Fixed test

Author: drpayyne

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

@@ -8,6 +8,6 @@
 <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"/>
+        <observer name="test_observer<caret>" disabled="true"/>
     </event>
 </config>

tests/com/magento/idea/magento2plugin/reference/BaseReferenceTestCase.java

@@ -39,13 +39,29 @@ protected void setUp() throws Exception {
     protected void assertHasReferenceToXmlAttributeValue(final String reference) {
         final PsiElement element = getElementFromCaret();
         for (final PsiReference psiReference: element.getReferences()) {
-            final PsiElement resolved = psiReference.resolve();
-            if (!(resolved instanceof XmlAttributeValue)) {
-                continue;
-            }
+            if (psiReference instanceof PolyVariantReferenceBase) {
+                final ResolveResult[] resolveResults
+                        = ((PolyVariantReferenceBase) psiReference).multiResolve(true);
 
-            if (((XmlAttributeValue) resolved).getValue().equals(reference)) {
-                return;
+                for (final ResolveResult resolveResult : resolveResults) {
+                    final PsiElement resolved = resolveResult.getElement();
+                    if (!(resolved instanceof XmlAttributeValue)) {
+                        continue;
+                    }
+
+                    if (((XmlAttributeValue) resolved).getValue().equals(reference)) {
+                        return;
+                    }
+                }
+            } else {
+                final PsiElement resolved = psiReference.resolve();
+                if (!(resolved instanceof XmlAttributeValue)) {
+                    continue;
+                }
+
+                if (((XmlAttributeValue) resolved).getValue().equals(reference)) {
+                    return;
+                }
             }
         }
         final String referenceNotFound =