Add reset method

Author: ctimmerm

README.md

@@ -45,6 +45,15 @@ You can restore the original adapter (which will remove the mocking behavior)
 mock.restore();
 ```
 
+You can also reset the registered mock handlers with `reset`
+
+```js
+mock.reset();
+```
+
+`reset` is different from `restore` in that `restore` removes the mocking from the axios instance completely,
+whereas `reset` only removes all mock handlers that were added with onGet, onPost, etc. but leaves the mocking in place.
+
 Passing a function to `reply`
 
 ```js

index.js

@@ -31,11 +31,15 @@ function adapter() {
   }.bind(this);
 }
 
-function MockAdapter(axiosInstance) {
+function reset() {
   this.matchers = verbs.reduce(function(previousValue, currentValue) {
     previousValue[currentValue] = [];
     return previousValue;
   }, {});
+}
+
+function MockAdapter(axiosInstance) {
+  reset.call(this);
 
   if (axiosInstance) {
     this.axiosInstance = axiosInstance;
@@ -65,6 +69,8 @@ MockAdapter.prototype.restore = function() {
   }
 };
 
+MockAdapter.prototype.reset = reset;
+
 verbs.forEach(function(method) {
   var methodName = 'on' + method.charAt(0).toUpperCase() + method.slice(1);
   MockAdapter.prototype[methodName] = function(matcher) {

test/mock_adapter_test.js

@@ -163,6 +163,18 @@ describe('MockAdapter', function() {
     expect(newInstance.defaults.adapter).to.equal(adapter);
   });
 
+  it('resets the registered mock handlers', function(done) {
+    mock.onGet('/foo').reply(500);
+    mock.reset();
+    mock.onGet('/foo').reply(200);
+
+    instance.get('/foo')
+      .then(function(response) {
+        expect(response.status).to.equal(200);
+        done();
+      });
+  });
+
   it('can chain calls to add mock handlers', function() {
     mock
       .onGet('/foo').reply(200)