[GITEA] Fix NPE in `ToPullReviewList`

- Add condition to ensure doer isn't nil when using it.
- Added unit test.
- Resolves #2055

(cherry picked from commit 8f1a74fb29)
(cherry picked from commit 60ac881776)
(cherry picked from commit 5fdc461ac5)

services/convert/pull_review.go

@@ -66,7 +66,7 @@ func ToPullReviewList(ctx context.Context, rl []*issues_model.Review, doer *user
 	result := make([]*api.PullReview, 0, len(rl))
 	for i := range rl {
 		// show pending reviews only for the user who created them
-		if rl[i].Type == issues_model.ReviewTypePending && !(doer.IsAdmin || doer.ID == rl[i].ReviewerID) {
+		if rl[i].Type == issues_model.ReviewTypePending && (doer == nil || !(doer.IsAdmin || doer.ID == rl[i].ReviewerID)) {
 			continue
 		}
 		r, err := ToPullReview(ctx, rl[i], doer)

services/convert/pull_test.go

@@ -12,6 +12,7 @@ import (
 	access_model "code.gitea.io/gitea/models/perm/access"
 	repo_model "code.gitea.io/gitea/models/repo"
 	"code.gitea.io/gitea/models/unittest"
+	user_model "code.gitea.io/gitea/models/user"
 	"code.gitea.io/gitea/modules/git"
 	"code.gitea.io/gitea/modules/structs"
 
@@ -47,3 +48,30 @@ func TestPullRequest_APIFormat(t *testing.T) {
 	assert.Nil(t, apiPullRequest.Head.Repository)
 	assert.EqualValues(t, -1, apiPullRequest.Head.RepoID)
 }
+
+func TestPullReviewList(t *testing.T) {
+	assert.NoError(t, unittest.PrepareTestDatabase())
+
+	t.Run("Pending review", func(t *testing.T) {
+		reviewer := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 2})
+		review := unittest.AssertExistsAndLoadBean(t, &issues_model.Review{ID: 6, ReviewerID: reviewer.ID})
+		rl := []*issues_model.Review{review}
+
+		t.Run("Anonymous", func(t *testing.T) {
+			prList, err := ToPullReviewList(db.DefaultContext, rl, nil)
+			assert.NoError(t, err)
+			assert.Empty(t, prList)
+		})
+		t.Run("Reviewer", func(t *testing.T) {
+			prList, err := ToPullReviewList(db.DefaultContext, rl, reviewer)
+			assert.NoError(t, err)
+			assert.Len(t, prList, 1)
+		})
+		t.Run("Admin", func(t *testing.T) {
+			adminUser := unittest.AssertExistsAndLoadBean(t, &user_model.User{IsAdmin: true}, unittest.Cond("id != ?", reviewer.ID))
+			prList, err := ToPullReviewList(db.DefaultContext, rl, adminUser)
+			assert.NoError(t, err)
+			assert.Len(t, prList, 1)
+		})
+	})
+}