Test ESP-IDF with PIO Unit Testing

.github/workflows/examples.yml

@@ -45,4 +45,5 @@ jobs:
           pio pkg install --global --platform symlink://.
       - name: Build examples
         run: |
-          platformio run -d ${{ matrix.example }}
+          pio run -d ${{ matrix.example }}
+          pio test -d "examples/espidf-hello-world" -e esp32dev --without-uploading --without-testing

examples/espidf-hello-world/test/test_dummy/test_dummy.c

@@ -0,0 +1,15 @@
+#include <unity.h>
+
+void test_dummy(void)
+{
+  TEST_ASSERT_EQUAL(1, 1);
+}
+
+void app_main()
+{
+  UNITY_BEGIN();
+
+  RUN_TEST(test_dummy);
+
+  UNITY_END();
+}