# Yahoo! UI Library

### yuitest 2.5.1

Yahoo! UI Library > yuitest > TestRunner.js (source view)

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    YAHOO.namespace("tool");

    /**
     * The YUI test tool
     * @module yuitest
     * @namespace YAHOO.tool
     * @requires yahoo,dom,event,logger
     */

    //-----------------------------------------------------------------------------
    // TestRunner object
    //-----------------------------------------------------------------------------

    /**
     * Runs test suites and test cases, providing events to allowing for the
     * interpretation of test results.
     * @namespace YAHOO.tool
     * @class TestRunner
     * @static
     */
    YAHOO.tool.TestRunner = (function(){

        /**
         * A node in the test tree structure. May represent a TestSuite, TestCase, or
         * test function.
         * @param {Variant} testObject A TestSuite, TestCase, or the name of a test function.
         * @class TestNode
         * @constructor
         * @private
         */
        function TestNode(testObject /*:Variant*/){

            /**
             * The TestSuite, TestCase, or test function represented by this node.
             * @type Variant
             * @property testObject
             */
            this.testObject = testObject;

            /**
             * Pointer to this node's first child.
             * @type TestNode
             * @property firstChild
             */
            this.firstChild /*:TestNode*/ = null;

            /**
             * Pointer to this node's last child.
             * @type TestNode
             * @property lastChild
             */
            this.lastChild = null;

            /**
             * Pointer to this node's parent.
             * @type TestNode
             * @property parent
             */
            this.parent = null;

            /**
             * Pointer to this node's next sibling.
             * @type TestNode
             * @property next
             */
            this.next = null;

            /**
             * Test results for this test object.
             * @type object
             * @property results
             */
            this.results /*:Object*/ = {
                passed : 0,
                failed : 0,
                total : 0,
                ignored : 0
            };

            //initialize results
            if (testObject instanceof YAHOO.tool.TestSuite){
                this.results.type = "testsuite";
                this.results.name = testObject.name;
            } else if (testObject instanceof YAHOO.tool.TestCase){
                this.results.type = "testcase";
                this.results.name = testObject.name;
            }

        }

        TestNode.prototype = {

            /**
             * Appends a new test object (TestSuite, TestCase, or test function name) as a child
             * of this node.
             * @param {Variant} testObject A TestSuite, TestCase, or the name of a test function.
             * @return {Void}
             */
            appendChild : function (testObject /*:Variant*/) /*:Void*/{
                var node = new TestNode(testObject);
                if (this.firstChild === null){
                    this.firstChild = this.lastChild = node;
                } else {
                    this.lastChild.next = node;
                    this.lastChild = node;
                }
                node.parent = this;
                return node;
            }
        };

        function TestRunner(){

            //inherit from EventProvider
            TestRunner.superclass.constructor.apply(this,arguments);

            /**
             * Suite on which to attach all TestSuites and TestCases to be run.
             * @type YAHOO.tool.TestSuite
             * @property masterSuite
             * @private
             */
            this.masterSuite /*:YAHOO.tool.TestSuite*/ = new YAHOO.tool.TestSuite("YUI Test Results");

            /**
             * Pointer to the current node in the test tree.
             * @type TestNode
             * @private
             * @property _cur
             */
            this._cur = null;

            /**
             * Pointer to the root node in the test tree.
             * @type TestNode
             * @private
             * @property _root
             */
            this._root = null;

            //create events
            var events /*:Array*/ = [
                this.TEST_CASE_BEGIN_EVENT,
                this.TEST_CASE_COMPLETE_EVENT,
                this.TEST_SUITE_BEGIN_EVENT,
                this.TEST_SUITE_COMPLETE_EVENT,
                this.TEST_PASS_EVENT,
                this.TEST_FAIL_EVENT,
                this.TEST_IGNORE_EVENT,
                this.COMPLETE_EVENT,
                this.BEGIN_EVENT
            ];
            for (var i=0; i < events.length; i++){
                this.createEvent(events[i], { scope: this });
            }

        }

        YAHOO.lang.extend(TestRunner, YAHOO.util.EventProvider, {

            //-------------------------------------------------------------------------
            // Constants
            //-------------------------------------------------------------------------

            /**
             * Fires when a test case is opened but before the first
             * test is executed.
             * @event testcasebegin
             */
            TEST_CASE_BEGIN_EVENT /*:String*/ : "testcasebegin",

            /**
             * Fires when all tests in a test case have been executed.
             * @event testcasecomplete
             */
            TEST_CASE_COMPLETE_EVENT /*:String*/ : "testcasecomplete",

            /**
             * Fires when a test suite is opened but before the first
             * test is executed.
             * @event testsuitebegin
             */
            TEST_SUITE_BEGIN_EVENT /*:String*/ : "testsuitebegin",

