feat: add pull request workflow for automated Emacs tests

.github/workflows/tests.yml

@@ -0,0 +1,37 @@
+name: tests
+
+on:
+  pull_request:
+    types:
+      - opened
+      - reopened
+      - synchronize
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        emacs_version:
+          - "29.1"
+          - "30.1"
+
+    steps:
+      - uses: actions/checkout@v6
+
+      - name: Set up Emacs
+        uses: purcell/setup-emacs@master
+        with:
+          version: ${{ matrix.emacs_version }}
+
+      - name: Install ripgrep
+        run: sudo apt-get update && sudo apt-get install -y ripgrep
+
+      - name: Show tool versions
+        run: |
+          emacs --version
+          rg --version
+
+      - name: Run all tests
+        run: emacs --batch -Q --eval "(setq load-prefer-newer t)" -L . -l tests/run-tests.el

tests/run-tests.el

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+;;; run-tests.el --- Load and run all Grove tests -*- lexical-binding: t -*-
+
+;; Copyright 2026 Guilherme Thomazi Bonicontro
+
+;;; Commentary:
+
+;; Loads every *-test.el file in this directory, then runs the full ERT suite.
+
+;;; Code:
+
+(require 'ert)
+
+(let* ((this-file (or load-file-name buffer-file-name))
+       (tests-directory (file-name-directory this-file)))
+  (dolist (file (directory-files tests-directory t "-test\\.el\\'"))
+    (load file nil 'nomessage)))
+
+(ert-run-tests-batch-and-exit)
+
+;;; run-tests.el ends here