Make sure we return an empty list when no reviews

I couldn't reproduce the problem described in hub4j#1768 but I thought we
could add a test anyway as it doesn't cost us much.

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

@@ -231,14 +231,18 @@ public void closePullRequest() throws Exception {
     public void pullRequestReviews() throws Exception {
         String name = "testPullRequestReviews";
         GHPullRequest p = getRepository().createPullRequest(name, "test/stable", "main", "## test");
+
+        List<GHPullRequestReview> reviews = p.listReviews().toList();
+        assertThat(reviews.size(), is(0));
+
         GHPullRequestReview draftReview = p.createReview()
                 .body("Some draft review")
                 .comment("Some niggle", "README.md", 1)
                 .create();
         assertThat(draftReview.getState(), is(GHPullRequestReviewState.PENDING));
         assertThat(draftReview.getBody(), is("Some draft review"));
         assertThat(draftReview.getCommitId(), notNullValue());
-        List<GHPullRequestReview> reviews = p.listReviews().toList();
+        reviews = p.listReviews().toList();
         assertThat(reviews.size(), is(1));
         GHPullRequestReview review = reviews.get(0);
         assertThat(review.getState(), is(GHPullRequestReviewState.PENDING));

src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/pullRequestReviews/__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": "hub4jtestorgemail@could.be.null.com",
+  "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": "kk@kohsuke.org",
+  "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
+}

src/test/resources/org/kohsuke/github/GHPullRequestTest/wiremock/pullRequestReviews/__files/10-r_h_g_pulls_475_reviews_1926195021.json

@@ -0,0 +1,38 @@
+{
+  "id": 1926195021,
+  "node_id": "PRR_kwDODFTdCc5yz2dN",
+  "user": {
+    "login": "gsmet",
+    "id": 1279749,
+    "node_id": "MDQ6VXNlcjEyNzk3NDk=",
+    "avatar_url": "https://avatars.githubusercontent.com/u/1279749?u=e462a6165ea17647aed446ca31fae604338ae18c&v=4",
+    "gravatar_id": "",
+    "url": "https://api.github.com/users/gsmet",
+    "html_url": "https://github.com/gsmet",
+    "followers_url": "https://api.github.com/users/gsmet/followers",
+    "following_url": "https://api.github.com/users/gsmet/following{/other_user}",
+    "gists_url": "https://api.github.com/users/gsmet/gists{/gist_id}",
+    "starred_url": "https://api.github.com/users/gsmet/starred{/owner}{/repo}",
+    "subscriptions_url": "https://api.github.com/users/gsmet/subscriptions",
+    "organizations_url": "https://api.github.com/users/gsmet/orgs",
+    "repos_url": "https://api.github.com/users/gsmet/repos",
+    "events_url": "https://api.github.com/users/gsmet/events{/privacy}",
+    "received_events_url": "https://api.github.com/users/gsmet/received_events",
+    "type": "User",
+    "site_admin": false
+  },
+  "body": "Some new review",
+  "state": "PENDING",
+  "html_url": "https://github.com/hub4j-test-org/github-api/pull/475#pullrequestreview-1926195021",
+  "pull_request_url": "https://api.github.com/repos/hub4j-test-org/github-api/pulls/475",
+  "author_association": "MEMBER",
+  "_links": {
+    "html": {
+      "href": "https://github.com/hub4j-test-org/github-api/pull/475#pullrequestreview-1926195021"
+    },
+    "pull_request": {
+      "href": "https://api.github.com/repos/hub4j-test-org/github-api/pulls/475"
+    }
+  },
+  "commit_id": "07374fe73aff1c2024a8d4114b32406c7a8e89b7"
+}