Introduce InterfaceEndpointClient(IEC), InterfaceEndpointHandle and

mojo/public/js/tests/validation_unittest.js

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 define([
     "console",
     "file",
     "gin/test/expect",
     "mojo/public/interfaces/bindings/tests/validation_test_interfaces.mojom",
     "mojo/public/js/bindings",
@@ skipping 260 matching lines @@
   }
 
   function testIntegratedMessageValidation(testFilesPattern, endpoint) {
     var testFiles = getMessageTestFiles(testFilesPattern);
     expect(testFiles.length).toBeGreaterThan(0);
 
     var testMessagePipe = core.createMessagePipe();
     expect(testMessagePipe.result).toBe(core.RESULT_OK);
 
     endpoint.bind(testMessagePipe.handle1);
-    var testingController = endpoint.enableTestingMode();
-
-    var validationError;
-    testingController.setInvalidIncomingMessageHandler(function(error) {
-      validationError = error;
-    });
+    var observer = validator.ValidationErrorObserverForTesting.getInstance();
 
     for (var i = 0; i < testFiles.length; i++) {
-      validationError = noError;
+      observer.reset();

[yzshen1, 2017/03/24 21:20:13]

nit: you could move this line to the end of the for-loop.

[wangjimmy, 2017/03/27 16:51:28]

Done.

       var testMessage = readTestMessage(testFiles[i]);
       var handles = new Array(testMessage.handleCount);
 
       var writeMessageValue = core.writeMessage(
           testMessagePipe.handle0,
           new Uint8Array(testMessage.buffer.arrayBuffer),
           new Array(testMessage.handleCount),
           core.WRITE_MESSAGE_FLAG_NONE);
       expect(writeMessageValue).toBe(core.RESULT_OK);
 
-      testingController.waitForNextMessage();
-      checkValidationResult(testFiles[i], validationError);
+      endpoint.waitForNextMessageForTesting();
+      checkValidationResult(testFiles[i], observer.lastError);
     }
 
     expect(core.close(testMessagePipe.handle0)).toBe(core.RESULT_OK);
   }
 
   function testIntegratedMessageHeaderValidation() {
     testIntegratedMessageValidation(
         "integration_msghdr",
         new bindings.Binding(testInterface.IntegrationTestInterface, {}));
     testIntegratedMessageValidation(
@@ skipping 14 matching lines @@
   }
 
   expect(checkTestMessageParser()).toBeNull();
   testConformanceMessageValidation();
   testBoundsCheckMessageValidation();
   testResponseConformanceMessageValidation();
   testResponseBoundsCheckMessageValidation();
   testIntegratedMessageHeaderValidation();
   testIntegratedResponseMessageValidation();
   testIntegratedRequestMessageValidation();
+  validator.clearTestingMode();
 
   this.result = "PASS";
 });