Add validation for display_order and EventMedia tests

Introduce a `validate_display_order` method to ensure a default value of 0 for `display_order`. Extend testing infrastructure with fixtures and unit tests for `EventMedia` to validate properties, metadata, and default behaviors.

backend/tests/conftest.py

@@ -3,6 +3,7 @@ import pytest
 import uuid
 from app.models.user import User
 from app.utils.test_utils import setup_test_db, teardown_test_db
+from app.models import GiftItem, GiftStatus, GiftPriority, RSVP, RSVPStatus, EventMedia, MediaType, MediaPurpose
 
 
 @pytest.fixture(scope="function")
@@ -39,3 +40,74 @@ def mock_user(db_session):
     db_session.add(mock_user)
     db_session.commit()
     return mock_user
+
+
+@pytest.fixture
+def gift_item_fixture(db_session, mock_user):
+    """
+    Fixture to create and return a default GiftItem instance.
+    The event_id, added_by, and other necessary attributes are predefined.
+    """
+    gift_item = GiftItem(
+        id=uuid.uuid4(),
+        event_id=uuid.uuid4(),
+        added_by=mock_user.id,
+        name="Default Gift",
+        description="Default gift description.",
+        price=100.00,
+        currency="USD",
+        quantity_requested=5,
+        quantity_received=0,
+        status=GiftStatus.AVAILABLE,
+        priority=GiftPriority.MEDIUM,
+        is_visible=True
+    )
+    db_session.add(gift_item)
+    db_session.commit()
+    return gift_item
+
+
+@pytest.fixture
+def rsvp_fixture(db_session, mock_user):
+    """
+    Fixture to create and return a default RSVP instance.
+    The event_id and guest_id fields are predefined for testing.
+    """
+    rsvp = RSVP(
+        id=uuid.uuid4(),
+        event_id=uuid.uuid4(),
+        guest_id=uuid.uuid4(),
+        status=RSVPStatus.ATTENDING,
+        number_of_guests=2,
+        response_message="Looking forward to the event!",
+        dietary_requirements="Vegetarian",
+    )
+    db_session.add(rsvp)
+    db_session.commit()
+    return rsvp
+
+
+@pytest.fixture
+def event_media_fixture(db_session, mock_user):
+    """
+    Fixture to create and return a default EventMedia instance.
+    """
+    event_media = EventMedia(
+        id=uuid.uuid4(),
+        event_id=uuid.uuid4(),
+        uploaded_by=mock_user.id,
+        file_path="uploads/sample.jpg",
+        original_filename="sample.jpg",
+        media_type=MediaType.IMAGE,
+        content_type="image/jpeg",
+        file_size=2048,
+        purpose=MediaPurpose.GALLERY,
+        is_public=True,
+        display_order=1,
+        title="Sample Image",
+        description="A sample image for testing.",
+        media_metadata={"resolution": "1920x1080"},
+    )
+    db_session.add(event_media)
+    db_session.commit()
+    return event_media

backend/tests/models/test_event_media.py

@@ -0,0 +1,104 @@
+# tests/models/test_event_media.py
+import uuid
+from app.models.event_media import EventMedia, MediaType, MediaPurpose
+
+
+def test_create_event_media(db_session, mock_user):
+    # Arrange
+    event_media = EventMedia(
+        id=uuid.uuid4(),
+        event_id=uuid.uuid4(),
+        uploaded_by=mock_user.id,
+        file_path="uploads/test_image.jpg",
+        original_filename="test_image.jpg",
+        media_type=MediaType.IMAGE,
+        content_type="image/jpeg",
+        file_size=1024,
+        purpose=MediaPurpose.BANNER,
+        is_public=False,
+        display_order=0,
+        title="Test Image",
+        description="This is a test image.",
+        media_metadata={"resolution": "1024x768"},
+    )
+    db_session.add(event_media)
+
+    # Act
+    db_session.commit()
+    created_media = db_session.query(EventMedia).filter_by(id=event_media.id).first()
+
+    # Assert
+    assert created_media is not None
+    assert created_media.file_path == "uploads/test_image.jpg"
+    assert created_media.original_filename == "test_image.jpg"
+    assert created_media.media_type == MediaType.IMAGE
+    assert created_media.file_size == 1024
+    assert created_media.purpose == MediaPurpose.BANNER
+    assert created_media.is_public is False
+    assert created_media.media_metadata == {"resolution": "1024x768"}
+
+
+def test_is_image_property(event_media_fixture):
+    # Act
+    is_image = event_media_fixture.is_image
+
+    # Assert
+    assert is_image is True  # Fixture sets media_type to MediaType.IMAGE
+
+    # Update media type to VIDEO and re-check
+    event_media_fixture.media_type = MediaType.VIDEO
+    assert event_media_fixture.is_image is False
+
+
+def test_is_video_property(event_media_fixture):
+    # Act
+    is_video = event_media_fixture.is_video
+
+    # Assert
+    assert is_video is False  # Fixture sets media_type to MediaType.IMAGE
+
+    # Update media type to VIDEO and re-check
+    event_media_fixture.media_type = MediaType.VIDEO
+    assert event_media_fixture.is_video is True
+
+
+def test_is_document_property(event_media_fixture):
+    # Act
+    is_document = event_media_fixture.is_document
+
+    # Assert
+    assert is_document is False  # Fixture sets media_type to MediaType.IMAGE
+
+    # Update media type to DOCUMENT and re-check
+    event_media_fixture.media_type = MediaType.DOCUMENT
+    assert event_media_fixture.is_document is True
+
+
+def test_url_property(event_media_fixture):
+    # Act
+    url = event_media_fixture.url
+
+    # Assert
+    # Since the `url` method is not implemented, it should currently return None
+    assert url is None  # Implement this logic if further changes are made
+
+
+def test_default_display_order(event_media_fixture):
+    # Arrange
+    event_media_fixture.display_order = None
+
+    # Assert default value
+    # Ensure display_order defaults to 0
+    assert event_media_fixture.display_order == 0
+
+
+def test_media_metadata(event_media_fixture):
+    # Act
+    metadata = event_media_fixture.media_metadata
+
+    # Assert
+    assert metadata == {"resolution": "1920x1080"}
+
+    # Update and check
+    event_media_fixture.media_metadata = {"resolution": "1280x720"}
+    assert event_media_fixture.media_metadata == {"resolution": "1280x720"}