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Test Info: Warnings
- This test has a WPT meta file that expects 107 subtest issues.
- This WPT test may be referenced by the following Test IDs:
- /css/css-values/random-computed.tentative.html - WPT Dashboard Interop Dashboard
<!DOCTYPE html>
<link rel="author" title="sam@webkit.org">
<meta name="timeout" content="long">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="../support/computed-testcommon.js"></script>
<div id="container">
<div id="target"></div>
</div>
<style>
@property --x {
syntax: "<number>";
inherits: true;
initial-value: 3;
}
@property --y {
syntax: "<number>";
inherits: true;
initial-value: 3;
}
@property --random-length-1 {
syntax: "<length>";
inherits: true;
initial-value: 3px;
}
@property --random-length-2 {
syntax: "<length>";
inherits: true;
initial-value: 3px;
}
@property --random-in-initial {
syntax: "<number>";
inherits: false;
initial-value: random(1, 30);
}
#container {
font-size: 30px;
}
.randomNoIdentifier {
width: random(0px, 100px);
height: random(0px, 100px);
left: random(0px, 100000px);
right: random(0px, 100000px);
margin: random(0px, 100000px) random(0px, 100000px);
--x: random(0, 100);
--y: random(0, 100);
--random-length-1: random(fixed random(0, 1), 10px, 100px);
--random-length-2: random(fixed random(0, 1), 10px, 100px);
}
.randomMatchElement {
width: random(element-shared, 0px, 100px);
height: random(element-shared, 0px, 100px);
left: random(element-shared, 0px, 100000px);
right: random(element-shared, 0px, 100000px);
margin: random(element-shared 0px, 100000px) random(element-shared 0px, 100000px);
translate: random(element-shared, 10%, 30%);
scale: random(element-shared, 1, 3) random(element-shared, 3, 9);
}
.randomIdentifier {
width: random(--identifier, 0px, 100px);
height: random(--identifier, 0px, 100px);
left: random(--identifier, 0px, 100000px);
right: random(--identifier, 0px, 100000px);
margin: random(--identifier 0px, 100000px) random(--identifier 0px, 100000px);
}
.randomMatchElementAndIdentifier {
width: random(element-shared --other-identifier, 0px, 100px);
height: random(element-shared --other-identifier, 0px, 100px);
left: random(element-shared --other-identifier, 0px, 100000px);
right: random(element-shared --other-identifier, 0px, 100000px);
margin: random(element-shared --other-identifier 0px, 100000px) random(element-shared --other-identifier 0px, 100000px);
}
.randomFixed {
width: random(fixed 0.5, 10px, 100px);
height: random(fixed 0.5, 10px, 100px);
left: random(fixed 0.5, 0px, 100000px);
right: random(fixed 0.5, 0px, 100000px);
margin: random(fixed 0.5 0px, 100000px) random(fixed 0.5 0px, 100000px);
}
</style>
<script>
// Run each test a number of times to increase the likelyhood that failure is not the cause of random chance.
const iterations = 5;
// Since actual and expected values are generated randomly, `assert_equals()`
// does not generate deterministic test failure output. Chrome relies on test
// failure output to be deterministic and stable for failing test expectations.
