added simple CI test

.github/workflows/ci-tests.yml

@@ -0,0 +1,25 @@
+# This workflow will install Python dependencies, run tests and lint with a variety of Python versions
+# For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions
+
+name: CI
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out repository code
+        uses: actions/checkout@v2
+      - name: Install cmocka
+        run: |
+          sudo apt-get update
+          sudo apt-get install libcmocka-dev
+      - name: make
+        run: make
+      - name: make check
+        run: make check

makefile

@@ -29,3 +29,6 @@ $(MQTT_C_UNITTESTS): tests.c $(MQTT_C_SOURCES)
 
 clean:
 	rm -rf $(BINDIR)
+
+check: all
+	./$(MQTT_C_UNITTESTS)