Added missing features in the labels API

doc/issue/labels.md

@@ -12,6 +12,33 @@ $labels = $client->api('issue')->labels()->all('KnpLabs', 'php-github-api');
 List all project labels by username and repo.
 Returns an array of project labels.
 
+### Create a label
+
+```php
+$labels = $client->api('issue')->labels()->create('KnpLabs', 'php-github-api', array(
+    'name' => 'Bug',
+    'color' => 'FFFFFF',
+));
+```
+
+Create a new label in the repository.
+
+### Update a label
+
+```php
+$labels = $client->api('issue')->labels()->update('KnpLabs', 'php-github-api', 'Enhancement', 'Feature', 'FFFFFF');
+```
+
+Update the label name and color.
+
+### Delete a label
+
+```php
+$labels = $client->api('issue')->labels()->deleteLabel('KnpLabs', 'php-github-api', 'Bug');
+```
+
+Delete a new label from the repository.
+
 ### Add a label on an issue
 
 > Requires [authentication](../security.md).

lib/Github/Api/Issue/Labels.php

@@ -4,6 +4,7 @@
 
 use Github\Api\AbstractApi;
 use Github\Exception\InvalidArgumentException;
+use Github\Exception\MissingArgumentException;
 
 /**
  * @link   http://developer.github.com/v3/issues/labels/
@@ -32,6 +33,21 @@ public function create($username, $repository, array $params)
         return $this->post('repos/'.rawurlencode($username).'/'.rawurlencode($repository).'/labels', $params);
     }
 
+    public function deleteLabel($username, $repository, $label)
+    {
+        return $this->delete('repos/'.rawurlencode($username).'/'.rawurlencode($repository).'/labels/'.rawurlencode($label));
+    }
+
+    public function update($username, $repository, $label, $newName, $color)
+    {
+        $params = array(
+            'name' => $newName,
+            'color' => $color,
+        );
+
+        return $this->patch('repos/'.rawurlencode($username).'/'.rawurlencode($repository).'/labels/'.rawurlencode($label), $params);
+    }
+
     public function add($username, $repository, $issue, $labels)
     {
         if (is_string($labels)) {

test/Github/Tests/Api/Issue/LabelsTest.php

@@ -6,7 +6,6 @@
 
 class LabelsTest extends TestCase
 {
-
     /**
      * @test
      */
@@ -76,6 +75,39 @@ public function shouldCreateLabelWithColor()
         $this->assertEquals($expectedValue, $api->create('KnpLabs', 'php-github-api', $data));
     }
 
+    /**
+     * @test
+     */
+    public function shouldDeleteLabel()
+    {
+        $expectedValue = array('someOutput');
+
+        $api = $this->getApiMock();
+        $api->expects($this->once())
+            ->method('delete')
+            ->with('repos/KnpLabs/php-github-api/labels/foo')
+            ->will($this->returnValue($expectedValue));
+
+        $this->assertEquals($expectedValue, $api->deleteLabel('KnpLabs', 'php-github-api', 'foo'));
+    }
+
+    /**
+     * @test
+     */
+    public function shouldUpdateLabel()
+    {
+        $expectedValue = array(array('name' => 'bar', 'color' => 'FFF'));
+        $data = array('name' => 'bar', 'color' => 'FFF');
+
+        $api = $this->getApiMock();
+        $api->expects($this->once())
+            ->method('patch')
+            ->with('repos/KnpLabs/php-github-api/labels/foo', $data)
+            ->will($this->returnValue($expectedValue));
+
+        $this->assertEquals($expectedValue, $api->update('KnpLabs', 'php-github-api', 'foo', 'bar', 'FFF'));
+    }
+
     /**
      * @test
      */