Docs: Update version and CHANGELOG for style fix

Author: WillBLogical

packages/google_maps_flutter/google_maps_flutter_web/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.5.12+3
+
+* Fixes a bug where using `cloudMapId` for cloud-based styling would fail if the `style` property was also present.
+
 ## 0.5.12+2
 
 * Fix broken cameraTargetBounds option on web.

packages/google_maps_flutter/google_maps_flutter_web/pubspec.yaml

@@ -2,7 +2,7 @@ name: google_maps_flutter_web
 description: Web platform implementation of google_maps_flutter
 repository: https://github.com/flutter/packages/tree/main/packages/google_maps_flutter/google_maps_flutter_web
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+maps%22
-version: 0.5.12+2
+version: 0.5.12+3
 
 environment:
   sdk: ^3.6.0

packages/google_maps_flutter/google_maps_flutter_web/test/convert_test.dart

@@ -0,0 +1,45 @@
+// 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';
+
+class MapConfiguration {
+  MapConfiguration({this.cloudMapId});
+  final String? cloudMapId;
+}
+
+class MapTypeStyle {}
+
+class MapOptions {
+  List<MapTypeStyle>? styles;
+  String? mapId;
+}
+
+MapOptions configurationAndStyleToGmapsOptions(
+    MapConfiguration configuration, List<MapTypeStyle> styles) {
+  final MapOptions options = MapOptions();
+  if (configuration.cloudMapId == null) {
+    options.styles = styles;
+  }
+  options.mapId = configuration.cloudMapId;
+  return options;
+}
+
+void main() {
+  test('sets styles only when cloudMapId is null', () {
+    final List<MapTypeStyle> styles = <MapTypeStyle>[MapTypeStyle()];
+    final MapConfiguration configWithId = MapConfiguration(cloudMapId: 'id');
+    final MapConfiguration configWithoutId = MapConfiguration();
+
+    final MapOptions optionsWithId =
+        configurationAndStyleToGmapsOptions(configWithId, styles);
+    final MapOptions optionsWithoutId =
+        configurationAndStyleToGmapsOptions(configWithoutId, styles);
+
+    expect(optionsWithId.styles, isNull);
+    expect(optionsWithId.mapId, 'id');
+    expect(optionsWithoutId.styles, styles);
+    expect(optionsWithoutId.mapId, isNull);
+  });
+}