function test_random_equals(actual, expected, message = "Random values should be equal") {
assert_equals(actual, expected, message);
}
function test_random_computed_value(property, specified, computed, titleExtra, options = {}) {
if (!computed)
computed = specified;
test(() => {
for (i = 0; i < iterations; ++i) {
const target = document.getElementById('target');
assert_true(property in getComputedStyle(target), property + " doesn't seem to be supported in the computed style");
assert_true(CSS.supports(property, specified), "'" + specified + "' is a supported value for " + property + ".");
target.style[property] = '';
target.style[property] = specified;
let readValue = getComputedStyle(target)[property];
if (options.comparisonFunction) {
options.comparisonFunction(readValue, computed);
} else if (Array.isArray(computed)) {
assert_in_array(readValue, computed);
} else {
test_random_equals(readValue, computed);
}
if (readValue !== specified) {
target.style[property] = '';
target.style[property] = readValue;
test_random_equals(getComputedStyle(target)[property], readValue,
'computed value should round-trip');
}
}
}, `Property ${property} value '${specified}'${titleExtra ? ' ' + titleExtra : ''}`);
}
function test_random_computed_value_greater_or_lower_than(property, specified, expected, titleExtra) {
test(() => {
for (i = 0; i < iterations; ++i) {
const target = document.getElementById('target');
assert_true(property in getComputedStyle(target), property + " doesn't seem to be supported in the computed style");
assert_true(CSS.supports(property, specified), "'" + specified + "' is a supported value for " + property + ".");
target.style[property] = '';
target.style[property] = specified;
let readValue = parseFloat(getComputedStyle(target)[property]);
assert_true(isFinite(readValue), specified + " expected finite value but got " + readValue)
assert_false(isNaN(readValue), specified + " expected finite value but got " + readValue)
if (expected > 0)
assert_greater_than_equal(readValue, expected, specified);
else
assert_less_than_equal(readValue, expected, specified);
}
}, `Property ${property} value '${specified}'${titleExtra ? ' ' + titleExtra : ''}`);
}
function test_random_computed_value_in_range(property, specified, computedMin, computedMax, titleExtra) {
test(() => {
for (i = 0; i < iterations; ++i) {
const target = document.getElementById('target');
assert_true(property in getComputedStyle(target), property + " doesn't seem to be supported in the computed style");
assert_true(CSS.supports(property, specified), "'" + specified + "' is a supported value for " + property + ".");
target.style[property] = '';
target.style[property] = specified;
let readValue = getComputedStyle(target)[property];
let readValueNumber = parseFloat(readValue);
let computedMinNumber = parseFloat(computedMin);
let computedMaxNumber = parseFloat(computedMax);
assert_greater_than_equal(readValueNumber, computedMinNumber, specified);
assert_less_than_equal(readValueNumber, computedMaxNumber, specified);
}
}, `Property ${property} value '${specified}'${titleExtra ? ' ' + titleExtra : ''}`);
}
function test_pseudo_element_random_computed_value_in_range(property, pseudo_element, specified, computedMin, computedMax, titleExtra) {
test(() => {
for (i = 0; i < iterations; ++i) {
const styleEl = document.head.appendChild(document.createElement("style"));
styleEl.innerHTML = `#target${pseudo_element} \{ ${property}: ${specified}; \}`;
try {
const target = document.getElementById("target");
let readValue = getComputedStyle(target, pseudo_element)[property];
let readValueNumber = parseFloat(readValue);
let computedMinNumber = parseFloat(computedMin);
let computedMaxNumber = parseFloat(computedMax);
assert_greater_than_equal(readValueNumber, computedMinNumber, specified);
assert_less_than_equal(readValueNumber, computedMaxNumber, specified);
} finally {
document.head.removeChild(styleEl);
}
}
}, `Property ${property} value on pseudo element '${pseudo_element}' '${specified}'${titleExtra ? ' ' + titleExtra : ''}`);
}
function test_random_computed_value_has_fixed(property, specified, minPercentage, maxPercentage, expectedFixedValue = undefined, titleExtra = undefined) {
test(() => {
for (i = 0; i < iterations; ++i) {
const target = document.getElementById('target');
assert_true(property in getComputedStyle(target), property + " doesn't seem to be supported in the computed style");
assert_true(CSS.supports(property, specified), "'" + specified + "' is a supported value for " + property + ".");
target.style[property] = '';
target.style[property] = specified;
let readValue = getComputedStyle(target)[property];
// strip 'random(' and ')'.
