Add a simple unit test for widget_add_from_file()

unittest/test_widget.c

@@ -1,6 +1,7 @@
 #include "test.h"
+#include "widget.h"
 
-int test_widget() {
+/*
   char *json;
   void *h = NULL;
   struct json_token key, val;
@@ -25,4 +26,26 @@ int test_widget() {
 exit:
   free(json);
   return 0;
+*/
+
+static int test_widget_add_from_file(void) {
+  struct widget_t *w;
+  const char *fn = "data/TestWidget.json";
+
+  w = widget_add_from_file(fn, 0, NULL, NULL);
+  if (!w) {
+    LOG(LL_ERROR, ("Could not add %s", fn));
+    return -1;
+  }
+  if (16 != w->x || 48 != w->w || 16 != w->y || 48 != w->h) {
+    LOG(LL_ERROR, ("widget x, y, w, h incorrect"));
+    return -1;
+  }
+
+  return 0;
+}
+
+int test_widget() {
+  test_widget_add_from_file();
+  return 0;
 }