Fix matchMedia not present, legacy browsers require a polyfill on Mocha unittest

dist/enquire.js

@@ -1,6 +1,6 @@
 /*!
- * enquire.js v2.1.6 - Awesome Media Queries in JavaScript
- * Copyright (c) 2017 Nick Williams - http://wicky.nillia.ms/enquire.js
+ * enquire.js v2.1.8 - Awesome Media Queries in JavaScript
+ * Copyright (c) 2017 Nick Williams - github.com/jojo5716/enquire.js
  * License: MIT */
 
 
@@ -114,7 +114,13 @@ var isArray = Util.isArray;
  */
 function MediaQueryDispatch () {
     if(!window.matchMedia) {
-        throw new Error('matchMedia not present, legacy browsers require a polyfill');
+        window.matchMedia = function() {
+            return {
+                matches: false,
+                addListener: function() {},
+                removeListener: function() {}
+            };
+        };
     }
 
     this.queries = {};

dist/enquire.js-unittest-fix

@@ -0,0 +1,322 @@
+/*!
+ * enquire.js-unittest-fix v2.1.7 - Awesome Media Queries in JavaScript
+ * Copyright (c) 2017 Nick Williams - github.com/jojo5716/enquire.js
+ * License: MIT */
+
+
+(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.enquire = f()}})(function(){var define,module,exports;return (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
+var QueryHandler = require(3);
+var each = require(4).each;
+
+/**
+ * Represents a single media query, manages it's state and registered handlers for this query
+ *
+ * @constructor
+ * @param {string} query the media query string
+ * @param {boolean} [isUnconditional=false] whether the media query should run regardless of whether the conditions are met. Primarily for helping older browsers deal with mobile-first design
+ */
+function MediaQuery(query, isUnconditional) {
+    this.query = query;
+    this.isUnconditional = isUnconditional;
+    this.handlers = [];
+    this.mql = window.matchMedia(query);
+
+    var self = this;
+    this.listener = function(mql) {
+        // Chrome passes an MediaQueryListEvent object, while other browsers pass MediaQueryList directly
+        self.mql = mql.currentTarget || mql;
+        self.assess();
+    };
+    this.mql.addListener(this.listener);
+}
+
+MediaQuery.prototype = {
+
+    constuctor : MediaQuery,
+
+    /**
+     * add a handler for this query, triggering if already active
+     *
+     * @param {object} handler
+     * @param {function} handler.match callback for when query is activated
+     * @param {function} [handler.unmatch] callback for when query is deactivated
+     * @param {function} [handler.setup] callback for immediate execution when a query handler is registered
+     * @param {boolean} [handler.deferSetup=false] should the setup callback be deferred until the first time the handler is matched?
+     */
+    addHandler : function(handler) {
+        var qh = new QueryHandler(handler);
+        this.handlers.push(qh);
+
+        this.matches() && qh.on();
+    },
+
+    /**
+     * removes the given handler from the collection, and calls it's destroy methods
+     *
+     * @param {object || function} handler the handler to remove
+     */
+    removeHandler : function(handler) {
+        var handlers = this.handlers;
+        each(handlers, function(h, i) {
+            if(h.equals(handler)) {
+                h.destroy();
+                return !handlers.splice(i,1); //remove from array and exit each early
+            }
+        });
+    },
+
+    /**
+     * Determine whether the media query should be considered a match
+     *
+     * @return {Boolean} true if media query can be considered a match, false otherwise
+     */
+    matches : function() {
+        return this.mql.matches || this.isUnconditional;
+    },
+
+    /**
+     * Clears all handlers and unbinds events
+     */
+    clear : function() {
+        each(this.handlers, function(handler) {
+            handler.destroy();
+        });
+        this.mql.removeListener(this.listener);
+        this.handlers.length = 0; //clear array
+    },
+
+    /*
+        * Assesses the query, turning on all handlers if it matches, turning them off if it doesn't match
+        */
+    assess : function() {
+        var action = this.matches() ? 'on' : 'off';
+
+        each(this.handlers, function(handler) {
+            handler[action]();
+        });
+    }
+};
+
+module.exports = MediaQuery;
+
+},{"3":3,"4":4}],2:[function(require,module,exports){
+var MediaQuery = require(1);
+var Util = require(4);
+var each = Util.each;
+var isFunction = Util.isFunction;
+var isArray = Util.isArray;
+
+/**
+ * Allows for registration of query handlers.
+ * Manages the query handler's state and is responsible for wiring up browser events
+ *
+ * @constructor
+ */
+function MediaQueryDispatch () {
+    if(!window.matchMedia) {
+        window.matchMedia = function() {
+            return {
+                matches: false,
+                addListener: function() {},
+                removeListener: function() {}
+            };
+        };
+    }
+
+    this.queries = {};
+    this.browserIsIncapable = !window.matchMedia('only all').matches;
+}
+
+MediaQueryDispatch.prototype = {
+
+    constructor : MediaQueryDispatch,
+
+    /**
+     * Registers a handler for the given media query
+     *
+     * @param {string} q the media query
