Add function to delete pending reviews on a pull request (#1897)

Add a delete method to PullRequestReview to allow dismissing them.

Fixes #1856 

Co-authored-by: bagashvilit <bagashvilit@allegheny.edu>
Co-authored-by: WonjoonC <chos@allegheny.edu>

github/PullRequestReview.py

@@ -105,6 +105,15 @@ def dismiss(self, message):
             input=post_parameters,
         )
 
+    def delete(self):
+        """
+        :calls: `DELETE /repos/:owner/:repo/pulls/:number/reviews/:review_id <https://developer.github.com/v3/pulls/reviews/>`_
+        :rtype: None
+        """
+        headers, data = self._requester.requestJsonAndCheck(
+            "DELETE", f"{self.pull_request_url}/reviews/{self.id}"
+        )
+
     def _initAttributes(self):
         self._id = github.GithubObject.NotSet
         self._user = github.GithubObject.NotSet

github/PullRequestReview.pyi

@@ -13,6 +13,7 @@ class PullRequestReview(CompletableGithubObject):
     @property
     def commit_id(self) -> str: ...
     def dismiss(self, message: str) -> None: ...
+    def delete(self) -> None: ...
     @property
     def html_url(self) -> str: ...
     @property

tests/PullRequestReview.py

@@ -32,6 +32,7 @@
 class PullRequestReview(Framework.TestCase):
     def setUp(self):
         super().setUp()
+
         self.repo = self.g.get_repo("PyGithub/PyGithub", lazy=True)
         self.pull = self.repo.get_pull(538)
 

tests/PullRequestReview1856.py

@@ -0,0 +1,14 @@
+from . import Framework
+
+
+class PullRequestReview1856(Framework.TestCase):
+    def setUp(self):
+        super().setUp()
+        pumpkin_repo = self.g.get_repo("CS481-Team-Pumpkin/PyGithub", lazy=True)
+        self.pumpkin_pull = pumpkin_repo.get_pull(4)
+        self.pullreview = self.pumpkin_pull.get_review(631460061)
+
+    def testDelete(self):
+        self.pullreview.delete()
+        reviews = self.pumpkin_pull.get_reviews()
+        self.assertEqual(list(reviews), [])