serialize-escape-identifiers.html

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /css/css-syntax/serialize-escape-identifiers.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<html>

  <head>

    <title>Properly escape CSS identifiers</title>

    <script src="/resources/testharness.js"></script>

    <script src="/resources/testharnessreport.js"></script>

    <link rel="help" href="https://crbug.com/343000522">

    <style id="sheet">

      @import 'abc' layer(\{\});

      @counter-style abc\{\}oops {}

      @font-feature-values abc\{\}oops {}

      @font-palette-values --abc\{\}oops {}

      @keyframes abc\{\}oops {}

      @layer abc\;oops\!;

    </style>

  </head>

  <body>

  <script>

    test(()=>{

      const rules = Array.from(document.styleSheets[0].cssRules);

      const text = rules.map(r => r.cssText).join('\n');

      sheet.innerText = text;

      const new_rules = Array.from(document.styleSheets[0].cssRules);

      const new_text = new_rules.map(r => r.cssText).join('\n');

      assert_equals(new_text, text);

    }, 'Rules must be the same after serialization round-trip, even with escaped characters');

  </script>