Automatic jest test generation for GitHub PRs with dual AI review

Workflow: Automatic Unit Test Creator from GitHub

🏗️ Architecture Overview This workflow listens for GitHub pull-request events, analyzes changed React/TypeScript files, auto-generates Jest tests via AI, has them reviewed by a second AI pass, and posts suggestions back as PR comments:

1. GitHub Webhook → PR opened or updated 2. Fetch & Diff → Retrieve raw diff of changed files 3. Filter & Split → Isolate .tsx files & their diffs 4. Fetch File Contents → Provide full context for tests 5. Test Maker Agent → Generate Jest tests for diff hunks 6. Code Reviewer Agent → Refine tests for style & edge-cases 7. Post PR Comment → Sends suggested tests back to GitHub

📦 Node-by-Node Breakdown

mermaid flowchart LR A[Webhook: /github/pr-events] --> B[GitHub: Get PR] B --> C[Function: Parse diffurl + owner/repo] C --> D[HTTP Request: GET diffurl] D --> E[Function: Split on "diff --git"] E --> F[Filter: /\.tsx$/] F --> G[GitHub: Get File Contents] G --> H[Test Maker Agent] H --> I[Code Reviewer Agent] I --> J[Function: Build Comment Payload] J --> K[HTTP Request: POST to PR Comments]

Webhook: GitHub PR Events - Type: HTTP Webhook (/webhook/github/pr-events) - Subscribed Events: pullrequest.opened, pullrequest.synchronize

GitHub: Get PR - Node: GitHub - Action: "Get Pull Request" - Inputs: owner, repo, pullnumber

Function: Parse diffurl + owner/repo - Extracts: - diffurl (e.g. …/pulls/123.diff) - owner, repo, mergecommitsha