/**
* @test
* @return void
*/
public function testAfterDelete()
{
$expectId = 101;
$theme = $this->getMockBuilder('Magento\\Framework\\View\\Design\\ThemeInterface')->setMethods(['delete', 'getId'])->getMockForAbstractClass();
$theme->expects($this->once())->method('getId')->willReturn($expectId);
$theme->expects($this->once())->method('delete')->willReturnSelf();
$this->_model->setId(1);
$this->resourceCollection->expects($this->at(0))->method('addFieldToFilter')->with('parent_id', 1)->willReturnSelf();
$this->resourceCollection->expects($this->at(1))->method('addFieldToFilter')->with('type', Theme::TYPE_STAGING)->willReturnSelf();
$this->resourceCollection->expects($this->once())->method('getFirstItem')->willReturn($theme);
$this->resourceCollection->expects($this->once())->method('updateChildRelations')->with($this->_model);
$this->assertInstanceOf(get_class($this->_model), $this->_model->afterDelete());
}