1da975b771
This allows failing early for reftests that would otherwise timeout waiting for a screenshot. It assumes that replacing the body with an error message and taking a screenshot will never match the reference. Differential Revision: https://phabricator.services.mozilla.com/D162553
40 lines
1.1 KiB
JavaScript
40 lines
1.1 KiB
JavaScript
/**
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* Remove the `reftest-wait` class on the document element.
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* The reftest runner will wait with taking a screenshot while
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* this class is present.
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*
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* See https://web-platform-tests.org/writing-tests/reftests.html#controlling-when-comparison-occurs
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*/
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function takeScreenshot() {
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document.documentElement.classList.remove("reftest-wait");
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}
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/**
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* Call `takeScreenshot()` after a delay of at least |timeout| milliseconds.
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* @param {number} timeout - milliseconds
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*/
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function takeScreenshotDelayed(timeout) {
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setTimeout(function() {
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takeScreenshot();
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}, timeout);
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}
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/**
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* Ensure that a precondition is met before waiting for a screenshot.
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* @param {bool} condition - Fail the test if this evaluates to false
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* @param {string} msg - Error message to write to the screenshot
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*/
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function failIfNot(condition, msg) {
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const fail = () => {
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(document.body || document.documentElement).textContent = `Precondition Failed: ${msg}`;
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takeScreenshot();
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};
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if (!condition) {
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if (document.readyState == "interactive") {
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fail();
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} else {
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document.addEventListener("DOMContentLoaded", fail, false);
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}
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}
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}
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