1 files changed, 75 insertions, 0 deletions
diff --git a/spec/migrations/add_projects_emails_enabled_column_data_spec.rb b/spec/migrations/add_projects_emails_enabled_column_data_spec.rb
new file mode 100644
index 00000000000..1d021ecd439
--- /dev/null
+++ b/spec/migrations/add_projects_emails_enabled_column_data_spec.rb
@@ -0,0 +1,75 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+require 'rake_helper'
+require_migration!
+
+RSpec.describe AddProjectsEmailsEnabledColumnData, :migration, feature_category: :database do
+  before :all do
+    Rake.application.rake_require 'active_record/railties/databases'
+    Rake.application.rake_require 'tasks/gitlab/db'
+
+    # empty task as env is already loaded
+    Rake::Task.define_task :environment
+  end
+
+  let(:migration) { described_class::MIGRATION }
+  let(:project_settings) { table(:project_settings) }
+  let(:projects) { table(:projects) }
+  let(:namespaces) { table(:namespaces) }
+
+  before do
+    stub_const("#{described_class.name}::SUB_BATCH_SIZE", 2)
+  end
+
+  it 'schedules background migrations', :aggregate_failures do
+    migrate!
+
+    expect(migration).to have_scheduled_batched_migration(
+      table_name: :projects,
+      column_name: :id,
+      interval: described_class::DELAY_INTERVAL
+    )
+  end
+
+  describe '#down' do
+    it 'deletes all batched migration records' do
+      migrate!
+      schema_migrate_down!
+
+      expect(migration).not_to have_scheduled_batched_migration
+    end
+  end
+
+  it 'sets emails_enabled to be the opposite of emails_disabled' do
+    disabled_records_to_migrate = 4
+    enabled_records_to_migrate  = 2
+
+    disabled_records_to_migrate.times do |i|
+      namespace = namespaces.create!(name: 'namespace', path: "namespace#{i}")
+      project = projects.create!(name: "Project Disabled #{i}",
+        path: "projectDisabled#{i}",
+        namespace_id: namespace.id,
+        project_namespace_id: namespace.id,
+        emails_disabled: true)
+      project_settings.create!(project_id: project.id)
+    end
+
+    enabled_records_to_migrate.times do |i|
+      namespace = namespaces.create!(name: 'namespace', path: "namespace#{i}")
+      project = projects.create!(name: "Project Enabled #{i}",
+        path: "projectEnabled#{i}",
+        namespace_id: namespace.id,
+        project_namespace_id: namespace.id,
+        emails_disabled: false)
+      project_settings.create!(project_id: project.id)
+    end
+
+    migrate!
+    run_rake_task('gitlab:db:execute_batched_migrations')
+    # rubocop: disable CodeReuse/ActiveRecord
+    expect(project_settings.where(emails_enabled: true).count).to eq(enabled_records_to_migrate)
+    expect(project_settings.where(emails_enabled: false).count).to eq(disabled_records_to_migrate)
+    # rubocop: enable CodeReuse/ActiveRecord
+  end
+end