This Tampermonkey script adds a custom "Run Tests" button to GitHub Pull Request (PR) pages. When clicked, it automatically adds a comment saying "run tests" to the PR. This is especially useful for teams using comment-based triggers for CI/CD workflows or testing pipelines.

github-run-tests-button.user.js

// ==UserScript==
// @name         Add "Run Tests" Button to GitHub PRs
// @namespace    https://github.com/
// @version      1.0
// @description  Adds a button to GitHub PRs to comment "run tests"
// @author       Your Name
// @match        https://github.com/*/pull/*
// @grant        none
// @downloadURL  https://gist.githubusercontent.com/<your-username>/<gist-id>/raw/run-tests-button.user.js
// @updateURL    https://gist.githubusercontent.com/<your-username>/<gist-id>/raw/run-tests-button.user.js
// ==/UserScript==

(function() {
    'use strict';

    // Check if on a PR page
    if (!document.querySelector('div[aria-label="Pull request"]')) return;

    // Create the button
    const runTestsButton = document.createElement('button');
    runTestsButton.innerText = 'Run Tests';
    runTestsButton.style = `
        background-color: #2ea44f;
        color: white;
        border: none;
        border-radius: 6px;
        padding: 5px 10px;
        cursor: pointer;
        font-size: 14px;
        margin-left: 10px;
    `;

    // Append button to the toolbar
    const toolbar = document.querySelector('.gh-header-actions');
    if (toolbar) {
        toolbar.appendChild(runTestsButton);
    }

    // Add event listener to the button
    runTestsButton.addEventListener('click', async () => {
        const commentBox = document.querySelector('#new_comment_field');
        const submitButton = document.querySelector('button[name="comment_and_close"]') || document.querySelector('button[data-edit-text="Comment"]');
        
        if (commentBox && submitButton) {
            commentBox.value = 'run tests'; // Add the comment
            submitButton.click();          // Submit the comment
            alert('Comment added: "run tests"');
        } else {
            alert('Could not find the comment box or submit button.');
        }
    });
})();