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<!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>
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