43 lines
1.6 KiB
JavaScript
43 lines
1.6 KiB
JavaScript
describe("correct behavior", () => {
|
|
test("length is 1", () => {
|
|
expect(Intl.Segmenter.supportedLocalesOf).toHaveLength(1);
|
|
});
|
|
|
|
test("basic functionality", () => {
|
|
// prettier-ignore
|
|
const values = [
|
|
[[], []],
|
|
[undefined, []],
|
|
["en", ["en"]],
|
|
[new Intl.Locale("en"), ["en"]],
|
|
[["en"], ["en"]],
|
|
[["en", "en-gb", "en-us"], ["en", "en-GB", "en-US"]],
|
|
[["en", "de", "fr"], ["en", "de", "fr"]],
|
|
[["en-foobar"], ["en-foobar"]],
|
|
[["en-foobar-u-abc"], ["en-foobar-u-abc"]],
|
|
[["aa", "zz"], []],
|
|
[["en", "aa", "zz"], ["en"]],
|
|
];
|
|
for (const [input, expected] of values) {
|
|
expect(Intl.Segmenter.supportedLocalesOf(input)).toEqual(expected);
|
|
// "best fit" (implementation defined) just uses the same implementation as "lookup" at the moment
|
|
expect(Intl.Segmenter.supportedLocalesOf(input, { localeMatcher: "best fit" })).toEqual(
|
|
Intl.Segmenter.supportedLocalesOf(input, { localeMatcher: "lookup" })
|
|
);
|
|
}
|
|
});
|
|
});
|
|
|
|
describe("errors", () => {
|
|
test("invalid value for localeMatcher option", () => {
|
|
expect(() => {
|
|
Intl.Segmenter.supportedLocalesOf([], { localeMatcher: "foo" });
|
|
}).toThrowWithMessage(RangeError, "foo is not a valid value for option localeMatcher");
|
|
});
|
|
|
|
test("invalid language tag", () => {
|
|
expect(() => {
|
|
Intl.Segmenter.supportedLocalesOf(["aaaaaaaaa"]);
|
|
}).toThrowWithMessage(RangeError, "aaaaaaaaa is not a structurally valid language tag");
|
|
});
|
|
});
|