css/css-transitions/pseudo-elements-001.html

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title>CSS Transitions Test: Transitioning Pseudo Elements</title>
        <meta name="assert" content="Test checks that transitions are run on pseudo elements">
        <link rel="help" title="2.1. The 'transition-property' Property" href="http://www.w3.org/TR/css3-transitions/#transition-property-property">
        <link rel="help" title="CSS21 - 12.1 The :before and :after pseudo-elements" href="http://www.w3.org/TR/CSS21/generate.html#before-after-content">
        <link rel="help" title="CSS3 Generated and Replaced Content Module" href="http://www.w3.org/TR/css3-content/">
        <link rel="author" title="Rodney Rehm" href="http://rodneyrehm.de/en/">
        <meta name="flags" content="dom">

        <script src="/resources/testharness.js" type="text/javascript"></script>
        <script src="/resources/testharnessreport.js" type="text/javascript"></script>

        <script src="./support/vendorPrefix.js" type="text/javascript"></script>
        <script src="./support/helper.js" type="text/javascript"></script>
        <script src="./support/runParallelAsyncHarness.js" type="text/javascript"></script>
        <script src="./support/generalParallelTest.js" type="text/javascript"></script>
        <script src="./support/properties.js" type="text/javascript"></script>

        <style type="text/css">
            #offscreen {
                position: absolute;
                top: -100000px;
                left: -100000px;
                width: 100000px;
                height: 100000px;
            }
        </style>
    </head>
    <body>
        <!-- required by testharnessreport.js -->
        <div id="log"></div>
        <!-- elements used for testing -->
        <div id="fixture" class="fixture">
            <div class="container">
                <div class="transition">Text sample</div>
            </div>
        </div>
        <div id="offscreen"></div>

        <!--
            SEE ./support/README.md for an abstract explanation of the test procedure
            http://test.csswg.org/source/contributors/rodneyrehm/submitted/css3-transitions/README.md
        -->

        <script>

            // this test takes its time, give it a minute to run
            var timeout = 60000;
            setup({timeout: timeout});

            var tests = [
                {
                    name: "transition padding-left on :before",
                    pseudo: 'before',
                    property: 'padding-left',
                    flags: {},
                    from: {'padding-left': '1px', 'content': '""'},
                    to: {'padding-left': '10px'}
                }, {
                    name: "transition padding-left on :after",
                    pseudo: 'after',
                    property: 'padding-left',
                    flags: {},
                    from: {'padding-left': '1px', 'content': '""'},
                    to: {'padding-left': '10px'}
                }, {
                    name: "transition padding-left on :before, changing content",
                    pseudo: 'before',
                    property: 'padding-left',
                    flags: {},
                    from: {'padding-left': '1px', 'content': '"1"'},
                    to: {'padding-left': '10px', 'content': '"2"'}
                }, {
                    name: "transition padding-left on :after, changing content",
                    pseudo: 'after',
                    property: 'padding-left',
                    flags: {},
                    from: {'padding-left': '1px', 'content': '"1"'},
                    to: {'padding-left': '10px', 'content': '"2"'}
                }
            ];

            // general transition-duration
            var duration = '2s';

            runParallelAsyncHarness({
                // array of test data
                tests: tests,
                // the number of tests to run in parallel
                testsPerSlice: 50,
                // milliseconds to wait before calling teardown and ending test
                duration: parseFloat(duration) * 1000,
                // prepare individual test
                setup: function(data, options) {
                    generalParallelTest.setup(data, options);

                    var styles = {};
                    styles['.fixture'] = {};
                    styles['.container'] = data.parentStyle;
                    styles['.container.to'] = {};
                    styles['.container.how'] = {};
                    styles['.transition'] = {};
                    styles['.transition:' + data.pseudo.name] = data.from;
                    styles['.transition.how:' + data.pseudo.name] = {transition: 'all ' + duration + ' linear 0s'};
                    styles['.transition.to:' + data.pseudo.name] = data.to;

                    generalParallelTest.addStyles(data, options, styles);
                },
                // cleanup after individual test
                teardown: generalParallelTest.teardown,
                // invoked prior to running a slice of tests
                sliceStart: generalParallelTest.sliceStart,
                // invoked after running a slice of tests
                sliceDone: generalParallelTest.sliceDone,
                // test cases, make them as granular as possible
                cases: {
                    // test property values while transitioning
                    // values.start kicks off a transition
                    'values': {
                        // run actual test, assertions can be used here!
                        start: function(test, data, options) {
                            // identify initial and target values
                            generalParallelTest.getStyle(data);
                            // make sure values differ, if they don't, the property could most likely not be parsed
                            assert_not_equals(data.pseudo.from, data.pseudo.to, "initial and target values may not match");
                            // kick off the transition
                            generalParallelTest.startTransition(data);

                            // make sure we didn't get the target value immediately.
                            // If we did, there wouldn't be a transition!
                            var current = data.pseudo.computedStyle(data.property);
                            assert_not_equals(current, data.pseudo.to, "must not be target value after start");
                        },
                        done: function(test, data, options) {
                            // make sure the property's value were neither initial nor target while transitioning
                            test.step(generalParallelTest.assertIntermediateValuesFunc(data, 'pseudo'));
                        }
                    }
                },
                // called once all tests are done
                done: generalParallelTest.done
            });
        </script>
    </body>
</html>