Add support for writing unit tests for Mojo-backed apps/extensions APIs.

extensions/renderer/resources/test_custom_bindings.js

Index: extensions/renderer/resources/test_custom_bindings.js
diff --git a/extensions/renderer/resources/test_custom_bindings.js b/extensions/renderer/resources/test_custom_bindings.js
index 5fd45495247c5def8a319ef9895dd59d07155640..43af06fc3dc89c0a15c8674c7b41f70a04ae3758 100644
--- a/extensions/renderer/resources/test_custom_bindings.js
+++ b/extensions/renderer/resources/test_custom_bindings.js
@@ -7,16 +7,8 @@
 
 var binding = require('binding').Binding.create('test');
 
-var chrome = requireNative('chrome').GetChrome();
-var GetExtensionAPIDefinitionsForTest =
-    requireNative('apiDefinitions').GetExtensionAPIDefinitionsForTest;
-var GetAvailability = requireNative('v8_context').GetAvailability;
-var GetAPIFeatures = requireNative('test_features').GetAPIFeatures;
+var delegate = require('test_delegate');

[raymes, 2014/07/24 08:17:38]

'test_environment_specific_bindings' (or anything more descriptive than
delegate)

[Sam McNally, 2014/07/24 08:44:37]

Done.

 var uncaughtExceptionHandler = require('uncaught_exception_handler');
-var userGestures = requireNative('user_gestures');
-
-var RunWithNativesEnabledModuleSystem =
-    requireNative('v8_context').RunWithNativesEnabledModuleSystem;
 
 binding.registerCustomHook(function(api) {
   var chromeTest = api.compiledApi;
@@ -36,10 +28,14 @@ binding.registerCustomHook(function(api) {
     return test ? (test.name || test.generatedName) : "(no test)";
   }
 
+  function runTests(tests) {
+    chromeTest.tests = tests;
+    testCount = chromeTest.tests.length;
+    chromeTest.runNextTest();
+  }
+
   function testDone() {
-    // Use setTimeout here to allow previous test contexts to be
-    // eligible for garbage collection.
-    setTimeout(chromeTest.runNextTest, 0);
+    delegate.testDone(chromeTest.runNextTest);
   }
 
   function allTestsDone() {
@@ -60,7 +56,7 @@ binding.registerCustomHook(function(api) {
     return function() {
       if (called != null) {
         var redundantPrefix = 'Error\n';
-        chrome.test.fail(
+        chromeTest.fail(
           'Callback has already been run. ' +
           'First call:\n' +
           $String.slice(called, redundantPrefix.length) + '\n' +
@@ -125,10 +121,6 @@ binding.registerCustomHook(function(api) {
     testDone();
   });
 
-  apiFunctions.setHandleRequest('runWithModuleSystem', function(callback) {
-    RunWithNativesEnabledModuleSystem(callback);
-  });
-
   apiFunctions.setHandleRequest('assertTrue', function(test, message) {
     chromeTest.assertBool(test, true, message);
   });
@@ -323,38 +315,12 @@ binding.registerCustomHook(function(api) {
     return chromeTest.callback(func, expectedError);
   });
 
-  apiFunctions.setHandleRequest('runTests', function(tests) {
-    chromeTest.tests = tests;
-    testCount = chromeTest.tests.length;
-    chromeTest.runNextTest();
-  });
-
-  apiFunctions.setHandleRequest('getApiDefinitions', function() {
-    return GetExtensionAPIDefinitionsForTest();
-  });
-
-  apiFunctions.setHandleRequest('getApiFeatures', function() {
-    return GetAPIFeatures();
-  });
-
-  apiFunctions.setHandleRequest('isProcessingUserGesture', function() {
-    return userGestures.IsProcessingUserGesture();
-  });
-
-  apiFunctions.setHandleRequest('runWithUserGesture', function(callback) {
-    chromeTest.assertEq(typeof(callback), 'function');
-    return userGestures.RunWithUserGesture(callback);
-  });
-
-  apiFunctions.setHandleRequest('runWithoutUserGesture', function(callback) {
-    chromeTest.assertEq(typeof(callback), 'function');
-    return userGestures.RunWithoutUserGesture(callback);
-  });
-
   apiFunctions.setHandleRequest('setExceptionHandler', function(callback) {
     chromeTest.assertEq(typeof(callback), 'function');
     uncaughtExceptionHandler.setHandler(callback);
   });
+
+  delegate.registerHooks(api, runTests, testName);
 });
 
 exports.binding = binding.generate();