Upgrade testing libraries

- Upgrade mocha
- Remove should due to limited usage and old style (at least by rspec standards)
- Move spec -> test which is the default
- Update tests accordingly for the above

test/document_handler_spec.js

@@ -0,0 +1,26 @@
+/* global describe, it */
+
+var assert = require('assert');
+
+var DocumentHandler = require('../lib/document_handler');
+var Generator = require('../lib/key_generators/random');
+
+describe('document_handler', function() {
+
+  describe('randomKey', function() {
+
+    it('should choose a key of the proper length', function() {
+      var gen = new Generator();
+      var dh = new DocumentHandler({ keyLength: 6, keyGenerator: gen });
+      assert.equal(6, dh.acceptableKey().length);
+    });
+
+    it('should choose a default key length', function() {
+      var gen = new Generator();
+      var dh = new DocumentHandler({ keyGenerator: gen });
+      assert.equal(dh.keyLength, DocumentHandler.defaultKeyLength);
+    });
+
+  });
+
+});

test/redis_document_store_spec.js

@@ -0,0 +1,54 @@
+/* global it, describe, afterEach */
+
+var assert = require('assert');
+
+var winston = require('winston');
+winston.remove(winston.transports.Console);
+
+var RedisDocumentStore = require('../lib/document_stores/redis');
+
+describe('redis_document_store', function() {
+
+  /* reconnect to redis on each test */
+  afterEach(function() {
+    if (RedisDocumentStore.client) {
+      RedisDocumentStore.client.quit();
+      RedisDocumentStore.client = false;
+    }
+  });
+
+  describe('set', function() {
+
+    it('should be able to set a key and have an expiration set', function(done) {
+      var store = new RedisDocumentStore({ expire: 10 });
+      store.set('hello1', 'world', function() {
+        RedisDocumentStore.client.ttl('hello1', function(err, res) {
+          assert.ok(res > 1);
+          done();
+        });
+      });
+    });
+
+    it('should not set an expiration when told not to', function(done) {
+      var store = new RedisDocumentStore({ expire: 10 });
+      store.set('hello2', 'world', function() {
+        RedisDocumentStore.client.ttl('hello2', function(err, res) {
+          assert.equal(-1, res);
+          done();
+        });
+      }, true);
+    });
+
+    it('should not set an expiration when expiration is off', function(done) {
+      var store = new RedisDocumentStore({ expire: false });
+      store.set('hello3', 'world', function() {
+        RedisDocumentStore.client.ttl('hello3', function(err, res) {
+          assert.equal(-1, res);
+          done();
+        });
+      });
+    });
+
+  });
+
+});