test: adding TermsAndConditionsUIParams tests

Author: Samo8

test/google_navigation_flutter_test.dart

@@ -1016,7 +1016,7 @@ void main() {
           const String companyName = 'Temp co.';
           const bool showDriverAwareness = true;
           when(
-            sessionMockApi.showTermsAndConditionsDialog(any, any, any),
+            sessionMockApi.showTermsAndConditionsDialog(any, any, any, any),
           ).thenAnswer((Invocation _) async => true);
           final bool accepted =
               await GoogleMapsNavigator.showTermsAndConditionsDialog(
@@ -1031,11 +1031,13 @@ void main() {
               captureAny,
               captureAny,
               captureAny,
+              captureAny,
             ),
           );
           expect(result.captured[0] as String, title);
           expect(result.captured[1] as String, companyName);
           expect(result.captured[2] as bool, showDriverAwareness);
+          expect(result.captured[3], null); // uiParams is null by default
 
           // Reset terms and conditions.
           await GoogleMapsNavigator.resetTermsAccepted();

test/google_navigation_flutter_test.mocks.dart

@@ -115,12 +115,14 @@ class MockTestNavigationSessionApi extends _i1.Mock
     String? title,
     String? companyName,
     bool? shouldOnlyShowDriverAwarenessDisclaimer,
+    _i2.TermsAndConditionsUIParamsDto? uiParams,
   ) =>
       (super.noSuchMethod(
             Invocation.method(#showTermsAndConditionsDialog, [
               title,
               companyName,
               shouldOnlyShowDriverAwarenessDisclaimer,
+              uiParams,
             ]),
             returnValue: _i4.Future<bool>.value(false),
           )

test/types/terms_and_conditions_ui_params_test.dart

@@ -0,0 +1,51 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:google_navigation_flutter/google_navigation_flutter.dart';
+
+void main() {
+  group('TermsAndConditionsUIParams tests', () {
+    test('converts to DTO correctly with all parameters', () {
+      const params = TermsAndConditionsUIParams(
+        backgroundColor: Color(0xFFFFFFFF),
+        titleColor: Color(0xFF1976D2),
+        mainTextColor: Color(0xFF212121),
+        acceptButtonTextColor: Color(0xFF4CAF50),
+        cancelButtonTextColor: Color(0xFFF44336),
+      );
+
+      final dto = params.toDto();
+
+      expect(dto.backgroundColor, 0xFFFFFFFF);
+      expect(dto.titleColor, 0xFF1976D2);
+      expect(dto.mainTextColor, 0xFF212121);
+      expect(dto.acceptButtonTextColor, 0xFF4CAF50);
+      expect(dto.cancelButtonTextColor, 0xFFF44336);
+    });
+
+    test('converts to DTO correctly with null parameters', () {
+      const params = TermsAndConditionsUIParams();
+
+      final dto = params.toDto();
+
+      expect(dto.backgroundColor, null);
+      expect(dto.titleColor, null);
+      expect(dto.mainTextColor, null);
+      expect(dto.acceptButtonTextColor, null);
+      expect(dto.cancelButtonTextColor, null);
+    });
+  });
+}