Files
stock-manager/tests/unit/i18n/locales.test.ts
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TypeScript

import { describe, expect, it } from "vitest"
import {
DEFAULT_LOCALE_ENV_VAR,
FALLBACK_LOCALE,
isLocale,
LOCALE_COOKIE_NAME,
resolveDefaultLocale,
resolveLocale,
SUPPORTED_LOCALES,
} from "@/i18n/locales"
describe("i18n locales", () => {
it("defines exactly English and Spanish with an env-configured default", () => {
expect(SUPPORTED_LOCALES).toEqual(["en", "es"])
expect(FALLBACK_LOCALE).toBe("en")
expect(DEFAULT_LOCALE_ENV_VAR).toBe("STOCK_MANAGER_DEFAULT_LOCALE")
expect(LOCALE_COOKIE_NAME).toBe("stock-manager-locale")
})
it("accepts only exact supported locale codes", () => {
expect(isLocale("en")).toBe(true)
expect(isLocale("es")).toBe(true)
for (const value of ["", "ES", "es-MX", "fr", undefined, null, 1]) {
expect(isLocale(value)).toBe(false)
}
})
it("resolves valid locale cookie values and falls back to the configured default for invalid values", () => {
expect(resolveLocale("es", "en")).toBe("es")
expect(resolveLocale("en", "es")).toBe("en")
for (const value of ["", "ES", "es-MX", "fr", undefined, null, 1]) {
expect(resolveLocale(value, "es")).toBe("es")
expect(resolveLocale(value, "en")).toBe("en")
}
})
it("resolves the configured default locale from env-like values with a safe English fallback", () => {
expect(resolveDefaultLocale("es")).toBe("es")
expect(resolveDefaultLocale("en")).toBe("en")
for (const value of ["", "ES", "es-MX", "fr", undefined, null, 1]) {
expect(resolveDefaultLocale(value)).toBe("en")
}
})
})