# Service components in `ngMock`

Name | Description
--- | ---
$exceptionHandler | Mock implementation of `$exceptionHandler` that rethrows or logs errors passed to it. See $exceptionHandlerProvider for configuration information.
$log | Mock implementation of `$log` that gathers all logged messages in arrays (one array per logging level). These arrays are exposed as `logs` property of each of the level-specific log function, e.g. for level `error` the array is exposed as `$log.error.logs`.
$interval | Mock implementation of the $interval service.
$httpBackend | Fake HTTP backend implementation suitable for unit testing applications that use the $http service.
$timeout | This service is just a simple decorator for $timeout service that adds a "flush" and "verifyNoPendingTasks" methods.
$controller | A decorator for `$controller` with additional `bindings` parameter, useful when testing controllers of directives that use `bindToController`.