for #3 - chai-as-promised test for gauge

package.json

@@ -13,6 +13,11 @@
     "request": "^2.57.0",
     "string": "^3.2.0"
   },
+  "devDependencies": {
+    "chai": "^3.0.0",
+    "chai-as-promised": "^5.1.0",
+    "nock": "^2.5.0"
+  },
   "engines": {
     "node": "0.12.2"
   },

test/gaugeSpec.js

@@ -0,0 +1,21 @@
+var chai = require("chai");
+var chaiAsPromised = require("chai-as-promised");
+var nock = require("nock");
+
+var should = chai.should();
+chai.use(chaiAsPromised);
+
+var gauge = require("../lib/gauge.js");
+
+
+describe("Gauge", function() {
+  describe("gauge()", function() {
+    it("should return gauge level", function() {
+      var gaugePage = nock('http://waterdata.usgs.gov')
+                          .get('/usa/nwis/uv?07164500')
+                          .replyWithFile(200, __dirname + '/replies/gauge3.html');
+
+      return gauge().should.eventually.equal(8.9);
+    });
+  });
+});