Add Babel e2e test

.github/workflows/e2e-tests.yml

@@ -0,0 +1,66 @@
+name: E2E tests
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  prettier:
+    name: Prettier
+    runs-on: ubuntu-latest
+    steps:
+      - name: Setup Node.js
+        uses: actions/setup-node@v3
+
+      - name: Checkout
+        uses: actions/checkout@v3
+        with:
+          path: jest-light-runner
+
+      - name: Checkout "prettier"
+        uses: actions/checkout@v3
+        with:
+          repository: prettier/prettier
+          ref: next
+          path: prettier
+
+      - name: Run tests
+        run: |
+          cd prettier
+          yarn install --frozen-lockfile
+          yarn upgrade jest-light-runner@file:../jest-light-runner
+          yarn test:format
+
+  babel:
+    name: Babel
+    runs-on: ubuntu-latest
+    steps:
+      - name: Setup Node.js
+        uses: actions/setup-node@v3
+
+      - name: Checkout
+        uses: actions/checkout@v3
+        with:
+          path: jest-light-runner
+
+      - name: Checkout "babel"
+        uses: actions/checkout@v3
+        with:
+          repository: babel/babel
+          path: babel
+
+      - name: Build
+        run: |
+          yarn install --frozen-lockfile
+          make build-no-bundle
+        working-directory: babel
+
+      - name: Update jest-light-runner
+        run: |
+          yarn up jest-light-runner@file:../jest-light-runner
+        working-directory: babel
+
+      - name: Test
+        run: |
+          yarn jest babel-core babel-preset-env
+        working-directory: babel

README.md

@@ -65,7 +65,7 @@ You can specify custom ESM loaders using Node.js's [`--loader`](https://nodejs.o
 
 This project follows semver, and it's currently in the `0.x` release line.
 
-It is used to run tests in the [`babel/babel`](https://github.com/babel/babel/) repository, but there are no tests for the runner itself. I would gladly accept a pull requests adding a test infrastructure!
+It is used to run tests in the [`babel/babel`](https://github.com/babel/babel/) and [`prettier/prettier`](https://github.com/prettier/prettier/) repositories, but there are no internal tests for the runner itself. I would gladly accept a pull requests adding a test infrastructure!
 
 ## Donations