test_constructable_stylesheets_chrome_only_rules.html

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<!DOCTYPE HTML>

<meta charset="utf-8">

<title>Test for chrome-only rules in constructable stylesheets</title>

<script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>

<script>

  add_task(async function chrome_rules_constructable_stylesheets() {

    let sheet = new CSSStyleSheet();

    sheet.replaceSync(".foo { -moz-default-appearance: none }");

    is(sheet.cssRules[0].style.length, 1, "Should parse chrome-only property in chrome document");

});

</script>