Fix NullPointerException when a reviewer is deleted (#771)

src/main/java/org/kohsuke/github/GHPullRequestReview.java

@@ -80,7 +80,10 @@ public String getBody() {
      *             the io exception
      */
     public GHUser getUser() throws IOException {
-        return owner.root().getUser(user.getLogin());
+        if (user != null) {
+            return owner.root().getUser(user.getLogin());
+        }
+        return null;
     }
 
     /**

src/test/java/org/kohsuke/github/GHPullRequestTest.java

@@ -9,6 +9,7 @@
 import java.util.Collection;
 import java.util.Collections;
 import java.util.List;
+import java.util.Optional;
 
 import static org.hamcrest.Matchers.*;
 
@@ -543,6 +544,38 @@ public void getUserTest() throws IOException {
         }
     }
 
+    @Test
+    public void checkNonExistentReviewer() throws IOException {
+        // PR id is based on https://github.com/sahansera/TestRepo/pull/1
+        final GHPullRequest pullRequest = getRepository().getPullRequest(1);
+        final Optional<GHPullRequestReview> review = pullRequest.listReviews().toList().stream().findFirst();
+        final GHUser reviewer = review.get().getUser();
+
+        assertThat(pullRequest.getRequestedReviewers(), is(empty()));
+        assertThat(review, notNullValue());
+        assertThat(reviewer, is(nullValue()));
+    }
+
+    @Test
+    public void checkNonExistentAuthor() throws IOException {
+        // PR id is based on https://github.com/sahansera/TestRepo/pull/2
+        final GHPullRequest pullRequest = getRepository().getPullRequest(2);
+
+        assertThat(pullRequest.getUser(), is(notNullValue()));
+        assertThat(pullRequest.getUser().login, is("ghost"));
+    }
+
+    @Test
+    public void checkPullRequestReviewer() throws IOException {
+        // PR id is based on https://github.com/sahansera/TestRepo/pull/6
+        final GHPullRequest pullRequest = getRepository().getPullRequest(6);
+        final Optional<GHPullRequestReview> review = pullRequest.listReviews().toList().stream().findFirst();
+        final GHUser reviewer = review.get().getUser();
+
+        assertThat(review, notNullValue());
+        assertThat(reviewer, notNullValue());
+    }
+
     protected GHRepository getRepository() throws IOException {
         return getRepository(gitHub);
     }

src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/checkNonExistentAuthor/__files/orgs_hub4j-test-org-2.json

@@ -0,0 +1,19 @@
+{
+  "login": "hub4j-test-org",
+  "id": 2032296,
+  "node_id": "MDQ6VXNlcjIwMzIyOTY=",
+  "avatar_url": "https://avatars.githubusercontent.com/u/2032296?v=4",
+  "gravatar_id": "",
+  "url": "https://api.github.com/users/hub4j-test-org",
+  "html_url": "https://github.com/hub4j-test-org",
+  "followers_url": "https://api.github.com/users/hub4j-test-org/followers",
+  "following_url": "https://api.github.com/users/hub4j-test-org/following{/other_user}",
+  "gists_url": "https://api.github.com/users/hub4j-test-org/gists{/gist_id}",
+  "starred_url": "https://api.github.com/users/hub4j-test-org/starred{/owner}{/repo}",
+  "subscriptions_url": "https://api.github.com/users/hub4j-test-org/subscriptions",
+  "organizations_url": "https://api.github.com/users/hub4j-test-org/orgs",
+  "repos_url": "https://api.github.com/users/hub4j-test-org/repos",
+  "events_url": "https://api.github.com/users/hub4j-test-org/events{/privacy}",
+  "received_events_url": "https://api.github.com/users/hub4j-test-org/received_events",
+  "type": "User"
+}

src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/checkNonExistentAuthor/__files/repos_hub4j-test-org_github-api-3.json

