Add snapshot tests workflow

This workflow only triggers when the auto-pr script or the snapshot test directory changes

Author: x0rw

.github/auto-pr-tests/test_runner.py

@@ -38,9 +38,9 @@ def compare(issue_json_path: Path, snapshot_path: Path) -> bool:
         print(f"{issue_json_path.name} matches snapshot.")
         return True
 
-# to generate snapshot i use this command:
-# create or change the test_issue_xx file
-## `cat .github/auto-pr-tests/test_issue_XX.json | python3 scripts/auto-pr-helper.py 2&>/dev/null > .github/auto-pr-tests/test_issue_0XX.snapshot`
+# to generate snapshot:
+# create or change the test_issue_xx file and then use this command after replacing XX with your test number:
+## `cat .github/auto-pr-tests/test_issue_XX.json | uv run python scripts/auto-pr-helper.py 2&>/dev/null > .github/auto-pr-tests/test_issue_0XX.snapshot`
 tests = {
     "test_01": (
         Path(".github/auto-pr-tests/test_issue_01.json"),

.github/workflows/snapshot-ci.yml

@@ -0,0 +1,25 @@
+name: Snapshot Tests for auto-pr
+
+on:
+  push:
+    paths:
+      - 'scripts/auto-pr-helper.py'
+      - '.github/auto-pr-tests/**'
+  workflow_dispatch:      # also allow manual runs
+
+jobs:
+  snapshot-test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out code
+        uses: actions/checkout@v4
+
+      - name: Install uv
+        shell: bash
+        run: |
+          curl -LsSf https://astral.sh/uv/install.sh | sh
+          echo "$HOME/.cargo/bin" >> $GITHUB_PATH
+
+      - name: Run snapshot tests
+        run: |
+          uv run python .github/auto-pr-tests/test_runner.py