public function testMerge()
 {
     $mockDef = $this->mock('tubepress_api_ioc_DefinitionInterface');
     $mockDefs = array($mockDef);
     $mockContainer = $this->mock('tubepress_api_ioc_ContainerBuilderInterface');
     $mockContainer->shouldReceive('getDefinitions')->once()->andReturn($mockDefs);
     $mockContainer->shouldReceive('addDefinitions')->once()->with($mockDefs);
     $mockExtension = $this->mock('tubepress_spi_ioc_ContainerExtensionInterface');
     $mockExtension->shouldReceive('load')->once()->with(Mockery::any('tubepress_internal_ioc_ContainerBuilder'));
     $this->_sut->registerExtension($mockExtension);
     $this->_sut->process($mockContainer);
     $this->assertTrue(true);
 }