Start in on the tests

spec/document_handler_spec.js

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+var DocumentHandler = require('../lib/document_handler');
+
+describe('document_handler', function() {
+
+  describe('randomKey', function() {
+
+    it('should choose a key of the proper length', function() {
+      var dh = new DocumentHandler({ keyLength: 6 });
+      expect(dh.randomKey().length).toBe(6);
+    });
+
+    it('should choose a default key length', function() {
+      var dh = new DocumentHandler();
+      expect(dh.keyLength).toBe(DocumentHandler.defaultKeyLength);
+    });
+
+  });
+
+});