fix(protocol-test): compare xml payload with outmost node (#433)

Author: AllanZhengYP

smithy-typescript-codegen/src/main/java/software/amazon/smithy/typescript/codegen/integration/DocumentMemberSerVisitor.java

@@ -88,6 +88,14 @@ public DocumentMemberSerVisitor(
         this.defaultTimestampFormat = defaultTimestampFormat;
     }
 
+    /**
+     * @return the member this visitor is being run against. Used to discover member-applied
+     * traits, such as @xmlName. Can be, and defaults, to, null.
+     */
+    protected MemberShape getMemberShape() {
+        return null;
+    }
+
     /**
      * Gets the generation context.
      *

smithy-typescript-codegen/src/main/resources/software/amazon/smithy/typescript/codegen/protocol-test-xml-stub.ts

@@ -24,7 +24,7 @@ const compareEquivalentXmlBodies = (
       parsedObjToReturn[key] = parsedObjToReturn[textNodeName];
       delete parsedObjToReturn[textNodeName];
     }
-    return parsedObjToReturn;
+    return parsedObj;
   };
 
   const expectedParts = parseXmlBody(expectedBody);