# Test Me > Write the automated unit and feature tests that /verify-me identified as missing, following this project's testing conventions and real testing best practices. Actively filters out useless tests — ones that can't fail, test the framework instead of the feature, or lock in implementation details instead of behavior. After writing each test (or batch of tests), explains in plain language why it's useful and what real bug or rule it protects against. Use after /verify-me, once you know what tests are missing and want them actually written. - Skill: `kerliula/test-me` (Agent Skill) - Install (CLI): `npx skillmds@latest add kerliula/test-me` - Raw SKILL.md: https://api.skillmd.com/api/skills/kerliula/test-me/raw - Safety review: pending - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: Coding & Dev Tools - Author: Kerliula (https://skillmd.com/u/kerliula) - Updated: 2026-09-17 - Page: https://skillmd.com/skills/kerliula/test-me --- # Test Me — Write Tests That Earn Their Place Your job is to write tests that would actually catch a real bug if one showed up. Not tests that exist to make a coverage number go up. A test that can never fail is worse than no test — it's false confidence. Before writing any test, you should be able to answer: **"What real mistake would this test catch?"** If you can't answer that in one sentence, don't write the test — or rewrite it until you can. --- ## Input You need the `/verify-me` output: the markdown file at `docs/verification/.md` (or wherever the developer points you). That file's "Unit tests still needed" and "Feature tests still needed" sections are your starting checklist — plus its request log, which already shows real inputs and real outputs you can turn into concrete assertions. Also read, if available, the matching `/grill-me` and `/solve-me` files — they tell you *why* a rule exists, which is exactly what makes a test meaningful instead of arbitrary. If none of these exist, ask for them or for a plain description of what needs test coverage. Don't invent test cases from guessing what the code probably does. --- ## Step 1 — Learn how this project already tests things Before writing anything, look at how existing tests in this codebase are structured: which test framework, how the database is reset between tests, how factories are used, naming conventions, folder layout (unit vs. feature), how HTTP requests are made in tests, how auth is set up in tests. Use CodeGraph or search for the closest existing test to what you're about to write. New tests should read like they were written by whoever wrote the existing ones — same style, same helpers, same conventions. Don't introduce a new testing pattern when the project already has one. --- ## Step 2 — Turn the checklist into real test cases For every item in verify-me's "tests still needed" lists, write down, in one line, the real-world rule or scenario it protects — pulling this from the grill-me/solve-me docs when possible. This becomes the test's reason to exist, and later its explanation and its name. Group the work into two batches, matching verify-me's split: - **Unit test batch** — small, isolated pieces of logic. - **Feature test batch** — real end-to-end behavior through the actual endpoints, matching what was manually proven with curl in verify-me. --- ## Step 3 — Filter out useless tests before writing them For each candidate test, check it against this list. If it matches any of these, rewrite it or drop it: - **Can't fail.** The assertion is so loose or so tied to the code's own logic that almost any change would still pass. - **Tests the framework, not the feature.** E.g. asserting that Eloquent saved a field to the database — that's proving the ORM works, not that your rule works. - **Tests implementation, not behavior.** Asserting a private method was called, an internal query ran, or an exact internal step happened — these break on harmless refactors and don't actually prove the outward behavior is correct. - **Only checks that a mock was called.** If the test sets up a mock and then asserts the mock was called the way the code calls it, it's just restating the code. Prefer using the real thing (real database, real objects) unless there's a real reason not to (external network calls, sending real emails, calling a paid API). - **Vague name, vague purpose.** Names like `test_it_works` or `test_basic_functionality` tell you nothing about what broke when it fails. A good name states the scenario and the expected outcome. - **Duplicate coverage.** If another test already proves this exact behavior, don't write a second one that just phrases it differently. A test earns its place only if you can say: "if this behavior broke, this test would turn red, and the failure message would tell someone what actually broke." --- ## Step 4 — Write the tests For each surviving test case: - Follow the Arrange → Act → Assert shape: set up real data (using factories, matching project convention), do the one thing being tested, then check the real, observable outcome — a response body and status code for feature tests, a return value or resulting state for unit tests. - Give it a name that states the scenario and the expected result in plain words (e.g. "a user cannot confirm an email change with an expired token," not "test email 2"). - One test, one behavior. If a test needs "and" to describe what it checks, it's probably two tests. - Use the project's real database setup for feature tests (whatever this project already uses to reset state between tests) instead of mocking the database. - Reuse the real inputs and outputs from the verify-me request log where they apply — they're already proven-correct examples of real behavior. - Keep tests independent — no test should depend on another test having run first or left data behind. Write one batch at a time (unit, then feature, or whatever grouping makes sense for the size of the work). After each batch, run it and confirm it passes for real — don't assume. --- ## Step 5 — Prove the important tests actually catch something For the tests protecting the most important rules (the "must always stay true" ones), do a quick sanity check: temporarily break the behavior the test is supposed to protect (comment out the check, revert the fix, whatever is fastest), run the test, and confirm it actually fails. Then put the real code back and confirm it passes again. This is the fastest way to know a test isn't just decoration. Skip it for very simple tests where it's obvious the assertion would catch a real break; do it for anything protecting a rule that matters. --- ## Step 6 — Explain why each test is useful After finishing a batch of tests (or all of them, if the batch is small), explain plainly, for each test or tight group of tests: - **What it protects** — the real rule, edge case, or bug it exists for, in plain language, naming the requirement number (R) the verify-me list tagged it with when there is one. - **What would slip through without it** — what could go wrong later (a bad refactor, a forgotten edge case) that this test would catch. - **Why it's a good test** — one line on what makes it solid: it checks real, observable behavior; it has a name that explains itself when it fails; it isn't tied to implementation details that could change without the actual behavior changing. Keep this explanation short and plain — a sentence or two per test or group, not a essay. The goal is that the developer trusts these tests without having to re-derive why each one exists. --- ## Rules - Don't write a test unless you can state the real mistake it would catch. - Don't mock things you could just use for real, unless there's a concrete reason (external/paid/slow services). - Don't assert on implementation details (private internals, exact query counts, exact call order) when asserting on the observable outcome would do. - Don't pad the count with near-duplicate tests. - Match this project's existing testing conventions over generic textbook style when the two disagree. - Don't change application code to make a test pass — if a test reveals a real bug, report it plainly instead of quietly patching around it. --- ## Done means - Every real item from verify-me's "tests still needed" lists has either been written as a genuine test or explicitly dropped with a one-line reason why it wasn't worth writing. - Every written test would visibly fail if the behavior it protects broke — spot-checked for the important ones. - Every test has a name that explains the scenario and expected result on its own. - No test only restates a mock call, tests the framework, or checks an internal implementation detail instead of real behavior. - The developer has a short, plain-language explanation of why each test (or group of tests) is useful and what it would catch.