First start of MQTT buttons

unittest/data/TestWidget-MQTT.json

@@ -0,0 +1,10 @@
+{
+  "name": "heli_led_on",
+  "x": 240,
+  "y": 36,
+  "w": 64,
+  "h": 56,
+  "label": "On",
+  "type": 1,
+  "mqtt": [ "/topic1 Hello", "/topic2 World" ]
+}

unittest/data/TestWidget.json

@@ -5,6 +5,6 @@
   "w": 48,
   "h": 48,
   "label": "One",
-  "type": 0
+  "type": 0,
   "img": "/some/file.ext"
 }

unittest/main.c

@@ -5,6 +5,7 @@ int assert_count=0;
 
 int main() {
   test_widget();
+  test_widget_mqtt();
   test_screen();
 
   if (test_failures) {

unittest/test.h

@@ -21,6 +21,7 @@ extern int assert_count;
 
 
 int test_widget(void);
+int test_widget_mqtt(void);
 int test_screen(void);
 
 #endif // __TEST_H

unittest/test_widget.c

@@ -71,3 +71,15 @@ int test_widget() {
 
   return 0;
 }
+
+int test_widget_mqtt() {
+  struct widget_t *w;
+
+  char *fn = "data/TestWidget-MQTT.json";
+  LOG(LL_INFO, ("widget_create_from_file(%s)", fn));
+  w = widget_create_from_file(fn);
+  ASSERT(w, "widget_create_from_file()");
+  ASSERT(w->x == 240, "'x' field is invalid");
+  ASSERT(w->type == WIDGET_TYPE_MQTT_BUTTON, "'type' field is not WIDGET_TYPE_MQTT_BUTTON");
+  return 0;
+}