            /**
             * Fires when all test cases in a test suite have been
             * completed.
             * @event testsuitecomplete
             */
            TEST_SUITE_COMPLETE_EVENT /*:String*/ : "testsuitecomplete",

            /**
             * Fires when a test has passed.
             * @event pass
             */
            TEST_PASS_EVENT /*:String*/ : "pass",

            /**
             * Fires when a test has failed.
             * @event fail
             */
            TEST_FAIL_EVENT /*:String*/ : "fail",

            /**
             * Fires when a test has been ignored.
             * @event ignore
             */
            TEST_IGNORE_EVENT /*:String*/ : "ignore",

            /**
             * Fires when all test suites and test cases have been completed.
             * @event complete
             */
            COMPLETE_EVENT /*:String*/ : "complete",

            /**
             * Fires when the run() method is called.
             * @event begin
             */
            BEGIN_EVENT /*:String*/ : "begin",

            //-------------------------------------------------------------------------
            // Test Tree-Related Methods
            //-------------------------------------------------------------------------

            /**
             * Adds a test case to the test tree as a child of the specified node.
             * @param {TestNode} parentNode The node to add the test case to as a child.
             * @param {YAHOO.tool.TestCase} testCase The test case to add.
             * @return {Void}
             * @static
             * @private
             * @method _addTestCaseToTestTree
             */
           _addTestCaseToTestTree : function (parentNode /*:TestNode*/, testCase /*:YAHOO.tool.TestCase*/) /*:Void*/{

                //add the test suite
                var node = parentNode.appendChild(testCase);

                //iterate over the items in the test case
                for (var prop in testCase){
                    if (prop.indexOf("test") === 0 && YAHOO.lang.isFunction(testCase[prop])){
                        node.appendChild(prop);
                    }
                }

            },

            /**
             * Adds a test suite to the test tree as a child of the specified node.
             * @param {TestNode} parentNode The node to add the test suite to as a child.
             * @param {YAHOO.tool.TestSuite} testSuite The test suite to add.
             * @return {Void}
             * @static
             * @private
             * @method _addTestSuiteToTestTree
             */
            _addTestSuiteToTestTree : function (parentNode /*:TestNode*/, testSuite /*:YAHOO.tool.TestSuite*/) /*:Void*/ {

                //add the test suite
                var node = parentNode.appendChild(testSuite);

                //iterate over the items in the master suite
                for (var i=0; i < testSuite.items.length; i++){
                    if (testSuite.items[i] instanceof YAHOO.tool.TestSuite) {
                        this._addTestSuiteToTestTree(node, testSuite.items[i]);
                    } else if (testSuite.items[i] instanceof YAHOO.tool.TestCase) {
                        this._addTestCaseToTestTree(node, testSuite.items[i]);
                    }
                }
            },

            /**
             * Builds the test tree based on items in the master suite. The tree is a hierarchical
             * representation of the test suites, test cases, and test functions. The resulting tree
             * is stored in _root and the pointer _cur is set to the root initially.
             * @return {Void}
             * @static
             * @private
             * @method _buildTestTree
             */
            _buildTestTree : function () /*:Void*/ {

                this._root = new TestNode(this.masterSuite);
                this._cur = this._root;

                //iterate over the items in the master suite
                for (var i=0; i < this.masterSuite.items.length; i++){
                    if (this.masterSuite.items[i] instanceof YAHOO.tool.TestSuite) {
                        this._addTestSuiteToTestTree(this._root, this.masterSuite.items[i]);
                    } else if (this.masterSuite.items[i] instanceof YAHOO.tool.TestCase) {
                        this._addTestCaseToTestTree(this._root, this.masterSuite.items[i]);
                    }
                }

            },

            //-------------------------------------------------------------------------
            // Private Methods
            //-------------------------------------------------------------------------

            /**
             * Handles the completion of a test object's tests. Tallies test results
             * from one level up to the next.
             * @param {TestNode} node The TestNode representing the test object.
             * @return {Void}
             * @method _handleTestObjectComplete
             * @private
             */
            _handleTestObjectComplete : function (node /*:TestNode*/) /*:Void*/ {
                if (YAHOO.lang.isObject(node.testObject)){
                    node.parent.results.passed += node.results.passed;
                    node.parent.results.failed += node.results.failed;
                    node.parent.results.total += node.results.total;
                    node.parent.results.ignored += node.results.ignored;
                    node.parent.results[node.testObject.name] = node.results;

                    if (node.testObject instanceof YAHOO.tool.TestSuite){
                        node.testObject.tearDown();
                        this.fireEvent(this.TEST_SUITE_COMPLETE_EVENT, { testSuite: node.testObject, results: node.results});
                    } else if (node.testObject instanceof YAHOO.tool.TestCase){
                        this.fireEvent(this.TEST_CASE_COMPLETE_EVENT, { testCase: node.testObject, results: node.results});
                    }
                }
            },

