Add test database configuration and schema creation for testing

app/config.py

@@ -33,6 +33,8 @@ class Settings(BaseSettings):
     POSTGRES_PASSWORD: str
     POSTGRES_HOST: str
     POSTGRES_DB: str
+    POSTGRES_TEST_USER: str
+    POSTGRES_TEST_DB: str
 
     @computed_field
     @property
@@ -80,6 +82,17 @@ class Settings(BaseSettings):
             path=self.POSTGRES_DB,
         )
 
+    @computed_field
+    @property
+    def test_asyncpg_url(self) -> PostgresDsn:
+        return MultiHostUrl.build(
+            scheme="postgresql+asyncpg",
+            username=self.POSTGRES_USER,
+            password=self.POSTGRES_PASSWORD,
+            host=self.POSTGRES_HOST,
+            path=self.POSTGRES_TEST_DB,
+        )
+
     @computed_field
     @property
     def postgres_url(self) -> PostgresDsn:

app/database.py

@@ -15,6 +15,12 @@ engine = create_async_engine(
     echo=True,
 )
 
+test_engine = create_async_engine(
+    global_settings.test_asyncpg_url.unicode_string(),
+    future=True,
+    echo=True,
+)
+
 # expire_on_commit=False will prevent attributes from being expired
 # after commit.
 AsyncSessionFactory = async_sessionmaker(
@@ -23,6 +29,12 @@ AsyncSessionFactory = async_sessionmaker(
     expire_on_commit=False,
 )
 
+TestAsyncSessionFactory = async_sessionmaker(
+    test_engine,
+    autoflush=False,
+    expire_on_commit=False,
+)
+
 
 # Dependency
 async def get_db() -> AsyncGenerator:
@@ -38,3 +50,18 @@ async def get_db() -> AsyncGenerator:
             if not isinstance(ex, ResponseValidationError):
                 await logger.aerror(f"Database-related error: {repr(ex)}")
             raise  # Re-raise to be handled by appropriate handlers
+
+
+async def get_test_db() -> AsyncGenerator:
+    async with TestAsyncSessionFactory() as session:
+        try:
+            yield session
+            await session.commit()
+        except SQLAlchemyError:
+            # Re-raise SQLAlchemy errors to be handled by the global handler
+            raise
+        except Exception as ex:
+            # Only log actual database-related issues, not response validation
+            if not isinstance(ex, ResponseValidationError):
+                await logger.aerror(f"Database-related error: {repr(ex)}")
+            raise  # Re-raise to be handled by appropriate handlers