Remove unreachable code after an exception

[mediawiki.git] / tests / qunit / data / testrunner.js

/*global CompletenessTest, sinon */
( function ( $, mw, QUnit ) {
        'use strict';

        var mwTestIgnore, mwTester, addons;

        /**
         * Add bogus to url to prevent IE crazy caching
         *
         * @param {string} value a relative path (eg. 'data/foo.js'
         * or 'data/test.php?foo=bar').
         * @return {string} Such as 'data/foo.js?131031765087663960'
         */
        QUnit.fixurl = function ( value ) {
                return value + ( /\?/.test( value ) ? '&' : '?' )
                        + String( new Date().getTime() )
                        + String( parseInt( Math.random() * 100000, 10 ) );
        };

        /**
         * Configuration
         */

        // For each test() that is asynchronous, allow this time to pass before
        // killing the test and assuming timeout failure.
        QUnit.config.testTimeout = 60 * 1000;

        // Add a checkbox to QUnit header to toggle MediaWiki ResourceLoader debug mode.
        QUnit.config.urlConfig.push( {
                id: 'debug',
                label: 'Enable ResourceLoaderDebug',
                tooltip: 'Enable debug mode in ResourceLoader',
                value: 'true'
        } );

        /**
         * CompletenessTest
         *
         * Adds toggle checkbox to header
         */
        QUnit.config.urlConfig.push( {
                id: 'completenesstest',
                label: 'Run CompletenessTest',
                tooltip: 'Run the completeness test'
        } );

        /**
         * SinonJS
         *
         * Glue code for nicer integration with QUnit setup/teardown
         * Inspired by http://sinonjs.org/releases/sinon-qunit-1.0.0.js
         * Fixes:
         * - Work properly with asynchronous QUnit by using module setup/teardown
         *   instead of synchronously wrapping QUnit.test.
         */
        sinon.assert.fail = function ( msg ) {
                QUnit.assert.ok( false, msg );
        };
        sinon.assert.pass = function ( msg ) {
                QUnit.assert.ok( true, msg );
        };
        sinon.config = {
                injectIntoThis: true,
                injectInto: null,
                properties: [ 'spy', 'stub', 'mock', 'sandbox' ],
                // Don't fake timers by default
                useFakeTimers: false,
                useFakeServer: false
        };
        ( function () {
                var orgModule = QUnit.module;

                QUnit.module = function ( name, localEnv ) {
                        localEnv = localEnv || {};
                        orgModule( name, {
                                setup: function () {
                                        var config = sinon.getConfig( sinon.config );
                                        config.injectInto = this;
                                        sinon.sandbox.create( config );

                                        if ( localEnv.setup ) {
                                                localEnv.setup.call( this );
                                        }
                                },
                                teardown: function () {
                                        if ( localEnv.teardown ) {
                                                localEnv.teardown.call( this );
                                        }

                                        this.sandbox.verifyAndRestore();
                                }
                        } );
                };
        }() );

        // Extend QUnit.module to provide a fixture element.
        ( function () {
                var orgModule = QUnit.module;

                QUnit.module = function ( name, localEnv ) {
                        var fixture;
                        localEnv = localEnv || {};
                        orgModule( name, {
                                setup: function () {
                                        fixture = document.createElement( 'div' );
                                        fixture.id = 'qunit-fixture';
                                        document.body.appendChild( fixture );

                                        if ( localEnv.setup ) {
                                                localEnv.setup.call( this );
                                        }
                                },
                                teardown: function () {
                                        if ( localEnv.teardown ) {
                                                localEnv.teardown.call( this );
                                        }

                                        fixture.parentNode.removeChild( fixture );
                                }
                        } );
                };
        }() );

        // Initiate when enabled
        if ( QUnit.urlParams.completenesstest ) {

                // Return true to ignore
                mwTestIgnore = function ( val, tester ) {

                        // Don't record methods of the properties of constructors,
                        // to avoid getting into a loop (prototype.constructor.prototype..).
                        // Since we're therefor skipping any injection for
                        // "new mw.Foo()", manually set it to true here.
                        if ( val instanceof mw.Map ) {
                                tester.methodCallTracker.Map = true;
                                return true;
                        }
                        if ( val instanceof mw.Title ) {
                                tester.methodCallTracker.Title = true;
                                return true;
                        }

                        // Don't record methods of the properties of a jQuery object
                        if ( val instanceof $ ) {
                                return true;
                        }

                        // Don't iterate over the module registry (the 'script' references would
                        // be listed as untested methods otherwise)
                        if ( val === mw.loader.moduleRegistry ) {
                                return true;
                        }

