polygon_update_test.dart

// Copyright 2018 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import 'package:apple_maps_flutter/apple_maps_flutter.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter/services.dart';
import 'package:flutter/widgets.dart';
import 'package:flutter_test/flutter_test.dart';

import 'fake_maps_controllers.dart';

Set<Polygon> _toSet({Polygon? p1, Polygon? p2, Polygon? p3}) {
  final Set<Polygon> res = Set<Polygon>.identity();
  if (p1 != null) {
    res.add(p1);
  }
  if (p2 != null) {
    res.add(p2);
  }
  if (p3 != null) {
    res.add(p3);
  }
  return res;
}

Widget _mapWithPolygons(Set<Polygon>? polygons) {
  return Directionality(
    textDirection: TextDirection.ltr,
    child: AppleMap(
      initialCameraPosition: const CameraPosition(target: LatLng(10.0, 15.0)),
      polygons: polygons,
    ),
  );
}

void main() {
  TestWidgetsFlutterBinding.ensureInitialized();

  final FakePlatformViewsController fakePlatformViewsController =
      FakePlatformViewsController();

  setUpAll(() {
    SystemChannels.platform_views.setMockMethodCallHandler(
        fakePlatformViewsController.fakePlatformViewsMethodHandler);
  });

  setUp(() {
    fakePlatformViewsController.reset();
  });

  testWidgets('Initializing a polygon', (WidgetTester tester) async {
    debugDefaultTargetPlatformOverride = TargetPlatform.iOS;
    final Polygon p1 = Polygon(polygonId: PolygonId("polygon_1"));
    await tester.pumpWidget(_mapWithPolygons(_toSet(p1: p1)));

    final FakePlatformAppleMap platformAppleMap =
        fakePlatformViewsController.lastCreatedView!;
    expect(platformAppleMap.polygonsToAdd!.length, 1);

    final Polygon initializedPolygon = platformAppleMap.polygonsToAdd!.first;
    expect(initializedPolygon, equals(p1));
    expect(platformAppleMap.polygonIdsToRemove!.isEmpty, true);
    expect(platformAppleMap.polygonsToChange!.isEmpty, true);
    debugDefaultTargetPlatformOverride = null;
  });

  testWidgets("Adding a polygon", (WidgetTester tester) async {
    debugDefaultTargetPlatformOverride = TargetPlatform.iOS;
    final Polygon p1 = Polygon(polygonId: PolygonId("polygon_1"));
    final Polygon p2 = Polygon(polygonId: PolygonId("polygon_2"));

    await tester.pumpWidget(_mapWithPolygons(_toSet(p1: p1)));
    await tester.pumpWidget(_mapWithPolygons(_toSet(p1: p1, p2: p2)));

    final FakePlatformAppleMap platformAppleMap =
        fakePlatformViewsController.lastCreatedView!;
    expect(platformAppleMap.polygonsToAdd!.length, 1);

    final Polygon addedPolygon = platformAppleMap.polygonsToAdd!.first;
    expect(addedPolygon, equals(p2));

    expect(platformAppleMap.polygonIdsToRemove!.isEmpty, true);

    expect(platformAppleMap.polygonsToChange!.isEmpty, true);
    debugDefaultTargetPlatformOverride = null;
  });

  testWidgets("Removing a polygon", (WidgetTester tester) async {
    debugDefaultTargetPlatformOverride = TargetPlatform.iOS;
    final Polygon p1 = Polygon(polygonId: PolygonId("polygon_1"));

    await tester.pumpWidget(_mapWithPolygons(_toSet(p1: p1)));
    await tester.pumpWidget(_mapWithPolygons(null));

    final FakePlatformAppleMap platformAppleMap =
        fakePlatformViewsController.lastCreatedView!;
    expect(platformAppleMap.polygonIdsToRemove!.length, 1);
    expect(platformAppleMap.polygonIdsToRemove!.first, equals(p1.polygonId));

    expect(platformAppleMap.polygonsToChange!.isEmpty, true);
    expect(platformAppleMap.polygonsToAdd!.isEmpty, true);
    debugDefaultTargetPlatformOverride = null;
  });

  testWidgets("Updating a polygon", (WidgetTester tester) async {
    debugDefaultTargetPlatformOverride = TargetPlatform.iOS;
    final Polygon p1 = Polygon(polygonId: PolygonId("polygon_1"));
    final Polygon p2 =
        Polygon(polygonId: PolygonId("polygon_1"), visible: false);

    await tester.pumpWidget(_mapWithPolygons(_toSet(p1: p1)));
    await tester.pumpWidget(_mapWithPolygons(_toSet(p1: p2)));

    final FakePlatformAppleMap platformAppleMap =
        fakePlatformViewsController.lastCreatedView!;
    expect(platformAppleMap.polygonsToChange!.length, 1);
    expect(platformAppleMap.polygonsToChange!.first, equals(p2));

    expect(platformAppleMap.polygonIdsToRemove!.isEmpty, true);
    expect(platformAppleMap.polygonsToAdd!.isEmpty, true);
    debugDefaultTargetPlatformOverride = null;
  });

  testWidgets("Updating a polygon", (WidgetTester tester) async {
    debugDefaultTargetPlatformOverride = TargetPlatform.iOS;
    final Polygon p1 = Polygon(polygonId: PolygonId("polygon_1"));
    final Polygon p2 =
        Polygon(polygonId: PolygonId("polygon_1"), visible: false);

