Create a diff deletion worker scheduler to avoid long-running post-migration

1 files changed, 43 insertions, 0 deletions

diff --git a/spec/lib/gitlab/background_migration/schedule_diff_files_deletion_spec.rb b/spec/lib/gitlab/background_migration/schedule_diff_files_deletion_spec.rb
new file mode 100644
index 00000000000..a699571ca90
--- /dev/null
+++ b/spec/lib/gitlab/background_migration/schedule_diff_files_deletion_spec.rb
@@ -0,0 +1,43 @@
+require 'spec_helper'
+
+describe Gitlab::BackgroundMigration::ScheduleDiffFilesDeletion, :migration, schema: 20180619121030 do
+  describe '#perform' do
+    let(:merge_request_diffs) { table(:merge_request_diffs) }
+    let(:merge_requests) { table(:merge_requests) }
+    let(:namespaces) { table(:namespaces) }
+    let(:projects) { table(:projects) }
+
+    before do
+      stub_const("#{described_class.name}::BATCH_SIZE", 3)
+
+      namespaces.create!(id: 1, name: 'gitlab', path: 'gitlab')
+      projects.create!(id: 1, namespace_id: 1, name: 'gitlab', path: 'gitlab')
+
+      merge_requests.create!(id: 1, target_project_id: 1, source_project_id: 1, target_branch: 'feature', source_branch: 'master', state: 'merged')
+
+      merge_request_diffs.create!(id: 1, merge_request_id: 1)
+      merge_request_diffs.create!(id: 2, merge_request_id: 1)
+      merge_request_diffs.create!(id: 3, merge_request_id: 1)
+      merge_request_diffs.create!(id: 4, merge_request_id: 1)
+      merge_request_diffs.create!(id: 5, merge_request_id: 1)
+    end
+
+    it 'correctly schedules diff file deletion workers' do
+      Sidekiq::Testing.fake! do
+        Timecop.freeze do
+          described_class.new.perform([1, 2, 3, 4, 5], 1)
+
+          [1, 2, 3].each do |id|
+            expect(described_class::MIGRATION).to be_scheduled_delayed_migration(10.minutes, id)
+          end
+
+          [4, 5].each do |id|
+            expect(described_class::MIGRATION).to be_scheduled_delayed_migration(11.minutes, id)
+          end
+
+          expect(BackgroundMigrationWorker.jobs.size).to eq(5)
+        end
+      end
+    end
+  end
+end