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TestDriver Screen Assertion Guide

A reference skill teaching Claude how to verify screen state in plain English with TestDriver's AI assert().

Dev & CodingIntermediate★ 243⑂ 37AI score 6/10Last updated: Sep 21, 2026

What it does

  • Teaches Claude the exact syntax for testdriver.assert('the login page is displayed') to verify UI state in natural language.
  • Documents parameters (assertion string, ai.temperature, top.p/k sampling overrides) and the return contract (Promise<boolean>, throws on failure).
  • Includes best practices (be specific, not vague), before/after state-change assertion patterns, and a waitForAssertion polling helper for conditions that need time.
  • Ships a full Vitest example covering auth → connect → assert → disconnect.

Who it's for

  • QA engineers and frontend devs writing UI/E2E tests with TestDriver.ai
  • Teams tired of brittle selector-based tests who want visual/semantic checks
  • Anyone embedding AI assertions inside existing Vitest/Jest suites

Examples

  1. "Write a test that checks required-field errors when submitting an empty form" → generates per-field assert chains
  2. "Wait until more than 10 items load after clicking load more" → applies the waitForAssertion(...) polling pattern
  3. "Verify active/completed state for each step of a 3-step wizard" → step-by-step assertion sequence

· · · Install guide · · ·

Try it now, no install

Paste this into Claude to use the skill without installing anything.

Read the instructions in this file and follow them to help me:
https://raw.githubusercontent.com/testdriverai/testdriverai/HEAD/ai/skills/testdriver-assert/SKILL.md

What I want: (describe your task here)

If Claude can't open the link, open it yourself and paste the contents instead.

↓ If it works for you, download the ZIP below and install it. Then it runs on its own — no pasting each time.

Install in the Claude app (no terminal)
  1. Download the ZIP with the button below.
  2. In Claude, open Settings → Capabilities and turn on 'Code execution and file creation'. (one time)
  3. Go to Customize → Skills → + → 'Upload a skill' and upload the ZIP.
↓ Download ZIP
Install in Claude Code

Let Claude do it — paste this into Claude Code

Install the skill I found on Claude Skill Mart.
Copy the ai/skills/testdriver-assert folder from the GitHub repo testdriverai/testdriverai into my ~/.claude/skills/testdriver-assert/.
When it's done, tell me in one line what this skill can do.

Install with a command instead

git clone https://github.com/testdriverai/testdriverai.git /tmp/testdriverai && mkdir -p ~/.claude/skills/testdriver-assert && cp -r /tmp/testdriverai/ai/skills/testdriver-assert/* ~/.claude/skills/testdriver-assert/

⚠ This is a third-party skill. Check the source repository before installing.

  1. Open a terminal.
  2. Clone the repo: git clone https://github.com/testdriverai/testdriverai.git /tmp/testdriverai
  3. Create the skill folder: mkdir -p ~/.claude/skills/testdriver-assert
  4. Copy the skill files: cp -r /tmp/testdriverai/ai/skills/testdriver-assert/* ~/.claude/skills/testdriver-assert/
  5. Install the runtime package in your project: npm i -D testdriverai
  6. Export your API key: export TD_API_KEY=your_key
  7. Restart Claude Code and ask something like "write a login verification test using testdriver assert".
View source on GitHub ↗