Refactor to add conftest.py to share fixtures

fix the entry model to not allow the title nor the date to be null

src/pilgrim/models/entry.py

@@ -11,9 +11,9 @@ from pilgrim.database import Base
 class Entry(Base):
     __tablename__ = "entries"
     id = Column(Integer, primary_key=True)
-    title = Column(String)
+    title = Column(String,nullable=False)
     text = Column(String)
-    date = Column(DateTime)
+    date = Column(DateTime,nullable=False)
     photos = relationship(
         "Photo",
         secondary=photo_entry_association,

tests/conftest.py

@@ -0,0 +1,28 @@
+import pytest
+from sqlalchemy import create_engine
+from sqlalchemy.orm import sessionmaker
+
+from pilgrim.database import Base
+from pilgrim.models.travel_diary import TravelDiary
+
+# Todos os imports necessários para as fixtures devem estar aqui
+# ...
+
+@pytest.fixture(scope="function")
+def db_session():
+    """Esta fixture agora está disponível para TODOS os testes."""
+    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):
+    """Esta também fica disponível para todos."""
+    travel_diary = TravelDiary(name="My Travel Diary", directory_name="viagem-teste")
+    db_session.add(travel_diary)
+    db_session.commit()
+    return db_session