            //-------------------------------------------------------------------------
            // Navigation Methods
            //-------------------------------------------------------------------------

            /**
             * Retrieves the next node in the test tree.
             * @return {TestNode} The next node in the test tree or null if the end is reached.
             * @private
             * @static
             * @method _next
             */
            _next : function () /*:TestNode*/ {

                if (this._cur.firstChild) {
                    this._cur = this._cur.firstChild;
                } else if (this._cur.next) {
                    this._cur = this._cur.next;
                } else {
                    while (this._cur && !this._cur.next && this._cur !== this._root){
                        this._handleTestObjectComplete(this._cur);
                        this._cur = this._cur.parent;
                    }

                    if (this._cur == this._root){
                        this._cur.results.type = "report";
                        this._cur.results.timestamp = (new Date()).toLocaleString();
                        this.fireEvent(this.COMPLETE_EVENT, { results: this._cur.results});
                        this.results = this._cur.results;
                        this._cur = null;
                    } else {
                        this._handleTestObjectComplete(this._cur);
                        this._cur = this._cur.next;
                    }
                }

                return this._cur;
            },

            /**
             * Runs a test case or test suite, returning the results.
             * @param {YAHOO.tool.TestCase|YAHOO.tool.TestSuite} testObject The test case or test suite to run.
             * @return {Object} Results of the execution with properties passed, failed, and total.
             * @private
             * @method _run
             * @static
             */
            _run : function () /*:Void*/ {

                //flag to indicate if the TestRunner should wait before continuing
                var shouldWait /*:Boolean*/ = false;

                //get the next test node
                var node = this._next();

                if (node !== null) {
                    var testObject = node.testObject;

                    //figure out what to do
                    if (YAHOO.lang.isObject(testObject)){
                        if (testObject instanceof YAHOO.tool.TestSuite){
                            this.fireEvent(this.TEST_SUITE_BEGIN_EVENT, { testSuite: testObject });
                            testObject.setUp();
                        } else if (testObject instanceof YAHOO.tool.TestCase){
                            this.fireEvent(this.TEST_CASE_BEGIN_EVENT, { testCase: testObject });
                        }

                        //some environments don't support setTimeout
                        if (typeof setTimeout != "undefined"){
                            setTimeout(function(){
                                YAHOO.tool.TestRunner._run();
                            }, 0);
                        } else {
                            this._run();
                        }
                    } else {
                        this._runTest(node);
                    }

                }
            },

            _resumeTest : function (segment /*:Function*/) /*:Void*/ {

                //get relevant information
                var node /*:TestNode*/ = this._cur;
                var testName /*:String*/ = node.testObject;
                var testCase /*:YAHOO.tool.TestCase*/ = node.parent.testObject;

                //get the "should" test cases
                var shouldFail /*:Object*/ = (testCase._should.fail || {})[testName];
                var shouldError /*:Object*/ = (testCase._should.error || {})[testName];

                //variable to hold whether or not the test failed
                var failed /*:Boolean*/ = false;
                var error /*:Error*/ = null;

                //try the test
                try {

                    //run the test
                    segment.apply(testCase);

                    //if it should fail, and it got here, then it's a fail because it didn't
                    if (shouldFail){
                        error = new YAHOO.util.ShouldFail();
                        failed = true;
                    } else if (shouldError){
                        error = new YAHOO.util.ShouldError();
                        failed = true;
                    }

                } catch (thrown /*:Error*/){
                    if (thrown instanceof YAHOO.util.AssertionError) {
                        if (!shouldFail){
                            error = thrown;
                            failed = true;
                        }
                    } else if (thrown instanceof YAHOO.tool.TestCase.Wait){

                        if (YAHOO.lang.isFunction(thrown.segment)){
                            if (YAHOO.lang.isNumber(thrown.delay)){

                                //some environments don't support setTimeout
                                if (typeof setTimeout != "undefined"){
                                    setTimeout(function(){
                                        YAHOO.tool.TestRunner._resumeTest(thrown.segment);
                                    }, thrown.delay);
                                } else {
                                    throw new Error("Asynchronous tests not supported in this environment.");
                                }
                            }
                        }

                        return;

                    } else {
                        //first check to see if it should error
                        if (!shouldError) {
                            error = new YAHOO.util.UnexpectedError(thrown);
                            failed = true;
                        } else {
                            //check to see what type of data we have
                            if (YAHOO.lang.isString(shouldError)){

                                //if it's a string, check the error message
                                if (thrown.message != shouldError){
                                    error = new YAHOO.util.UnexpectedError(thrown);
                                    failed = true;
                                }
                            } else if (YAHOO.lang.isFunction(shouldError)){