let stippedReadValue = readValue.replace('random(', '').replace(')', '');
// split into the three main components
let [fixedComponent, minComponent, maxComponent] = stippedReadValue.split(', ');
// split fixed component into its two components
let [fixedString, fixedValue] = fixedComponent.split(' ');
test_random_equals(fixedString, 'fixed', `Computed value for ${specified} should include 'fixed'`);
if (expectedFixedValue) {
test_random_equals(parseFloat(fixedValue), expectedFixedValue, `Random value for ${specified} should be ${expectedFixedValue}`);
} else {
assert_greater_than_equal(parseFloat(fixedValue), 0, specified);
assert_less_than(parseFloat(fixedValue), 1, specified);
}
test_random_equals(minComponent, minPercentage, specified);
test_random_equals(maxComponent, maxPercentage, specified);
}
}, `Property ${property} value '${specified}'${titleExtra ? ' ' + titleExtra : ''}`);
}
function test_random_base_is_not_1(property, specified) {
test(() => {
for (i = 0; i < iterations; ++i) {
const target = document.getElementById('target');
assert_true(property in getComputedStyle(target), property + " doesn't seem to be supported in the computed style");
assert_true(CSS.supports(property, specified), "'" + specified + "' is a supported value for " + property + ".");
target.style[property] = '';
target.style[property] = specified;
const computed = target.computedStyleMap().get(property);
assert_true(computed instanceof CSSUnitValue);
assert_false(computed.value == 100.0, "Random base value should not be clamped to 1");
}
}, `Property ${property} value '${specified}'`);
}
function test_random_shared_by_property(property, random_value, random_element_shared_value) {
test(() => {
const holder = document.createElement('div');
document.body.appendChild(holder);
var randomValuesSameOnDifferentElements = true;
try {
for (let i = 0; i < iterations; ++i) {
const t1 = document.createElement('div');
holder.appendChild(t1);
const t2 = document.createElement('div');
holder.appendChild(t2);
t1.style[property] = random_value;
t2.style[property] = random_value;
let t1Computed = getComputedStyle(t1)[property];
let t2Computed = getComputedStyle(t2)[property];
if (t1Computed != t2Computed) {
randomValuesSameOnDifferentElements = false;
}
t1.style[property] = random_element_shared_value;
t2.style[property] = random_element_shared_value;
let t1ComputedElementShared = getComputedStyle(t1)[property];
let t2ComputedElementShared = getComputedStyle(t2)[property];
test_random_equals(t1ComputedElementShared, t2ComputedElementShared,
`${random_element_shared_value} values on different elements should be equal`);
}
assert_false(randomValuesSameOnDifferentElements,
`${random_value} values on different elements should not be equal`);
} finally {
document.body.removeChild(holder);
}
}, `Shared by property '${property}' with values '${random_value}', '${random_element_shared_value}'`);
}
const property = 'scale';
test_random_computed_value_in_range(property, 'random(1, 11)', '1', '11');
test_random_computed_value_in_range(property, 'random(--foo, 2, 12)', '2', '12');
test_random_computed_value_in_range(property, 'random(--foo element-shared, 3, 13)', '3', '13');
test_random_computed_value_in_range(property, 'random(element-shared --foo, 4, 14)', '4', '14');
test_random_computed_value(property, 'random(0, 10, 5)', ['0', '5', '10']);
test_random_computed_value(property, 'random(--foo, 10, 20, 5)', ['10', '15', '20']);
test_random_computed_value(property, 'random(--foo element-shared, 20, 30, 5)', ['20', '25', '30']);
test_random_computed_value(property, 'random(element-shared --foo, 30, 40, 5)', ['30', '35', '40']);
// Test out of order.
test_random_computed_value(property, 'random(100, 10)', '100');
test_random_computed_value(property, 'random(-10, -100)', '-10');
// Test negative range values
test_random_computed_value_in_range(property, 'random(-100, -10)', '-100', '-10');
// Test negative step values (treated as if step is not there)
test_random_computed_value_in_range(property, 'random(40, 50, -5)', '40', '50');
// Test nested expressions
test_random_computed_value_in_range(property, 'random(5 * 1, 30 / 2)', '5', '15');
// Test nested in expressions
test_random_computed_value_in_range(property, 'calc(2 * random(6, 16))', '12', '32');
// Test NaN
