chore: Update CircleCI to run examples (#557)

* chore: Update CircleCI to run examples

* chore: loop through each example and run test

* fix: switch to using yarn instead of npm

* Update .circleci/config.yml

Co-authored-by: Michał Pierzchała <thymikee@gmail.com>

.circleci/config.yml

@@ -65,6 +65,13 @@ jobs:
           at: ~/react-native-testing-library
       - run: |
           cd website && yarn install && yarn build
+  test-examples:
+    <<: *defaults
+    steps:
+      - attach_workspace:
+          at: ~/react-native-testing-library
+      - run: |
+          ls -d ./examples/* | xargs -I {} bash -c "cd '{}' && yarn install && yarn test"
   deploy-website:
     <<: *defaults
     steps:
@@ -96,6 +103,10 @@ workflows:
             - install-dependencies
           # docusuarus build is running when deploying website as well
           filters: *filter-ignore-master
+      - test-examples:
+          requires:
+            - install-dependencies
+          filters: *filter-only-master
       - deploy-website:
           requires:
             - install-dependencies