Fix to allow mocking arraybuffer responses (#66)

It also allows to mock other non simple object (like Blob) responses.

src/handle_request.js

@@ -5,7 +5,7 @@ var utils = require('./utils');
 function makeResponse(result, config) {
   return {
     status: result[0],
-    data: utils.isObject(result[1]) ? JSON.parse(JSON.stringify(result[1])) : result[1],
+    data: utils.isSimpleObject(result[1]) ? JSON.parse(JSON.stringify(result[1])) : result[1],
     headers: result[2],
     config: config
   };

src/utils.js

@@ -111,14 +111,14 @@ function createErrorResponse(message, config, response) {
   return error;
 }
 
-function isObject(value) {
-  return value !== null && typeof value === 'object';
+function isSimpleObject(value) {
+  return value !== null && value !== undefined && value.toString() === '[object Object]';
 }
 
 module.exports = {
   find: find,
   findHandler: findHandler,
-  isObject: isObject,
+  isSimpleObject: isSimpleObject,
   purgeIfReplyOnce: purgeIfReplyOnce,
   settle: settle
 };

test/basics.spec.js

@@ -376,6 +376,23 @@ describe('MockAdapter basics', function() {
     });
   });
 
+  it('allows sending an any object as response', function() {
+    var buffer = new ArrayBuffer(1);
+    var view = new Uint8Array(buffer);
+    view[0] = 0xFF;
+
+    mock.onGet('/').reply(200, buffer);
+
+    return instance({
+      url: '/',
+      method: 'GET',
+      responseType: 'arraybuffer'
+    }).then(function(response) {
+      var view = new Uint8Array(response.data);
+      expect(view[0]).to.equal(0xFF);
+    });
+  });
+
   it('returns a deep copy of the mock data in the response when the data is an object', function() {
     var data = {
       foo: {