fix(birthplace): guarantee strict country and city independence with test suite

src/components/Componentes/question-birthplace.test.ts

@@ -0,0 +1,70 @@
+import { describe, expect, it } from "vitest";
+import { parseValue } from "./question-birthplace";
+
+describe("QuestionBirthplace parseValue", () => {
+  it("parses empty and null values safely", () => {
+    expect(parseValue(null)).toEqual({ country: "", city: "" });
+    expect(parseValue(undefined)).toEqual({ country: "", city: "" });
+    expect(parseValue("")).toEqual({ country: "", city: "" });
+  });
+
+  it("parses structured objects", () => {
+    expect(parseValue({ country: "Iran", city: "Tehran" })).toEqual({
+      country: "Iran",
+      city: "Tehran",
+    });
+  });
+
+  it("parses standard 'City, Country' strings", () => {
+    expect(parseValue("Tehran, Iran")).toEqual({
+      city: "Tehran",
+      country: "Iran",
+    });
+    expect(parseValue("شیراز, ایران")).toEqual({
+      city: "شیراز",
+      country: "ایران",
+    });
+  });
+
+  it("never swaps city and country even when city equals country name", () => {
+    // City typed as 'albania' and country selected as 'Afghanistan'
+    expect(parseValue("albania, Afghanistan")).toEqual({
+      city: "albania",
+      country: "Afghanistan",
+    });
+
+    // City typed as 'Albania' and country selected as 'Albania'
+    expect(parseValue("Albania, Albania")).toEqual({
+      city: "Albania",
+      country: "Albania",
+    });
+
+    // City typed as 'Georgia' and country selected as 'United States (US)'
+    expect(parseValue("Georgia, United States (US)")).toEqual({
+      city: "Georgia",
+      country: "United States (US)",
+    });
+  });
+
+  it("parses single country string", () => {
+    expect(parseValue("Iran")).toEqual({
+      country: "Iran",
+      city: "",
+    });
+    expect(parseValue("ایران")).toEqual({
+      country: "ایران",
+      city: "",
+    });
+    expect(parseValue("Afghanistan")).toEqual({
+      country: "Afghanistan",
+      city: "",
+    });
+  });
+
+  it("parses single custom city string without matching country", () => {
+    expect(parseValue("Rey")).toEqual({
+      country: "",
+      city: "Rey",
+    });
+  });
+});

src/components/Componentes/question-birthplace.tsx

@@ -24,7 +24,7 @@ type BirthplaceValue = {
   city?: string;
 };
 
-function parseValue(rawValue: unknown): { country: string; city: string } {
+export function parseValue(rawValue: unknown): { country: string; city: string } {
   if (!rawValue) return { country: "", city: "" };
 
   if (typeof rawValue === "object" && rawValue !== null) {
@@ -105,10 +105,11 @@ export function QuestionBirthplace({
   const storedRegion = isResidence ? getStoredUserGeoRegion() : null;
 
   const initial = parseValue(rawValue);
-  const localizedInitialCountry = resolveCountryName(
-    initial.country || storedRegion?.country,
-    locale,
-  );
+  const localizedInitialCountry =
+    resolveCountryName(initial.country || storedRegion?.country, locale) ||
+    initial.country ||
+    storedRegion?.country ||
+    "";
   const initialCity = initial.city || storedRegion?.city || "";
   const initialLoc =
     localizedInitialCountry || initialCity
@@ -193,7 +194,7 @@ export function QuestionBirthplace({
     // If there is already a saved answer and we are not forcing, display it
     if (rawValue && !force) {
       const parsed = parseValue(rawValue);
-      const cName = resolveCountryName(parsed.country, locale);
+      const cName = resolveCountryName(parsed.country, locale) || parsed.country;
       if (cName || parsed.city) {
         const loc = [parsed.city, cName].filter(Boolean).join(", ");
         if (cName) setSelectedCountry(cName);
@@ -254,12 +255,16 @@ export function QuestionBirthplace({
     }
     setMode("manual");
     const parsed = parseValue(rawValue);
-    const resolvedC = resolveCountryName(selectedCountry || parsed.country, locale);
-    const country = resolvedC || selectedCountry || parsed.country;
+    const resolvedC =
+      resolveCountryName(selectedCountry || parsed.country, locale) ||
+      selectedCountry ||
+      parsed.country;
+    const country = resolvedC;
     const city = cityInput || parsed.city;
     setSelectedCountry(country);
     setCityInput(city);
     updateAnswers(country, city);
+    setDetectedLocation([city, country].filter(Boolean).join(", "));
   };
 
   // Synchronize state ONLY if rawValue changes externally (e.g. draft fetch or reset)
@@ -268,11 +273,11 @@ export function QuestionBirthplace({
       return;
     }
     const updated = parseValue(rawValue);
-    const resolvedC = resolveCountryName(updated.country, locale);
-    if (resolvedC && resolvedC !== selectedCountry) {
+    const resolvedC = resolveCountryName(updated.country, locale) || updated.country;
+    if (resolvedC !== selectedCountry) {
       setSelectedCountry(resolvedC);
     }
-    if (updated.city && updated.city.trim() !== cityInput.trim()) {
+    if (updated.city !== cityInput) {
       setCityInput(updated.city);
     }
     if (resolvedC || updated.city) {