69 lines
2.5 KiB
TypeScript
69 lines
2.5 KiB
TypeScript
/**
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* Helper for spinning up a real `@suaveplan/i18n` `I18nInstance` plus
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* its bundled translations under a fresh `I18nInstance` per test. No
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* mocks — every consumer of an i18n instance in the test suite uses
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* this helper so the wiring matches production exactly.
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*
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* The bundled `react-ui` JSON files ship FLAT keys
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* (`"react-ui.button.iconOnly.fallback": "Action"`). The catalog's `t()`
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* walks dot-separated paths, so we nest the flat bag into a deep
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* record (`{ react-ui: { button: { iconOnly: { fallback: "Action" } } } }`)
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* before merging into the catalog. This mirrors the chassis
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* `ReactUiProvider`'s `nestFlatKeys` step exactly so production and
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* tests resolve keys via the same pathway.
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*/
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import { createI18n, type I18nInstance } from "@suaveplan/i18n/plugin";
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import { reactUiBundles } from "../../src/locales/index.js";
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export interface CreateTestI18nOptions {
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readonly locale?: "en-GB" | "zh-CN" | "ar-AE" | "cy-GB" | "ru-RU";
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}
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type NestedTranslationRecord = {
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[key: string]: string | NestedTranslationRecord;
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};
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function nestFlatKeys(bag: Record<string, string>): NestedTranslationRecord {
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const out: NestedTranslationRecord = {};
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for (const [flatKey, value] of Object.entries(bag)) {
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const parts = flatKey.split(".");
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let cursor: NestedTranslationRecord = out;
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for (let i = 0; i < parts.length - 1; i += 1) {
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const seg = parts[i] as string;
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const existing = cursor[seg];
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if (
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typeof existing !== "object" ||
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existing === null ||
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Array.isArray(existing)
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) {
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cursor[seg] = {};
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}
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cursor = cursor[seg] as NestedTranslationRecord;
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}
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cursor[parts[parts.length - 1] as string] = value;
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}
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return out;
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}
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/**
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* Build an `I18nInstance` seeded with the chassis locale bundles.
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* Useful for tests that need a Provider but want deterministic
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* translations.
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*/
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export async function createTestI18n(
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options: CreateTestI18nOptions = {}
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): Promise<I18nInstance> {
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const locale = options.locale ?? "en-GB";
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const i18n = createI18n({
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defaultLocale: locale,
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fallbackLocale: "en-GB",
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});
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for (const code of ["en-GB", "zh-CN", "ar-AE", "cy-GB", "ru-RU"] as const) {
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const bundle = await reactUiBundles[code]();
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const nested = nestFlatKeys(bundle as Record<string, string>);
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i18n.catalog.mergeMessages(code, nested as Record<string, unknown>);
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}
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return i18n;
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}
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