ref, test: some files refactored and test inits for user added.

chatApp/config/auth.py

@@ -2,22 +2,16 @@
 from typing import Any
 
 from fastapi import Depends
-from fastapi.security import OAuth2PasswordBearer
 from jose import JWTError, jwt
-from passlib.context import CryptContext
 
 from chatApp.config.config import get_settings
 from chatApp.config.logs import logger
 from chatApp.models import user as user_model
+from chatApp.utils import hasher
 from chatApp.utils.exceptions import credentials_exception
 
 settings = get_settings()
 
-# Password hashing context
-pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
-
-# OAuth2 scheme
-oauth2_scheme = OAuth2PasswordBearer(tokenUrl="auth/token")
 
 # JWT settings
 SECRET_KEY = settings.jwt_secret_key.get_secret_value()
@@ -26,27 +20,6 @@
 REFRESH_TOKEN_EXPIRE_DAYS = settings.refresh_token_expire_days
 
 
-def verify_password(plain_password: str, hashed_password: str) -> bool:
-    """
-    Verify if the provided password matches the stored hashed password.
-
-    :param plain_password: The plain text password.
-    :param hashed_password: The hashed password stored in the database.
-    :return: True if passwords match, otherwise False.
-    """
-    return pwd_context.verify(plain_password, hashed_password)
-
-
-def get_password_hash(password: str) -> str:
-    """
-    Hash the given password using the password hashing context.
-
-    :param password: The plain text password to hash.
-    :return: The hashed password.
-    """
-    return pwd_context.hash(password)
-
-
 def create_token(
     data: dict[str, Any],
     token_type: str,
@@ -128,7 +101,7 @@ def validate_token(token: str) -> bool:
 
 
 async def get_current_user(
-    token: str = Depends(oauth2_scheme),
+    token: str = Depends(hasher.oauth2_scheme),
 ) -> user_model.UserInDB:
     """
     Retrieve the current user from the database using the provided JWT token.
@@ -165,7 +138,9 @@ async def authenticate_user(
     )
 
     # Return None if no user was found or if password verification fails
-    if user is None or not verify_password(password, user.hashed_password):
+    if user is None or not hasher.verify_password(
+        password, user.hashed_password
+    ):
         return None
 
     return user

chatApp/config/config.py

@@ -17,6 +17,9 @@ class Settings(BaseSettings):
     database_name: str = Field(default="chat_app")
     max_pool_size: int = 10
     min_pool_size: int = 1
+    test_database_url: str = Field(default="mongodb://localhost:27017")
+    test_database_name: str = Field(default="test_chat_app")
+    test_mode: bool = Field(default=False)
 
     # jwt settings
     jwt_secret_key: SecretStr = Field(default="your-secret-key")

chatApp/config/database.py

@@ -16,32 +16,46 @@
 
 
 class MongoDB:
-    def __init__(self) -> None:
+    def __init__(self, test_db: bool = False) -> None:
         self.db_client: AsyncIOMotorClient | None = None
         self.db: AsyncIOMotorDatabase | None = None
         self.users_collection: AsyncIOMotorCollection | None = None
         self.messages_collection: AsyncIOMotorCollection | None = None
         self.public_rooms_collection: AsyncIOMotorCollection | None = None
         self.private_rooms_collection: AsyncIOMotorCollection | None = None
+        self.test_db: bool = test_db
 
     async def connect_to_mongodb(self) -> None:
         try:
+            db_url = (
+                settings.test_database_url
+                if self.test_db
+                else settings.database_url
+            )
+            db_name = (
+                settings.test_database_name
+                if self.test_db
+                else settings.database_name
+            )
+
             self.db_client = AsyncIOMotorClient(
-                settings.database_url,
+                db_url,
                 maxPoolSize=settings.max_pool_size,
                 minPoolSize=settings.min_pool_size,
             )
 
             assert self.db_client is not None
-            self.db = self.db_client[settings.database_name]
+            self.db = self.db_client[db_name]
             assert self.db is not None
 
             # Define collections and schema validations
             await self.create_collections()
 
             # Ping the server to validate the connection
             await self.db_client.admin.command("ismaster")
-            logger.info("Connected to MongoDB")
+            logger.info(
+                f"Connected to MongoDB {'test' if self.test_db else ''} database"
+            )
         except Exception as e:
             logger.error(f"Could not connect to MongoDB: {e}")
             raise
@@ -196,21 +210,23 @@ async def close_mongodb_connection(self) -> None:
             self.db_client.close()
             logger.info("Closed MongoDB connection")
 
+    async def drop_database(self) -> None:
+        if self.db_client and self.db is not None:
+            await self.db_client.drop_database(self.db.name)
+            logger.info(f"Dropped database {self.db.name}")
+
 
 mongo_db = None
 
 
-async def init_mongo_db():
+async def init_mongo_db(test_db: bool = False) -> MongoDB:
     global mongo_db
-    mongo_db = MongoDB()
+    mongo_db = MongoDB(test_db=test_db)
     await mongo_db.connect_to_mongodb()
     return mongo_db
 
