Mostly empty unit tests -- added mgos_mock to be able to run unit tests on x86_64

unittest/test_widget.c

@@ -0,0 +1,28 @@
+#include "test.h"
+
+int test_widget() {
+  char *json;
+  void *h = NULL;
+  struct json_token key, val;
+  int idx;
+
+  json = json_fread("data/TestWidget.json");
+  if (!json) {
+    printf("Could not read json\n");
+    return -1;
+  }
+  
+  // Traverse Object
+  while ((h = json_next_key(json, strlen(json), h, ".", &key, &val)) != NULL) {
+    printf("[%.*s] -> [%.*s]\n", key.len, key.ptr, val.len, val.ptr);
+  }
+
+  // Traverse Array
+  while ((h = json_next_elem(json, strlen(json), h, ".widgets", &idx, &val)) != NULL) {
+    printf("[%d]: [%.*s]\n", idx, val.len, val.ptr);
+  }
+
+exit:
+  free(json);
+  return 0;
+}