test_random_computed_value(property, 'random(NaN, 100)', '0');
test_random_computed_value(property, 'random(10, NaN)', '0');
test_random_computed_value(property, 'random(NaN, NaN)', '0');
test_random_computed_value(property, 'random(NaN, 100, 10)', '0');
test_random_computed_value(property, 'random(10, NaN, 10)', '0');
test_random_computed_value(property, 'random(NaN, NaN, 10)', '0');
test_random_computed_value(property, 'random(NaN, 100, NaN)', '0');
test_random_computed_value(property, 'random(10, NaN, NaN)', '0');
test_random_computed_value(property, 'random(NaN, NaN, NaN)', '0');
test_random_computed_value(property, 'random(10, 100, NaN)', '0');
test_random_computed_value(property, 'calc(10 + random(NaN, 100))', '0');
test_random_computed_value(property, 'calc(10 + random(10, NaN))', '0');
test_random_computed_value(property, 'calc(10 + random(NaN, NaN))', '0');
test_random_computed_value(property, 'calc(10 + random(NaN, 100, 10))', '0');
test_random_computed_value(property, 'calc(10 + random(10, NaN, 10))', '0');
test_random_computed_value(property, 'calc(10 + random(NaN, NaN, 10))', '0');
test_random_computed_value(property, 'calc(10 + random(NaN, 100, NaN))', '0');
test_random_computed_value(property, 'calc(10 + random(10, NaN, NaN))', '0');
test_random_computed_value(property, 'calc(10 + random(NaN, NaN, NaN))', '0');
test_random_computed_value(property, 'calc(10 + random(10, 100, NaN))', '0');
// Test infinity
const REALLY_LARGE = 1e6;
const REALLY_LARGE_NEGATIVE = -REALLY_LARGE;
test_random_computed_value_greater_or_lower_than(property, 'random(infinity, 100)', REALLY_LARGE);
test_random_computed_value_greater_or_lower_than(property, 'random(infinity, infinity)', REALLY_LARGE);
test_random_computed_value_greater_or_lower_than(property, 'random(infinity, 100, 10)', REALLY_LARGE);
test_random_computed_value_greater_or_lower_than(property, 'random(infinity, infinity, 10)', REALLY_LARGE);
test_random_computed_value_greater_or_lower_than(property, 'random(infinity, 100, infinity)', REALLY_LARGE);
test_random_computed_value_greater_or_lower_than(property, 'random(infinity, infinity, infinity)', REALLY_LARGE);
test_random_computed_value_greater_or_lower_than(property, 'calc(10 + random(infinity, 100))', REALLY_LARGE);
test_random_computed_value_greater_or_lower_than(property, 'calc(10 + random(infinity, infinity))', REALLY_LARGE);
test_random_computed_value_greater_or_lower_than(property, 'calc(10 + random(infinity, infinity, 10))', REALLY_LARGE);
test_random_computed_value_greater_or_lower_than(property, 'calc(10 + random(infinity, 100, infinity))', REALLY_LARGE);
test_random_computed_value_greater_or_lower_than(property, 'calc(10 + random(infinity, infinity, infinity))', REALLY_LARGE);
test_random_computed_value_greater_or_lower_than(property, 'calc(10 + random(infinity, 100, 10))', REALLY_LARGE);
test_random_computed_value(property, 'random(10, infinity)', '0');
test_random_computed_value(property, 'random(10, infinity, 10)', '0');
test_random_computed_value(property, 'random(10, infinity, infinity)', '0');
test_random_computed_value(property, 'calc(10 + random(10, infinity))', '0');
test_random_computed_value(property, 'calc(10 + random(10, infinity, 10))', '0');
test_random_computed_value(property, 'calc(10 + random(10, infinity, infinity))', '0');
test_random_computed_value(property, 'random(10, 100, infinity)', '10');
test_random_computed_value(property, 'calc(10 + random(10, 100, infinity))', '20');
// Negative steps, even infinitely negative steps, are ignored.
test_random_computed_value_in_range(property, 'random(10, 100, -infinity)', '10', '100');
test_random_computed_value_in_range(property, 'calc(10 + random(10, 100, -infinity))', '20', '110');
// Test pseudo on psuedo elements
test_pseudo_element_random_computed_value_in_range(property, '::before', 'random(7, 17)', '7', '17');
test_pseudo_element_random_computed_value_in_range(property, '::before', 'random(--bar, 8, 18)', '8', '18');
test_pseudo_element_random_computed_value_in_range(property, '::before', 'random(element-shared, 9, 19)', '9', '19');
test_pseudo_element_random_computed_value_in_range(property, '::before', 'random(element-shared --foo, 10, 20)', '10', '20');
// Test unresolvable percentage values
test_random_computed_value_has_fixed('translate', 'random(10%, 100%)', '10%', '100%');
