1 files changed, 64 insertions, 0 deletions
diff --git a/spec/migrations/20220204095121_backfill_namespace_statistics_with_dependency_proxy_size_spec.rb b/spec/migrations/20220204095121_backfill_namespace_statistics_with_dependency_proxy_size_spec.rb
new file mode 100644
index 00000000000..39398fa058d
--- /dev/null
+++ b/spec/migrations/20220204095121_backfill_namespace_statistics_with_dependency_proxy_size_spec.rb
@@ -0,0 +1,64 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+require_migration!
+
+RSpec.describe BackfillNamespaceStatisticsWithDependencyProxySize do
+  let_it_be(:groups) { table(:namespaces) }
+  let_it_be(:group1) { groups.create!(id: 10, name: 'test1', path: 'test1', type: 'Group') }
+  let_it_be(:group2) { groups.create!(id: 20, name: 'test2', path: 'test2', type: 'Group') }
+  let_it_be(:group3) { groups.create!(id: 30, name: 'test3', path: 'test3', type: 'Group') }
+  let_it_be(:group4) { groups.create!(id: 40, name: 'test4', path: 'test4', type: 'Group') }
+
+  let_it_be(:dependency_proxy_blobs) { table(:dependency_proxy_blobs) }
+  let_it_be(:dependency_proxy_manifests) { table(:dependency_proxy_manifests) }
+
+  let_it_be(:group1_manifest) { create_manifest(10, 10) }
+  let_it_be(:group2_manifest) { create_manifest(20, 20) }
+  let_it_be(:group3_manifest) { create_manifest(30, 30) }
+
+  let_it_be(:group1_blob) { create_blob(10, 10) }
+  let_it_be(:group2_blob) { create_blob(20, 20) }
+  let_it_be(:group3_blob) { create_blob(30, 30) }
+
+  describe '#up' do
+    it 'correctly schedules background migrations' do
+      stub_const("#{described_class}::BATCH_SIZE", 2)
+
+      Sidekiq::Testing.fake! do
+        freeze_time do
+          migrate!
+
+          aggregate_failures do
+            expect(described_class::MIGRATION)
+              .to be_scheduled_migration([10, 30], ['dependency_proxy_size'])
+
+            expect(described_class::MIGRATION)
+              .to be_scheduled_delayed_migration(2.minutes, [20], ['dependency_proxy_size'])
+
+            expect(BackgroundMigrationWorker.jobs.size).to eq(2)
+          end
+        end
+      end
+    end
+  end
+
+  def create_manifest(group_id, size)
+    dependency_proxy_manifests.create!(
+      group_id: group_id,
+      size: size,
+      file_name: 'test-file',
+      file: 'test',
+      digest: 'abc123'
+    )
+  end
+
+  def create_blob(group_id, size)
+    dependency_proxy_blobs.create!(
+      group_id: group_id,
+      size: size,
+      file_name: 'test-file',
+      file: 'test'
+    )
+  end
+end