packages/google_maps_flutter/test/google_map_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 'dart:typed_data';

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

void main() {
  final _FakePlatformViewsController fakePlatformViewsController =
      _FakePlatformViewsController();

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

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

  testWidgets('Initial camera position', (WidgetTester tester) async {
    await tester.pumpWidget(
      const Directionality(
        textDirection: TextDirection.ltr,
        child: GoogleMap(
          initialCameraPosition: CameraPosition(target: LatLng(10.0, 15.0)),
        ),
      ),
    );

    final FakePlatformGoogleMap platformGoogleMap =
        fakePlatformViewsController.lastCreatedView;

    expect(platformGoogleMap.cameraPosition,
        const CameraPosition(target: LatLng(10.0, 15.0)));
  });

  testWidgets('Initial camera position change is a no-op',
      (WidgetTester tester) async {
    await tester.pumpWidget(
      const Directionality(
        textDirection: TextDirection.ltr,
        child: GoogleMap(
          initialCameraPosition: CameraPosition(target: LatLng(10.0, 15.0)),
        ),
      ),
    );

    await tester.pumpWidget(
      const Directionality(
        textDirection: TextDirection.ltr,
        child: GoogleMap(
          initialCameraPosition: CameraPosition(target: LatLng(10.0, 16.0)),
        ),
      ),
    );

    final FakePlatformGoogleMap platformGoogleMap =
        fakePlatformViewsController.lastCreatedView;

    expect(platformGoogleMap.cameraPosition,
        const CameraPosition(target: LatLng(10.0, 15.0)));
  });

  testWidgets('Can update compassEnabled', (WidgetTester tester) async {
    await tester.pumpWidget(
      const Directionality(
        textDirection: TextDirection.ltr,
        child: GoogleMap(
          initialCameraPosition: CameraPosition(target: LatLng(10.0, 15.0)),
          compassEnabled: false,
        ),
      ),
    );

    final FakePlatformGoogleMap platformGoogleMap =
        fakePlatformViewsController.lastCreatedView;

    expect(platformGoogleMap.compassEnabled, false);

    await tester.pumpWidget(
      const Directionality(
        textDirection: TextDirection.ltr,
        child: GoogleMap(
          initialCameraPosition: CameraPosition(target: LatLng(10.0, 15.0)),
          compassEnabled: true,
        ),
      ),
    );

    expect(platformGoogleMap.compassEnabled, true);
  });

  testWidgets('Can update cameraTargetBounds', (WidgetTester tester) async {
    await tester.pumpWidget(
      Directionality(
        textDirection: TextDirection.ltr,
        child: GoogleMap(
          initialCameraPosition:
              const CameraPosition(target: LatLng(10.0, 15.0)),
          cameraTargetBounds: CameraTargetBounds(
            LatLngBounds(
              southwest: const LatLng(10.0, 20.0),
              northeast: const LatLng(30.0, 40.0),
            ),
          ),
        ),
      ),
    );

    final FakePlatformGoogleMap platformGoogleMap =
        fakePlatformViewsController.lastCreatedView;

    expect(
        platformGoogleMap.cameraTargetBounds,
        CameraTargetBounds(
          LatLngBounds(
            southwest: const LatLng(10.0, 20.0),
            northeast: const LatLng(30.0, 40.0),
          ),
        ));

    await tester.pumpWidget(
      Directionality(
        textDirection: TextDirection.ltr,
        child: GoogleMap(
          initialCameraPosition:
              const CameraPosition(target: LatLng(10.0, 15.0)),
          cameraTargetBounds: CameraTargetBounds(
            LatLngBounds(
              southwest: const LatLng(16.0, 20.0),
              northeast: const LatLng(30.0, 40.0),
            ),
          ),
        ),
      ),
    );

    expect(
        platformGoogleMap.cameraTargetBounds,
        CameraTargetBounds(
          LatLngBounds(
            southwest: const LatLng(16.0, 20.0),
            northeast: const LatLng(30.0, 40.0),
          ),
        ));
  });

  testWidgets('Can update mapType', (WidgetTester tester) async {
    await tester.pumpWidget(
      const Directionality(
        textDirection: TextDirection.ltr,
        child: GoogleMap(
          initialCameraPosition: CameraPosition(target: LatLng(10.0, 15.0)),
          mapType: MapType.hybrid,
        ),
      ),
    );

    final FakePlatformGoogleMap platformGoogleMap =
        fakePlatformViewsController.lastCreatedView;

    expect(platformGoogleMap.mapType, MapType.hybrid);

    await tester.pumpWidget(
      const Directionality(
        textDirection: TextDirection.ltr,
        child: GoogleMap(
          initialCameraPosition: CameraPosition(target: LatLng(10.0, 15.0)),
          mapType: MapType.satellite,
        ),
      ),
    );

    expect(platformGoogleMap.mapType, MapType.satellite);
  });

