Fix corpus delete by updating corpus fetch

Filter out corpuses to only get :hidden ones

Changelog: fixed
EE: true

ee/app/finders/app_sec/fuzzing/coverage/corpuses_finder.rb

@@ -11,7 +11,7 @@ module AppSec
         end
 
         def execute
-          AppSec::Fuzzing::Coverage::Corpus.by_project_id(project)
+          AppSec::Fuzzing::Coverage::Corpus.by_project_id_and_status_hidden(project)
         end
       end
     end

ee/app/models/app_sec/fuzzing/coverage/corpus.rb

@@ -18,8 +18,8 @@ module AppSec
 
         validates :package_id, uniqueness: true
 
-        scope :by_project_id, -> (project_id) do
-          joins(:package).where(package: { project_id: project_id })
+        scope :by_project_id_and_status_hidden, -> (project_id) do
+          joins(:package).where(package: { project_id: project_id, status: :hidden })
         end
 
         def audit_details

ee/config/feature_flags/development/corpus_management.yml

@@ -5,4 +5,4 @@ rollout_issue_url:
 milestone: '13.9'
 type: development
 group: group::fuzz testing
-default_enabled: false
+default_enabled: false
\ No newline at end of file

ee/spec/factories/app_sec/fuzzing/coverage/corpuses.rb

@@ -4,6 +4,6 @@ FactoryBot.define do
   factory :corpus, class: 'AppSec::Fuzzing::Coverage::Corpus' do
     user
     project
-    package { association(:generic_package, :with_zip_file, project: project) }
+    package { association(:generic_package, :with_zip_file, project: project, status: :hidden) }
   end
 end

ee/spec/models/app_sec/fuzzing/coverage/corpus_spec.rb

@@ -3,9 +3,7 @@
 require 'spec_helper'
 
 RSpec.describe AppSec::Fuzzing::Coverage::Corpus, type: :model do
-  let(:corpus) { create(:corpus) }
-
-  subject { corpus }
+  subject(:corpus) { create(:corpus) }
 
   describe 'associations' do
     it { is_expected.to belong_to(:package).class_name('Packages::Package') }
@@ -75,15 +73,27 @@ RSpec.describe AppSec::Fuzzing::Coverage::Corpus, type: :model do
   end
 
   describe 'scopes' do
-    describe 'by_project_id' do
-      it 'includes the correct records' do
-        another_corpus_profile = create(:corpus)
+    describe '.by_project_id_and_status_hidden' do
+      subject(:find_corpuses) { described_class.by_project_id_and_status_hidden(corpus.package.project_id) }
+
+      context 'with another_corpus having different project_id' do
+        it 'includes the correct records' do
+          another_corpus = create(:corpus)
 
-        result = described_class.by_project_id(subject.package.project_id)
+          aggregate_failures do
+            expect(find_corpuses).to include(corpus)
+            expect(find_corpuses).not_to include(another_corpus)
+          end
+        end
+      end
+
+      context "with another_corpus having same project with different status apart from hidden" do
+        before do
+          corpus.package.update!(status: :pending_destruction)
+        end
 
-        aggregate_failures do
-          expect(result).to include(subject)
-          expect(result).not_to include(another_corpus_profile)
+        it 'includes the correct records' do
+          expect(find_corpuses).not_to include(corpus)
         end
       end
     end