Added the ability to mock BeeAuth::generateToken with Laravel

Author: luisdalmolin

README.md

@@ -120,9 +120,23 @@ Client Secret: `config('services.bee.client_secret')`
 
 If you don't want to use this config, you can always pass the values manually.
 
+### Caching with Laravel
+
 Laravel service provider will also automatically inject Laravel's cache implementation on `BeeAuth`, so your auth tokens will be cached for as long as possible.
 
-### Testing
+### Testing with Laravel
+
+If you are writing integration tests, but don't want your tests making requests to Bee to get credentials, we have a little helper that can help you. Just run the following code:
+
+```php
+use KirschbaumDevelopment\Bee\Laravel\BeeAuthMock;
+
+BeeAuthMock::init();
+```
+
+With this, any time you call `BeeAuth::generateToken()` in your code you will receive the same response you would receive, but with some fake tokens and without making any HTTP requests.
+
+## Testing
 
 ``` bash
 composer test

src/Laravel/BeeAuthMock.php

@@ -0,0 +1,30 @@
+<?php
+
+namespace KirschbaumDevelopment\Bee\Laravel;
+
+use Mockery;
+use KirschbaumDevelopment\Bee\BeeAuth;
+use KirschbaumDevelopment\Bee\Resources\AuthorizationToken;
+
+class BeeAuthMock
+{
+    public static function init()
+    {
+        $token = new AuthorizationToken([
+            'access_token' => 'isufgisufdhguisdfhuisdf.oasihuifghsdif79s87f9sd8f7sd98f7sd98f7dsu89f.owTLmGhqv6ZJSikUhGeLBv-JANoXEAVvMZomivT2o-g',
+            'token_type' => 'bearer',
+            'expires_in' => 300,
+            'refresh_token' => '09a7sd98as7f98ds6f79sd8f.09a8s7da98sd7as98d7as9d8a7s9d8as6d9as86das98d67as.owTLmGhqv6ZJSikUhGeLBv-JANoXEAVvMZomivT2o-g',
+            'as:client_id' => 'da91fe57-1ca6-4dba-b557-61edb96f4149',
+            'userName' => 'Tn3KV7JYavWn',
+            'as:region' => 'eu-west-1',
+            '.issued' => 'Sat, 17 Aug 2019 00:08:50 GMT',
+            '.expires' => 'Sat, 17 Aug 2019 00:13:50 GMT',
+        ]);
+
+        $beeAuth = Mockery::mock(BeeAuth::class);
+        $beeAuth->shouldReceive('generateToken')->andReturn($token);
+
+        app()->instance(BeeAuth::class, $beeAuth);
+    }
+}