MAGETWO-99500: Configurable options attribute position is not saved correctly via API

Author: Roman Lytvynenko

app/code/Magento/ConfigurableProduct/Test/Unit/Model/LinkManagementTest.php

@@ -149,7 +149,6 @@ public function testAddChild()
             ->disableOriginalConstructor()
             ->setMethods(['getId', 'getData'])
             ->getMock();
-
         $extensionAttributesMock = $this->getMockBuilder(\Magento\Catalog\Api\Data\ProductExtension::class)
             ->disableOriginalConstructor()
             ->setMethods(
@@ -193,7 +192,6 @@ public function testAddChild()
             ->disableOriginalConstructor()
             ->setMethods(['getValue', 'getLabel'])
             ->getMock();
-
         $attributeCollectionMock = $this->getMockBuilder(
             \Magento\ConfigurableProduct\Model\ResourceModel\Product\Type\Configurable\Attribute\Collection::class
         )
@@ -227,15 +225,11 @@ public function testAddChild()
         $attributeMock->expects($this->any())->method('getCollection')->willReturn($attributeCollectionMock);
         $attributeCollectionMock->expects($this->any())->method('addFieldToFilter')->willReturnSelf();
         $attributeCollectionMock->expects($this->any())->method('getItems')->willReturn([$attributeMock]);
-
         $attributeMock->expects($this->any())->method('getId')->willReturn(1);
         $attributeMock->expects($this->any())->method('getOptions')->willReturn([$attributeOptionMock]);
-
         $extensionAttributesMock->expects($this->any())->method('setConfigurableProductOptions');
         $extensionAttributesMock->expects($this->any())->method('setConfigurableProductLinks');
-
         $this->productRepository->expects($this->once())->method('save');
-
         $this->assertTrue(true, $this->object->addChild($productSku, $childSku));
     }