1 files changed, 68 insertions, 0 deletions
diff --git a/spec/migrations/change_public_projects_cost_factor_spec.rb b/spec/migrations/change_public_projects_cost_factor_spec.rb
new file mode 100644
index 00000000000..78030736093
--- /dev/null
+++ b/spec/migrations/change_public_projects_cost_factor_spec.rb
@@ -0,0 +1,68 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+require_migration!
+
+RSpec.describe ChangePublicProjectsCostFactor, :migration do
+  # This is a workaround to force the migration to run against the
+  # `gitlab_ci` schema. Otherwise it only runs against `gitlab_main`.
+  around do |example| # rubocop: disable Style/MultilineIfModifier
+    with_reestablished_active_record_base do
+      reconfigure_db_connection(name: :ci)
+      example.run
+    end
+  end if Gitlab::Database.has_config?(:ci)
+
+  let(:runners) { table(:ci_runners) }
+
+  let!(:shared_1) { runners.create!(runner_type: 1, public_projects_minutes_cost_factor: 0) }
+  let!(:shared_2) { runners.create!(runner_type: 1, public_projects_minutes_cost_factor: 0) }
+  let!(:shared_3) { runners.create!(runner_type: 1, public_projects_minutes_cost_factor: 1) }
+  let!(:group_1)  { runners.create!(runner_type: 2, public_projects_minutes_cost_factor: 0) }
+
+  describe '#up' do
+    context 'when on SaaS' do
+      before do
+        allow(Gitlab).to receive(:com?).and_return(true)
+      end
+
+      it 'updates the cost factor from 0 only for shared runners', :aggregate_failures do
+        migrate!
+
+        expect(shared_1.reload.public_projects_minutes_cost_factor).to eq(0.008)
+        expect(shared_2.reload.public_projects_minutes_cost_factor).to eq(0.008)
+        expect(shared_3.reload.public_projects_minutes_cost_factor).to eq(1)
+        expect(group_1.reload.public_projects_minutes_cost_factor).to eq(0)
+      end
+    end
+
+    context 'when on self-managed', :aggregate_failures do
+      it 'skips the migration' do
+        migrate!
+
+        expect(shared_1.public_projects_minutes_cost_factor).to eq(0)
+        expect(shared_2.public_projects_minutes_cost_factor).to eq(0)
+        expect(shared_3.public_projects_minutes_cost_factor).to eq(1)
+        expect(group_1.public_projects_minutes_cost_factor).to eq(0)
+      end
+    end
+  end
+
+  describe '#down' do
+    context 'when on SaaS' do
+      before do
+        allow(Gitlab).to receive(:com?).and_return(true)
+      end
+
+      it 'resets the cost factor to 0 only for shared runners that were updated', :aggregate_failures do
+        migrate!
+        schema_migrate_down!
+
+        expect(shared_1.public_projects_minutes_cost_factor).to eq(0)
+        expect(shared_2.public_projects_minutes_cost_factor).to eq(0)
+        expect(shared_3.public_projects_minutes_cost_factor).to eq(1)
+        expect(group_1.public_projects_minutes_cost_factor).to eq(0)
+      end
+    end
+  end
+end