Fix dashboard stats aggregation

backend/tests/test_dashboard.py

@@ -0,0 +1,68 @@
+"""Tests for dashboard overview statistics"""
+import pytest
+from httpx import AsyncClient
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.models.social import Post
+from app.models.video import Video
+from app.models.device import Device
+
+
+@pytest.mark.asyncio
+async def test_dashboard_overview_reflects_user_content(
+    client: AsyncClient,
+    auth_headers,
+    db_session: AsyncSession,
+    test_user,
+):
+    """Ensure the dashboard aggregates posts, videos, and devices correctly."""
+
+    user_id = test_user["id"]
+
+    posts = [
+        Post(user_id=user_id, content="Post A"),
+        Post(user_id=user_id, content="Post B"),
+    ]
+
+    videos = [
+        Video(user_id=user_id, title="Video 1", video_url="http://example.com/1", views_count=10),
+        Video(user_id=user_id, title="Video 2", video_url="http://example.com/2", views_count=25),
+    ]
+
+    devices = [
+        Device(
+            device_id="dev-1",
+            name="Living Room Pi",
+            device_type="pi4",
+            owner_id=user_id,
+            is_online=True,
+        ),
+        Device(
+            device_id="dev-2",
+            name="Bedroom Pi",
+            device_type="pi4",
+            owner_id=user_id,
+            is_online=False,
+        ),
+    ]
+
+    db_session.add_all(posts + videos + devices)
+    await db_session.commit()
+
+    response = await client.get("/api/dashboard/overview", headers=auth_headers)
+    assert response.status_code == 200
+    payload = response.json()
+
+    def get_service(name: str):
+        return next(service for service in payload["services"] if service["name"] == name)
+
+    social_stats = get_service("Social Media")["stats"]
+    assert social_stats["posts"] == len(posts)
+
+    video_stats = get_service("Video Platform")["stats"]
+    assert video_stats["videos"] == len(videos)
+    assert video_stats["views"] == sum(video.views_count for video in videos)
+
+    device_stats = get_service("Devices (IoT/Pi)")["stats"]
+    assert device_stats["total"] == len(devices)
+    assert device_stats["online"] == sum(1 for device in devices if device.is_online)