    await tester.pumpWidget(_mapWithPolygons(_toSet(p1: p1)));
    await tester.pumpWidget(_mapWithPolygons(_toSet(p1: p2)));

    final FakePlatformAppleMap platformAppleMap =
        fakePlatformViewsController.lastCreatedView!;
    expect(platformAppleMap.polygonsToChange!.length, 1);

    final Polygon update = platformAppleMap.polygonsToChange!.first;
    expect(update, equals(p2));
    expect(update.visible, false);
    debugDefaultTargetPlatformOverride = null;
  });

  testWidgets("Mutate a polygon", (WidgetTester tester) async {
    debugDefaultTargetPlatformOverride = TargetPlatform.iOS;
    final Polygon p1 = Polygon(
      polygonId: PolygonId("polygon_1"),
      points: <LatLng>[const LatLng(0.0, 0.0)],
    );
    await tester.pumpWidget(_mapWithPolygons(_toSet(p1: p1)));

    p1.points.add(const LatLng(1.0, 1.0));
    await tester.pumpWidget(_mapWithPolygons(_toSet(p1: p1)));

    final FakePlatformAppleMap platformAppleMap =
        fakePlatformViewsController.lastCreatedView!;
    expect(platformAppleMap.polygonsToChange!.length, 1);
    expect(platformAppleMap.polygonsToChange!.first, equals(p1));

    expect(platformAppleMap.polygonIdsToRemove!.isEmpty, true);
    expect(platformAppleMap.polygonsToAdd!.isEmpty, true);
    debugDefaultTargetPlatformOverride = null;
  });

  testWidgets("Multi Update", (WidgetTester tester) async {
    debugDefaultTargetPlatformOverride = TargetPlatform.iOS;
    Polygon p1 = Polygon(polygonId: PolygonId("polygon_1"));
    Polygon p2 = Polygon(polygonId: PolygonId("polygon_2"));
    final Set<Polygon> prev = _toSet(p1: p1, p2: p2);
    p1 = Polygon(polygonId: PolygonId("polygon_1"), visible: false);
    p2 = Polygon(polygonId: PolygonId("polygon_2"), consumeTapEvents: true);
    final Set<Polygon> cur = _toSet(p1: p1, p2: p2);

    await tester.pumpWidget(_mapWithPolygons(prev));
    await tester.pumpWidget(_mapWithPolygons(cur));

    final FakePlatformAppleMap platformAppleMap =
        fakePlatformViewsController.lastCreatedView!;

    expect(platformAppleMap.polygonsToChange, cur);
    expect(platformAppleMap.polygonIdsToRemove!.isEmpty, true);
    expect(platformAppleMap.polygonsToAdd!.isEmpty, true);
    debugDefaultTargetPlatformOverride = null;
  });

  testWidgets("Multi Update", (WidgetTester tester) async {
    debugDefaultTargetPlatformOverride = TargetPlatform.iOS;
    Polygon p2 = Polygon(polygonId: PolygonId("polygon_2"));
    final Polygon p3 = Polygon(polygonId: PolygonId("polygon_3"));
    final Set<Polygon> prev = _toSet(p2: p2, p3: p3);

    // p1 is added, p2 is updated, p3 is removed.
    final Polygon p1 = Polygon(polygonId: PolygonId("polygon_1"));
    p2 = Polygon(polygonId: PolygonId("polygon_2"), consumeTapEvents: true);
    final Set<Polygon> cur = _toSet(p1: p1, p2: p2);

    await tester.pumpWidget(_mapWithPolygons(prev));
    await tester.pumpWidget(_mapWithPolygons(cur));

    final FakePlatformAppleMap platformAppleMap =
        fakePlatformViewsController.lastCreatedView!;

    expect(platformAppleMap.polygonsToChange!.length, 1);
    expect(platformAppleMap.polygonsToAdd!.length, 1);
    expect(platformAppleMap.polygonIdsToRemove!.length, 1);

    expect(platformAppleMap.polygonsToChange!.first, equals(p2));
    expect(platformAppleMap.polygonsToAdd!.first, equals(p1));
    expect(platformAppleMap.polygonIdsToRemove!.first, equals(p3.polygonId));
    debugDefaultTargetPlatformOverride = null;
  });

  testWidgets("Partial Update", (WidgetTester tester) async {
    debugDefaultTargetPlatformOverride = TargetPlatform.iOS;
    final Polygon p1 = Polygon(polygonId: PolygonId("polygon_1"));
    final Polygon p2 = Polygon(polygonId: PolygonId("polygon_2"));
    Polygon p3 = Polygon(polygonId: PolygonId("polygon_3"));
    final Set<Polygon> prev = _toSet(p1: p1, p2: p2, p3: p3);
    p3 = Polygon(polygonId: PolygonId("polygon_3"), consumeTapEvents: true);
    final Set<Polygon> cur = _toSet(p1: p1, p2: p2, p3: p3);

    await tester.pumpWidget(_mapWithPolygons(prev));
    await tester.pumpWidget(_mapWithPolygons(cur));

    final FakePlatformAppleMap platformAppleMap =
        fakePlatformViewsController.lastCreatedView!;

    expect(platformAppleMap.polygonsToChange, _toSet(p3: p3));
    expect(platformAppleMap.polygonIdsToRemove!.isEmpty, true);
    expect(platformAppleMap.polygonsToAdd!.isEmpty, true);
    debugDefaultTargetPlatformOverride = null;
  });
}