 
-async def shutdown_mongo_db():
-    """
-    Close the MongoDB connection.
-    """
+async def shutdown_mongo_db() -> None:
     global mongo_db
     if mongo_db is not None:
         await mongo_db.close_mongodb_connection()

chatApp/main.py

@@ -1,3 +1,6 @@
+from collections.abc import AsyncIterator
+from contextlib import asynccontextmanager
+
 import uvicorn
 from fastapi import FastAPI
 from fastapi.middleware.cors import CORSMiddleware
@@ -13,13 +16,22 @@
 settings = get_settings()
 
 
+@asynccontextmanager
+async def lifespan(app: FastAPI) -> AsyncIterator[None]:
+    # This function will be called on startup and shutdown
+    await init_mongo_db(test_db=settings.test_mode)
+    try:
+        yield
+    finally:
+        await shutdown_mongo_db()
+
+
 # Create a FastAPI app instance
 app = FastAPI(
     title="FastAPI Chat App",
     description="A chat application built with FastAPI and socket.io",
     version="1.0.0",
-    on_startup=[init_mongo_db],
-    on_shutdown=[shutdown_mongo_db],
+    lifespan=lifespan,
 )
 
 ### Add middlewares ###

chatApp/models/user.py

@@ -5,8 +5,8 @@
 from motor.motor_asyncio import AsyncIOMotorCursor
 from pydantic import BaseModel, Field
 
-from chatApp.config import auth
 from chatApp.config.database import get_users_collection
+from chatApp.utils import hasher
 from chatApp.utils.object_id import PydanticObjectId
 
 
@@ -65,7 +65,7 @@ async def create_user(user_dict: dict[str, Any]) -> UserInDB:
     user_dict["created_at"] = datetime.now()
     user_dict["updated_at"] = datetime.now()
     user_dict["last_login"] = datetime.now()
-    user_dict["hashed_password"] = auth.get_password_hash(
+    user_dict["hashed_password"] = hasher.get_password_hash(
         user_dict["password"]
     )
 

chatApp/utils/hasher.py

@@ -0,0 +1,33 @@
+from fastapi.security import OAuth2PasswordBearer
+from passlib.context import CryptContext
+
+from chatApp.config.config import get_settings
+
+settings = get_settings()
+
+# Password hashing context
+pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
+
+# OAuth2 scheme
+oauth2_scheme = OAuth2PasswordBearer(tokenUrl="auth/token")
+
+
+def verify_password(plain_password: str, hashed_password: str) -> bool:
+    """
+    Verify if the provided password matches the stored hashed password.
+
+    :param plain_password: The plain text password.
+    :param hashed_password: The hashed password stored in the database.
+    :return: True if passwords match, otherwise False.
+    """
+    return pwd_context.verify(plain_password, hashed_password)
+
+
+def get_password_hash(password: str) -> str:
+    """
+    Hash the given password using the password hashing context.
+
+    :param password: The plain text password to hash.
+    :return: The hashed password.
+    """
+    return pwd_context.hash(password)

pytest.ini

@@ -1,2 +1,3 @@
 [pytest]
 asyncio_mode = auto
+addopts = -p no:warnings -vv

tests/unit/conftest.py

@@ -0,0 +1,64 @@
+import pytest
+
+from chatApp.config import database
+from chatApp.config.database import mongo_db
+
+
+@pytest.fixture(scope="session")
+async def db():
+    # Initialize the test database
+    global mongo_db
+    print(f"mongodb is {mongo_db}")
+    mongo_db = await database.init_mongo_db(test_db=True)
+    yield mongo_db
+    # Clean up the test database
+    await database.shutdown_mongo_db()
+
+
+@pytest.fixture
+async def users_collection(db):
+    return db.users_collection
+
+
+@pytest.fixture
+async def messages_collection(db):
+    return db.messages_collection
+
+
+@pytest.fixture
+async def public_rooms_collection(db):
+    return db.public_rooms_collection
+
+
+@pytest.fixture
+async def private_rooms_collection(db):
+    return db.private_rooms_collection
+
+
+@pytest.fixture
+async def test_user():
+    return {
+        "username": "test_user",
+        "email": "test@test.com",
+        "password": "test_password",
+    }
+
+
+@pytest.fixture
+async def test_room():
+    return {"name": "test_room"}
+
+
+@pytest.fixture
+async def test_message():
+    return {"sender": "test_user", "text": "test_message"}
+
+
+@pytest.fixture
+async def test_private_room():
+    return {"name": "test_private_room", "users": ["test_user"]}
+
+
+@pytest.fixture
+async def test_public_room():
+    return {"name": "test_public_room"}