[google_sign_in_platform_interface] Add availability to mock models (#5669)

Author: Hwan-seok

packages/google_sign_in/google_sign_in_platform_interface/CHANGELOG.md

@@ -1,5 +1,6 @@
 ## 2.1.3
 
+* Enables mocking models by changing overridden operator == parameter type from `dynamic` to `Object`.
 * Removes unnecessary imports.
 * Adds `SignInInitParameters` class to hold all sign in params, including the new `forceCodeForRefreshToken`.
 

packages/google_sign_in/google_sign_in_platform_interface/lib/src/types.dart

@@ -116,7 +116,7 @@ class GoogleSignInUserData {
   @override
   // TODO(stuartmorgan): Make this class immutable in the next breaking change.
   // ignore: avoid_equals_and_hash_code_on_mutable_classes
-  bool operator ==(dynamic other) {
+  bool operator ==(Object other) {
     if (identical(this, other)) {
       return true;
     }
@@ -159,7 +159,7 @@ class GoogleSignInTokenData {
   @override
   // TODO(stuartmorgan): Make this class immutable in the next breaking change.
   // ignore: avoid_equals_and_hash_code_on_mutable_classes
-  bool operator ==(dynamic other) {
+  bool operator ==(Object other) {
     if (identical(this, other)) {
       return true;
     }

packages/google_sign_in/google_sign_in_platform_interface/test/google_sign_in_platform_interface_test.dart

@@ -29,6 +29,44 @@ void main() {
       GoogleSignInPlatform.instance = ImplementsWithIsMock();
     });
   });
+
+  group('GoogleSignInTokenData', () {
+    test('can be compared by == operator', () {
+      final GoogleSignInTokenData firstInstance = GoogleSignInTokenData(
+        accessToken: 'accessToken',
+        idToken: 'idToken',
+        serverAuthCode: 'serverAuthCode',
+      );
+      final GoogleSignInTokenData secondInstance = GoogleSignInTokenData(
+        accessToken: 'accessToken',
+        idToken: 'idToken',
+        serverAuthCode: 'serverAuthCode',
+      );
+      expect(firstInstance == secondInstance, isTrue);
+    });
+  });
+
+  group('GoogleSignInUserData', () {
+    test('can be compared by == operator', () {
+      final GoogleSignInUserData firstInstance = GoogleSignInUserData(
+        email: 'email',
+        id: 'id',
+        displayName: 'displayName',
+        photoUrl: 'photoUrl',
+        idToken: 'idToken',
+        serverAuthCode: 'serverAuthCode',
+      );
+      final GoogleSignInUserData secondInstance = GoogleSignInUserData(
+        email: 'email',
+        id: 'id',
+        displayName: 'displayName',
+        photoUrl: 'photoUrl',
+        idToken: 'idToken',
+        serverAuthCode: 'serverAuthCode',
+      );
+      expect(firstInstance == secondInstance, isTrue);
+    });
+  });
 }
 
 class ImplementsWithIsMock extends Mock implements GoogleSignInPlatform {