Yahoo! UI Library

yuitest  2.5.2

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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