Extend test for reactive-dict with initial data

packages/reactive-dict/reactive-dict-tests.js

@@ -11,9 +11,25 @@ Tinytest.add('ReactiveDict - initialize with data', function (test) {
   var dict = new ReactiveDict({
     now: now
   });
-  
+
   var nowFromDict = dict.get('now');
   test.equal(nowFromDict, now);
+
+  // Test with static value here as a named dict could
+  // be migrated if code reload happens while testing
+  dict = new ReactiveDict('foo', {
+    foo: 'bar'
+  });
+
+  nowFromDict = dict.get('foo');
+  test.equal(nowFromDict, 'bar');
+
+  dict = new ReactiveDict(undefined, {
+    now: now
+  });
+
+  nowFromDict = dict.get('now');
+  test.equal(nowFromDict, now);
 });
 
 Tinytest.add('ReactiveDict - setDefault', function (test) {