test_random_computed_value_has_fixed('translate', 'random(3 * 10% , 10 * 10%)', '30%', '100%');
test_random_computed_value_has_fixed('translate', 'random(10%, 1%)', '10%', '1%');
test_random_computed_value_has_fixed('translate', 'random(--identifier element-shared, 10%, 100%)', '10%', '100%');
// Test resolvable percentage values
test_random_computed_value('font-size', 'random(30%, 10%)', '9px');
test_random_computed_value('font-size', 'random(10px * 10% / 1%, 0%)', '100px');
// Test out of range math functions for fixed value
test_random_base_is_not_1('width', 'random(fixed random(1, 2), 10px, 100px)');
test_random_computed_value_has_fixed('translate', 'random(fixed random(-2, -1), 10%, 100%)', '10%', '100%', 0);
// Random inside function
test_random_computed_value('color', 'rgb(random(30, 10) random(60, 10) random(90, 10))', 'rgb(30, 60, 90)');
test_random_computed_value('color', 'rgb(from blue random(51, 10) random(g + 51, g) random(b, b))', 'color(srgb 0.2 0.2 1)');
test_random_computed_value('color', 'color-mix(in srgb, rgb(random(30, 10) 0 0), rgb(random(21, 10) 0 0))', 'color(srgb 0.1 0 0)');
test_random_computed_value('math-depth', 'add(random(30, 10))', '30');
test_random_computed_value('view-transition-name', 'ident("myident" random(30, 10))', 'myident30');
test_random_computed_value('background-image', 'image-set(url("http://example.com/image.png") calc(random(fixed 0.3, 0, 10) * 1x))', 'image-set(url("http://example.com/image.png") 3dppx)');
test_random_computed_value('aspect-ratio', 'random(3, 1) / random(9, 6)', '3 / 9');
test_random_computed_value('filter', 'drop-shadow(random(3px, 1px) random(6px, 1px) random(9px, 1px) black)', 'drop-shadow(rgb(0, 0, 0) 3px 6px 9px)');
test_random_computed_value('font-variation-settings', '"wght" random(300, 100)', '"wght" 300');
test_random_computed_value('font-feature-settings', '"liga" random(3, 1)', '"liga" 3');
test_random_computed_value('font-style', 'oblique random(90deg, 10deg)', 'oblique 90deg');
test_random_computed_value('font-palette', 'palette-mix(in lch, --blue calc(90% * random(1, 0)), --yellow 10%)', 'palette-mix(in lch, --blue 90%, --yellow)');
test_random_computed_value('font-palette', 'palette-mix(in lch, --blue random(90%, 10%), --yellow 10%)', 'palette-mix(in lch, --blue 90%, --yellow)');
test_random_computed_value('animation-timeline', 'view(random(10px, 10px) random(30px, 10px))', 'view(10px 30px)');
test_random_computed_value('color', 'light-dark(rgb(random(30, 10) random(60, 10) random(90, 10)), rgb(random(30, 10) random(60, 10) random(90, 10)))',
'rgb(30, 60, 90)');
test_random_computed_value('rotate',
'random(1, 0) random(1, 0) 1 90deg',
'1 1 1 90deg');
test_random_computed_value('rotate',
'x random(90deg, 30deg)',
'x 90deg');
test_random_computed_value('corner-shape',
'superellipse(random(3, 1))',
'superellipse(3)');
test_random_computed_value('offset-path',
'ray(random(30deg, 10deg))',
'ray(30deg)');
test_random_shared_by_property('color',
'color-mix(in srgb, rgb(from blue random(10, 30) random(g, g + 30) random(b, b)), rgb(random(10, 90) 0 0))',
'color-mix(in srgb, rgb(from blue random(element-shared, 10, 30) random(element-shared, g, g + 30) random(element-shared, b, b)), rgb(random(element-shared, 10, 90) 0 0))');
test_random_shared_by_property('math-depth', 'add(random(1, 100))', 'add(random(element-shared, 1, 100))');
test_random_shared_by_property('view-transition-name',
'ident("myident" random(1, 100))',
'ident("myident" random(element-shared, 1, 100))');
test_random_shared_by_property('aspect-ratio', 'random(1, 3, 1) / random(3, 9, 1)', 'random(element-shared, 1, 3, 1) / random(element-shared, 3, 9, 1)');
test_random_shared_by_property('filter', 'drop-shadow(random(1px, 3px) random(1px, 6px) random(1px, 9px) black)', 'drop-shadow(random(element-shared, 1px, 3px) random(element-shared, 1px, 6px) random(element-shared, 1px, 9px) black)');
test_random_shared_by_property('font-variation-settings', '"wght" random(100, 900)', '"wght" random(element-shared, 100, 900)');
test_random_shared_by_property('font-style', 'oblique random(10deg, 90deg)', 'oblique random(element-shared, 10deg, 90deg)');
test_random_shared_by_property('font-palette', 'palette-mix(in lch, --blue calc(90% * random(0, 1)), --yellow)',
