Make sure we refresh the PRs with the PR API (and not the issues API)

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

@@ -415,10 +415,14 @@ public void refresh() throws IOException {
             return; // cannot populate, will have to live with what we have
         }
 
-        URL url = getUrl();
-        if (url != null) {
-            root().createRequest().withPreview(SHADOW_CAT).setRawUrlPath(url.toString()).fetchInto(this).wrapUp(owner);
-        }
+        // we do not want to use getUrl() here as it points to the issues API
+        // and not the pull request one
+        URL absoluteUrl = GitHubRequest.getApiURL(root().getApiUrl(), getApiRoute());
+        root().createRequest()
+                .withPreview(SHADOW_CAT)
+                .setRawUrlPath(absoluteUrl.toString())
+                .fetchInto(this)
+                .wrapUp(owner);
     }
 
     /**

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

@@ -907,6 +907,44 @@ public void reactions() throws Exception {
         assertThat(p.listReactions().toList(), hasSize(0));
     }
 
+    /**
+     * Test refreshing a PR coming from the search results.
+     *
+     * @throws Exception
+     *             the exception
+     */
+    @Test
+    public void refreshFromSearchResults() throws Exception {
+        // To re-record, uncomment the Thread.sleep() calls below
+        snapshotNotAllowed();
+
+        String prName = "refreshFromSearchResults";
+        GHRepository repository = getRepository();
+
+        repository.createPullRequest(prName, "test/stable", "main", "## test");
+
+        // we need to wait a bit for the pull request to be indexed by GitHub
+        // Thread.sleep(2000);
+
+        GHPullRequest pullRequestFromSearchResults = repository.searchPullRequests()
+                .isOpen()
+                .titleLike(prName)
+                .list()
+                .toList()
+                .get(0);
+
+        pullRequestFromSearchResults.getMergeableState();
+
+        // wait a bit for the mergeable state to get populated
+        // Thread.sleep(5000);
+
+        assertThat("Pull request is supposed to have been refreshed and have a mergeable state",
+                pullRequestFromSearchResults.getMergeableState(),
+                equalTo("clean"));
+
+        pullRequestFromSearchResults.close();
+    }
+
     /**
      * Gets the repository.
      *

src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/refreshFromSearchResults/__files/1-orgs_hub4j-test-org.json

@@ -0,0 +1,66 @@
+{
+  "login": "hub4j-test-org",
+  "id": 7544739,
+  "node_id": "MDEyOk9yZ2FuaXphdGlvbjc1NDQ3Mzk=",
+  "url": "https://api.github.com/orgs/hub4j-test-org",
+  "repos_url": "https://api.github.com/orgs/hub4j-test-org/repos",
+  "events_url": "https://api.github.com/orgs/hub4j-test-org/events",
+  "hooks_url": "https://api.github.com/orgs/hub4j-test-org/hooks",
+  "issues_url": "https://api.github.com/orgs/hub4j-test-org/issues",
+  "members_url": "https://api.github.com/orgs/hub4j-test-org/members{/member}",
+  "public_members_url": "https://api.github.com/orgs/hub4j-test-org/public_members{/member}",
+  "avatar_url": "https://avatars.githubusercontent.com/u/7544739?v=4",
+  "description": "Hub4j Test Org Description (this could be null or blank too)",
+  "name": "Hub4j Test Org Name (this could be null or blank too)",
+  "company": null,
+  "blog": "https://hub4j.url.io/could/be/null",
+  "location": "Hub4j Test Org Location (this could be null or blank too)",
+  "email": "[email protected]",
+  "twitter_username": null,
+  "is_verified": false,
+  "has_organization_projects": true,
+  "has_repository_projects": true,
+  "public_repos": 26,
+  "public_gists": 0,
+  "followers": 2,
+  "following": 0,
+  "html_url": "https://github.com/hub4j-test-org",
+  "created_at": "2014-05-10T19:39:11Z",
+  "updated_at": "2020-06-04T05:56:10Z",
+  "archived_at": null,
+  "type": "Organization",
+  "total_private_repos": 6,
+  "owned_private_repos": 6,
+  "private_gists": 0,
+  "disk_usage": 12014,
+  "collaborators": 1,
+  "billing_email": "[email protected]",
+  "default_repository_permission": "none",
+  "members_can_create_repositories": false,
+  "two_factor_requirement_enabled": false,
+  "members_allowed_repository_creation_type": "none",
+  "members_can_create_public_repositories": false,
+  "members_can_create_private_repositories": false,
+  "members_can_create_internal_repositories": false,
+  "members_can_create_pages": true,
+  "members_can_fork_private_repositories": false,
+  "web_commit_signoff_required": false,
+  "members_can_create_public_pages": true,
+  "members_can_create_private_pages": true,
+  "plan": {
+    "name": "free",
+    "space": 976562499,
+    "private_repos": 10000,
+    "filled_seats": 50,
+    "seats": 3
+  },
+  "advanced_security_enabled_for_new_repositories": false,
+  "dependabot_alerts_enabled_for_new_repositories": false,
+  "dependabot_security_updates_enabled_for_new_repositories": false,
+  "dependency_graph_enabled_for_new_repositories": false,
+  "secret_scanning_enabled_for_new_repositories": false,
+  "secret_scanning_push_protection_enabled_for_new_repositories": false,
+  "secret_scanning_push_protection_custom_link_enabled": false,
+  "secret_scanning_push_protection_custom_link": null,
+  "secret_scanning_validity_checks_enabled": false
+}