+     * @param {object || Array || Function} options either a single query handler object, a function, or an array of query handlers
+     * @param {function} options.match fired when query matched
+     * @param {function} [options.unmatch] fired when a query is no longer matched
+     * @param {function} [options.setup] fired when handler first triggered
+     * @param {boolean} [options.deferSetup=false] whether setup should be run immediately or deferred until query is first matched
+     * @param {boolean} [shouldDegrade=false] whether this particular media query should always run on incapable browsers
+     */
+    register : function(q, options, shouldDegrade) {
+        var queries         = this.queries,
+            isUnconditional = shouldDegrade && this.browserIsIncapable;
+
+        if(!queries[q]) {
+            queries[q] = new MediaQuery(q, isUnconditional);
+        }
+
+        //normalise to object in an array
+        if(isFunction(options)) {
+            options = { match : options };
+        }
+        if(!isArray(options)) {
+            options = [options];
+        }
+        each(options, function(handler) {
+            if (isFunction(handler)) {
+                handler = { match : handler };
+            }
+            queries[q].addHandler(handler);
+        });
+
+        return this;
+    },
+
+    /**
+     * unregisters a query and all it's handlers, or a specific handler for a query
+     *
+     * @param {string} q the media query to target
+     * @param {object || function} [handler] specific handler to unregister
+     */
+    unregister : function(q, handler) {
+        var query = this.queries[q];
+
+        if(query) {
+            if(handler) {
+                query.removeHandler(handler);
+            }
+            else {
+                query.clear();
+                delete this.queries[q];
+            }
+        }
+
+        return this;
+    }
+};
+
+module.exports = MediaQueryDispatch;
+
+},{"1":1,"4":4}],3:[function(require,module,exports){
+/**
+ * Delegate to handle a media query being matched and unmatched.
+ *
+ * @param {object} options
+ * @param {function} options.match callback for when the media query is matched
+ * @param {function} [options.unmatch] callback for when the media query is unmatched
+ * @param {function} [options.setup] one-time callback triggered the first time a query is matched
+ * @param {boolean} [options.deferSetup=false] should the setup callback be run immediately, rather than first time query is matched?
+ * @constructor
+ */
+function QueryHandler(options) {
+    this.options = options;
+    !options.deferSetup && this.setup();
+}
+
+QueryHandler.prototype = {
+
+    constructor : QueryHandler,
+
+    /**
+     * coordinates setup of the handler
+     *
+     * @function
+     */
+    setup : function() {
+        if(this.options.setup) {
+            this.options.setup();
+        }
+        this.initialised = true;
+    },
+
+    /**
+     * coordinates setup and triggering of the handler
+     *
+     * @function
+     */
+    on : function() {
+        !this.initialised && this.setup();
+        this.options.match && this.options.match();
+    },
+
+    /**
+     * coordinates the unmatch event for the handler
+     *
+     * @function
+     */
+    off : function() {
+        this.options.unmatch && this.options.unmatch();
+    },
+
+    /**
+     * called when a handler is to be destroyed.
+     * delegates to the destroy or unmatch callbacks, depending on availability.
+     *
+     * @function
+     */
+    destroy : function() {
+        this.options.destroy ? this.options.destroy() : this.off();
+    },
+
+    /**
+     * determines equality by reference.
+     * if object is supplied compare options, if function, compare match callback
+     *
+     * @function
+     * @param {object || function} [target] the target for comparison
+     */
+    equals : function(target) {
+        return this.options === target || this.options.match === target;
+    }
+
+};
+
+module.exports = QueryHandler;
+
+},{}],4:[function(require,module,exports){
+/**
+ * Helper function for iterating over a collection
+ *
+ * @param collection
+ * @param fn
+ */
+function each(collection, fn) {
+    var i      = 0,
+        length = collection.length,
+        cont;
+
+    for(i; i < length; i++) {
+        cont = fn(collection[i], i);
+        if(cont === false) {
+            break; //allow early exit
+        }
+    }
+}
+
+/**
+ * Helper function for determining whether target object is an array
+ *
+ * @param target the object under test
+ * @return {Boolean} true if array, false otherwise
+ */
+function isArray(target) {
+    return Object.prototype.toString.apply(target) === '[object Array]';
+}
+
+/**
+ * Helper function for determining whether target object is a function
+ *
+ * @param target the object under test
+ * @return {Boolean} true if function, false otherwise
+ */
+function isFunction(target) {
+    return typeof target === 'function';
+}
+
+module.exports = {
+    isFunction : isFunction,
+    isArray : isArray,
+    each : each
+};
+
+},{}],5:[function(require,module,exports){
+var MediaQueryDispatch = require(2);
+module.exports = new MediaQueryDispatch();
+
+},{"2":2}]},{},[5])(5)
+});