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

extensions/test/data/test_unittest_custom_bindings.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.
 
-// test_custom_bindings.js
-// mini-framework for ExtensionApiTest browser tests
+// test_unittest_custom_bindings.js
+// An implementation of chrome.test for ApiTestBase unit tests.
+// This is a fork of src/extensions/renderer/resources/test_custom_bindings.js.

[not at google - send to devlin, 2014/07/18 15:09:14]

I'm not sure about this. It seems like you could at least pull out a small
Delegate-style interface. Forking a file seems quite heavyweight.

[Sam McNally, 2014/07/21 03:56:28]

Done.

 
 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 nativesPromise = requireAsync('testNatives');
 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;
   var apiFunctions = api.apiFunctions;
 
   chromeTest.tests = chromeTest.tests || [];
 
   var currentTest = null;
   var lastTest = null;
   var testsFailed = 0;
   var testCount = 1;
   var failureException = 'chrome.test.failure';
 
   // Helper function to get around the fact that function names in javascript
   // are read-only, and you can't assign one to anonymous functions.
   function testName(test) {
     return test ? (test.name || test.generatedName) : "(no test)";
   }
 
+  apiFunctions.setHandleRequest('notifyPass', function() {
+    nativesPromise.then(function(natives) {
+      natives.NotifyPass();
+    });
+  });
+
+  apiFunctions.setHandleRequest('notifyFail', function(message) {
+    nativesPromise.then(function(natives) {
+      natives.NotifyFail(message);
+    });
+  });
+
+  apiFunctions.setHandleRequest('log', function() {
+    nativesPromise.then(function(natives) {
+      natives.Log($Array.join(arguments, ' '));
+    });
+  });
+
   function testDone() {
-    // Use setTimeout here to allow previous test contexts to be
-    // eligible for garbage collection.
-    setTimeout(chromeTest.runNextTest, 0);
+    // Use a promise here to allow previous test contexts to be eligible for
+    // garbage collection.
+    Promise.resolve().then(function() {
+      chromeTest.runNextTest();
+    });
   }
 
   function allTestsDone() {
     if (testsFailed == 0) {
       chromeTest.notifyPass();
     } else {
       chromeTest.notifyFail('Failed ' + testsFailed + ' of ' +
                              testCount + ' tests');
     }
   }
@@ skipping 66 matching lines @@
     throw failureException;
   });
 
   apiFunctions.setHandleRequest('succeed', function() {
     console.log("[SUCCESS] " + testName(currentTest));
     chromeTest.log("(  SUCCESS )");
     testDone();
   });
 
   apiFunctions.setHandleRequest('runWithModuleSystem', function(callback) {
-    RunWithNativesEnabledModuleSystem(callback);
+    throw new Error('Not implemented');
   });
 
   apiFunctions.setHandleRequest('assertTrue', function(test, message) {
     chromeTest.assertBool(test, true, message);
   });
 
   apiFunctions.setHandleRequest('assertFalse', function(test, message) {
     chromeTest.assertBool(test, false, message);
   });
 
@@ skipping 177 matching lines @@
 
   apiFunctions.setHandleRequest('callbackPass', function(func) {
     return chromeTest.callback(func);
   });
 
   apiFunctions.setHandleRequest('callbackFail', function(expectedError, func) {
     return chromeTest.callback(func, expectedError);
   });
 
   apiFunctions.setHandleRequest('runTests', function(tests) {
-    chromeTest.tests = tests;
-    testCount = chromeTest.tests.length;
-    chromeTest.runNextTest();
+    var testWrappers = {};
+    $Array.forEach(tests, function(testCase) {
+      testWrappers[testName(testCase)] = function() {
+        chromeTest.tests = [testCase];
+        testCount = 1;
+        chromeTest.runNextTest();
+        return true;
+      }
+    });
+    return testWrappers;
   });
 
   apiFunctions.setHandleRequest('getApiDefinitions', function() {
-    return GetExtensionAPIDefinitionsForTest();
+    throw new Error('Not implemented');
   });
 
   apiFunctions.setHandleRequest('getApiFeatures', function() {
-    return GetAPIFeatures();
+    throw new Error('Not implemented');
   });
 
   apiFunctions.setHandleRequest('isProcessingUserGesture', function() {
-    return userGestures.IsProcessingUserGesture();
+    throw new Error('Not implemented');
   });
 
   apiFunctions.setHandleRequest('runWithUserGesture', function(callback) {
-    chromeTest.assertEq(typeof(callback), 'function');
-    return userGestures.RunWithUserGesture(callback);
+    throw new Error('Not implemented');
   });
 
   apiFunctions.setHandleRequest('runWithoutUserGesture', function(callback) {
-    chromeTest.assertEq(typeof(callback), 'function');
-    return userGestures.RunWithoutUserGesture(callback);
+    throw new Error('Not implemented');
   });
 
   apiFunctions.setHandleRequest('setExceptionHandler', function(callback) {
     chromeTest.assertEq(typeof(callback), 'function');
     uncaughtExceptionHandler.setHandler(callback);
   });
 });
 
 exports.binding = binding.generate();
+

[not at google - send to devlin, 2014/07/18 15:09:14]

not this

[Sam McNally, 2014/07/21 03:56:28]

Done.