<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>CSS Transitions Test: transitioning inherited property values</title>
<meta name="timeout" content="long">
<meta name="assert" content="Test checks that inherited property values that are transitioned on a parent element don't start a transition">
<link rel="help" title="3. Starting of transitions" href="http://www.w3.org/TR/css3-transitions/#starting">
<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>
// http://www.w3.org/TR/css3-transitions/#starting
// Implementations also must not start a transition when the computed value changes because
// it is inherited (directly or indirectly) from another element that is transitioning the same property.
// this test takes its time, give it a minute to run
var timeout = 60000;
setup({timeout: timeout});
var tests = getPropertyTests();
// for testing, limit to a couple of iterations
// tests = tests.slice(10, 30);
// or filter using one of:
// tests = filterPropertyTests(tests, "background-color color(rgba)");
// tests = filterPropertyTests(tests, ["background-color color(rgba)", ...]);
// tests = filterPropertyTests(tests, /^background-color/);
// 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) {
// clone and overwrite initial styles to be
// applied to #transition
var inherited = extend({}, data.from);
inherited[data.property] = 'inherit';
var styles = {
// as we're testing inheritance, #fixture is our new parent
'.fixture': data.parentStyle,
// all styles including transition apply to to #container so they
// can inherit down to #transition
'.container': extend({}, data.parentStyle, data.from),
'.container.to': data.to,
'.container.how': {transition: addVendorPrefix(data.property) + ' ' + duration + ' linear 0s'},
// #transition only inherits and listens for transition events
'.transition': inherited,
'.transition.to' : {},
'.transition.how' : {transition: addVendorPrefix(data.property) + ' ' + duration + ' linear 0s'}
};
generalParallelTest.setup(data, options);
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.transition.from, data.transition.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.transition.computedStyle(data.property);
assert_not_equals(current, data.transition.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, 'transition'));
}
},
// test TransitionEnd events
'events': {
done: function(test, data, options) {
// make sure there were no events on parent
test.step(generalParallelTest.assertExpectedEventsFunc(data, 'container', addVendorPrefix(data.property) + ":" + duration));
// make sure we got the event for the tested property only
test.step(generalParallelTest.assertExpectedEventsFunc(data, 'transition', ""));
}
}
},
// called once all tests are done
done: generalParallelTest.done
});
</script>
</body>
</html>
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