Implement flag: with http mocked out with extra info

lib/unexpectedMitm.js

@@ -606,7 +606,7 @@ module.exports = {
                     return recordedExchanges;
                 });
             })
-            .addAssertion('<any> with http mocked out <array|object> <assertion>', function (expect, subject, requestDescriptions) { // ...
+            .addAssertion('<any> with http mocked out [with extra info] <array|object> <assertion>', function (expect, subject, requestDescriptions) { // ...
                 expect.errorMode = 'nested';
                 var mitm = createMitm();
 
@@ -819,7 +819,11 @@ module.exports = {
                 }).spread(function (httpConversation, httpConversationSatisfySpec, fulfilmentValue) {
                     expect.errorMode = 'default';
                     return expect(httpConversation, 'to satisfy', httpConversationSatisfySpec).then(function () {
-                        return fulfilmentValue;
+                        if (expect.flags['with extra info']) {
+                            return [httpConversation, httpConversationSatisfySpec, fulfilmentValue];
+                        } else {
+                            return fulfilmentValue;
+                        }
                     });
                 }).finally(function () {
                     mitm.disable();

test/unexpectedMitm.js

@@ -4,6 +4,7 @@ var pathModule = require('path'),
     fs = require('fs'),
     http = require('http'),
     https = require('https'),
+    messy = require('messy'),
     pem = require('pem'),
     stream = require('stream'),
     semver = require('semver'),
@@ -1381,6 +1382,23 @@ describe('unexpectedMitm', function () {
         });
     });
 
+    describe('with the "with extra info" flag', function () {
+        it('should resolve with the compared exchanges', function () {
+            return expect(
+                expect('GET /', 'with http mocked out with extra info', {
+                    request: 'GET /',
+                    response: 200
+                }, 'to yield response', 200),
+                'when fulfilled',
+                'to satisfy', [
+                    new messy.HttpExchange(),
+                    expect.it('to be an object'),
+                    expect.it('to be an object')
+                ]
+            );
+        });
+    });
+
     it('should preserve the fulfilment value of the promise returned by the assertion being delegated to', function () {
         return expect([1, 2], 'with http mocked out', [], 'when passed as parameters to', Math.max).then(function (value) {
             expect(value, 'to equal', 2);