add: unit and integration testing

app/node_modules/istanbul-lib-report/index.js

@@ -0,0 +1,40 @@
+/*
+ Copyright 2012-2015, Yahoo Inc.
+ Copyrights licensed under the New BSD License. See the accompanying LICENSE file for terms.
+ */
+'use strict';
+
+/**
+ * @module Exports
+ */
+
+const Context = require('./lib/context');
+const watermarks = require('./lib/watermarks');
+const ReportBase = require('./lib/report-base');
+
+module.exports = {
+    /**
+     * returns a reporting context for the supplied options
+     * @param {Object} [opts=null] opts
+     * @returns {Context}
+     */
+    createContext(opts) {
+        return new Context(opts);
+    },
+
+    /**
+     * returns the default watermarks that would be used when not
+     * overridden
+     * @returns {Object} an object with `statements`, `functions`, `branches`,
+     *  and `line` keys. Each value is a 2 element array that has the low and
+     *  high watermark as percentages.
+     */
+    getDefaultWatermarks() {
+        return watermarks.getDefault();
+    },
+
+    /**
+     * Base class for all reports
+     */
+    ReportBase
+};