chore(llc): add tests

packages/stream_chat/test/src/core/api/responses_test.dart

@@ -4340,5 +4340,63 @@ void main() {
       expect(response.members, isA<List<Member>>());
       expect(response.message, isA<Message>());
     });
+
+    test('AgoraPayload', () {
+      const jsonExample = '''
+      {"channel":"test"}
+      ''';
+      final response = AgoraPayload.fromJson(json.decode(jsonExample));
+      expect(response.channel, isA<String>());
+    });
+
+    test('CallPayload', () {
+      const jsonExample = '''
+      {"id":"test",
+      "provider": "test",
+      "agora": {"channel":"test"},
+      "hms":{"room_id":"test", "room_name":"test"}
+      }
+      ''';
+      final response = CallPayload.fromJson(json.decode(jsonExample));
+      expect(response.agora, isA<AgoraPayload>());
+      expect(response.hms, isA<HMSPayload>());
+      expect(response.id, isA<String>());
+      expect(response.provider, isA<String>());
+    });
+  });
+
+  test('CallTokenPayload', () {
+    const jsonExample = '''
+      {"duration": "3ms",
+      "agora_app_id":"test",
+      "agora_uid": 12,
+      "token": "token"}
+      ''';
+    final response = CallTokenPayload.fromJson(json.decode(jsonExample));
+    expect(response.agoraAppId, isA<String>());
+    expect(response.agoraUid, isA<int>());
+    expect(response.token, isA<String>());
+  });
+
+  test('CreateCallPayload', () {
+    const jsonExample = '''
+      {"call": 
+      {"id":"test",
+      "provider": "test",
+      "agora": {"channel":"test"},
+      "hms":{"room_id":"test", "room_name":"test"}
+      }}
+      ''';
+    final response = CreateCallPayload.fromJson(json.decode(jsonExample));
+    expect(response.call, isA<CallPayload>());
+  });
+
+  test('HMSPayload', () {
+    const jsonExample = '''
+      {"room_id":"test", "room_name":"test"}
+      ''';
+    final response = HMSPayload.fromJson(json.decode(jsonExample));
+    expect(response.roomId, isA<String>());
+    expect(response.roomName, isA<String>());
   });
 }