  testWidgets('Can update minMaxZoom', (WidgetTester tester) async {
    await tester.pumpWidget(
      const Directionality(
        textDirection: TextDirection.ltr,
        child: GoogleMap(
          initialCameraPosition: CameraPosition(target: LatLng(10.0, 15.0)),
          minMaxZoomPreference: MinMaxZoomPreference(1.0, 3.0),
        ),
      ),
    );

    final FakePlatformGoogleMap platformGoogleMap =
        fakePlatformViewsController.lastCreatedView;

    expect(platformGoogleMap.minMaxZoomPreference,
        const MinMaxZoomPreference(1.0, 3.0));

    await tester.pumpWidget(
      const Directionality(
        textDirection: TextDirection.ltr,
        child: GoogleMap(
          initialCameraPosition: CameraPosition(target: LatLng(10.0, 15.0)),
          minMaxZoomPreference: MinMaxZoomPreference.unbounded,
        ),
      ),
    );

    expect(
        platformGoogleMap.minMaxZoomPreference, MinMaxZoomPreference.unbounded);
  });

  testWidgets('Can update rotateGesturesEnabled', (WidgetTester tester) async {
    await tester.pumpWidget(
      const Directionality(
        textDirection: TextDirection.ltr,
        child: GoogleMap(
          initialCameraPosition: CameraPosition(target: LatLng(10.0, 15.0)),
          rotateGesturesEnabled: false,
        ),
      ),
    );

    final FakePlatformGoogleMap platformGoogleMap =
        fakePlatformViewsController.lastCreatedView;

    expect(platformGoogleMap.rotateGesturesEnabled, false);

    await tester.pumpWidget(
      const Directionality(
        textDirection: TextDirection.ltr,
        child: GoogleMap(
          initialCameraPosition: CameraPosition(target: LatLng(10.0, 15.0)),
          rotateGesturesEnabled: true,
        ),
      ),
    );

    expect(platformGoogleMap.rotateGesturesEnabled, true);
  });

  testWidgets('Can update scrollGesturesEnabled', (WidgetTester tester) async {
    await tester.pumpWidget(
      const Directionality(
        textDirection: TextDirection.ltr,
        child: GoogleMap(
          initialCameraPosition: CameraPosition(target: LatLng(10.0, 15.0)),
          scrollGesturesEnabled: false,
        ),
      ),
    );

    final FakePlatformGoogleMap platformGoogleMap =
        fakePlatformViewsController.lastCreatedView;

    expect(platformGoogleMap.scrollGesturesEnabled, false);

    await tester.pumpWidget(
      const Directionality(
        textDirection: TextDirection.ltr,
        child: GoogleMap(
          initialCameraPosition: CameraPosition(target: LatLng(10.0, 15.0)),
          scrollGesturesEnabled: true,
        ),
      ),
    );

    expect(platformGoogleMap.scrollGesturesEnabled, true);
  });

  testWidgets('Can update tiltGesturesEnabled', (WidgetTester tester) async {
    await tester.pumpWidget(
      const Directionality(
        textDirection: TextDirection.ltr,
        child: GoogleMap(
          initialCameraPosition: CameraPosition(target: LatLng(10.0, 15.0)),
          tiltGesturesEnabled: false,
        ),
      ),
    );

    final FakePlatformGoogleMap platformGoogleMap =
        fakePlatformViewsController.lastCreatedView;

    expect(platformGoogleMap.tiltGesturesEnabled, false);

    await tester.pumpWidget(
      const Directionality(
        textDirection: TextDirection.ltr,
        child: GoogleMap(
          initialCameraPosition: CameraPosition(target: LatLng(10.0, 15.0)),
          tiltGesturesEnabled: true,
        ),
      ),
    );

    expect(platformGoogleMap.tiltGesturesEnabled, true);
  });

  testWidgets('Can update trackCameraPosition', (WidgetTester tester) async {
    await tester.pumpWidget(
      const Directionality(
        textDirection: TextDirection.ltr,
        child: GoogleMap(
          initialCameraPosition: CameraPosition(target: LatLng(10.0, 15.0)),
          trackCameraPosition: false,
        ),
      ),
    );

    final FakePlatformGoogleMap platformGoogleMap =
        fakePlatformViewsController.lastCreatedView;

    expect(platformGoogleMap.trackCameraPosition, false);

    await tester.pumpWidget(
      const Directionality(
        textDirection: TextDirection.ltr,
        child: GoogleMap(
          initialCameraPosition: CameraPosition(target: LatLng(10.0, 15.0)),
          trackCameraPosition: true,
        ),
      ),
    );

    expect(platformGoogleMap.trackCameraPosition, true);
  });

  testWidgets('Can update zoomGesturesEnabled', (WidgetTester tester) async {
    await tester.pumpWidget(
      const Directionality(
        textDirection: TextDirection.ltr,
        child: GoogleMap(
          initialCameraPosition: CameraPosition(target: LatLng(10.0, 15.0)),
          zoomGesturesEnabled: false,
        ),
      ),
    );

    final FakePlatformGoogleMap platformGoogleMap =
        fakePlatformViewsController.lastCreatedView;

    expect(platformGoogleMap.zoomGesturesEnabled, false);

