fix(protocol-test): fake handler should throw error

Author: AllanZhengYP

protocol_tests/aws-ec2/tests/functional/ec2query.spec.ts

@@ -27,8 +27,10 @@ import { Readable } from "stream";
 /**
  * Throws an expected exception that contains the serialized request.
  */
-class EXPECTED_REQUEST_SERIALIZATION_ERROR {
-  constructor(readonly request: HttpRequest) {}
+class EXPECTED_REQUEST_SERIALIZATION_ERROR extends Error {
+  constructor(readonly request: HttpRequest) {
+    super();
+  }
 }
 
 /**

protocol_tests/aws-json/tests/functional/awsjson1_1.spec.ts

@@ -18,8 +18,10 @@ import { Readable } from "stream";
 /**
  * Throws an expected exception that contains the serialized request.
  */
-class EXPECTED_REQUEST_SERIALIZATION_ERROR {
-  constructor(readonly request: HttpRequest) {}
+class EXPECTED_REQUEST_SERIALIZATION_ERROR extends Error {
+  constructor(readonly request: HttpRequest) {
+    super();
+  }
 }
 
 /**

protocol_tests/aws-query/tests/functional/awsquery.spec.ts

@@ -35,8 +35,10 @@ import { Readable } from "stream";
 /**
  * Throws an expected exception that contains the serialized request.
  */
-class EXPECTED_REQUEST_SERIALIZATION_ERROR {
-  constructor(readonly request: HttpRequest) {}
+class EXPECTED_REQUEST_SERIALIZATION_ERROR extends Error {
+  constructor(readonly request: HttpRequest) {
+    super();
+  }
 }
 
 /**

protocol_tests/aws-restjson/tests/functional/restjson1.spec.ts

@@ -51,8 +51,10 @@ import { Readable } from "stream";
 /**
  * Throws an expected exception that contains the serialized request.
  */
-class EXPECTED_REQUEST_SERIALIZATION_ERROR {
-  constructor(readonly request: HttpRequest) {}
+class EXPECTED_REQUEST_SERIALIZATION_ERROR extends Error {
+  constructor(readonly request: HttpRequest) {
+    super();
+  }
 }
 
 /**

protocol_tests/aws-restxml/tests/functional/restxml.spec.ts

@@ -60,8 +60,10 @@ import { Readable } from "stream";
 /**
  * Throws an expected exception that contains the serialized request.
  */
-class EXPECTED_REQUEST_SERIALIZATION_ERROR {
-  constructor(readonly request: HttpRequest) {}
+class EXPECTED_REQUEST_SERIALIZATION_ERROR extends Error {
+  constructor(readonly request: HttpRequest) {
+    super();
+  }
 }
 
 /**