                        return false;
                };

                mwTester = new CompletenessTest( mw, mwTestIgnore );
        }

        /**
         * Reset mw.config and others to a fresh copy of the live config for each test(),
         * and restore it back to the live one afterwards.
         *
         * @param {Object} [localEnv]
         * @example (see test suite at the bottom of this file)
         * </code>
         */
        QUnit.newMwEnvironment = ( function () {
                var warn, error, liveConfig, liveMessages,
                        ajaxRequests = [];

                liveConfig = mw.config.values;
                liveMessages = mw.messages.values;

                function suppressWarnings() {
                        warn = mw.log.warn;
                        error = mw.log.error;
                        mw.log.warn = mw.log.error = $.noop;
                }

                function restoreWarnings() {
                        // Guard against calls not balanced with suppressWarnings()
                        if ( warn !== undefined ) {
                                mw.log.warn = warn;
                                mw.log.error = error;
                                warn = error = undefined;
                        }
                }

                function freshConfigCopy( custom ) {
                        var copy;
                        // Tests should mock all factors that directly influence the tested code.
                        // For backwards compatibility though we set mw.config to a fresh copy of the live
                        // config. This way any modifications made to mw.config during the test will not
                        // affect other tests, nor the global scope outside the test runner.
                        // This is a shallow copy, since overriding an array or object value via "custom"
                        // should replace it. Setting a config property means you override it, not extend it.
                        // NOTE: It is important that we suppress warnings because extend() will also access
                        // deprecated properties and trigger deprecation warnings from mw.log#deprecate.
                        suppressWarnings();
                        copy = $.extend( {}, liveConfig, custom );
                        restoreWarnings();

                        return copy;
                }

                function freshMessagesCopy( custom ) {
                        return $.extend( /*deep=*/true, {}, liveMessages, custom );
                }

                /**
                 * @param {jQuery.Event} event
                 * @param {jqXHR} jqXHR
                 * @param {Object} ajaxOptions
                 */
                function trackAjax( event, jqXHR, ajaxOptions ) {
                        ajaxRequests.push( { xhr: jqXHR, options: ajaxOptions } );
                }

                return function ( localEnv ) {
                        localEnv = $.extend( {
                                // QUnit
                                setup: $.noop,
                                teardown: $.noop,
                                // MediaWiki
                                config: {},
                                messages: {}
                        }, localEnv );

                        return {
                                setup: function () {

                                        // Greetings, mock environment!
                                        mw.config.values = freshConfigCopy( localEnv.config );
                                        mw.messages.values = freshMessagesCopy( localEnv.messages );
                                        this.suppressWarnings = suppressWarnings;
                                        this.restoreWarnings = restoreWarnings;

                                        // Start tracking ajax requests
                                        $( document ).on( 'ajaxSend', trackAjax );

                                        localEnv.setup.call( this );
                                },

                                teardown: function () {
                                        var timers, pending, $activeLen;

                                        localEnv.teardown.call( this );

                                        // Stop tracking ajax requests
                                        $( document ).off( 'ajaxSend', trackAjax );

                                        // Farewell, mock environment!
                                        mw.config.values = liveConfig;
                                        mw.messages.values = liveMessages;

                                        // As a convenience feature, automatically restore warnings if they're
                                        // still suppressed by the end of the test.
                                        restoreWarnings();

                                        // Tests should use fake timers or wait for animations to complete
                                        // Check for incomplete animations/requests/etc and throw if there are any.
                                        if ( $.timers && $.timers.length !== 0 ) {
                                                timers = $.timers.length;
                                                $.each( $.timers, function ( i, timer ) {
                                                        var node = timer.elem;
                                                        mw.log.warn( 'Unfinished animation #' + i + ' in ' + timer.queue + ' queue on ' +
                                                                mw.html.element( node.nodeName.toLowerCase(), $( node ).getAttrs() )
                                                        );
                                                } );
                                                // Force animations to stop to give the next test a clean start
                                                $.fx.stop();

                                                throw new Error( 'Unfinished animations: ' + timers );
                                        }

                                        // Test should use fake XHR, wait for requests, or call abort()
                                        $activeLen = $.active;
                                        if ( $activeLen !== undefined && $activeLen !== 0 ) {
                                                pending = $.grep( ajaxRequests, function ( ajax ) {
                                                        return ajax.xhr.state() === 'pending';
                                                } );
                                                if ( pending.length !== $activeLen ) {
                                                        mw.log.warn( 'Pending requests does not match jQuery.active count' );
                                                }
                                                // Force requests to stop to give the next test a clean start
                                                $.each( pending, function ( i, ajax ) {
                                                        mw.log.warn( 'Pending AJAX request #' + i, ajax.options );
                                                        ajax.xhr.abort();
                                                } );
                                                ajaxRequests = [];

