Updated comments and added test

tantalor · Mar 16, 2014 · 8e8defc · 8e8defc
1 parent 9cb2846
commit 8e8defc
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Showing 2 changed files with 3 additions and 1 deletion.
diff --git a/lib/graph.js b/lib/graph.js
@@ -47,7 +47,7 @@
   Graph.prototype.adj = function (u)
   {
     var adjacents = this._graph[u];
-    return typeof adjacents !== 'undefined' ? adjacents : {};
+    return adjacents ? adjacents : {};
   }
 
   Graph.prototype.get = function (u, v)

diff --git a/test/core.js b/test/core.js
@@ -230,6 +230,8 @@ this.core_suite =
   'Adjacency': function (test)
   {
     var g = new Graph();
+    test.ok(typeof g.adj(3) !== 'undefined',
+        "Should returns empty object when no adjacents.");
     g.set(1, 2);
     test.ok(1 in g.adj(2),
       "Vertex 1 is adjacent to vertex 2.");