smoketest-writing

Isolated FastAPI smoketests use ephemeral Docker PostgreSQL containers and FastAPI's TestClient to avoid touching the development database. The approach scaffolds conftest.py fixtures and test runners with dependency injection overrides to route database sessions to the temporary test database.

Migrating real-server FastAPI tests to isolated TestClient-backed tests involves scaffolding conftest.py fixtures, overriding get_session or get_dbagent dependencies, and executing tests against an ephemeral Docker PostgreSQL container with proper teardown within a structured workspace.

FastAPI TestClient works with Docker PostgreSQL for integration testing by spinning up an ephemeral PostgreSQL container, overriding dependency injection to point to the test database, and ensuring proper teardown after the test suite completes.

Setting up pytest fixtures for FastAPI smoketests requires creating a conftest.py file with dependency injection overrides for get_session, configuring an ephemeral Docker PostgreSQL instance, and defining a test runner script to manage the container lifecycle and teardown.

Dependency injection in FastAPI smoketests overrides functions like get_session or get_dbagent to route database queries to an ephemeral Docker PostgreSQL test database, ensuring true isolation from the development database during integration and smoke testing.

Scaffolding integration tests for a FastAPI project with Docker PostgreSQL requires creating a test-db.sh script, configuring conftest.py fixtures, setting up test runner scripts, and applying dependency injection overrides to ensure isolated TestClient-backed test execution.