getMockBuilder(\Magento\Framework\DB\Select\RendererInterface::class) ->disableOriginalConstructor() ->getMock(); $renders = [ ['renderer' => $rendererOne, 'sort' => 10, 'part' => 'from'], ['renderer' => $rendererOne, 'sort' => 20, 'part' => 'from'], ['renderer' => $rendererOne, 'sort' => 5, 'part' => 'from'], ]; $selectMock = $this->getMockBuilder(\Magento\Framework\DB\Select::class) ->disableOriginalConstructor() ->getMock(); $rendererOne->expects($this->any()) ->method('render') ->withAnyParameters() ->willReturn('render1'); $model = new \Magento\Framework\DB\Select\SelectRenderer($renders); $this->assertEquals('render1', $model->render($selectMock)); } }