feat(i18n): add language switcher

2026-06-11 16:16:06 +02:00
parent 18a192a069
commit c3cf4182ad
11 changed files with 319 additions and 2 deletions
@@ -0,0 +1,50 @@
+import { beforeEach, describe, expect, it, vi } from "vitest"
+
+import { LOCALE_COOKIE_MAX_AGE_SECONDS } from "@/i18n/locales"
+
+const headersMocks = vi.hoisted(() => ({
+  cookieSet: vi.fn(),
+  cookies: vi.fn(),
+}))
+
+vi.mock("next/headers", () => ({
+  cookies: headersMocks.cookies,
+}))
+
+import { setLocaleAction } from "@/actions/i18n.actions"
+
+describe("setLocaleAction", () => {
+  beforeEach(() => {
+    headersMocks.cookieSet.mockReset()
+    headersMocks.cookies.mockReset()
+    headersMocks.cookies.mockResolvedValue({
+      set: headersMocks.cookieSet,
+    })
+  })
+
+  it("writes a validated supported locale to the locale cookie", async () => {
+    const result = await setLocaleAction("es")
+
+    expect(result).toEqual({ success: true, locale: "es" })
+    expect(headersMocks.cookies).toHaveBeenCalledOnce()
+    expect(headersMocks.cookieSet).toHaveBeenCalledWith(
+      "stock-manager-locale",
+      "es",
+      {
+        path: "/",
+        sameSite: "lax",
+        maxAge: LOCALE_COOKIE_MAX_AGE_SECONDS,
+        httpOnly: true,
+        secure: false,
+      },
+    )
+  })
+
+  it("rejects unsupported locales without writing a cookie", async () => {
+    const result = await setLocaleAction("fr")
+
+    expect(result).toEqual({ success: false, error: "UNSUPPORTED_LOCALE" })
+    expect(headersMocks.cookies).not.toHaveBeenCalled()
+    expect(headersMocks.cookieSet).not.toHaveBeenCalled()
+  })
+})