Set up mocha, chai and karma for sheriff-o-matic unit testing.

Tools/GardeningServer/karma.conf.js

Index: Tools/GardeningServer/karma.conf.js
diff --git a/Tools/GardeningServer/karma.conf.js b/Tools/GardeningServer/karma.conf.js
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+// Karma configuration
+// Generated on Mon Jul 21 2014 15:27:46 GMT-0700 (PDT)
+
+module.exports = function(config) {
+  config.set({
+
+    // base path that will be used to resolve all patterns (eg. files, exclude)
+    basePath: '.',
+
+    // frameworks to use
+    // available frameworks: https://npmjs.org/browse/keyword/karma-adapter
+    frameworks: ['mocha'],
+
+    // mocha setup
+    client: {
+      mocha: {
+        ui: 'bdd'
+      }
+    },
+
+    // list of files / patterns to load in the browser
+    files: [
+      {pattern: 'bower_components/chai/chai.js', watched: true, included: true, served: true},
+      {pattern: 'bower_components/sugar/release/sugar-full.development.js', watched: true, included: true, served: true},
+      {pattern: 'bower_components/platform/platform.js', watched: true, included: true, served: true},
+      {pattern: 'bower_components/polymer/polymer.html', watched: true, included: true, served: true},
+      {pattern: 'bower_components/**/*.{js,html,css,map}', watched: true, included: false, served: true},
+      {pattern: 'node_modules/mocha/mocha.js', watched: true, included: true, served: true},
+      {pattern: 'polymer-load-warning.html', watched: true, included: false, served: true},
+      {pattern: 'model/**/*[^tests].html', watched: true, included: false, served: true},
+      {pattern: 'ui/**/*[^tests].{js,html,css}', watched: true, included: false, served: true},
+      'ui/test/*',
+    ],
+
+    // list of files to exclude
+    exclude: [
+      'scripts/*tests.js',
+    ],
+
+    // preprocess matching files before serving them to the browser
+    // available preprocessors: https://npmjs.org/browse/keyword/karma-preprocessor
+    preprocessors: {
+    },
+
+    // test results reporter to use
+    // possible values: 'dots', 'progress'
+    // available reporters: https://npmjs.org/browse/keyword/karma-reporter
+    reporters: ['progress'],
+
+    // web server port
+    port: 9876,
+
+    // enable / disable colors in the output (reporters and logs)
+    colors: true,
+
+    // level of logging
+    // possible values: config.LOG_DISABLE || config.LOG_ERROR || config.LOG_WARN || config.LOG_INFO || config.LOG_DEBUG
+    logLevel: config.LOG_ERROR,
+
+    // enable / disable watching file and executing tests whenever any file changes
+    autoWatch: true,
+
+    // start these browsers
+    // available browser launchers: https://npmjs.org/browse/keyword/karma-launcher
+    browsers: ['Chrome'],
+
+    // Continuous Integration mode
+    // if true, Karma captures browsers, runs the tests and exits
+    singleRun: false,
+
+    plugins: [
+      'karma-mocha',
+      'karma-chrome-launcher'
+    ]
+  });
+};