mirror of https://github.com/tc39/test262.git
51 lines
1.9 KiB
JavaScript
51 lines
1.9 KiB
JavaScript
// Copyright 2020 Jeff Walden, Mozilla Corporation. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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esid: sec-isstructurallyvalidlanguagetag
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description: >
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Verifies that just as duplicate variants in a tag ("en-emodeng-emodeng") make
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the tag structurally invalid, so too do duplicate variants in the tlang
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component of an otherwise structurally valid tag ("de-t-emodeng-emodeng"),
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make it structurally invalid.
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info: |
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if a `transformed_extensions` component that contains a `tlang` component is
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present, then
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the `tlang` component contains no duplicate `unicode_variant_subtag`
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subtags.
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features: [Intl.Locale]
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---*/
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assert.sameValue(typeof Intl.Locale, "function");
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function mustReject(tag) {
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assert.throws(RangeError, () => {
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// Direct matches are rejected.
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new Intl.Locale(tag);
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}, `tag "${tag}" must be considered structurally invalid`);
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}
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// BCP47 since forever, and ECMA-402 as consequence, do not consider tags that
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// contain duplicate variants to be structurally valid. This restriction also
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// applies within the |tlang| component (indicating the source locale from which
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// relevant content was transformed) of a broader language tag.
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// Direct matches are rejected.
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mustReject("de-t-en-emodeng-emodeng");
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// Case-insensitive matches are also rejected.
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mustReject("de-t-en-Emodeng-emodeng");
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// ...and in either order.
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mustReject("de-t-en-emodeng-Emodeng");
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// Repeat the above tests with additional variants interspersed at each point
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// for completeness.
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mustReject("de-t-en-variant-emodeng-emodeng");
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mustReject("de-t-en-variant-Emodeng-emodeng");
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mustReject("de-t-en-variant-emodeng-Emodeng");
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mustReject("de-t-en-emodeng-variant-emodeng");
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mustReject("de-t-en-Emodeng-variant-emodeng");
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mustReject("de-t-en-emodeng-variant-Emodeng");
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mustReject("de-t-en-emodeng-emodeng-variant");
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mustReject("de-t-en-Emodeng-emodeng-variant");
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mustReject("de-t-en-emodeng-Emodeng-variant");
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