Agent skill · software engineering · aiskillstore
backend-testing
Write comprehensive backend tests including unit tests, integration tests, and API tests. Use when testing REST APIs, database operations, authentication flows, or business logic. Handles Jest, Pytest, Mocha, testing strategies, mocking, and test coverage.
Why this skill is useful
Provides specific testing strategies and configurations for various backend frameworks and tools that the AI wouldn't reliably generate on its own.
What it needs
Requires jest, mocha, pytest, supertest installed locally. About 8k tokens when loaded. Last updated 2026-08-07. 405 stars on the source repository.
What this skill does
Backend Testing When to use this skill Specific situations that should trigger this skill: New feature development: Write tests first using TDD (Test-Driven Development) Adding API endpoints: Test success and failure cases for REST APIs Bug fixes: Add tests to prevent regressions Before refactoring: Write tests that guarantee existing behavior CI/CD setup: Build automated test pipelines Input Format Format and required/optional information to collect from the user: Required information Framework: Express, Django, FastAPI, Spring Boot, etc. Test tool: Jest, Pytest, Mocha/Chai, JUnit, etc. Test target: API endpoints, business logic, DB operations, etc. Optional information Database: PostgreSQL, MySQL, MongoDB (default: in-memory DB) Mocking library: jest.mock, sinon, unittest.mock (default: framework built-in) Coverage target: 80%, 90%, etc. (default: 80%) E2E tool: Supertest, TestClient, RestAssured (optional) Input example Instructions Step-by-step task order to follow precisely. Step 1: Set up the test environment Install and configure the test framework and tools. Tasks: Install test libraries Configure test database (in-memory or separate DB) Separate environment variables (.env.test) Configure jest.config.js or pytest.ini Example (Node.js + Jest + Supertest): jest.config.js: setup.ts (global test configuration): Step 2: Write Unit Tests (business logic) Write unit tests for individual functions and classes. Tasks: Test pure functions (no dependencies) Isolate dependencies via mocking Test edge cases (boundary values, exceptions) AAA pattern (Arrange-Act-Assert) Decision criteria: No external dependencies (DB, API) -> pure Unit Test External dependencies present -> use Mock/Stub Complex logic -> test various input cases Example (password validation function): Step 3: Integration Test (API endpoints) Write integration tests for API endpoints. …
How to use it
Reference it in AdaL, Claude Code, Cursor or any coding agent — nothing to install:
@skills aiskillstore/backend-testing