#396 [Fix] Android FCM 푸시에 title/body가 실리지 않아 알림이 안 뜨던 문제 수정

src/main/java/com/swyp/picke/global/infra/fcm/service/FcmPushService.java

@@ -9,6 +9,7 @@
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.stereotype.Service;
 
+import java.util.HashMap;
 import java.util.Map;
 
 @Slf4j
@@ -23,9 +24,13 @@ public class FcmPushService {
      * iOS는 FCM을 거치지 않고 ApnsPushService가 APNs로 직접 발송한다.
      */
     public void send(UserDevice device, String title, String body, Map<String, String> data) {
+        Map<String, String> payload = new HashMap<>(data);
+        payload.put("title", title);
+        payload.put("body", body);
+
         Message message = Message.builder()
                 .setToken(device.getFcmToken())
-                .putAllData(data)
+                .putAllData(payload)
                 .setAndroidConfig(AndroidConfig.builder()
                         .setPriority(AndroidConfig.Priority.HIGH)
                         .build())

src/test/java/com/swyp/picke/global/infra/fcm/service/FcmPushServiceTest.java

@@ -0,0 +1,59 @@
+package com.swyp.picke.global.infra.fcm.service;
+
+import com.google.firebase.messaging.FirebaseMessaging;
+import com.google.firebase.messaging.Message;
+import com.swyp.picke.domain.notification.entity.UserDevice;
+import com.swyp.picke.domain.notification.enums.DevicePlatform;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.ArgumentCaptor;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+import java.lang.reflect.Field;
+import java.util.Map;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.verify;
+
+@ExtendWith(MockitoExtension.class)
+class FcmPushServiceTest {
+
+    @Mock
+    private FirebaseMessaging firebaseMessaging;
+
+    @Test
+    void send_includes_title_and_body_in_data_payload() throws Exception {
+        FcmPushService fcmPushService = new FcmPushService(firebaseMessaging);
+        UserDevice device = buildDevice();
+
+        fcmPushService.send(device, "제목", "본문", Map.of("type", "TEST"));
+
+        ArgumentCaptor<Message> messageCaptor = ArgumentCaptor.forClass(Message.class);
+        verify(firebaseMessaging).send(messageCaptor.capture());
+
+        Map<String, String> data = extractData(messageCaptor.getValue());
+        assertThat(data).containsEntry("title", "제목");
+        assertThat(data).containsEntry("body", "본문");
+        assertThat(data).containsEntry("type", "TEST");
+    }
+
+    @SuppressWarnings("unchecked")
+    private Map<String, String> extractData(Message message) throws Exception {
+        Field dataField = Message.class.getDeclaredField("data");
+        dataField.setAccessible(true);
+        return (Map<String, String>) dataField.get(message);
+    }
+
+    private UserDevice buildDevice() throws Exception {
+        UserDevice device = UserDevice.builder()
+                .fcmToken("token")
+                .platform(DevicePlatform.ANDROID)
+                .build();
+        Field idField = device.getClass().getSuperclass().getDeclaredField("id");
+        idField.setAccessible(true);
+        idField.set(device, 1L);
+        return device;
+    }
+}