Instances created from axios.create have same API as default axios

closes #217

lib/axios.js

@@ -4,21 +4,34 @@ var utils = require('./utils');
 var bind = require('./helpers/bind');
 var Axios = require('./core/Axios');
 
-var defaultInstance = new Axios();
-var axios = module.exports = bind(Axios.prototype.request, defaultInstance);
+/**
+ * Create an instance of Axios
+ *
+ * @param {Object} defaultConfig The default config for the instance
+ * @return {Axios} A new instance of Axios
+ */
+function createInstance(defaultConfig) {
+  var context = new Axios(defaultConfig);
+  var instance = bind(Axios.prototype.request, context);
 
-// Copy Axios.prototype to axios instance
-utils.extend(axios, Axios.prototype, defaultInstance);
+  // Copy axios.prototype to instance
+  utils.extend(instance, Axios.prototype, context);
 
-// Copy defaultInstance to axios instance
-utils.extend(axios, defaultInstance);
+  // Copy context to instance
+  utils.extend(instance, context);
+
+  return instance;
+}
+
+// Create the default instance to be exported
+var axios = module.exports = createInstance();
 
 // Expose Axios class to allow class inheritance
 axios.Axios = Axios;
 
 // Factory for creating new instances
 axios.create = function create(defaultConfig) {
-  return new Axios(defaultConfig);
+  return createInstance(defaultConfig);
 };
 
 // Expose all/spread

test/specs/instance.spec.js

@@ -6,6 +6,28 @@ describe('instance', function () {
   afterEach(function () {
     jasmine.Ajax.uninstall();
   });
+  
+  it('should have the same methods as default instance', function () {
+    var instance = axios.create();
+
+    for (var prop in axios) {
+      if (['Axios', 'create', 'all', 'spread'].includes(prop)) {
+        continue;
+      }
+      expect(typeof instance[prop]).toBe(typeof axios[prop]);
+    }
+  });
+
+  it('should make an http request without verb helper', function (done) {
+    var instance = axios.create();
+
+    instance('/foo');
+
+    getAjaxRequest().then(function (request) {
+      expect(request.url).toBe('/foo');
+      done();
+    });
+  });
 
   it('should make an http request', function (done) {
     var instance = axios.create();