Added test coverage for disabled observer reference navigation

Author: drpayyne

testData/project/magento2/vendor/magento/module-catalog/etc/events.xml

@@ -5,8 +5,8 @@
   * See COPYING.txt for license details.
   */
 -->
-
-<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Event/etc/events.xsd">
+<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+        xsi:noNamespaceSchemaLocation="urn:magento:framework:Event/etc/events.xsd">
     <event name="test_event_in_test_class">
         <observer name="test_observer" instance="Magento\Catalog\Observer\TestObserver" />
     </event>

testData/reference/xml/ObserverReferenceRegistrar/observerNameMustHaveReference/events.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ /**
+  * Copyright © Magento, Inc. All rights reserved.
+  * See COPYING.txt for license details.
+  */
+-->
+<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+        xsi:noNamespaceSchemaLocation="urn:magento:framework:Event/etc/events.xsd">
+    <event name="test_event_in_test_class">
+        <observer name="test_obs<caret>erver" disabled="true"/>
+    </event>
+</config>

tests/com/magento/idea/magento2plugin/reference/xml/ObserverReferenceRegistrarTest.java

@@ -18,6 +18,15 @@ public void testObserverInstanceMustHaveReference() {
         assertHasReferencePhpClass("Magento\\Catalog\\Observer\\TestObserver");
     }
 
+    /**
+     * Tests for observer name reference in events.xml.
+     */
+    public void testObserverNameMustHaveReference() {
+        myFixture.configureByFile(this.getFixturePath(ModuleEventsXml.FILE_NAME));
+
+        assertHasReferenceToXmlAttributeValue("test_observer");
+    }
+
     /**
      * Tests for event name reference in events.xml.
      */