                                                throw new Error( 'Pending AJAX requests: ' + pending.length + ' (active: ' + $activeLen + ')' );
                                        }
                                }
                        };
                };
        }() );

        // $.when stops as soon as one fails, which makes sense in most
        // practical scenarios, but not in a unit test where we really do
        // need to wait until all of them are finished.
        QUnit.whenPromisesComplete = function () {
                var altPromises = [];

                $.each( arguments, function ( i, arg ) {
                        var alt = $.Deferred();
                        altPromises.push( alt );

                        // Whether this one fails or not, forwards it to
                        // the 'done' (resolve) callback of the alternative promise.
                        arg.always( alt.resolve );
                } );

                return $.when.apply( $, altPromises );
        };

        /**
         * Recursively convert a node to a plain object representing its structure.
         * Only considers attributes and contents (elements and text nodes).
         * Attribute values are compared strictly and not normalised.
         *
         * @param {Node} node
         * @return {Object|string} Plain JavaScript value representing the node.
         */
        function getDomStructure( node ) {
                var $node, children, processedChildren, i, len, el;
                $node = $( node );
                if ( node.nodeType === Node.ELEMENT_NODE ) {
                        children = $node.contents();
                        processedChildren = [];
                        for ( i = 0, len = children.length; i < len; i++ ) {
                                el = children[ i ];
                                if ( el.nodeType === Node.ELEMENT_NODE || el.nodeType === Node.TEXT_NODE ) {
                                        processedChildren.push( getDomStructure( el ) );
                                }
                        }

                        return {
                                tagName: node.tagName,
                                attributes: $node.getAttrs(),
                                contents: processedChildren
                        };
                } else {
                        // Should be text node
                        return $node.text();
                }
        }

        /**
         * Gets structure of node for this HTML.
         *
         * @param {string} html HTML markup for one or more nodes.
         */
        function getHtmlStructure( html ) {
                var el = $( '<div>' ).append( html )[ 0 ];
                return getDomStructure( el );
        }

        /**
         * Add-on assertion helpers
         */
        // Define the add-ons
        addons = {

                // Expect boolean true
                assertTrue: function ( actual, message ) {
                        QUnit.push( actual === true, actual, true, message );
                },

                // Expect boolean false
                assertFalse: function ( actual, message ) {
                        QUnit.push( actual === false, actual, false, message );
                },

                // Expect numerical value less than X
                lt: function ( actual, expected, message ) {
                        QUnit.push( actual < expected, actual, 'less than ' + expected, message );
                },

                // Expect numerical value less than or equal to X
                ltOrEq: function ( actual, expected, message ) {
                        QUnit.push( actual <= expected, actual, 'less than or equal to ' + expected, message );
                },

                // Expect numerical value greater than X
                gt: function ( actual, expected, message ) {
                        QUnit.push( actual > expected, actual, 'greater than ' + expected, message );
                },

                // Expect numerical value greater than or equal to X
                gtOrEq: function ( actual, expected, message ) {
                        QUnit.push( actual >= expected, actual, 'greater than or equal to ' + expected, message );
                },

                /**
                 * Asserts that two HTML strings are structurally equivalent.
                 *
                 * @param {string} actualHtml Actual HTML markup.
                 * @param {string} expectedHtml Expected HTML markup
                 * @param {string} message Assertion message.
                 */
                htmlEqual: function ( actualHtml, expectedHtml, message ) {
                        var actual = getHtmlStructure( actualHtml ),
                                expected = getHtmlStructure( expectedHtml );

                        QUnit.push(
                                QUnit.equiv(
                                        actual,
                                        expected
                                ),
                                actual,
                                expected,
                                message
                        );
                },

                /**
                 * Asserts that two HTML strings are not structurally equivalent.
                 *
                 * @param {string} actualHtml Actual HTML markup.
                 * @param {string} expectedHtml Expected HTML markup.
                 * @param {string} message Assertion message.
                 */
                notHtmlEqual: function ( actualHtml, expectedHtml, message ) {
                        var actual = getHtmlStructure( actualHtml ),
                                expected = getHtmlStructure( expectedHtml );

                        QUnit.push(
                                !QUnit.equiv(
                                        actual,
                                        expected
                                ),
                                actual,
                                expected,
                                message
                        );
                }
        };

        $.extend( QUnit.assert, addons );

        /**
         * Small test suite to confirm proper functionality of the utilities and
         * initializations defined above in this file.
         */
        QUnit.module( 'test.mediawiki.qunit.testrunner', QUnit.newMwEnvironment( {
                setup: function () {
                        this.mwHtmlLive = mw.html;
                        mw.html = {
                                escape: function () {
                                        return 'mocked';
                                }
                        };
                },
                teardown: function () {
                        mw.html = this.mwHtmlLive;
                },
                config: {
                        testVar: 'foo'
                },
                messages: {
                        testMsg: 'Foo.'
                }
        } ) );

