orderItemMock = $this->getMockBuilder(\Magento\Sales\Model\Order\Item::class) ->disableOriginalConstructor() ->getMock(); $this->item = new \Magento\Sales\Model\Order\Admin\Item(); } public function testGetSku() { $sku = 'sku'; $this->orderItemMock->expects($this->once()) ->method('getSku') ->willReturn($sku); $result = $this->item->getSku($this->orderItemMock); $this->assertEquals($sku, $result); } public function testGetName() { $name = 'name'; $this->orderItemMock->expects($this->once()) ->method('getName') ->willReturn($name); $result = $this->item->getName($this->orderItemMock); $this->assertEquals($name, $result); } public function testGetProductId() { $productId = 1; $this->orderItemMock->expects($this->once()) ->method('getProductId') ->willReturn($productId); $result = $this->item->getProductId($this->orderItemMock); $this->assertEquals($productId, $result); } }