MAGETWO-37213: Unable to create fixed bundle product

Author: Andrii Kasian

app/code/Magento/Bundle/Block/Adminhtml/Catalog/Product/Edit/Tab/Attributes/Extend.php

@@ -110,9 +110,11 @@ public function getOptions()
      */
     public function isDisabledField()
     {
-        return $this->getProduct()->getId() &&
-            $this->getAttribute()->getAttributeCode() === 'price' ||
-            $this->getElement()->getReadonly();
+        return $this->_getData('is_disabled_field')
+            || $this->getProduct()->getId()
+            && ($this->getAttribute()->getAttributeCode() === 'price'
+                || $this->getElement()->getReadonly()
+            );
     }
 
     /**
@@ -142,7 +144,9 @@ public function getExtendedElement($switchAttributeCode)
                 'values' => $this->getOptions(),
                 'value' => $switchAttributeCode,
                 'class' => 'required-entry next-toinput',
-                'disabled' => $this->isDisabledField()
+                'no_span' => true,
+                'disabled' => $this->isDisabledField(),
+                'value' => $this->getProduct()->getData($switchAttributeCode),
             ]
         );
     }

app/code/Magento/Bundle/Test/Unit/Block/Adminhtml/Catalog/Product/Edit/Tab/Attributes/ExtendTest.php

@@ -0,0 +1,73 @@
+<?php
+/**
+ * Copyright © 2015 Magento. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+namespace Magento\Bundle\Test\Unit\Block\Adminhtml\Catalog\Product\Edit\Tab\Attributes;
+
+use Magento\Catalog\Model\Product;
+
+class ExtendTest extends \PHPUnit_Framework_TestCase
+{
+    /** @var \Magento\Framework\Registry|\PHPUnit_Framework_MockObject_MockObject */
+    protected $registry;
+
+    /** @var \Magento\Framework\Data\FormFactory|\PHPUnit_Framework_MockObject_MockObject */
+    protected $formFactory;
+
+    /** @var \Magento\Framework\TestFramework\Unit\Helper\ObjectManager */
+    protected $objectManagerHelper;
+
+    /** @var \Magento\Bundle\Block\Adminhtml\Catalog\Product\Edit\Tab\Attributes\Extend */
+    protected $object;
+
+    public function setUp()
+    {
+        $this->registry = $this->getMockBuilder('Magento\\Framework\\Registry')->disableOriginalConstructor()->getMock(
+        );
+        $this->formFactory = $this->getMockBuilder('Magento\\Framework\\Data\\FormFactory')->disableOriginalConstructor(
+        )->getMock();
+        $this->objectManagerHelper = new \Magento\Framework\TestFramework\Unit\Helper\ObjectManager($this);
+        $this->object = $this->objectManagerHelper->getObject(
+            'Magento\\Bundle\\Block\\Adminhtml\\Catalog\\Product\\Edit\\Tab\\Attributes\\Extend',
+            ['registry' => $this->registry, 'formFactory' => $this->formFactory]
+        );
+    }
+
+    /**
+     * @return \PHPUnit_Framework_MockObject_MockObject
+     */
+    public function getProduct()
+    {
+        $product = $this->getMockBuilder(Product::class)->disableOriginalConstructor()->getMock();
+        $this->registry->expects($this->once())->method('registry')->with('product')->will(
+                $this->returnValue($product)
+            );
+        return $product;
+    }
+
+    public function testGetExtendedElement()
+    {
+        $switchAttributeCode = 'test_code';
+        $form = $this->getMockBuilder(\Magento\Framework\Data\Form::class)->disableOriginalConstructor()->getMock();
+        $and = new \PHPUnit_Framework_Constraint_And();
+        $and->setConstraints(
+            [
+                new \PHPUnit_Framework_Constraint_ArrayHasKey('value')
+            ]
+        );
+        $form->expects($this->once())->method('addField')->with(
+            $switchAttributeCode,
+            'select',
+            $and
+        );
+
+        $this->formFactory->expects($this->once())->method('create')->with()->will($this->returnValue($form));
+        $product = $this->getProduct();
+        $product->expects($this->once())->method('getData')->with($switchAttributeCode)->will(
+            $this->returnValue(123)
+        );
+        $this->object->setIsDisabledField(true);
+        $this->object->getExtendedElement($switchAttributeCode);
+    }
+}