test(entry_service): add unit test for creating a new entry

This commit introduces the first unit test for the EntryService,
covering the "happy path" for the `create` method.

It verifies that a new entry is correctly persisted to the database,
including its relationship with associated Photo objects. The test
leverages fixtures to create an isolated, in-memory database
populated with the necessary dependencies.

tests/service/test_entry_service.py

@@ -0,0 +1,55 @@
+import pytest
+from datetime import datetime
+from unittest.mock import Mock
+from sqlalchemy import create_engine
+from sqlalchemy.orm import sessionmaker
+
+from pilgrim.database import Base
+from pilgrim.models.travel_diary import TravelDiary
+from pilgrim.models.entry import Entry
+from pilgrim.models.photo import Photo
+
+from pilgrim.service.entry_service import EntryService
+
+@pytest.fixture(scope="function")
+def db_session():
+    engine = create_engine("sqlite:///:memory:")
+
+    Base.metadata.create_all(engine)
+    Session = sessionmaker(bind=engine)
+    session = Session()
+    yield session
+    session.close()
+    Base.metadata.drop_all(engine)
+
+@pytest.fixture
+def populated_db_session(db_session):
+    travel_diary = TravelDiary(name="My Travel Diary", directory_name="viagem-teste")
+    db_session.add(travel_diary)
+    db_session.commit()
+    return db_session
+
+def test_create_entry_successfully(populated_db_session):
+    session = populated_db_session
+    service = EntryService(session)
+    diary_id = 1  # Sabemos que o ID é 1 por causa da nossa fixture
+    title = "Primeiro Dia na Praia"
+    text = "O dia foi ensolarado e o mar estava ótimo."
+    date = datetime(2025, 7, 20)
+    photos = [Photo(filepath="/path/to/photo1.jpg",name="Photo 1",photo_hash="hash_12345678",fk_travel_diary_id=diary_id), Photo(filepath="/path/to/photo2.jpg",name="Photo 1",photo_hash="hash_87654321",fk_travel_diary_id=diary_id)]
+    created_entry = service.create(
+        travel_diary_id=diary_id,
+        title=title,
+        text=text,
+        date=date,
+        photos=photos
+    )
+    assert created_entry is not None
+    assert created_entry.id is not None  # Garante que foi salvo no BD e tem um ID
+    assert created_entry.title == title
+    assert created_entry.text == text
+    assert len(created_entry.photos) == 2
+    assert created_entry.photos[0].filepath == "/path/to/photo1.jpg"
+
+    entry_in_db = session.query(Entry).filter_by(id=created_entry.id).one()
+    assert entry_in_db.title == "Primeiro Dia na Praia"