1 files changed, 51 insertions, 0 deletions
diff --git a/spec/migrations/clean_stages_statuses_migration_spec.rb b/spec/migrations/clean_stages_statuses_migration_spec.rb
new file mode 100644
index 00000000000..38705f8eaae
--- /dev/null
+++ b/spec/migrations/clean_stages_statuses_migration_spec.rb
@@ -0,0 +1,51 @@
+require 'spec_helper'
+require Rails.root.join('db', 'migrate', '20170912113435_clean_stages_statuses_migration.rb')
+
+describe CleanStagesStatusesMigration, :migration, :sidekiq, :redis do
+  let(:migration) { spy('migration') }
+
+  before do
+    allow(Gitlab::BackgroundMigration::MigrateStageStatus)
+      .to receive(:new).and_return(migration)
+  end
+
+  context 'when there are pending background migrations' do
+    it 'processes pending jobs synchronously' do
+      Sidekiq::Testing.disable! do
+        BackgroundMigrationWorker
+          .perform_in(2.minutes, 'MigrateStageStatus', [1, 1])
+        BackgroundMigrationWorker
+          .perform_async('MigrateStageStatus', [1, 1])
+
+        migrate!
+
+        expect(migration).to have_received(:perform).with(1, 1).twice
+      end
+    end
+  end
+
+  context 'when there are no background migrations pending' do
+    it 'does nothing' do
+      Sidekiq::Testing.disable! do
+        migrate!
+
+        expect(migration).not_to have_received(:perform)
+      end
+    end
+  end
+
+  context 'when there are still unmigrated stages afterwards' do
+    let(:stages) { table('ci_stages') }
+
+    before do
+      stages.create!(status: nil, name: 'build')
+      stages.create!(status: nil, name: 'test')
+    end
+
+    it 'migrates statuses sequentially in batches' do
+      migrate!
+
+      expect(migration).to have_received(:perform).once
+    end
+  end
+end