Karl Dubost
2fa44a9672
Automatic update from web-platform-tests WebKit export of https://bugs.webkit.org/show_bug.cgi?id=262146 (#59317) -- wpt-commits: d461821ac71b97edfa785db4c309414e8ec31377 wpt-pr: 59317
85 lines
3.8 KiB
HTML
85 lines
3.8 KiB
HTML
<!DOCTYPE html>
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<title>systemLanguage attribute is parsed as comma-separated tokens</title>
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<link rel="help" href="https://w3c.github.io/svgwg/svg2-draft/struct.html#ConditionalProcessingSystemLanguageAttribute">
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<link rel="help" href="https://html.spec.whatwg.org/multipage/common-microsyntaxes.html#set-of-comma-separated-tokens">
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<meta name="assert" content="The systemLanguage attribute value is a set of comma-separated tokens per SVG2. Each token is trimmed of surrounding ASCII whitespace.">
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<script>
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function parsesAs(input, expected, description) {
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test(() => {
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const el = document.createElementNS("http://www.w3.org/2000/svg", "text");
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el.setAttribute("systemLanguage", input);
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const list = el.systemLanguage;
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assert_equals(list.length, expected.length, "token count");
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for (let i = 0; i < expected.length; i++)
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assert_equals(list.getItem(i), expected[i], `token ${i}`);
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}, description);
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}
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// SVG2: "The value is a set of comma-separated tokens, each of which must be
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// a Language-Tag value, as defined in BCP 47."
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//
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// HTML: "A set of comma-separated tokens is a string containing zero or more
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// tokens each separated from the next by a single U+002C COMMA character (,),
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// where tokens consist of any string of zero or more characters, neither
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// beginning nor ending with ASCII whitespace, nor containing any U+002C COMMA
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// characters (,), and optionally surrounded by ASCII whitespace."
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parsesAs("en,fr,de", ["en", "fr", "de"],
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"Comma-separated tokens are split into individual items");
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parsesAs("en, fr, de", ["en", "fr", "de"],
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"Whitespace after comma is stripped");
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parsesAs("en ,fr ,de", ["en", "fr", "de"],
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"Whitespace before comma is stripped");
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parsesAs("en , fr , de", ["en", "fr", "de"],
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"Whitespace around commas is stripped");
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parsesAs(" en, fr ", ["en", "fr"],
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"Leading and trailing whitespace on the value is stripped");
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parsesAs(" \t\nen, fr\t\n ", ["en", "fr"],
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"Tabs and newlines as leading/trailing whitespace are stripped");
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parsesAs("en", ["en"],
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"Single token without commas");
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// "each of which must be a Language-Tag value, as defined in BCP 47"
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// BCP 47 tags use hyphens for subtags (e.g. "en-US", "zh-Hans").
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// Hyphens are not separators — only commas are.
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parsesAs("en-US, zh-Hans, pt-BR", ["en-US", "zh-Hans", "pt-BR"],
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"BCP 47 subtags are preserved within tokens");
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// Edge cases: the parser does not validate token content.
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// Invalid BCP 47 tags are stored as-is. They simply won't match
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// any user language, so the element won't render.
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// Double comma — per the HTML comma-separated token spec, the empty
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// string between consecutive commas is a valid token.
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// https://html.spec.whatwg.org/multipage/common-microsyntaxes.html#set-of-comma-separated-tokens
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// Example from spec: " a ,b,,d d " → ["a", "b", "", "d d"]
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parsesAs("en,,fr", ["en", "", "fr"],
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"Double comma produces an empty token between the two commas");
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// "zero or more tokens" — an empty string yields an empty list.
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// SVG2: "If a null string or empty string value is given to attribute
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// 'systemLanguage', the attribute evaluates to 'false'."
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parsesAs("", [""],
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"Empty string results in a single empty token");
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// A lone comma separates two empty tokens per the HTML spec.
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parsesAs(",", ["", ""],
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"A single comma separates two empty tokens");
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// Numeric strings are not valid BCP 47 tags but are stored as tokens.
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parsesAs("123, 456", ["123", "456"],
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"Numeric tokens are parsed without validation");
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// Arbitrary invalid strings are stored as tokens without validation.
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parsesAs("not-a-lang, ???, @#$", ["not-a-lang", "???", "@#$"],
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"Invalid language tags are stored as tokens without validation");
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</script>
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