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function runUAStyleTests(props) {
const refs = document.getElementById('refs');
for (const el of document.querySelectorAll('#tests > *')) {
const clone = fakeClone(el);
refs.append(clone);
}
const testsContainer = document.getElementById('tests');
const testEls = document.querySelectorAll('#tests *');
const refEls = document.querySelectorAll('#refs *');
for (let i = 0; i < testEls.length; ++i) {
const testEl = testEls[i];
if (testEl.hasAttribute('data-skip')) {
continue;
}
const refEl = refEls[i];
const testStyle = getComputedStyle(testEl);
const refStyle = getComputedStyle(refEl);
for (const prop of props) {
// Don't test display for some elements.
if (prop === 'display' &&
(testEl.localName === 'optgroup' ||
testEl.localName === 'option' ||
testEl.localName === 'marquee')
) {
continue;
}
if (prop === 'overflow' && testEl.localName === 'select') {
continue;
}
test(() => {
assert_equals(testStyle.getPropertyValue(prop), refStyle.getPropertyValue(prop));
}, `${testNameContext(testEl)} - ${prop}`);
}
}
function fakeClone(el) {
const clone = document.createElementNS('urn:not-html', el.localName);
for (const att of el.attributes) {
clone.setAttributeNS(att.namespaceURI, att.name, att.value);
}
// deep clone
for (const child of el.children) {
clone.append(fakeClone(child));
}
return clone;
}
function testNameContext(el) {
const outerHTML = el.outerHTML;
const startTags = outerHTML.substring(0, outerHTML.indexOf('</')) || outerHTML;
let ancestors = [];
let current = el.parentNode;
while (current != testsContainer) {
ancestors.unshift(`<${current.localName}${contextAttrs(current.attributes)}>`);
current = current.parentNode;
}
return startTags + (ancestors.length ? ` (in ${ancestors.join('')})` : '');
}
function contextAttrs(attributes) {
let rv = "";
for (let i = 0; i < attributes.length; ++i) {
if (attributes[i].name === 'data-skip') {
continue;
}
rv += ` ${attributes[i].name}="${attributes[i].value}"`;
}
return rv;
}
}