pluriwave/test/pantallas/pantalla_paises_test.dart

import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:pluriwave/estado/estado_busqueda.dart';
import 'package:pluriwave/l10n/gen/app_localizations.dart';
import 'package:pluriwave/modelos/pais_radio.dart';
import 'package:pluriwave/pantallas/pantalla_paises.dart';
import 'package:pluriwave/widgets/pluri_push_scaffold.dart';
import 'package:provider/provider.dart';

import '../helpers/fakes.dart';

/// WU7, `station-discovery-browse` spec — "Países Browser Over the Verified
/// Countries Contract": "Tus idiomas" shortlist + the full alphabetical
/// list, each entry showing its station count. `stationcount`'s "arrives as
/// a JSON string" edge case is covered at its own layer boundary in
/// `test/modelos/pais_radio_test.dart` — `FakeServicioRadio.obtenerPaises()`
/// returns already-parsed `PaisRadio` instances here, so this file tests
/// rendering only, not JSON parsing.
void main() {
  Widget buildScreen(EstadoBusqueda estado) {
    return ChangeNotifierProvider<EstadoBusqueda>.value(
      value: estado,
      child: MaterialApp(
        locale: const Locale('es'),
        localizationsDelegates: AppLocalizations.localizationsDelegates,
        supportedLocales: AppLocalizations.supportedLocales,
        home: const PantallaPaises(),
      ),
    );
  }

  Future<void> pumpEstable(WidgetTester tester) async {
    await tester.pump();
    await tester.pumpAndSettle();
  }

  testWidgets(
    'renders inside a PluriPushScaffold; muestra "Tus idiomas" y la lista '
    'alfabética completa con el conteo de cada país',
    (tester) async {
      final estado = EstadoBusqueda(
        radio: FakeServicioRadio(
          paises: const [
            PaisRadio(nombre: 'Spain', codigoIso: 'ES', numeroEmisoras: 482),
            PaisRadio(
              nombre: 'Argentina',
              codigoIso: 'AR',
              numeroEmisoras: 120,
            ),
            PaisRadio(nombre: 'France', codigoIso: 'FR', numeroEmisoras: 75),
          ],
        ),
      );
      addTearDown(estado.dispose);

      await tester.pumpWidget(buildScreen(estado));
      await pumpEstable(tester);

      expect(find.byType(PluriPushScaffold), findsOneWidget);

      final l10n = AppLocalizations.of(
        tester.element(find.byType(PantallaPaises)),
      );
      expect(find.text(l10n.countriesYourLanguagesTitle), findsOneWidget);
      expect(find.text(l10n.countriesAllTitle), findsOneWidget);

      // Full alphabetical list: all 3 fetched countries render.
      expect(find.text('Argentina'), findsOneWidget);
      expect(find.text('France'), findsOneWidget);
      // 'Spain' renders twice: "Tus idiomas" (locale es -> representative
      // country ES) AND the full list below.
      expect(find.text('Spain'), findsWidgets);

      // Each entry's parsed `stationcount` renders via the existing
      // `stationsCount` string — 482 came from the API as a STRING
      // (`PaisRadio.fromApi`'s job, verified separately) and must display
      // as a plain number here, never throwing a cast error.
      expect(find.text(l10n.stationsCount(482)), findsWidgets);
      expect(find.text(l10n.stationsCount(120)), findsOneWidget);
      expect(find.text(l10n.stationsCount(75)), findsOneWidget);
    },
  );

  testWidgets(
    'cargarPaises no se re-dispara si ya hay datos en caché al reconstruir',
    (tester) async {
      final radio = FakeServicioRadio(
        paises: const [
          PaisRadio(nombre: 'Italy', codigoIso: 'IT', numeroEmisoras: 30),
        ],
      );
      final estado = EstadoBusqueda(radio: radio);
      addTearDown(estado.dispose);

      await tester.pumpWidget(buildScreen(estado));
      await pumpEstable(tester);
      expect(radio.obtenerPaisesCalls, 1);

      // Re-entering the screen (a fresh State, same EstadoBusqueda instance)
      // must not refetch — the in-memory cache guard lives on EstadoBusqueda,
      // not on the widget.
      await tester.pumpWidget(const SizedBox.shrink());
      await pumpEstable(tester);
      await tester.pumpWidget(buildScreen(estado));
      await pumpEstable(tester);

      expect(radio.obtenerPaisesCalls, 1);
    },
  );
}