List pull requests associated with a commit

doc/commits.md

@@ -35,3 +35,11 @@ $commit = $client->api('repo')->commits()->compare('KnpLabs', 'php-github-api',
 ```
 
 Returns an array of commits.
+
+### List pull requests associated with a commit
+
+```php
+$commit = $client->api('repo')->commits()->pulls('KnpLabs', 'php-github-api', '839e5185da9434753db47959bee16642bb4f2ce4');
+```
+
+Returns an array of pull requests.

lib/Github/Api/Repository/Commits.php

@@ -30,4 +30,9 @@ public function show($username, $repository, $sha)
     {
         return $this->get('/repos/'.rawurlencode($username).'/'.rawurlencode($repository).'/commits/'.rawurlencode($sha));
     }
+
+    public function pulls($username, $repository, $sha, array $params = [])
+    {
+        return $this->get('/repos/'.rawurlencode($username).'/'.rawurlencode($repository).'/commits/'.rawurlencode($sha).'/pulls', $params);
+    }
 }

test/Github/Tests/Api/Repository/CommitsTest.php

@@ -55,6 +55,25 @@ public function shouldShowCommitUsingSha()
         $this->assertEquals($expectedValue, $api->show('KnpLabs', 'php-github-api', 123));
     }
 
+    /**
+     * @test
+     */
+    public function shouldGetAllPullRequestsUsingSha()
+    {
+        $expectedValue = [
+            ['number' => '1', 'title' => 'My first PR'],
+            ['number' => '2', 'title' => 'Another PR'],
+        ];
+
+        $api = $this->getApiMock();
+        $api->expects($this->once())
+            ->method('get')
+            ->with('/repos/KnpLabs/php-github-api/commits/123/pulls')
+            ->will($this->returnValue($expectedValue));
+
+        $this->assertEquals($expectedValue, $api->pulls('KnpLabs', 'php-github-api', 123));
+    }
+
     /**
      * @return string
      */