@@ -0,0 +1,114 @@
+{
+  "id": 423321524,
+  "node_id": "R_kgDOGTtftA",
+  "name": "github-api",
+  "full_name": "hub4j-test-org/github-api",
+  "private": false,
+  "owner": {
+    "login": "hub4j-test-org",
+    "id": 2032296,
+    "node_id": "MDQ6VXNlcjIwMzIyOTY=",
+    "avatar_url": "https://avatars.githubusercontent.com/u/2032296?v=4",
+    "gravatar_id": "",
+    "url": "https://api.github.com/users/hub4j-test-org",
+    "html_url": "https://github.com/hub4j-test-org",
+    "followers_url": "https://api.github.com/users/hub4j-test-org/followers",
+    "following_url": "https://api.github.com/users/hub4j-test-org/following{/other_user}",
+    "gists_url": "https://api.github.com/users/hub4j-test-org/gists{/gist_id}",
+    "starred_url": "https://api.github.com/users/hub4j-test-org/starred{/owner}{/repo}",
+    "subscriptions_url": "https://api.github.com/users/hub4j-test-org/subscriptions",
+    "organizations_url": "https://api.github.com/users/hub4j-test-org/orgs",
+    "repos_url": "https://api.github.com/users/hub4j-test-org/repos",
+    "events_url": "https://api.github.com/users/hub4j-test-org/events{/privacy}",
+    "received_events_url": "https://api.github.com/users/hub4j-test-org/received_events",
+    "type": "User",
+    "site_admin": true
+  },
+  "html_url": "https://github.com/hub4j-test-org/github-api",
+  "description": "Recreating an issue",
+  "fork": false,
+  "url": "https://api.github.com/repos/hub4j-test-org/github-api",
+  "forks_url": "https://api.github.com/repos/hub4j-test-org/github-api/forks",
+  "keys_url": "https://api.github.com/repos/hub4j-test-org/github-api/keys{/key_id}",
+  "collaborators_url": "https://api.github.com/repos/hub4j-test-org/github-api/collaborators{/collaborator}",
+  "teams_url": "https://api.github.com/repos/hub4j-test-org/github-api/teams",
+  "hooks_url": "https://api.github.com/repos/hub4j-test-org/github-api/hooks",
+  "issue_events_url": "https://api.github.com/repos/hub4j-test-org/github-api/issues/events{/number}",
+  "events_url": "https://api.github.com/repos/hub4j-test-org/github-api/events",
+  "assignees_url": "https://api.github.com/repos/hub4j-test-org/github-api/assignees{/user}",
+  "branches_url": "https://api.github.com/repos/hub4j-test-org/github-api/branches{/branch}",
+  "tags_url": "https://api.github.com/repos/hub4j-test-org/github-api/tags",
+  "blobs_url": "https://api.github.com/repos/hub4j-test-org/github-api/git/blobs{/sha}",
+  "git_tags_url": "https://api.github.com/repos/hub4j-test-org/github-api/git/tags{/sha}",
+  "git_refs_url": "https://api.github.com/repos/hub4j-test-org/github-api/git/refs{/sha}",
+  "trees_url": "https://api.github.com/repos/hub4j-test-org/github-api/git/trees{/sha}",
+  "statuses_url": "https://api.github.com/repos/hub4j-test-org/github-api/statuses/{sha}",
+  "languages_url": "https://api.github.com/repos/hub4j-test-org/github-api/languages",
+  "stargazers_url": "https://api.github.com/repos/hub4j-test-org/github-api/stargazers",
+  "contributors_url": "https://api.github.com/repos/hub4j-test-org/github-api/contributors",
+  "subscribers_url": "https://api.github.com/repos/hub4j-test-org/github-api/subscribers",
+  "subscription_url": "https://api.github.com/repos/hub4j-test-org/github-api/subscription",
+  "commits_url": "https://api.github.com/repos/hub4j-test-org/github-api/commits{/sha}",
+  "git_commits_url": "https://api.github.com/repos/hub4j-test-org/github-api/git/commits{/sha}",
+  "comments_url": "https://api.github.com/repos/hub4j-test-org/github-api/comments{/number}",
+  "issue_comment_url": "https://api.github.com/repos/hub4j-test-org/github-api/issues/comments{/number}",
+  "contents_url": "https://api.github.com/repos/hub4j-test-org/github-api/contents/{+path}",
+  "compare_url": "https://api.github.com/repos/hub4j-test-org/github-api/compare/{base}...{head}",
+  "merges_url": "https://api.github.com/repos/hub4j-test-org/github-api/merges",
+  "archive_url": "https://api.github.com/repos/hub4j-test-org/github-api/{archive_format}{/ref}",
+  "downloads_url": "https://api.github.com/repos/hub4j-test-org/github-api/downloads",
+  "issues_url": "https://api.github.com/repos/hub4j-test-org/github-api/issues{/number}",
+  "pulls_url": "https://api.github.com/repos/hub4j-test-org/github-api/pulls{/number}",
+  "milestones_url": "https://api.github.com/repos/hub4j-test-org/github-api/milestones{/number}",
+  "notifications_url": "https://api.github.com/repos/hub4j-test-org/github-api/notifications{?since,all,participating}",
+  "labels_url": "https://api.github.com/repos/hub4j-test-org/github-api/labels{/name}",
+  "releases_url": "https://api.github.com/repos/hub4j-test-org/github-api/releases{/id}",
+  "deployments_url": "https://api.github.com/repos/hub4j-test-org/github-api/deployments",
+  "created_at": "2021-11-01T03:08:27Z",
+  "updated_at": "2021-11-01T03:09:57Z",
+  "pushed_at": "2021-11-08T13:29:40Z",
+  "git_url": "git://github.com/hub4j-test-org/github-api.git",
+  "ssh_url": "git@github.com:hub4j-test-org/github-api.git",
+  "clone_url": "https://github.com/hub4j-test-org/github-api.git",
+  "svn_url": "https://github.com/hub4j-test-org/github-api",
+  "homepage": null,
+  "size": 2,
+  "stargazers_count": 0,
+  "watchers_count": 0,
+  "language": null,
+  "has_issues": true,
+  "has_projects": true,
+  "has_downloads": true,
+  "has_wiki": true,
+  "has_pages": false,
+  "forks_count": 0,
+  "mirror_url": null,
+  "archived": false,
+  "disabled": false,
+  "open_issues_count": 0,
+  "license": null,
+  "allow_forking": true,
+  "is_template": false,
+  "topics": [],
+  "visibility": "public",
+  "forks": 0,
+  "open_issues": 0,
+  "watchers": 0,
+  "default_branch": "main",
+  "permissions": {
+    "admin": true,
+    "maintain": true,
+    "push": true,
+    "triage": true,
+    "pull": true
+  },
+  "temp_clone_token": "",
+  "allow_squash_merge": true,
+  "allow_merge_commit": true,
+  "allow_rebase_merge": true,
+  "allow_auto_merge": false,
+  "delete_branch_on_merge": false,
+  "allow_update_branch": false,
+  "network_count": 0,
+  "subscribers_count": 1
+}