Add tests for LocalBinary download

Testing download without and with a proxy

Author: mohlendo

package.json

@@ -23,7 +23,8 @@
     "eslint": "1.10.3",
     "expect.js": "0.3.1",
     "mocha": "2.4.5",
-    "mocks": "0.0.15"
+    "mocks": "0.0.15",
+    "proxy": "^0.2.4"
   },
   "bugs": "https://github.com/browserstack/browserstack-local-nodejs/issues",
   "homepage": "https://github.com/browserstack/browserstack-local-nodejs",

test/local.js

@@ -2,7 +2,9 @@ var expect = require('expect.js'),
     mocks = require('mocks'),
     path = require('path'),
     fs = require('fs'),
-    browserstack = require('../index');
+    Proxy = require('proxy'),
+    browserstack = require('../index'),
+    LocalBinary = require('../lib/LocalBinary');
 
 describe('Local', function () {
   var bsLocal;
@@ -152,3 +154,57 @@ describe('Local', function () {
   });
 
 });
+
+describe('LocalBinary', function () {
+  var proxy;
+  var proxyPort;
+  var binary;
+  var tempDownloadPath;
+
+  before(function (done) {
+    // setup HTTP proxy server
+    proxy = new Proxy();
+    proxy.listen(function () {
+      proxyPort = proxy.address().port;
+      done();
+    });
+  });
+
+  after(function (done) {
+    proxy.once('close', function () { done(); });
+    proxy.close();
+  });
+
+  beforeEach(function () {
+    binary = new LocalBinary();
+    tempDownloadPath = path.join(process.cwd(), 'download');
+  });
+
+  afterEach(function () {
+    fs.rmdirSync(tempDownloadPath);
+  });
+
+  it('should download binaries without proxy', function (done) {
+    this.timeout(600000);
+    var conf = {};
+    binary.download(conf, tempDownloadPath, function (result) {
+      expect(fs.existsSync(result)).to.equal(true);
+      fs.unlinkSync(result);
+      done();
+    });
+  });
+
+  it('should download binaries with proxy', function (done) {
+    this.timeout(600000);
+    var conf = {
+      proxyHost: '127.0.0.1',
+      proxyPort: proxyPort
+    };
+    binary.download(conf, tempDownloadPath, function (result) {
+      // test for file existence
+      expect(fs.existsSync(result)).to.equal(true);
+      fs.unlinkSync(result);
+      done();
+    });
+  });
+});