Global refactoring of the project to use poetry and implement tests,

fixing bugs, changing the handling of dto and db models, preparing to
add new functionality

tests/test_books.py

@@ -0,0 +1,58 @@
+import pytest
+from alembic import command
+from alembic.config import Config
+from fastapi.testclient import TestClient
+from sqlmodel import select, delete, Session
+
+from library_service.main import app
+from tests.test_misc import setup_database
+
+client = TestClient(app)
+
+#TODO: assert descriptions
+#TODO: add comments
+#TODO: update tests
+
+def test_create_book(setup_database):
+    response = client.post("/books", json={"title": "Test Book", "description": "Test Description"})
+    print(response.json())
+    assert response.status_code == 200
+    assert response.json() == {"id": 1, "title": "Test Book", "description": "Test Description"}
+
+def test_get_existing_book(setup_database):
+    response = client.get("/books/1")
+    print(response.json())
+    assert response.status_code == 200
+    assert response.json() == {"id": 1, "title": "Test Book", "description": "Test Description", 'authors': []}
+
+def test_get_not_existing_book(setup_database):
+    response = client.get("/books/2")
+    print(response.json())
+    assert response.status_code == 404
+    assert response.json() == {"detail": "Book not found"}
+
+def test_update_book(setup_database):
+    response = client.get("/books/1")
+    assert response.status_code == 200
+    response = client.put("/books/1", json={"title": "Updated Book", "description": "Updated Description"})
+    assert response.status_code == 200
+    assert response.json() == {"id": 1, "title": "Updated Book", "description": "Updated Description"}
+
+def test_update_not_existing_book(setup_database):
+    response = client.put("/books/2", json={"title": "Updated Book", "description": "Updated Description"})
+    assert response.status_code == 404
+    assert response.json() == {"detail": "Book not found"}
+
+def test_delete_book(setup_database):
+    response = client.get("/books/1")
+    assert response.status_code == 200
+    response = client.delete("/books/1")
+    assert response.status_code == 200
+    assert response.json() == {"id": 1, "title": "Updated Book", "description": "Updated Description"}
+
+def test_not_existing_delete_book(setup_database):
+    response = client.delete("/books/2")
+    assert response.status_code == 404
+    assert response.json() == {"detail": "Book not found"}
+
+#TODO: add tests for other books endpoints