public function testBasics()
{
$data = ['foo' => 'bar'];
$ex = new MetadataMergeException();
$this->assertInstanceOf('UnexpectedValueException', $ex);
$this->assertSame([], $ex->getContext());
$ex2 = new MetadataMergeException('Message', 42, $ex, $data);
$this->assertSame('Message', $ex2->getMessage());
$this->assertSame(42, $ex2->getCode());
$this->assertSame($ex, $ex2->getPrevious());
$this->assertSame($data, $ex2->getContext());
$ex->setContext($data);
$this->assertSame($data, $ex->getContext());
}
/**
* Merge saved session provider metadata
*
* The default implementation checks that anything in both arrays is
* identical, then returns $providedMetadata.
*
* @protected For use by \\MediaWiki\\Session\\SessionManager only
* @param array $savedMetadata Saved provider metadata
* @param array $providedMetadata Provided provider metadata
* @return array Resulting metadata
* @throws MetadataMergeException If the metadata cannot be merged
*/
public function mergeMetadata(array $savedMetadata, array $providedMetadata)
{
foreach ($providedMetadata as $k => $v) {
if (array_key_exists($k, $savedMetadata) && $savedMetadata[$k] !== $v) {
$e = new MetadataMergeException("Key \"{$k}\" changed");
$e->setContext(['old_value' => $savedMetadata[$k], 'new_value' => $v]);
throw $e;
}
}
return $providedMetadata;
}