add PR testing (#1)

Reviewed-on: https://code.forgejo.org/actions/ovh-dns-update/pulls/1
Co-authored-by: oliverpool <git@olivier.pfad.fr>
Co-committed-by: oliverpool <git@olivier.pfad.fr>

.forgejo/workflows/pr.yml

@@ -0,0 +1,37 @@
+name: pr
+
+on:
+  pull_request:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: https://code.forgejo.org/actions/setup-go@v4
+        with:
+          go-version: ">=1.21"
+          check-latest: true
+      - name: run the fake API server
+        id: test
+        run: |
+          touch delete_me_when_ready
+          # keep server running in the background
+          ACTION_TESTING=1 go test . &
+          # wait for the OVH_ENDPOINT output to be written (inotifywait not available)
+          tail --follow=name delete_me_when_ready || echo "test server is listening"
+      - name: update the record
+        uses: ./
+        with:
+          subdomain: _release
+          domain: example.org
+          record-id: 12345
+          value: v=v1.42
+          ovh-endpoint: ${{ steps.test.outputs.OVH_ENDPOINT }}
+          ovh-app-key: APP_KEY
+          ovh-app-secret: APP_SECRET
+          ovh-consumer-key: CON_KEY
+      - name: check updated record value
+        run: |
+          cat dns.txt && echo
+          grep --quiet "v=v1.42" dns.txt