fix(mdns): Host test with IDFv5.1

.github/workflows/host-test.yml

@@ -3,8 +3,8 @@ name: Host test
 on: [push, pull_request]
 
 jobs:
-  host_test:
-    name: Build and Test on Host
+  host_test_esp_modem:
+    name: esp-modem Build and Test on Host
     runs-on: ubuntu-20.04
     container: espressif/idf:release-v4.3
     env:
@@ -38,3 +38,23 @@ jobs:
         if: always()
         with:
           files: esp-protocols/components/esp_modem/test/host_test/junit.xml
+
+  host_test_mdns:
+    name: mdns Build and Test on Host
+    runs-on: ubuntu-20.04
+    container: espressif/idf:latest
+
+    steps:
+      - name: Checkout esp-protocols
+        uses: actions/checkout@master
+        with:
+          path: esp-protocols
+
+      - name: Build and Test
+        shell: bash
+        run: |
+          apt-get update && apt-get install -y dnsutils gcc g++
+          . ${IDF_PATH}/export.sh
+          cd $GITHUB_WORKSPACE/esp-protocols/components/mdns/tests/host_test
+          idf.py build
+          ./build/mdns_host.elf & dig +short -p 5353 @224.0.0.251 myesp.local