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    Unit & Integration Test Generator — Write Tests That Actually Catch Bugs (Edge Cases, Error Paths, Mocks)

    Unit & Integration Test Generator — Write Tests That Actually Catch Bugs (Edge Cases, Error Paths, Mocks)

    by PubsProToolkit

    Generate a real test suite for any function, module, or file — meaningful edge cases, error paths, boundary conditions, and proper mocks, not happy-path stubs. Detects your project's framework and conventions, plans the cases deliberately before writing, and hands back runnable tests plus a summary of what's covered. Built to write the tests that actually catch bugs.

    Updated Jun 2026
    Security scanned
    Works with Claude Code

    $12

    · or 60 credits

    30-day refund guarantee

    Secure checkout via Stripe

    Included in download

    • Generate a unit test suite for a function or module you just wrote.
    • Backfill tests on untested or legacy code before refactoring it.
    • Ready for Works with Claude Code
    • Instant install

    Sample input

    Write tests for this parse_discount(code, cart_total) function — it returns a discount amount and raises on unknown codes.

    Sample output

    A test plan first (valid code applies the discount; zero and negative cart_total; unknown and empty code raise; very large total rounding; discount never exceeds the total), then a runnable pytest file with parametrized cases, the clock/DB mocked, and assertions on both return values and raised errors — plus a flag: "confirm whether expired codes should error or silently no-op (business rule I can't infer)."

    About This Skill

    A generated test suite is only worth anything if its tests can actually fail for a real reason. This skill writes those — not coverage-padding stubs that mirror the implementation and break on every refactor. It runs an ordered pass: • Understands the target — inputs, outputs, side effects, dependencies, error conditions, the contract • Detects your framework and conventions — pytest, unittest, Jest, Vitest, JUnit, Go testing, RSpec — and matches your repo's style • Enumerates the cases first — happy path, edge/boundary, error paths, side effects, integration points (shown as a test plan) • Writes clear arrange-act-assert tests — descriptive, isolated, deterministic, with external dependencies mocked properly • Covers the failure modes — the untested error handling where real bugs hide • Adds integration tests where they earn their place • Makes them runnable, with the command to run them You get the test file(s) in your framework plus a coverage summary, including any cases that need domain knowledge it can't infer (flagged, not guessed). It writes tests — it doesn't judge whether an existing suite is adequate; pair it with a test-coverage gate for that.

    Use Cases

    • Generate a unit test suite for a function or module you just wrote.
    • Backfill tests on untested or legacy code before refactoring it.
    • Add integration tests for a key flow across multiple units.
    • Cover the edge cases and error paths a quick pass would miss.

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    Security Scanned

    Passed automated security review

    Permissions

    No special permissions declared or detected

    Tags

    tdd
    pytest
    jest
    code-quality
    unit-testing
    integration-testing
    test-generator
    test-coverage
    claude-code
    cursor

    Works with Claude Code, Cursor, Codex CLI, Gemini CLI, and other SKILL.md-compatible agents. Framework-aware across pytest, unittest, Jest, Vitest, JUnit, Go testing, RSpec, and more.

    Creator

    PubsProToolkit

    PubsProToolkit builds adversarial "gate" skills for AI agents — they catch problems before your output ships, instead of just generating more. From code, security, and infrastructure to content, hiring, contracts, and finance. Built by a CMPP-certified, PhD medical writer who brings regulated-industry rigor to every domain.

    Frequently Asked Questions

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