Python Testing (Lightweight)

Overview

Tests prove features work. Coverage is secondary. E2e tests beat unit tests. Real beats mocked.

Philosophy

• Trustworthiness > coverage. A test that mocks away the tested thing proves nothing.
• 5 good e2e tests > 100 unit tests with heavy mocking.
• 20/80 rule. Test where it gives the most confidence.
• Unit tests for pure logic only. Functions that transform data honestly.
• Real over mocked. Real HTTP servers (pytest-httpserver), real tmp dirs, real processes.

Test Priority