pagevistestharness.js

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//

// Helper functions for Page Visibility tests

//

var VISIBILITY_STATES =

    HIDDEN: "hidden",

    VISIBLE: "visible"

};

var feature_check = false;

//

// All test() functions in the WebPerf PageVis test suite should use pv_test() instead.

//

// pv_test() validates the document.hidden and document.visibilityState attributes

// exist prior to running tests and immediately shows a failure if they do not.

//

function pv_test(func, msg, doc)

    if (!doc)

        doc = document;

    // only run the feature check once, unless func == null, in which case,

    // this call is intended as a feature check

    if (!feature_check)

        feature_check = true;

        var hiddenVal = doc.hidden;

        var visStateVal = doc.visibilityState;

        // show a single error that the Page Visibility feature is undefined

        test(function()

            assert_true(hiddenVal !== undefined && hiddenVal != null,

                        "document.hidden is defined and not null.");},

                        "document.hidden is defined and not null.");

        test(function()

            assert_true(visStateVal !== undefined && hiddenVal != null,

                        "document.visibilityState is defined and not null.");},

                        "document.visibilityState is defined and not null.");

    if (func)

        test(func, msg);

function test_feature_exists(doc, msg)

    if (!msg)

        msg = "";

    var hiddenMsg = "document.hidden is defined" + msg + ".";

    var stateMsg = "document.visibilityState is defined" + msg + ".";

    pv_test(function(){assert_not_equals(document.hidden, undefined, hiddenMsg);}, hiddenMsg, doc);

    pv_test(function(){assert_not_equals(document.visibilityState, undefined, stateMsg);}, stateMsg, doc);

//

// Common helper functions

//

function test_true(value, msg)

    pv_test(function() { assert_true(value, msg); }, msg);

function test_equals(value, equals, msg)

    pv_test(function() { assert_equals(value, equals, msg); }, msg);

//

// asynchronous test helper functions

//

function add_async_result(test_obj, pass_state)

    // add assertion to manual test for the pass state

    test_obj.step(function() { assert_true(pass_state) });

    // end manual test

    test_obj.done();

function add_async_result_assert(test_obj, func)

    // add assertion to manual test for the pass state

    test_obj.step(func);

    // end manual test

    test_obj.done();

var open_link;

function TabSwitch()

    //var open_link = window.open("http://www.bing.com");

    open_link = window.open('', '_blank');

    step_timeout(function() { open_link.close(); }, 2000);