packages/google_maps_flutter/google_maps_flutter_platform_interface/test/types/tile_overlay_updates_test.dart

// Copyright 2013 The Flutter 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:flutter_test/flutter_test.dart';
import 'package:google_maps_flutter_platform_interface/src/types/tile_overlay.dart';
import 'package:google_maps_flutter_platform_interface/src/types/tile_overlay_updates.dart';
import 'package:google_maps_flutter_platform_interface/src/types/utils/tile_overlay.dart';

void main() {
  TestWidgetsFlutterBinding.ensureInitialized();

  group('tile overlay updates tests', () {
    test('Correctly set toRemove, toAdd and toChange', () async {
      const TileOverlay to1 = TileOverlay(tileOverlayId: TileOverlayId('id1'));
      const TileOverlay to2 = TileOverlay(tileOverlayId: TileOverlayId('id2'));
      const TileOverlay to3 = TileOverlay(tileOverlayId: TileOverlayId('id3'));
      const TileOverlay to3Changed =
          TileOverlay(tileOverlayId: TileOverlayId('id3'), transparency: 0.5);
      const TileOverlay to4 = TileOverlay(tileOverlayId: TileOverlayId('id4'));
      final Set<TileOverlay> previous = <TileOverlay>{to1, to2, to3};
      final Set<TileOverlay> current = <TileOverlay>{to2, to3Changed, to4};
      final TileOverlayUpdates updates =
          TileOverlayUpdates.from(previous, current);

      final Set<TileOverlayId> toRemove = <TileOverlayId>{
        const TileOverlayId('id1')
      };
      expect(updates.tileOverlayIdsToRemove, toRemove);

      final Set<TileOverlay> toAdd = <TileOverlay>{to4};
      expect(updates.tileOverlaysToAdd, toAdd);

      final Set<TileOverlay> toChange = <TileOverlay>{to3Changed};
      expect(updates.tileOverlaysToChange, toChange);
    });

    test('toJson', () async {
      const TileOverlay to1 = TileOverlay(tileOverlayId: TileOverlayId('id1'));
      const TileOverlay to2 = TileOverlay(tileOverlayId: TileOverlayId('id2'));
      const TileOverlay to3 = TileOverlay(tileOverlayId: TileOverlayId('id3'));
      const TileOverlay to3Changed =
          TileOverlay(tileOverlayId: TileOverlayId('id3'), transparency: 0.5);
      const TileOverlay to4 = TileOverlay(tileOverlayId: TileOverlayId('id4'));
      final Set<TileOverlay> previous = <TileOverlay>{to1, to2, to3};
      final Set<TileOverlay> current = <TileOverlay>{to2, to3Changed, to4};
      final TileOverlayUpdates updates =
          TileOverlayUpdates.from(previous, current);

      final Object json = updates.toJson();
      expect(json, <String, Object>{
        'tileOverlaysToAdd': serializeTileOverlaySet(updates.tileOverlaysToAdd),
        'tileOverlaysToChange':
            serializeTileOverlaySet(updates.tileOverlaysToChange),
        'tileOverlayIdsToRemove': updates.tileOverlayIdsToRemove
            .map<String>((TileOverlayId m) => m.value)
            .toList()
      });
    });

    test('equality', () async {
      const TileOverlay to1 = TileOverlay(tileOverlayId: TileOverlayId('id1'));
      const TileOverlay to2 = TileOverlay(tileOverlayId: TileOverlayId('id2'));
      const TileOverlay to3 = TileOverlay(tileOverlayId: TileOverlayId('id3'));
      const TileOverlay to3Changed =
          TileOverlay(tileOverlayId: TileOverlayId('id3'), transparency: 0.5);
      const TileOverlay to4 = TileOverlay(tileOverlayId: TileOverlayId('id4'));
      final Set<TileOverlay> previous = <TileOverlay>{to1, to2, to3};
      final Set<TileOverlay> current1 = <TileOverlay>{to2, to3Changed, to4};
      final Set<TileOverlay> current2 = <TileOverlay>{to2, to3Changed, to4};
      final Set<TileOverlay> current3 = <TileOverlay>{to2, to4};
      final TileOverlayUpdates updates1 =
          TileOverlayUpdates.from(previous, current1);
      final TileOverlayUpdates updates2 =
          TileOverlayUpdates.from(previous, current2);
      final TileOverlayUpdates updates3 =
          TileOverlayUpdates.from(previous, current3);
      expect(updates1, updates2);
      expect(updates1, isNot(updates3));
    });

    test('hashCode', () async {
      const TileOverlay to1 = TileOverlay(tileOverlayId: TileOverlayId('id1'));
      const TileOverlay to2 = TileOverlay(tileOverlayId: TileOverlayId('id2'));
      const TileOverlay to3 = TileOverlay(tileOverlayId: TileOverlayId('id3'));
      const TileOverlay to3Changed =
          TileOverlay(tileOverlayId: TileOverlayId('id3'), transparency: 0.5);
      const TileOverlay to4 = TileOverlay(tileOverlayId: TileOverlayId('id4'));
      final Set<TileOverlay> previous = <TileOverlay>{to1, to2, to3};
      final Set<TileOverlay> current = <TileOverlay>{to2, to3Changed, to4};
      final TileOverlayUpdates updates =
          TileOverlayUpdates.from(previous, current);
      expect(
          updates.hashCode,
          Object.hash(
              Object.hashAll(updates.tileOverlaysToAdd),
              Object.hashAll(updates.tileOverlayIdsToRemove),
              Object.hashAll(updates.tileOverlaysToChange)));
    });

    test('toString', () async {
      const TileOverlay to1 = TileOverlay(tileOverlayId: TileOverlayId('id1'));
      const TileOverlay to2 = TileOverlay(tileOverlayId: TileOverlayId('id2'));
      const TileOverlay to3 = TileOverlay(tileOverlayId: TileOverlayId('id3'));
      const TileOverlay to3Changed =
          TileOverlay(tileOverlayId: TileOverlayId('id3'), transparency: 0.5);
      const TileOverlay to4 = TileOverlay(tileOverlayId: TileOverlayId('id4'));
      final Set<TileOverlay> previous = <TileOverlay>{to1, to2, to3};
      final Set<TileOverlay> current = <TileOverlay>{to2, to3Changed, to4};
      final TileOverlayUpdates updates =
          TileOverlayUpdates.from(previous, current);
      expect(
          updates.toString(),
          'TileOverlayUpdates(add: ${updates.tileOverlaysToAdd}, '
          'remove: ${updates.tileOverlayIdsToRemove}, '
          'change: ${updates.tileOverlaysToChange})');
    });
  });
}