JavaScript unit test framework for Chrome remote desktop - Part II

third_party/qunit/src/browser_test_harness.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.
+
+/**
+ * @fileoverview
+ * Integration module for QUnit tests running in browser tests.
+ * Specifically it:
+ * - Sets QUnit.autostart to false, so that the browser test can hook the test
+ *   results callback before the test starts.
+ * - Implements a text-based test reporter to report test results back to the
+ *   browser test.
+ */
+
+(function(QUnit, automationController, exports) {
+
+'use strict';
+
+var TestReporter = function() {
+  this.errorMessage_ = '';
+  this.failedTestsCount_ = 0;
+  this.failedAssertions_ = [];
+};
+
+TestReporter.prototype.init = function(qunit) {
+  qunit.testDone(this.onTestDone_.bind(this));
+  qunit.log(this.onAssertion_.bind(this));
+};
+
+TestReporter.prototype.onTestDone_ = function(details) {
+  if (this.failedAssertions_.length > 0) {
+    this.errorMessage_ += '  ' + details.module + '.' + details.name + '\n';
+    this.errorMessage_ += this.failedAssertions_.map(
+        function(assertion, index){
+          return '    ' + (index + 1) + '. ' + assertion.message + '\n' +
+                 '    ' + assertion.source;
+        }).join('\n');
+    this.failedAssertions_ = [];
+    this.failedTestsCount_++;
+  }
+};
+
+TestReporter.prototype.onAssertion_ = function(details) {
+  if (!details.result) {
+    this.failedAssertions_.push(details);
+  }
+};
+
+TestReporter.prototype.getErrorMessage = function(){
+  var errorMessage = '';
+  if (this.failedTestsCount_ > 0) {
+    var test = (this.failedTestsCount_ > 1) ? 'tests' : 'test';
+    errorMessage = this.failedTestsCount_  + ' ' + test + ' failed:\n';
+    errorMessage += this.errorMessage_;
+  }
+  return errorMessage;
+};
+
+var BrowserTestHarness = function(qunit, domAutomationController, reporter) {
+  this.qunit_ = qunit;
+  this.automationController_ = domAutomationController;
+  this.reporter_ = reporter;
+};
+
+BrowserTestHarness.prototype.init = function() {
+  this.qunit_.config.autostart = false;
+};
+
+BrowserTestHarness.prototype.run = function() {
+  this.reporter_.init(this.qunit_);
+  this.qunit_.start();
+  this.qunit_.done(function(details){
+    this.automationController_.send(JSON.stringify({
+      passed: details.passed == details.total,
+      errorMessage: this.reporter_.getErrorMessage()
+    }));
+  }.bind(this));
+};
+
+// The browser test runs chrome with the flag --dom-automation, which creates
+// the window.domAutomationController object.  This allows the test suite to
+// JS-encoded data back to the browser test.
+if (automationController) {
+  if (!QUnit) {
+    console.error('browser_test_harness.js must be included after QUnit.js.');
+    return;
+  }
+
+  var testHarness = new BrowserTestHarness(
+      QUnit,
+      automationController,
+      new TestReporter());
+  testHarness.init();
+  exports.browserTestHarness = testHarness;
+}
+
+})(window.QUnit, window.domAutomationController, window);