'palette-mix(in lch, --blue calc(90% * random(element-shared, 0, 1)), --yellow)');
test_random_shared_by_property('font-palette', 'palette-mix(in lch, --blue random(10%, 90%, 10%), --yellow)',
'palette-mix(in lch, --blue random(element-shared, 10%, 90%, 10%), --yellow)');;
test_random_shared_by_property('animation-timeline', 'view(random(10px, 30px) random(30px, 60px))', 'view(random(element-shared, 10px, 30px) random(element-shared, 30px, 60px))');
test_random_shared_by_property('color', 'light-dark(rgb(random(10, 30) random(10, 60) random(10, 90)), rgb(random(30, 10) random(60, 10) random(90, 10)))',
`light-dark(rgb(random(element-shared, 10, 30) random(element-shared, 10, 60) random(element-shared, 10, 90)),
rgb(random(element-shared, 30, 10) random(element-shared, 60, 10) random(element-shared, 90, 10)))`);
// Test random value sharing
test(() => {
const holder = document.createElement('div');
document.body.appendChild(holder);
try {
const el = document.createElement('div');
el.className = 'randomNoIdentifier';
holder.appendChild(el);
const elComputedLeft = getComputedStyle(el)['left'];
var allSame = true;
var allHaveSameLeftAndRight = true;
for (i = 0; i < iterations; ++i) {
const other = document.createElement('div');
other.className = 'randomNoIdentifier';
holder.appendChild(other);
const otherComputedLeft = getComputedStyle(other)['left'];
if (elComputedLeft != otherComputedLeft) {
allSame = false;
}
const otherComputedRight = getComputedStyle(other)['right'];
if (elComputedLeft != otherComputedRight) {
allHaveSameLeftAndRight = false;
}
}
assert_false(allSame);
assert_false(allHaveSameLeftAndRight);
} finally {
document.body.removeChild(holder);
}
}, `Maximum random: 'random(a, b)'`);
test(() => {
const holder = document.createElement('div');
document.body.appendChild(holder);
try {
var allHaveSameMarginTopAndMarginLeft = true;
var allHaveSameMarginTopAndMarginBottom = true;
for (i = 0; i < iterations; ++i) {
const other = document.createElement('div');
other.className = 'randomNoIdentifier';
holder.appendChild(other);
const otherComputedMarginLeft = getComputedStyle(other)['margin-left'];
const otherComputedMarginTop = getComputedStyle(other)['margin-top'];
const otherComputedMarginBottom = getComputedStyle(other)['margin-bottom'];
if (otherComputedMarginLeft != otherComputedMarginTop) {
allHaveSameMarginTopAndMarginLeft = false;
}
if (otherComputedMarginBottom != otherComputedMarginTop) {
allHaveSameMarginTopAndMarginBottom = false;
}
}
assert_false(allHaveSameMarginTopAndMarginLeft);
assert_true(allHaveSameMarginTopAndMarginBottom);
} finally {
document.body.removeChild(holder);
}
}, `Maximum random - shorthand: random(a, b)`);
test(() => {
const holder = document.createElement('div');
document.body.appendChild(holder);
try {
for (let i = 0; i < iterations; ++i) {
const other1 = document.createElement('div');
other1.style.animationIterationCount = 'random(element-shared, 0, 100), random(element-shared, 0, 100)';
holder.appendChild(other1);
let [computed11, computed12] = getComputedStyle(other1)['animation-iteration-count'].split(', ');
const other2 = document.createElement('div');
other2.style.animationIterationCount = '300, random(element-shared, 0, 100)';
holder.appendChild(other2);
let [computed21, computed22] = getComputedStyle(other2)['animation-iteration-count'].split(', ');
assert_false(computed11 == computed12, "Random values for same property name but different value indexes should differ");
test_random_equals(computed11, computed22);
}
} finally {
document.body.removeChild(holder);
}
}, `Shared by property name and value index: random(element-shared, a, b)`);
test(() => {
const holder = document.createElement('div');
document.body.appendChild(holder);
try {
const el = document.createElement('div');
el.className = 'randomMatchElement';
holder.appendChild(el);
const elScale = getComputedStyle(el)['scale'];
var allHaveSameScaleXAndScaleY = true;
var allSame = true;
for (i = 0; i < iterations; ++i) {
const other = document.createElement('div');
other.className = 'randomMatchElement';
holder.appendChild(other);
const otherScale = getComputedStyle(other)['scale'];
if (elScale != otherScale) {
allSame = false;
}
let [scaleX, scaleY] = otherScale.split(' ');
if (scaleX != scaleY) {
allHaveSameScaleXAndScaleY = false;
}
}
assert_false(allHaveSameScaleXAndScaleY);
