Issue #29 - Mock network failure and timeout responses

src/index.js

@@ -55,12 +55,13 @@ VERBS.concat('any').forEach(function(method) {
   MockAdapter.prototype[methodName] = function(matcher, body) {
     var _this = this;
     var matcher = matcher === undefined ?  /.*/ : matcher;
+    function reply(code, response, headers) {
+      var handler = [matcher, body, code, response, headers];
+      addHandler(method, _this.handlers, handler);
+      return _this;
+    }
     return {
-      reply: function reply(code, response, headers) {
-        var handler = [matcher, body, code, response, headers];
-        addHandler(method, _this.handlers, handler);
-        return _this;
-      },
+      reply: reply,
 
       replyOnce: function replyOnce(code, response, headers) {
         var handler = [matcher, body, code, response, headers];
@@ -73,7 +74,25 @@ VERBS.concat('any').forEach(function(method) {
         var handler = [matcher, body];
         addHandler(method, _this.handlers, handler);
         return _this;
+      },
+
+      networkError: function() {
+        reply(function(config) {
+          var error = new Error('Network Error');
+          error.config = config;
+          return Promise.reject(error);
+        });
+      },
+
+      timeout: function(timeout) {
+        reply(function(config) {
+          var error = new Error('timeout of ' + config.timeout + 'ms exceeded');
+          error.config = config;
+          error.code = 'ECONNABORTED';
+          return Promise.reject(error);
+        });
       }
+
     };
   };
 });

test/network_error.spec.js

@@ -0,0 +1,29 @@
+var axios = require('axios');
+var expect = require('chai').expect;
+
+var MockAdapter = require('../src');
+
+describe('networkError spec', function() {
+  var mock;
+
+  beforeEach(function() {
+    mock = new MockAdapter(axios);
+  });
+
+  afterEach(function() {
+    mock.restore();
+  });
+
+  it('mocks networkErrors', function() {
+    mock.onGet('/foo').networkError();
+
+    return axios.get('/foo')
+      .then(function() {
+        expect.fail('should not be called');
+      }, function(error) {
+        expect(error.config).to.exist;
+        expect(error.response).to.not.exist;
+        expect(error.message).to.equal('Network Error');
+      });
+  });
+});

test/timeout.spec.js

@@ -0,0 +1,29 @@
+var axios = require('axios');
+var expect = require('chai').expect;
+
+var MockAdapter = require('../src');
+
+describe('timeout spec', function() {
+  var mock;
+
+  beforeEach(function() {
+    mock = new MockAdapter(axios);
+  });
+
+  afterEach(function() {
+    mock.restore();
+  });
+
+  it('mocks timeout response', function() {
+    mock.onGet('/foo').timeout();
+
+    return axios.get('/foo')
+      .then(function() {
+        expect.fail('should not be called');
+      }, function(error) {
+        expect(error.config).to.exist;
+        expect(error.code).to.equal('ECONNABORTED');
+        expect(error.message).to.equal('timeout of 0ms exceeded');
+      });
+  });
+});