'gif',
                    'jpg',
                    'jpeg',
                ],
                'Expected errors' => [],
            ],
            'Permanent png validated with "exe" and "txt"' => [
                'File properties' => $permanent_png_file_properties,
                'Allowed_extensions' => [
                    'exe',
                    'txt',
                ],
                'Expected errors' => [
                    'Only files with the following extensions are allowed: <em class="placeholder">exe txt</em>.',
                ],
            ],
        ];
    }
    
    /**
     * This ensures a specific file is actually an image.
     */
    public function testFileValidateIsImage() {
        $this->assertFileExists($this->image
            ->getFileUri());
        $errors = file_validate_is_image($this->image);
        $this->assertCount(0, $errors, 'No error reported for our image file.');
        $this->assertFileExists($this->nonImage
            ->getFileUri());
        $errors = file_validate_is_image($this->nonImage);
        $this->assertCount(1, $errors, 'An error reported for our non-image file.');
    }
    
    /**
     * This ensures the resolution of a specific file is within bounds.
     *
     * The image will be resized if it's too large.
     */
    public function testFileValidateImageResolution() {
        // Non-images.
        $errors = file_validate_image_resolution($this->nonImage);
        $this->assertCount(0, $errors, 'Should not get any errors for a non-image file.');
        $errors = file_validate_image_resolution($this->nonImage, '50x50', '100x100');
        $this->assertCount(0, $errors, 'Do not check the resolution on non files.');
        // Minimum size.
        $errors = file_validate_image_resolution($this->image);
        $this->assertCount(0, $errors, 'No errors for an image when there is no minimum or maximum resolution.');
        $errors = file_validate_image_resolution($this->image, 0, '200x1');
        $this->assertCount(1, $errors, 'Got an error for an image that was not wide enough.');
        $errors = file_validate_image_resolution($this->image, 0, '1x200');
        $this->assertCount(1, $errors, 'Got an error for an image that was not tall enough.');
        $errors = file_validate_image_resolution($this->image, 0, '200x200');
        $this->assertCount(1, $errors, 'Small images report an error.');
        // Maximum size.
        if ($this->container
            ->get('image.factory')
            ->getToolkitId()) {
            // Copy the image so that the original doesn't get resized.
            copy('core/misc/druplicon.png', 'temporary://druplicon.png');
            $this->image
                ->setFileUri('temporary://druplicon.png');
            $errors = file_validate_image_resolution($this->image, '10x5');
            $this->assertCount(0, $errors, 'No errors should be reported when an oversized image can be scaled down.');
            $image = $this->container
                ->get('image.factory')
                ->get($this->image
                ->getFileUri());
            // Verify that the image was scaled to the correct width and height.
            $this->assertLessThanOrEqual(10, $image->getWidth());
            $this->assertLessThanOrEqual(5, $image->getHeight());
            // Once again, now with negative width and height to force an error.
            copy('core/misc/druplicon.png', 'temporary://druplicon.png');
            $this->image
                ->setFileUri('temporary://druplicon.png');
            $errors = file_validate_image_resolution($this->image, '-10x-5');
            $this->assertCount(1, $errors, 'An error reported for an oversized image that can not be scaled down.');
            \Drupal::service('file_system')->unlink('temporary://druplicon.png');
        }
        else {
            // TODO: should check that the error is returned if no toolkit is available.
            $errors = file_validate_image_resolution($this->image, '5x10');
            $this->assertCount(1, $errors, 'Oversize images that cannot be scaled get an error.');
        }
    }
    
    /**
     * This will ensure the filename length is valid.
     */
    public function testFileValidateNameLength() {
        // Create a new file entity.
        $file = File::create();
        // Add a filename with an allowed length and test it.
        $file->setFilename(str_repeat('x', 240));
        $this->assertEquals(240, strlen($file->getFilename()));
        $errors = file_validate_name_length($file);
        $this->assertCount(0, $errors, 'No errors reported for 240 length filename.');
        // Add a filename with a length too long and test it.
        $file->setFilename(str_repeat('x', 241));
        $errors = file_validate_name_length($file);
        $this->assertCount(1, $errors, 'An error reported for 241 length filename.');
        // Add a filename with an empty string and test it.
        $file->setFilename('');
        $errors = file_validate_name_length($file);
        $this->assertCount(1, $errors, 'An error reported for 0 length filename.');
    }
    
    /**
     * Tests file_validate_size().
     */
    public function testFileValidateSize() {
        // Create a file with a size of 1000 bytes, and quotas of only 1 byte.
        $file = File::create([
            'filesize' => 1000,
        ]);
        $errors = file_validate_size($file, 0, 0);
        $this->assertCount(0, $errors, 'No limits means no errors.');
        $errors = file_validate_size($file, 1, 0);
        $this->assertCount(1, $errors, 'Error for the file being over the limit.');
        $errors = file_validate_size($file, 0, 1);
        $this->assertCount(1, $errors, 'Error for the user being over their limit.');
        $errors = file_validate_size($file, 1, 1);
        $this->assertCount(2, $errors, 'Errors for both the file and their limit.');
    }

}