postfix completion: inplace introduce variable: ensure doc committed when handler is started inside writeAction

test: switch on inplace mode in tests
EA-86900 - RE: PostprocessReformattingAspect.beforeDocumentChanged

java/java-impl/src/com/intellij/codeInsight/template/postfix/templates/IntroduceVariablePostfixTemplate.java

@@ -86,6 +86,11 @@ public class IntroduceVariablePostfixTemplate extends PostfixTemplateWithExpress
           }
         };
       }
+
+      @Override
+      protected boolean isInplaceAvailableInTestMode() {
+        return true;
+      }
     };
   }
 }

java/java-impl/src/com/intellij/refactoring/introduceVariable/JavaVariableInplaceIntroducer.java

@@ -422,6 +422,7 @@ public class JavaVariableInplaceIntroducer extends AbstractJavaInplaceIntroducer
     finally {
       myDeleteSelf = true;
     }
+    PsiDocumentManager.getInstance(myProject).doPostponedOperationsAndUnblockDocument(myEditor.getDocument());
     initOccurrencesMarkers();
     return variable;
   }