1 files changed, 71 insertions, 0 deletions
diff --git a/spec/migrations/swap_sent_notifications_id_columns_spec.rb b/spec/migrations/swap_sent_notifications_id_columns_spec.rb
new file mode 100644
index 00000000000..2f681a2a587
--- /dev/null
+++ b/spec/migrations/swap_sent_notifications_id_columns_spec.rb
@@ -0,0 +1,71 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+require_migration!
+
+RSpec.describe SwapSentNotificationsIdColumns, feature_category: :database do
+  describe '#up' do
+    before do
+      # A we call `schema_migrate_down!` before each example, and for this migration
+      # `#down` is same as `#up`, we need to ensure we start from the expected state.
+      connection = described_class.new.connection
+      connection.execute('ALTER TABLE sent_notifications ALTER COLUMN id TYPE integer')
+      connection.execute('ALTER TABLE sent_notifications ALTER COLUMN id_convert_to_bigint TYPE bigint')
+      # rubocop: disable RSpec/AnyInstanceOf
+      allow_any_instance_of(described_class).to receive(:com_or_dev_or_test_but_not_jh?).and_return(run_migration?)
+      # rubocop: enable RSpec/AnyInstanceOf
+    end
+
+    context 'when we are GitLab.com, dev, or test' do
+      let(:run_migration?) { true }
+
+      it 'swaps the integer and bigint columns' do
+        sent_notifications = table(:sent_notifications)
+
+        disable_migrations_output do
+          reversible_migration do |migration|
+            migration.before -> {
+              sent_notifications.reset_column_information
+
+              expect(sent_notifications.columns.find { |c| c.name == 'id' }.sql_type).to eq('integer')
+              expect(sent_notifications.columns.find { |c| c.name == 'id_convert_to_bigint' }.sql_type).to eq('bigint')
+            }
+
+            migration.after -> {
+              sent_notifications.reset_column_information
+
+              expect(sent_notifications.columns.find { |c| c.name == 'id' }.sql_type).to eq('bigint')
+              expect(sent_notifications.columns.find { |c| c.name == 'id_convert_to_bigint' }.sql_type).to eq('integer')
+            }
+          end
+        end
+      end
+    end
+
+    context 'when we are NOT GitLab.com, dev, or test' do
+      let(:run_migration?) { false }
+
+      it 'does not swap the integer and bigint columns' do
+        sent_notifications = table(:sent_notifications)
+
+        disable_migrations_output do
+          reversible_migration do |migration|
+            migration.before -> {
+              sent_notifications.reset_column_information
+
+              expect(sent_notifications.columns.find { |c| c.name == 'id' }.sql_type).to eq('integer')
+              expect(sent_notifications.columns.find { |c| c.name == 'id_convert_to_bigint' }.sql_type).to eq('bigint')
+            }
+
+            migration.after -> {
+              sent_notifications.reset_column_information
+
+              expect(sent_notifications.columns.find { |c| c.name == 'id' }.sql_type).to eq('integer')
+              expect(sent_notifications.columns.find { |c| c.name == 'id_convert_to_bigint' }.sql_type).to eq('bigint')
+            }
+          end
+        end
+      end
+    end
+  end
+end