                                //if it's a function, see if the error is an instance of it
                                if (!(thrown instanceof shouldError)){
                                    error = new YAHOO.util.UnexpectedError(thrown);
                                    failed = true;
                                }

                            } else if (YAHOO.lang.isObject(shouldError)){

                                //if it's an object, check the instance and message
                                if (!(thrown instanceof shouldError.constructor) ||
                                        thrown.message != shouldError.message){
                                    error = new YAHOO.util.UnexpectedError(thrown);
                                    failed = true;
                                }

                            }

                        }
                    }

                }

                //fireEvent appropriate event
                if (failed) {
                    this.fireEvent(this.TEST_FAIL_EVENT, { testCase: testCase, testName: testName, error: error });
                } else {
                    this.fireEvent(this.TEST_PASS_EVENT, { testCase: testCase, testName: testName });
                }

                //run the tear down
                testCase.tearDown();

                //update results
                node.parent.results[testName] = {
                    result: failed ? "fail" : "pass",
                    message: error ? error.getMessage() : "Test passed",
                    type: "test",
                    name: testName
                };

                if (failed){
                    node.parent.results.failed++;
                } else {
                    node.parent.results.passed++;
                }
                node.parent.results.total++;

                //set timeout not supported in all environments
                if (typeof setTimeout != "undefined"){
                    setTimeout(function(){
                        YAHOO.tool.TestRunner._run();
                    }, 0);
                } else {
                    this._run();
                }

            },

            /**
             * Runs a single test based on the data provided in the node.
             * @param {TestNode} node The TestNode representing the test to run.
             * @return {Void}
             * @static
             * @private
             * @name _runTest
             */
            _runTest : function (node /*:TestNode*/) /*:Void*/ {

                //get relevant information
                var testName /*:String*/ = node.testObject;
                var testCase /*:YAHOO.tool.TestCase*/ = node.parent.testObject;
                var test /*:Function*/ = testCase[testName];

                //get the "should" test cases
                var shouldIgnore /*:Object*/ = (testCase._should.ignore || {})[testName];

                //figure out if the test should be ignored or not
                if (shouldIgnore){

                    //update results
                    node.parent.results[testName] = {
                        result: "ignore",
                        message: "Test ignored",
                        type: "test",
                        name: testName
                    };

                    node.parent.results.ignored++;
                    node.parent.results.total++;

                    this.fireEvent(this.TEST_IGNORE_EVENT, { testCase: testCase, testName: testName });

                    //some environments don't support setTimeout
                    if (typeof setTimeout != "undefined"){
                        setTimeout(function(){
                            YAHOO.tool.TestRunner._run();
                        }, 0);
                    } else {
                        this._run();
                    }

                } else {

                    //run the setup
                    testCase.setUp();

                    //now call the body of the test
                    this._resumeTest(test);
                }

            },

            //-------------------------------------------------------------------------
            // Protected Methods
            //-------------------------------------------------------------------------

            /*
             * Fires events for the TestRunner. This overrides the default fireEvent()
             * method from EventProvider to add the type property to the data that is
             * passed through on each event call.
             * @param {String} type The type of event to fire.
             * @param {Object} data (Optional) Data for the event.
             * @method fireEvent
             * @static
             * @protected
             */
            fireEvent : function (type /*:String*/, data /*:Object*/) /*:Void*/ {
                data = data || {};
                data.type = type;
                TestRunner.superclass.fireEvent.call(this, type, data);
            },

            //-------------------------------------------------------------------------
            // Public Methods
            //-------------------------------------------------------------------------

            /**
             * Adds a test suite or test case to the list of test objects to run.
             * @param testObject Either a TestCase or a TestSuite that should be run.
             * @return {Void}
             * @method add
             * @static
             */
            add : function (testObject /*:Object*/) /*:Void*/ {
                this.masterSuite.add(testObject);
            },

            /**
             * Removes all test objects from the runner.
             * @return {Void}
             * @method clear
             * @static
             */
            clear : function () /*:Void*/ {
                this.masterSuite.items = [];
            },

            /**
             * Resumes the TestRunner after wait() was called.
             * @param {Function} segment The function to run as the rest
             *      of the haulted test.
             * @return {Void}
             * @method resume
             * @static
             */
            resume : function (segment /*:Function*/) /*:Void*/ {
                this._resumeTest(segment || function(){});
            },

            /**
             * Runs the test suite.
             * @return {Void}
             * @method run
             * @static
             */
            run : function (testObject /*:Object*/) /*:Void*/ {

                //pointer to runner to avoid scope issues
                var runner = YAHOO.tool.TestRunner;

                //build the test tree
                runner._buildTestTree();

                //fire the begin event
                runner.fireEvent(runner.BEGIN_EVENT);

                //begin the testing
                runner._run();
            }
        });

        return new TestRunner();

    })();

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