Intermediate
Best Gemini Prompt for Tests & Docs
Why Gemini?
Gemini generates comprehensive test suites and accurate documentation by reading actual implementation code — ensuring tests cover real edge cases and docs reflect the true API behavior, not assumptions.
Prompt Template
Generate {output_type} for the following code.\n\nOutput requested: {output_type} (unit tests / integration tests / JSDoc/docstring / README section / API reference / all of the above)\n\nLanguage / framework: {language_framework}\nTest framework (if applicable): {test_framework} (e.g., Jest, pytest, JUnit)\n\nCode to document/test:\n{code}\n\nAdditional context:\n- How this code is used by callers: {usage_context}\n- Known edge cases I'm aware of: {known_edge_cases}\n- External dependencies to mock: {dependencies_to_mock}\n\nFor tests, ensure coverage of:\n1. Happy path (expected inputs)\n2. Boundary conditions\n3. Invalid / malformed inputs\n4. Error and exception paths\n5. Any async behavior or side effects\n\nFor documentation, include:\n1. Purpose and when to use this\n2. Parameters with types and constraints\n3. Return value and possible exceptions\n4. Usage examples (at least 2, one simple and one edge case)\n5. Performance or security notes if relevant Example Output
Tests generated: test_happy_path_usd_charge, test_zero_amount_raises_ValueError, test_negative_amount_raises_ValueError, test_currency_mismatch_raises_CurrencyError, test_stripe_timeout_retries_3x, test_idempotency_key_passed_to_stripe. Docstring includes Args/Returns/Raises/Examples with copy-paste runnable example.
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Tips for Better Results
Paste the actual implementation — Gemini reads your real variable names, exception types, and return shapes to write tests that compile without manual editing. Specify your exact pytest version to get compatible fixture syntax.
Example (filled in)
Unit tests + docstrings, Python 3.11, pytest, [payment processing function pasted], Called by checkout service, Zero amount / negative amount / currency mismatch, Stripe API client