chore: run tests in both legacy and concurrent mode on the CI

Author: mdjastrzebski

.github/workflows/ci.yml

@@ -61,6 +61,23 @@ jobs:
       - name: Upload coverage to Codecov
         uses: codecov/codecov-action@v4
 
+      - name: Test in concurrent mode
+        run: CONCURRENT_MODE=1 yarn test:ci
+
+  test-concurrent:
+    needs: [install-cache-deps]
+    runs-on: ubuntu-latest
+    name: Test
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js and deps
+        uses: ./.github/actions/setup-deps
+
+      - name: Test in concurrent mode
+        run: CONCURRENT_MODE=1 yarn test:ci
+
   test-website:
     runs-on: ubuntu-latest
     name: Test Website

jest-setup.ts

@@ -1,6 +1,9 @@
-import { resetToDefaults } from './src/pure';
+import { resetToDefaults, configure } from './src/pure';
 import './src/matchers/extend-expect';
 
 beforeEach(() => {
   resetToDefaults();
+  if (process.env.CONCURRENT_MODE === '1') {
+    configure({ concurrentRoot: true });
+  }
 });