Implement missing review request api

doc/pull_request/review_request.md

@@ -0,0 +1,27 @@
+## Pull Requests / Review Requests API
+[Back to the "Pull Requests API"](../pull_requests.md) | [Back to the navigation](../README.md)
+
+The Pull Request Review API is currently available for developers to preview.
+To access the API during the preview period, you must provide a custom media type in the Accept header:
+
+```php
+$client->api('pull_request')->reviewRequests()->configure();
+```
+
+### List all review requests
+
+```php
+$reviewRequests = $client->api('pull_request')->reviewRequests()->all('twbs', 'bootstrap', 12);
+```
+
+### Create a review request
+
+```php
+$client->api('pull_request')->reviewRequests()->create('twbs', 'bootstrap', 12, array('user1', 'user2'));
+```
+
+### Remove a review request
+
+```php
+$client->api('pull_request')->reviewRequests()->remove('twbs', 'bootstrap', 12, array('user1', 'user2'));
+```

lib/Github/Api/PullRequest.php

@@ -4,6 +4,7 @@
 
 use Github\Api\PullRequest\Comments;
 use Github\Api\PullRequest\Review;
+use Github\Api\PullRequest\ReviewRequest;
 use Github\Exception\MissingArgumentException;
 
 /**
@@ -71,6 +72,11 @@ public function reviews()
         return new Review($this->client);
     }
 
+    public function reviewRequests()
+    {
+        return new ReviewRequest($this->client);
+    }
+
     /**
      * Create a pull request.
      *

lib/Github/Api/PullRequest/Review.php

@@ -3,6 +3,7 @@
 namespace Github\Api\PullRequest;
 
 use Github\Api\AbstractApi;
+use Github\Api\AcceptHeaderTrait;
 use Github\Exception\InvalidArgumentException;
 use Github\Exception\MissingArgumentException;
 
@@ -14,6 +15,15 @@
  */
 class Review extends AbstractApi
 {
+    use AcceptHeaderTrait;
+
+    public function configure()
+    {
+        $this->acceptHeaderValue = 'application/vnd.github.black-cat-preview+json';
+
+        return $this;
+    }
+
     /**
      * Get a listing of a pull request's reviews by the username, repository and pull request number.
      *

lib/Github/Api/PullRequest/ReviewRequest.php

@@ -0,0 +1,66 @@
+<?php
+
+namespace Github\Api\PullRequest;
+
+use Github\Api\AbstractApi;
+use Github\Api\AcceptHeaderTrait;
+
+/**
+ * @link https://developer.github.com/v3/pulls/review_requests/
+ */
+class ReviewRequest extends AbstractApi
+{
+    use AcceptHeaderTrait;
+
+    public function configure()
+    {
+        $this->acceptHeaderValue = 'application/vnd.github.black-cat-preview+json';
+
+        return $this;
+    }
+
+    /**
+     * @link https://developer.github.com/v3/pulls/review_requests/#list-review-requests
+     *
+     * @param string $username
+     * @param string $repository
+     * @param int    $pullRequest
+     * @param array  $params
+     *
+     * @return array
+     */
+    public function all($username, $repository, $pullRequest, array $params = [])
+    {
+        return $this->get('/repos/'.rawurlencode($username).'/'.rawurlencode($repository).'/pulls/'.$pullRequest.'/requested_reviewers', $params);
+    }
+
+    /**
+     * @link https://developer.github.com/v3/pulls/review_requests/#create-a-review-request
+     *
+     * @param string $username
+     * @param string $repository
+     * @param int    $pullRequest
+     * @param array  $reviewers
+     *
+     * @return string
+     */
+    public function create($username, $repository, $pullRequest, array $reviewers)
+    {
+        return $this->post('/repos/'.rawurlencode($username).'/'.rawurlencode($repository).'/pulls/'.$pullRequest.'/requested_reviewers', ['reviewers' => $reviewers]);
+    }
+
+    /**
+     * @link https://developer.github.com/v3/pulls/review_requests/#delete-a-review-request
+     *
+     * @param string $username
+     * @param string $repository
+     * @param int    $pullRequest
+     * @param array  $reviewers
+     *
+     * @return string
+     */
+    public function remove($username, $repository, $pullRequest, array $reviewers)
+    {
+        return $this->delete('/repos/'.rawurlencode($username).'/'.rawurlencode($repository).'/pulls/'.$pullRequest.'/requested_reviewers', ['reviewers' => $reviewers]);
+    }
+}

test/Github/Tests/Api/PullRequest/ReviewRequestTest.php

@@ -0,0 +1,65 @@
+<?php
+
+namespace Github\Tests\Api\PullRequest;
+
+use Github\Api\PullRequest\ReviewRequest;
+use Github\Tests\Api\TestCase;
+
+class ReviewRequestTest extends TestCase
+{
+    /**
+     * @test
+     */
+    public function shouldGetAllReviewRequestsForAPullRequest()
+    {
+        $expectedValue = [
+            ['id' => 80],
+            ['id' => 81],
+        ];
+
+        $api = $this->getApiMock();
+        $api
+            ->expects($this->once())
+            ->method('get')
+            ->with('/repos/octocat/Hello-World/pulls/12/requested_reviewers')
+            ->willReturn($expectedValue);
+
+        $this->assertSame($expectedValue, $api->all('octocat', 'Hello-World', 12));
+    }
+
+    /**
+     * @test
+     */
+    public function shouldCreateReviewRequest()
+    {
+        $api = $this->getApiMock();
+        $api->expects($this->once())
+            ->method('post')
+            ->with('/repos/octocat/Hello-World/pulls/12/requested_reviewers', ['reviewers' => ['testuser']])
+        ;
+
+        $api->create('octocat', 'Hello-World', 12, ['testuser']);
+    }
+
+    /**
+     * @test
+     */
+    public function shouldDeleteReviewRequest()
+    {
+        $api = $this->getApiMock();
+        $api->expects($this->once())
+            ->method('delete')
+            ->with('/repos/octocat/Hello-World/pulls/12/requested_reviewers', ['reviewers' => ['testuser']])
+        ;
+
+        $api->remove('octocat', 'Hello-World', 12, ['testuser']);
+    }
+
+    /**
+     * @return string
+     */
+    protected function getApiClass()
+    {
+        return ReviewRequest::class;
+    }
+}