1 files changed, 58 insertions, 0 deletions
diff --git a/spec/migrations/20201014205300_drop_backfill_jira_tracker_deployment_type_jobs_spec.rb b/spec/migrations/20201014205300_drop_backfill_jira_tracker_deployment_type_jobs_spec.rb
new file mode 100644
index 00000000000..134bea6b666
--- /dev/null
+++ b/spec/migrations/20201014205300_drop_backfill_jira_tracker_deployment_type_jobs_spec.rb
@@ -0,0 +1,58 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+require Rails.root.join('db', 'migrate', '20201014205300_drop_backfill_jira_tracker_deployment_type_jobs.rb')
+
+RSpec.describe DropBackfillJiraTrackerDeploymentTypeJobs, :sidekiq, :redis, schema: 2020_10_14_205300 do
+  subject(:migration) { described_class.new }
+
+  describe '#up' do
+    let(:retry_set) { Sidekiq::RetrySet.new }
+    let(:scheduled_set) { Sidekiq::ScheduledSet.new }
+
+    context 'there are only affected jobs on the queue' do
+      let(:payload) { { 'class' => ::BackgroundMigrationWorker, 'args' => [described_class::DROPPED_JOB_CLASS, 1] } }
+      let(:queue_payload) { payload.merge('queue' => described_class::QUEUE) }
+
+      it 'removes enqueued BackfillJiraTrackerDeploymentType background jobs' do
+        Sidekiq::Testing.disable! do # https://github.com/mperham/sidekiq/wiki/testing#api Sidekiq's API does not have a testing mode
+          retry_set.schedule(1.hour.from_now, payload)
+          scheduled_set.schedule(1.hour.from_now, payload)
+          Sidekiq::Client.push(queue_payload)
+
+          expect { migration.up }.to change { Sidekiq::Queue.new(described_class::QUEUE).size }.from(1).to(0)
+          expect(retry_set.size).to eq(0)
+          expect(scheduled_set.size).to eq(0)
+        end
+      end
+    end
+
+    context 'there are not any affected jobs on the queue' do
+      let(:payload) { { 'class' => ::BackgroundMigrationWorker, 'args' => ['SomeOtherClass', 1] } }
+      let(:queue_payload) { payload.merge('queue' => described_class::QUEUE) }
+
+      it 'skips other enqueued jobs' do
+        Sidekiq::Testing.disable! do
+          retry_set.schedule(1.hour.from_now, payload)
+          scheduled_set.schedule(1.hour.from_now, payload)
+          Sidekiq::Client.push(queue_payload)
+
+          expect { migration.up }.not_to change { Sidekiq::Queue.new(described_class::QUEUE).size }
+          expect(retry_set.size).to eq(1)
+          expect(scheduled_set.size).to eq(1)
+        end
+      end
+    end
+
+    context 'other queues' do
+      it 'does not modify them' do
+        Sidekiq::Testing.disable! do
+          Sidekiq::Client.push('queue' => 'other', 'class' => ::BackgroundMigrationWorker, 'args' => ['SomeOtherClass', 1])
+          Sidekiq::Client.push('queue' => 'other', 'class' => ::BackgroundMigrationWorker, 'args' => [described_class::DROPPED_JOB_CLASS, 1])
+
+          expect { migration.up }.not_to change { Sidekiq::Queue.new('other').size }
+        end
+      end
+    end
+  end
+end