1 files changed, 49 insertions, 0 deletions
diff --git a/spec/migrations/start_backfill_ci_queuing_tables_spec.rb b/spec/migrations/start_backfill_ci_queuing_tables_spec.rb
new file mode 100644
index 00000000000..0a189b58c94
--- /dev/null
+++ b/spec/migrations/start_backfill_ci_queuing_tables_spec.rb
@@ -0,0 +1,49 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+require_migration!
+
+RSpec.describe StartBackfillCiQueuingTables, :suppress_gitlab_schemas_validate_connection,
+  feature_category: :continuous_integration do
+  let(:namespaces) { table(:namespaces) }
+  let(:projects)   { table(:projects) }
+  let(:builds)     { table(:ci_builds) }
+
+  let!(:namespace) do
+    namespaces.create!(name: 'namespace1', path: 'namespace1')
+  end
+
+  let!(:project) do
+    projects.create!(namespace_id: namespace.id, name: 'test1', path: 'test1')
+  end
+
+  let!(:pending_build_1) do
+    builds.create!(status: :pending, name: 'test1', type: 'Ci::Build', project_id: project.id)
+  end
+
+  let!(:running_build) do
+    builds.create!(status: :running, name: 'test2', type: 'Ci::Build', project_id: project.id)
+  end
+
+  let!(:pending_build_2) do
+    builds.create!(status: :pending, name: 'test3', type: 'Ci::Build', project_id: project.id)
+  end
+
+  before do
+    stub_const("#{described_class.name}::BATCH_SIZE", 1)
+  end
+
+  it 'schedules jobs for builds that are pending' do
+    Sidekiq::Testing.fake! do
+      freeze_time do
+        migrate!
+
+        expect(described_class::MIGRATION).to be_scheduled_delayed_migration(
+          2.minutes, pending_build_1.id, pending_build_1.id)
+        expect(described_class::MIGRATION).to be_scheduled_delayed_migration(
+          4.minutes, pending_build_2.id, pending_build_2.id)
+        expect(BackgroundMigrationWorker.jobs.size).to eq(2)
+      end
+    end
+  end
+end