Add the ability to fetch user installations (#577)

* Add the ability to fetch user installations

* fix style

* tests and support for pagination

* style fix

Author: bdelbasso

lib/Github/Api/CurrentUser.php

@@ -168,4 +168,14 @@ public function subscriptions()
     {
         return $this->get('/user/subscriptions');
     }
+
+    /**
+     * @link https://developer.github.com/v3/integrations/#list-installations-for-user
+     *
+     * @param array $params
+     */
+    public function installations(array $params = array())
+    {
+        return $this->get('/user/installations', array_merge(array('page' => 1), $params));
+    }
 }

test/Github/Tests/Api/CurrentUserTest.php

@@ -84,6 +84,22 @@ public function shouldGetWatchedRepositories()
         $this->assertEquals($expectedArray, $api->watched(1));
     }
 
+    /**
+     * @test
+     */
+    public function shouldGetInstallationsForUser()
+    {
+        $result = ['installation1', 'installation2'];
+
+        $api = $this->getApiMock();
+        $api->expects($this->once())
+            ->method('get')
+            ->with('/user/installations')
+            ->willReturn($result);
+
+        $this->assertEquals($result, $api->installations());
+    }
+
     /**
      * @test
      */