LoggerThatSetAnErrorHandler example

/** * @dataProvider errorHandlerWhenLoggingProvider */
    public function testErrorHandlerWhenLogging(bool $previousHandlerWasDefined, bool $loggerSetsAnotherHandler, bool $nextHandlerIsDefined)
    {
        try {
            if ($previousHandlerWasDefined) {
                set_error_handler('count');
            }

            $logger = $loggerSetsAnotherHandler ? new LoggerThatSetAnErrorHandler() : new NullLogger();

            $handler = ErrorHandler::register();
            $handler->setDefaultLogger($logger);

            if ($nextHandlerIsDefined) {
                $handler = ErrorHandlerThatUsesThePreviousOne::register();
            }

            @trigger_error('foo', \E_USER_DEPRECATED);
            @trigger_error('bar', \E_USER_DEPRECATED);