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CSSStyleSheet-constructable-replace-on-regular-sheet.html
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<!doctype html>
<title>replace / replaceSync on non-constructed stylesheet</title>
<link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io">
<link rel="help" href="https://wicg.github.io/construct-stylesheets/">
<script src = '/resources/testharness.js'></script>
<script src = '/resources/testharnessreport.js'></script>
<style id="style">
@import url("support/constructable-import.css");
:root { background-color: lime }
</style>
<script>
promise_test(async () => {
await new Promise(resolve => window.addEventListener("load", resolve));
assert_equals(getComputedStyle(document.documentElement).backgroundColor, "rgb(0, 255, 0)", "precondition")
let sheet = document.styleSheets[0];
let childSheet = sheet.cssRules[0].styleSheet;
assert_throws_dom("NotAllowedError", () => sheet.replaceSync(":root { background-color: red }"), "replaceSync on non-constructed sheet should throw");
assert_throws_dom("NotAllowedError", () => childSheet.replaceSync(":root { background-color: red }"), "replaceSync on non-constructed sheet should throw");
assert_equals(getComputedStyle(document.documentElement).backgroundColor, "rgb(0, 255, 0)", "old sheet should still apply after replace");
}, "CSSStyleSheet.replaceSync throws NotAllowedError for non-constructed sheets")
promise_test(async function(t) {
assert_equals(getComputedStyle(document.documentElement).backgroundColor, "rgb(0, 255, 0)", "precondition")
let sheet = document.styleSheets[0];
let childSheet = sheet.cssRules[0].styleSheet;
await promise_rejects_dom(t, "NotAllowedError", sheet.replace(":root { background-color: red }"), "replace on non-constructed sheet should return a rejected promise");
await promise_rejects_dom(t, "NotAllowedError", childSheet.replace(":root { background-color: red }"), "replace on non-constructed sheet should return a rejected promise");
assert_equals(getComputedStyle(document.documentElement).backgroundColor, "rgb(0, 255, 0)", "old sheet should still apply after replace");
}, "CSSStyleSheet.replace returns a rejected promise for non-constructed sheets")
promise_test(async function(t) {
assert_equals(getComputedStyle(document.documentElement).backgroundColor, "rgb(0, 255, 0)", "precondition")
let sheet = document.styleSheets[0];
let childSheet = sheet.cssRules[0].styleSheet;
style.remove() // sheet's associated document becomes null.
await promise_rejects_dom(t, "NotAllowedError", sheet.replace(":root { background-color: red }"), "replace on non-constructed sheet should return a rejected promise");
await promise_rejects_dom(t, "NotAllowedError", childSheet.replace(":root { background-color: red }"), "replace on non-constructed sheet should return a rejected promise");
assert_equals(getComputedStyle(document.documentElement).backgroundColor, "rgba(0, 0, 0, 0)", "old sheet was removed, so the default color should apply");
}, "CSSStyleSheet.replace returns a rejected promise for non-constructed sheets that have no associated document")
</script>