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test_transitions_computed_value_combinations.html
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test_transitions_computed_value_combinations.html
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<!DOCTYPE HTML>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=435441
-->
<head>
<title>Test for Bug 435441</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
</head>
<body>
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=435441">Mozilla Bug 435441</a>
<div id="content" style="display: none"></div>
<pre id="test">
<script type="application/javascript">
/** Test for Bug 435441 **/
/**
* I want to test a reasonable number of combinations rather than all of
* them, but I also want the test results to be reproducable. So use a
* simple random number generator with my own seed. See
* http://en.wikipedia.org/wiki/Linear_congruential_generator
* (Using the numbers from Numerical Recipes.)
*/
var rand_state = 1938266273; // a randomly (once) generated number in [0,2^32)
var all_integers = true;
function myrand()
{
rand_state = ((rand_state * 1664525) + 1013904223) % 0x100000000;
all_integers = all_integers &&
Math.ceil(rand_state) == Math.floor(rand_state);
return rand_state / 0x100000000; // return value in [0,1)
}
// We want to test a bunch of values for each property.
// Each of these values will also have a "computed" property filled in
// below, so that we ensure it always computes to the same value.
var values = {
"transition-duration":
[
{ lone: true, specified: "initial" },
{ lone: false, specified: "2s" },
{ lone: false, specified: "0s" },
{ lone: false, specified: "430ms" },
{ lone: false, specified: "1s" },
],
"transition-property":
[
{ lone: true, specified: "initial" },
{ lone: true, specified: "none" },
{ lone: true, specified: "all" },
{ lone: false, specified: "color" },
{ lone: false, specified: "border-spacing" },
// Make sure to test the "unknown property" case.
{ lone: false, specified: "unsupported-property" },
{ lone: false, specified: "-other-unsupported-property" },
],
"transition-timing-function":
[
{ lone: true, specified: "initial" },
{ lone: false, specified: "linear" },
{ lone: false, specified: "ease" },
{ lone: false, specified: "ease-in-out" },
{ lone: false, specified: "cubic-bezier(0, 0, 0.63, 1.00)" },
],
"transition-delay":
[
{ lone: true, specified: "initial" },
{ lone: false, specified: "2s" },
{ lone: false, specified: "0s" },
{ lone: false, specified: "430ms" },
{ lone: false, specified: "-1s" },
],
};
var elt = document.getElementById("content");
var cs = getComputedStyle(elt, "");
// Add the "computed" property to all of the above values.
for (var prop in values) {
var valueset = values[prop];
for (var index in valueset) {
var item = valueset[index];
elt.style.setProperty(prop, item.specified, "");
item.computed = cs.getPropertyValue(prop);
elt.style.removeProperty(prop);
isnot(item.computed, "", "computed value must not be empty");
if (index != 0) {
isnot(item.computed, valueset[index-1].computed,
"computed value must not be the same as the last one");
}
}
}
var child = document.createElement("div");
elt.appendChild(child);
var child_cs = getComputedStyle(child, "");
// Now test a hundred random combinations of values on the parent and
// child.
for (var iteration = 0; iteration < 100; ++iteration) {
// Figure out values on the parent.
var parent_vals = {};
for (var prop in values) {
var valueset = values[prop];
var list_length = Math.ceil(Math.pow(myrand(), 2) * 6);
// 41% chance of length 1
var specified = [];
var computed = [];
for (var i = 0; i < list_length; ++i) {
var index;
do {
index = Math.floor(myrand() * valueset.length);
} while (list_length != 1 && valueset[index].lone);
specified.push(valueset[index].specified);
computed.push(valueset[index].computed);
}
parent_vals[prop] = { specified: specified.join(", "),
computed: computed.join(", ") };
elt.style.setProperty(prop, parent_vals[prop].specified, "");
}
// Figure out values on the child.
var child_vals = {};
for (var prop in values) {
var valueset = values[prop];
// Use 0 as a magic value for "inherit".
var list_length = Math.floor(Math.pow(myrand(), 1.5) * 7);
// 27% chance of inherit
// 16% chance of length 1
if (list_length == 0) {
child_vals[prop] = { specified: "inherit",
computed: parent_vals[prop].computed };
} else {
var specified = [];
var computed = [];
for (var i = 0; i < list_length; ++i) {
var index;
do {
index = Math.floor(myrand() * valueset.length);
} while (list_length != 1 && valueset[index].lone);
specified.push(valueset[index].specified);
computed.push(valueset[index].computed);
}
child_vals[prop] = { specified: specified.join(", "),
computed: computed.join(", ") };
}
child.style.setProperty(prop, child_vals[prop].specified, "");
}
// Test computed values
for (var prop in values) {
is(cs.getPropertyValue(prop), parent_vals[prop].computed,
"computed value of " + prop + ": " + parent_vals[prop].specified +
" on parent.");
is(child_cs.getPropertyValue(prop), child_vals[prop].computed,
"computed value of " + prop + ": " + child_vals[prop].specified +
" on child.");
}
}
ok(all_integers, "pseudo-random number generator kept its numbers " +
"as integers throughout run");
</script>
</pre>
</body>
</html>