assert_true(allSame);
} finally {
document.body.removeChild(holder);
}
}, `Maximum random - list: random(a, b)`);
test(() => {
const holder = document.createElement('div');
document.body.appendChild(holder);
try {
for (i = 0; i < iterations; ++i) {
const el = document.createElement('div');
el.className = 'randomNoIdentifier';
holder.appendChild(el);
const elComputedLength1 = getComputedStyle(el).getPropertyValue('--random-length-1');
const elComputedLength2 = getComputedStyle(el).getPropertyValue('--random-length-2');
assert_false(elComputedLength1 == elComputedLength2,
"Different custom properties on the same element should not have equal values");
}
} finally {
document.body.removeChild(holder);
}
}, `Nested random inside custom property: 'random(a, b)'`);
test(() => {
const holder = document.createElement('div');
document.body.appendChild(holder);
try {
for (i = 0; i < iterations; ++i) {
const el = document.createElement('div');
el.className = 'randomNoIdentifier';
holder.appendChild(el);
const elComputedX = getComputedStyle(el).getPropertyValue('--x');
const elComputedY = getComputedStyle(el).getPropertyValue('--y');
assert_false(elComputedX == elComputedY,
"Different custom properties on the same element should not have equal values");
}
} finally {
document.body.removeChild(holder);
}
}, `Maximum random custom property: 'random(a, b)'`);
test(() => {
const holder = document.createElement('div');
document.body.appendChild(holder);
try {
for (i = 0; i < iterations; ++i) {
const el = document.createElement('div');
el.className = 'randomIdentifier';
holder.appendChild(el);
let elComputedWidth = getComputedStyle(el)['width'];
let elComputedHeight = getComputedStyle(el)['height'];
test_random_equals(elComputedWidth, elComputedHeight,
"width and height values on same element should be equal");
}
} finally {
document.body.removeChild(holder);
}
}, `Shared by name within an element: 'random(--identifier, a, b)'`);
test(() => {
const holder = document.createElement('div');
document.body.appendChild(holder);
try {
var allHaveSameMarginTopAndMarginLeft = true;
for (i = 0; i < iterations; ++i) {
const other = document.createElement('div');
other.className = 'randomIdentifier';
holder.appendChild(other);
const otherComputedMarginLeft = getComputedStyle(other)['margin-left'];
const otherComputedMarginTop = getComputedStyle(other)['margin-top'];
if (otherComputedMarginLeft != otherComputedMarginTop) {
allHaveSameMarginTopAndMarginLeft = false;
}
}
assert_true(allHaveSameMarginTopAndMarginLeft);
} finally {
document.body.removeChild(holder);
}
}, `Shared by name within an element - shorthand: random(--identifier, a, b))`);
test(() => {
const holder = document.createElement('div');
document.body.appendChild(holder);
try {
for (i = 0; i < iterations; ++i) {
const t1 = document.createElement('div');
t1.className = 'randomMatchElement';
holder.appendChild(t1);
const t2 = document.createElement('div');
t2.className = 'randomMatchElement';
holder.appendChild(t2);
let t1ComputedWidth = getComputedStyle(t1)['width'];
let t2ComputedWidth = getComputedStyle(t2)['width'];
test_random_equals(t1ComputedWidth, t2ComputedWidth,
"width values on different elements should be equal");
}
} finally {
document.body.removeChild(holder);
}
}, `Shared between elements within a property: random(element-shared, a, b)`);
test(() => {
const holder = document.createElement('div');
document.body.appendChild(holder);
var allSame = true;
try {
for (let i = 0; i < iterations; ++i) {
const t1 = document.createElement('div');
t1.style['color'] = 'color-mix(in srgb, rgb(0 random(0, 255) 0) 50%, rgb(random(0, 255) 0 0) 50%)';
holder.appendChild(t1);
let t1ComputedColor = getComputedStyle(t1)['color'];
let [r, g, b] = t1ComputedColor.replace('color(srgb ', '').split(' ');
if (r != g) {
allSame = false;
}
}
assert_false(allSame,
"random() values on different positions should not be equal");
} finally {
document.body.removeChild(holder);
}
}, `Shared between elements within a property, random inside color functions: random(element-shared, a, b)`);
test(() => {
const holder = document.createElement('div');
document.body.appendChild(holder);
try {
for (i = 0; i < iterations; ++i) {
const t1 = document.createElement('div');
t1.className = 'randomMatchElement';
holder.appendChild(t1);
