/**
* Verify that the signature for a Sqon can be verified.
*/
public function testVerifySignatureForExistingSqon()
{
$this->sqon->commit();
self::assertTrue(Sqon::isValid($this->file), 'The signature should be valid.');
file_put_contents($this->file, 'x', FILE_APPEND);
self::assertFalse(Sqon::isValid($this->file), 'The signature should not be valid.');
}
