1 files changed, 21 insertions, 0 deletions
diff --git a/spec/migrations/drop_alerts_service_data_spec.rb b/spec/migrations/drop_alerts_service_data_spec.rb
new file mode 100644
index 00000000000..b2128da938f
--- /dev/null
+++ b/spec/migrations/drop_alerts_service_data_spec.rb
@@ -0,0 +1,21 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+require Rails.root.join('db', 'post_migrate', '20210205213933_drop_alerts_service_data.rb')
+
+RSpec.describe DropAlertsServiceData do
+  let_it_be(:alerts_service_data) { table(:alerts_service_data) }
+
+  it 'correctly migrates up and down' do
+    reversible_migration do |migration|
+      migration.before -> {
+        expect(alerts_service_data.create!(service_id: 1)).to be_a alerts_service_data
+      }
+
+      migration.after -> {
+        expect { alerts_service_data.create!(service_id: 1) }
+          .to raise_error(ActiveRecord::StatementInvalid, /UndefinedTable/)
+      }
+    end
+  end
+end