const t2 = document.createElement('div');
t2.className = 'randomMatchElement';
holder.appendChild(t2);
let t1ComputedWidth = getComputedStyle(t1)['translate'];
let t2ComputedWidth = getComputedStyle(t2)['translate'];
test_random_equals(t1ComputedWidth, t2ComputedWidth,
"translate values with percentages on different elements should be equal");
}
} finally {
document.body.removeChild(holder);
}
}, `Shared between elements within a property, percentage values: random(element-shared, a, b)`);
test(() => {
const holder = document.createElement('div');
document.body.appendChild(holder);
try {
var allHaveSameMarginTopAndMarginLeft = true;
for (i = 0; i < iterations; ++i) {
const other = document.createElement('div');
other.className = 'randomMatchElement';
holder.appendChild(other);
const otherComputedMarginLeft = getComputedStyle(other)['margin-left'];
const otherComputedMarginTop = getComputedStyle(other)['margin-top'];
if (otherComputedMarginLeft != otherComputedMarginTop) {
allHaveSameMarginTopAndMarginLeft = false;
}
}
assert_true(allHaveSameMarginTopAndMarginLeft);
} finally {
document.body.removeChild(holder);
}
}, `Shared between elements within a property - shorthand: random(element-shared, a, b)`);
test(() => {
const holder = document.createElement('div');
document.body.appendChild(holder);
try {
for (i = 0; i < iterations; ++i) {
const t1 = document.createElement('div');
t1.className = 'randomMatchElementAndIdentifier';
holder.appendChild(t1);
const t2 = document.createElement('div');
t2.className = 'randomMatchElementAndIdentifier';
holder.appendChild(t2);
let t1ComputedWidth = getComputedStyle(t1)['width'];
let t2ComputedHeight = getComputedStyle(t2)['height'];
test_random_equals(t1ComputedWidth, t2ComputedHeight,
"width and height values on different elements should be equal");
}
} finally {
document.body.removeChild(holder);
}
}, `Shared globally: random(--identifier element-shared, a, b)`);
test(() => {
const holder = document.createElement('div');
document.body.appendChild(holder);
try {
var allHaveSameMarginTopAndMarginLeft = true;
for (i = 0; i < iterations; ++i) {
const other = document.createElement('div');
other.className = 'randomMatchElementAndIdentifier';
holder.appendChild(other);
const otherComputedMarginLeft = getComputedStyle(other)['margin-left'];
const otherComputedMarginTop = getComputedStyle(other)['margin-top'];
if (otherComputedMarginLeft != otherComputedMarginTop) {
allHaveSameMarginTopAndMarginLeft = false;
}
}
assert_true(allHaveSameMarginTopAndMarginLeft);
} finally {
document.body.removeChild(holder);
}
}, `Shared globally - shorthand: random(element-shared, a, b)`);
test(() => {
const holder = document.createElement('div');
document.body.appendChild(holder);
try {
for (i = 0; i < iterations; ++i) {
const t1 = document.createElement('div');
t1.className = 'randomFixed';
holder.appendChild(t1);
let t1ComputedWidth = getComputedStyle(t1)['width'];
test_random_equals(t1ComputedWidth, "55px", "Random value with fixed should be 55px");
}
} finally {
document.body.removeChild(holder);
}
}, `Fixed: random(fixed <number>, a, b)`);
// Test random value sharing
test(() => {
const holder = document.createElement('div');
document.body.appendChild(holder);
try {
const el = document.createElement('div');
el.className = 'randomIdentifier';
holder.appendChild(el);
const elComputedHeight = getComputedStyle(el)['height'];
var allSame = true;
for (i = 0; i < iterations; ++i) {
const other = document.createElement('div');
other.className = 'randomIdentifier';
holder.appendChild(other);
const otherComputedHeight = getComputedStyle(other)['height'];
if (elComputedHeight != otherComputedHeight) {
allSame = false;
}
}
assert_false(allSame);
} finally {
document.body.removeChild(holder);
}
}, `Different between elements with same identifier random(--identifier, a, b)`);
test(() => {
const holder = document.createElement('div');
document.body.appendChild(holder);
try {
const el = document.createElement('div');
el.className = 'randomNoIdentifier';
holder.appendChild(el);
const computedValue = getComputedStyle(el)['--random-in-initial'];
test_random_equals(computedValue, undefined);
} finally {
document.body.removeChild(holder);
}
}, `random() values should not be allowed as initial values in @property`);
</script>