        QUnit.test( 'Setup', 3, function ( assert ) {
                assert.equal( mw.html.escape( 'foo' ), 'mocked', 'setup() callback was ran.' );
                assert.equal( mw.config.get( 'testVar' ), 'foo', 'config object applied' );
                assert.equal( mw.messages.get( 'testMsg' ), 'Foo.', 'messages object applied' );

                mw.config.set( 'testVar', 'bar' );
                mw.messages.set( 'testMsg', 'Bar.' );
        } );

        QUnit.test( 'Teardown', 2, function ( assert ) {
                assert.equal( mw.config.get( 'testVar' ), 'foo', 'config object restored and re-applied after test()' );
                assert.equal( mw.messages.get( 'testMsg' ), 'Foo.', 'messages object restored and re-applied after test()' );
        } );

        QUnit.test( 'Loader status', 2, function ( assert ) {
                var i, len, state,
                        modules = mw.loader.getModuleNames(),
                        error = [],
                        missing = [];

                for ( i = 0, len = modules.length; i < len; i++ ) {
                        state = mw.loader.getState( modules[ i ] );
                        if ( state === 'error' ) {
                                error.push( modules[ i ] );
                        } else if ( state === 'missing' ) {
                                missing.push( modules[ i ] );
                        }
                }

                assert.deepEqual( error, [], 'Modules in error state' );
                assert.deepEqual( missing, [], 'Modules in missing state' );
        } );

        QUnit.test( 'htmlEqual', 8, function ( assert ) {
                assert.htmlEqual(
                        '<div><p class="some classes" data-length="10">Child paragraph with <a href="http://example.com">A link</a></p>Regular text<span>A span</span></div>',
                        '<div><p data-length=\'10\'  class=\'some classes\'>Child paragraph with <a href=\'http://example.com\' >A link</a></p>Regular text<span>A span</span></div>',
                        'Attribute order, spacing and quotation marks (equal)'
                );

                assert.notHtmlEqual(
                        '<div><p class="some classes" data-length="10">Child paragraph with <a href="http://example.com">A link</a></p>Regular text<span>A span</span></div>',
                        '<div><p data-length=\'10\'  class=\'some more classes\'>Child paragraph with <a href=\'http://example.com\' >A link</a></p>Regular text<span>A span</span></div>',
                        'Attribute order, spacing and quotation marks (not equal)'
                );

                assert.htmlEqual(
                        '<label for="firstname" accesskey="f" class="important">First</label><input id="firstname" /><label for="lastname" accesskey="l" class="minor">Last</label><input id="lastname" />',
                        '<label for="firstname" accesskey="f" class="important">First</label><input id="firstname" /><label for="lastname" accesskey="l" class="minor">Last</label><input id="lastname" />',
                        'Multiple root nodes (equal)'
                );

                assert.notHtmlEqual(
                        '<label for="firstname" accesskey="f" class="important">First</label><input id="firstname" /><label for="lastname" accesskey="l" class="minor">Last</label><input id="lastname" />',
                        '<label for="firstname" accesskey="f" class="important">First</label><input id="firstname" /><label for="lastname" accesskey="l" class="important" >Last</label><input id="lastname" />',
                        'Multiple root nodes (not equal, last label node is different)'
                );

                assert.htmlEqual(
                        'fo&quot;o<br/>b&gt;ar',
                        'fo"o<br/>b>ar',
                        'Extra escaping is equal'
                );
                assert.notHtmlEqual(
                        'foo&lt;br/&gt;bar',
                        'foo<br/>bar',
                        'Text escaping (not equal)'
                );

                assert.htmlEqual(
                        'foo<a href="http://example.com">example</a>bar',
                        'foo<a href="http://example.com">example</a>bar',
                        'Outer text nodes are compared (equal)'
                );

                assert.notHtmlEqual(
                        'foo<a href="http://example.com">example</a>bar',
                        'foo<a href="http://example.com">example</a>quux',
                        'Outer text nodes are compared (last text node different)'
                );

        } );

        QUnit.module( 'test.mediawiki.qunit.testrunner-after', QUnit.newMwEnvironment() );

        QUnit.test( 'Teardown', 3, function ( assert ) {
                assert.equal( mw.html.escape( '<' ), '&lt;', 'teardown() callback was ran.' );
                assert.equal( mw.config.get( 'testVar' ), null, 'config object restored to live in next module()' );
                assert.equal( mw.messages.get( 'testMsg' ), null, 'messages object restored to live in next module()' );
        } );

}( jQuery, mediaWiki, QUnit ) );