Init. Map does not function and only working on backend at the moment.

node_modules/backo2/test/index.js

@@ -0,0 +1,18 @@
+
+var Backoff = require('..');
+var assert = require('assert');
+
+describe('.duration()', function(){
+  it('should increase the backoff', function(){
+    var b = new Backoff;
+
+    assert(100 == b.duration());
+    assert(200 == b.duration());
+    assert(400 == b.duration());
+    assert(800 == b.duration());
+
+    b.reset();
+    assert(100 == b.duration());
+    assert(200 == b.duration());
+  })
+})