input-preprocessing.html

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This WPT test may be referenced by the following Test IDs:
- /css/css-syntax/input-preprocessing.html - WPT Dashboard Interop Dashboard

<!doctype html>

<title>Input Preprocessing</title>

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

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

<style>

foo { color: blue; }

</style>

<meta name="author" title="Tab Atkins-Bittner">

<link rel=help href="https://drafts.csswg.org/css-syntax/#input-preprocessing">

<script>

function roundtripIdent(str) {

    const rule = document.styleSheets[0].cssRules[0];

    rule.selectorText = "original-ident";

    rule.selectorText = str;

    // Check for parse error.

    if(rule.selectorText == "original-ident") return "parse error";

    return rule.selectorText;

function testParsing(input, expected) {

    test(()=>{

        assert_equals(roundtripIdent(input), expected);

    }, `"${input}" becomes "${expected}"`);

/* Can't figure out how to test the newline normalization... */

/* NULL becomes FFFD */

testParsing("foo\x00", "foo\ufffd");

testParsing("f\x00oo", "f\ufffdoo");

testParsing("\x00foo", "\ufffdfoo");

testParsing("\x00", "\ufffd");

testParsing("\x00\x00\x00", "\ufffd\ufffd\ufffd");

/* surrogates become FFFD */

testParsing("foo\ud800", "foo\ufffd");

testParsing("f\ud800oo", "f\ufffdoo");

testParsing("\ud800foo", "\ufffdfoo");

testParsing("\ud800", "\ufffd");

testParsing("\ud800\ud800\ud800", "\ufffd\ufffd\ufffd");

</script>