implemented PullRequests::deleteApproval (API 2.0)

Author: vimishor

docs/repositories/pullrequests.md

@@ -67,6 +67,11 @@ $pull->commits($account_name, $repo_slug, 1);
 $pull->approve($account_name, $repo_slug, 1);
 ```
 
+### Delete a a pull request approval:
+```php
+$pull->delete($account_name, $repo_slug, 1);
+```
+
 ----
 
 #### Related:

lib/Bitbucket/API/Repositories/PullRequests.php

@@ -177,4 +177,22 @@ public function approve($account, $repo, $id)
             sprintf('repositories/%s/%s/pullrequests/%d/approve', $account, $repo, $id)
         );
     }
+
+    /**
+     * Delete a pull request approval
+     *
+     * NOTE: On success returns `HTTP/1.1 204 NO CONTENT`
+     *
+     * @access public
+     * @param  string           $account The team or individual account owning the repository.
+     * @param  string           $repo    The repository identifier.
+     * @param  int              $id      ID of the pull request
+     * @return MessageInterface
+     */
+    public function deleteApproval($account, $repo, $id)
+    {
+        return $this->getClient()->setApiVersion('2.0')->delete(
+            sprintf('repositories/%s/%s/pullrequests/%d/approve', $account, $repo, $id)
+        );
+    }
 }

test/Bitbucket/Tests/API/Repositories/PullRequestsTest.php

@@ -171,7 +171,7 @@ public function testGetCommitsForSpecificPullRequest()
         $this->assertEquals($expectedResult, $actual);
     }
 
-    public function testApproveRequest()
+    public function testApproveAPullRequest()
     {
         $endpoint       = 'repositories/gentle/eof/pullrequests/1/approve';
 
@@ -185,4 +185,19 @@ public function testApproveRequest()
 
         $pull->approve('gentle', 'eof', 1);
     }
+
+    public function testDeletePullRequestApproval()
+    {
+        $endpoint       = 'repositories/gentle/eof/pullrequests/1/approve';
+
+        $client = $this->getHttpClientMock();
+        $client->expects($this->once())
+            ->method('delete')
+            ->with($endpoint);
+
+        /** @var \Bitbucket\API\Repositories\PullRequests $pull */
+        $pull   = $this->getClassMock('Bitbucket\API\Repositories\PullRequests', $client);
+
+        $pull->deleteApproval('gentle', 'eof', 1);
+    }
 }