public function testThemeRegistration()
{
$pattern = 'some pattern';
$eventMock = $this->getMockBuilder('Magento\\Framework\\Event')->setMethods(['getPathPattern'])->disableOriginalConstructor()->getMock();
$eventMock->expects($this->any())->method('getPathPattern')->willReturn($pattern);
$observerMock = $this->getMockBuilder('Magento\\Framework\\Event\\Observer')->disableOriginalConstructor()->getMock();
$observerMock->expects($this->any())->method('getEvent')->willReturn($eventMock);
$this->registration->expects($this->once())->method('register')->with($pattern)->willThrowException(new \Magento\Framework\Exception\LocalizedException(__('exception')));
$this->logger->expects($this->once())->method('critical');
/** @var $observerMock \Magento\Framework\Event\Observer */
$this->themeObserver->themeRegistration($observerMock);
}