    await tester.pumpWidget(
      const Directionality(
        textDirection: TextDirection.ltr,
        child: GoogleMap(
          initialCameraPosition: CameraPosition(target: LatLng(10.0, 15.0)),
          zoomGesturesEnabled: true,
        ),
      ),
    );

    expect(platformGoogleMap.zoomGesturesEnabled, true);
  });

  testWidgets('Can update myLocationEnabled', (WidgetTester tester) async {
    await tester.pumpWidget(
      const Directionality(
        textDirection: TextDirection.ltr,
        child: GoogleMap(
          initialCameraPosition: CameraPosition(target: LatLng(10.0, 15.0)),
          myLocationEnabled: false,
        ),
      ),
    );

    final FakePlatformGoogleMap platformGoogleMap =
        fakePlatformViewsController.lastCreatedView;

    expect(platformGoogleMap.myLocationEnabled, false);

    await tester.pumpWidget(
      const Directionality(
        textDirection: TextDirection.ltr,
        child: GoogleMap(
          initialCameraPosition: CameraPosition(target: LatLng(10.0, 15.0)),
          myLocationEnabled: true,
        ),
      ),
    );

    expect(platformGoogleMap.myLocationEnabled, true);
  });
}

class FakePlatformGoogleMap {
  FakePlatformGoogleMap(int id, Map<dynamic, dynamic> params) {
    cameraPosition = CameraPosition.fromMap(params['initialCameraPosition']);
    channel = MethodChannel(
        'plugins.flutter.io/google_maps_$id', const StandardMethodCodec());
    channel.setMockMethodCallHandler(onMethodCall);
    updateOptions(params['options']);
  }

  MethodChannel channel;

  CameraPosition cameraPosition;

  bool compassEnabled;

  CameraTargetBounds cameraTargetBounds;

  MapType mapType;

  MinMaxZoomPreference minMaxZoomPreference;

  bool rotateGesturesEnabled;

  bool scrollGesturesEnabled;

  bool tiltGesturesEnabled;

  bool zoomGesturesEnabled;

  bool trackCameraPosition;

  bool myLocationEnabled;

  Future<dynamic> onMethodCall(MethodCall call) {
    switch (call.method) {
      case 'map#update':
        updateOptions(call.arguments['options']);
        return Future<void>.sync(() {});
    }
    return Future<void>.sync(() {});
  }

  void updateOptions(Map<dynamic, dynamic> options) {
    if (options.containsKey('compassEnabled')) {
      compassEnabled = options['compassEnabled'];
    }
    if (options.containsKey('cameraTargetBounds')) {
      final List<dynamic> boundsList = options['cameraTargetBounds'];
      cameraTargetBounds = boundsList[0] == null
          ? CameraTargetBounds.unbounded
          : CameraTargetBounds(LatLngBounds.fromList(boundsList[0]));
    }
    if (options.containsKey('mapType')) {
      mapType = MapType.values[options['mapType']];
    }
    if (options.containsKey('minMaxZoomPreference')) {
      final List<dynamic> minMaxZoomList = options['minMaxZoomPreference'];
      minMaxZoomPreference =
          MinMaxZoomPreference(minMaxZoomList[0], minMaxZoomList[1]);
    }
    if (options.containsKey('rotateGesturesEnabled')) {
      rotateGesturesEnabled = options['rotateGesturesEnabled'];
    }
    if (options.containsKey('scrollGesturesEnabled')) {
      scrollGesturesEnabled = options['scrollGesturesEnabled'];
    }
    if (options.containsKey('tiltGesturesEnabled')) {
      tiltGesturesEnabled = options['tiltGesturesEnabled'];
    }
    if (options.containsKey('trackCameraPosition')) {
      trackCameraPosition = options['trackCameraPosition'];
    }
    if (options.containsKey('zoomGesturesEnabled')) {
      zoomGesturesEnabled = options['zoomGesturesEnabled'];
    }
    if (options.containsKey('myLocationEnabled')) {
      myLocationEnabled = options['myLocationEnabled'];
    }
  }
}

class _FakePlatformViewsController {
  FakePlatformGoogleMap lastCreatedView;

  Future<dynamic> fakePlatformViewsMethodHandler(MethodCall call) {
    switch (call.method) {
      case 'create':
        final Map<dynamic, dynamic> args = call.arguments;
        final Map<dynamic, dynamic> params = _decodeParams(args['params']);
        lastCreatedView = FakePlatformGoogleMap(
          args['id'],
          params,
        );
        return Future<int>.sync(() => 1);
      default:
        return Future<void>.sync(() {});
    }
  }

  void reset() {
    lastCreatedView = null;
  }
}

Map<dynamic, dynamic> _decodeParams(Uint8List paramsMessage) {
  final ByteBuffer buffer = paramsMessage.buffer;
  final ByteData messageBytes = buffer.asByteData(
    paramsMessage.offsetInBytes,
    paramsMessage.lengthInBytes,
  );
  return const StandardMessageCodec().decodeMessage(messageBytes);
}