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<?php
/**
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*/
use JsonSchema\Constraints\Constraint;
use JsonSchema\Constraints\Factory;
use JsonSchema\Validator;
/**
* Trait for validating data structures against JSON schemas.
*
* Based on the jsonrainbow/json-schema package, supports Draft-3 and Draft-4
* schemas.
*
* @stable to use in extensions
* @since 1.43
*/
trait JsonSchemaAssertionTrait {
/**
* Load data from a JSON file.
*
* @param string $jsonFile The path of the JSON file
*
* @return mixed
*/
private static function loadJsonData( string $jsonFile ) {
$json = file_get_contents( $jsonFile );
if ( $json === false ) {
throw new InvalidArgumentException( "Unable to load content of $jsonFile" );
}
return json_decode( $json, false, JSON_THROW_ON_ERROR );
}
/**
* @param string|array $schema A JSON schema as an array structure, or the
* file path of a JSON schema file.
* @param string|array|stdClass $json A JSONic data structure, or a JSON string.
* @param array<string, string> $resources Mapping of schema IDs to local files,
* to avoid loading schemas over the network during testing.
*/
private function assertMatchesJsonSchema( $schema, $json, array $resources = [] ): void {
if ( is_string( $json ) ) {
try {
$json = json_decode( $json, false, JSON_THROW_ON_ERROR );
} catch ( JsonException $ex ) {
self::fail( 'Invalid JSON: ' . $ex->getMessage() );
}
}
if ( is_string( $schema ) ) {
// Let the JsonException propagate, this indicates a bug in the test,
// not a test failure.
$schema = self::loadJsonData( $schema );
}
$factory = new Factory();
foreach ( $resources as $id => $rc ) {
$factory->getSchemaStorage()->addSchema(
rtrim( $id, '#' ),
self::loadJsonData( $rc )
);
}
$validator = new Validator( $factory );
$validator->validate(
$json, $schema,
Constraint::CHECK_MODE_TYPE_CAST
);
if ( !$validator->isValid() ) {
foreach ( $validator->getErrors() as $error ) {
$error = json_encode( $error );
self::fail( "JSON schema validation failed: $error" );
}
}
$this->addToAssertionCount( 1 );
}
/**
* Validate a JSON schema.
*
* Currently only works for schemas that match Draft-4.
*
* @param array $schema The schema to validate.
* @throws LogicException if the schema is invalid
*/
public function assertValidJsonSchema( array $schema ): void {
// Load the draft-04 schema from the local file
$metaSchema = MW_INSTALL_PATH . '/vendor/justinrainbow/json-schema/dist/' .
'schema/json-schema-draft-04.json';
self::assertMatchesJsonSchema( $metaSchema, $schema );
}
}