Add the tests for the read methods for the photo service

src/pilgrim/models/photo.py

@@ -25,8 +25,7 @@ class Photo(Base):
         back_populates="photos"
     )
 
-    fk_travel_diary_id = Column(Integer, ForeignKey("travel_diaries.id"), nullable=False)
+    fk_travel_diary_id = Column(Integer, ForeignKey("travel_diaries.id"),nullable=False)
-    travel_diary = relationship("TravelDiary", back_populates="photos")
     __table_args__ = (
         Index('idx_photo_hash_diary', 'hash', 'fk_travel_diary_id'),
     )

src/pilgrim/models/travel_diary.py

@@ -13,7 +13,6 @@ class TravelDiary(Base):
     name = Column(String, nullable=False)
     directory_name = Column(String, nullable=False, unique=True)
     entries = relationship("Entry", back_populates="travel_diary", cascade="all, delete-orphan")
-    photos = relationship("Photo", back_populates="travel_diary", cascade="all, delete-orphan")
 
     __table_args__ = (
         UniqueConstraint('directory_name', name='uq_travel_diary_directory_name'),

tests/conftest.py

@@ -2,6 +2,7 @@ import pytest
 from sqlalchemy import create_engine
 from sqlalchemy.orm import sessionmaker
 
+from pilgrim import Photo
 from pilgrim.database import Base
 from pilgrim.models.travel_diary import TravelDiary
 
@@ -34,3 +35,26 @@ def session_with_one_diary(db_session):
     db_session.commit()
     db_session.refresh(diary)
     return db_session, diary
+
+
+@pytest.fixture
+def session_with_photos(session_with_one_diary):
+    """
+    Fixture que usa a session_with_one_diary e adiciona duas fotos a ela.
+    """
+    session, diary = session_with_one_diary
+
+    photo1 = Photo(
+        filepath=f"/fake/{diary.directory_name}/p1.jpg", name="Foto 1",
+        photo_hash="hash1", fk_travel_diary_id=diary.id
+    )
+    photo2 = Photo(
+        filepath=f"/fake/{diary.directory_name}/p2.jpg", name="Foto 2",
+        photo_hash="hash2", fk_travel_diary_id=diary.id
+    )
+
+    session.add_all([photo1, photo2])
+    session.commit()
+
+    # Retornamos a sessão e os objetos criados para que os testes possam usá-los
+    return session, [photo1, photo2]

tests/service/test_photo_service.py

@@ -0,0 +1,108 @@
+import pytest
+from pathlib import Path
+from pilgrim.service.photo_service import PhotoService
+import hashlib
+from unittest.mock import patch
+from pilgrim.models.photo import Photo
+
+@patch.object(PhotoService, '_copy_photo_to_diary')
+@patch.object(PhotoService, 'hash_file', return_value="fake_hash_123")
+def test_create_photo_successfully(mock_hash, mock_copy, session_with_one_diary):
+    session, diary = session_with_one_diary
+    service = PhotoService(session)
+    fake_source_path = Path("/path/original/imagem.jpg")
+    fake_copied_path = Path(f"~/.pilgrim/diaries/{diary.directory_name}/images/imagem.jpg")
+    mock_copy.return_value = fake_copied_path
+    new_photo = service.create(
+        filepath=fake_source_path,
+        name="Foto da Praia",
+        travel_diary_id=diary.id,
+        caption="Pôr do sol")
+    mock_hash.assert_called_once_with(fake_source_path)
+    mock_copy.assert_called_once_with(fake_source_path, diary)
+    assert new_photo is not None
+    assert new_photo.name == "Foto da Praia"
+    assert new_photo.photo_hash == "fake_hash_123"
+    assert new_photo.filepath == str(fake_copied_path)
+
+def test_hash_file_generates_correct_hash(tmp_path: Path):
+    original_content_bytes = b"um conteudo de teste para o hash"
+    file_on_disk = tmp_path / "test.jpg"
+    file_on_disk.write_bytes(original_content_bytes)
+    hash_from_file = PhotoService.hash_file(file_on_disk)
+    expected_hash_func = hashlib.new('sha3_384')
+    expected_hash_func.update(original_content_bytes)
+    hash_from_memory = expected_hash_func.hexdigest()
+    assert hash_from_file == hash_from_memory
+
+@patch.object(PhotoService, '_copy_photo_to_diary')
+@patch.object(PhotoService, 'hash_file', return_value="hash_ja_existente")
+def test_create_photo_returns_none_if_hash_exists(mock_hash, mock_copy, session_with_one_diary):
+    session, diary = session_with_one_diary
+    existing_photo = Photo(
+        filepath="/path/existente.jpg", name="Foto Antiga",
+        photo_hash="hash_ja_existente", fk_travel_diary_id=diary.id
+    )
+    session.add(existing_photo)
+    session.commit()
+
+    service = PhotoService(session)
+    new_photo = service.create(
+        filepath=Path("/path/novo/arquivo.jpg"),
+        name="Foto Nova",
+        travel_diary_id=diary.id
+    )
+    assert new_photo is None
+    mock_copy.assert_not_called()
+
+def test_read_by_id_successfully(session_with_photos):
+    session, photos = session_with_photos
+    service = PhotoService(session)
+    photo_to_find_id = photos[0].id
+    found_photo = service.read_by_id(photo_to_find_id)
+    assert found_photo is not None
+    assert found_photo.id == photo_to_find_id
+    assert found_photo.name == "Foto 1"
+
+def test_read_by_id_returns_none_for_invalid_id(db_session):
+    service = PhotoService(db_session)
+    result = service.read_by_id(999)
+    assert result is None
+
+def test_read_all_returns_all_photos(session_with_photos):
+    session, _ = session_with_photos
+    service = PhotoService(session)
+    all_photos = service.read_all()
+
+    assert isinstance(all_photos, list)
+    assert len(all_photos) == 2
+    assert all_photos[0].name == "Foto 1"
+    assert all_photos[1].name == "Foto 2"
+
+def test_read_all_returns_empty_list_for_empty_db(db_session):
+    service = PhotoService(db_session)
+    all_photos = service.read_all()
+    assert isinstance(all_photos, list)
+    assert len(all_photos) == 0
+
+def test_check_photo_by_hash_finds_existing_photo(session_with_photos):
+    session, photos = session_with_photos
+    service = PhotoService(session)
+    existing_photo = photos[0]
+    hash_to_find = existing_photo.photo_hash  # "hash1"
+    diary_id = existing_photo.fk_travel_diary_id  # 1
+    found_photo = service.check_photo_by_hash(hash_to_find, diary_id)
+    assert found_photo is not None
+    assert found_photo.id == existing_photo.id
+    assert found_photo.photo_hash == hash_to_find
+
+def test_check_photo_by_hash_returns_none_when_not_found(session_with_photos):
+    session, photos = session_with_photos
+    service = PhotoService(session)
+    existing_hash = photos[0].photo_hash  # "hash1"
+    existing_diary_id = photos[0].fk_travel_diary_id  # 1
+    result1 = service.check_photo_by_hash("hash_inexistente", existing_diary_id)
+    assert result1 is None
+    invalid_diary_id = 999
+    result2 = service.check_photo_by_hash(existing_hash, invalid_diary_id)
+    assert result2 is None