Add rake task to reset queued jobs

Please note that the spec is using Redis as Sidekiq does. This revealed
that Sidekiq wasn't set up for jobs in the test environment properly.

.env.test

@@ -1,6 +1,8 @@
 # ENV vars for the test environment
 # Override locally with `.env.test.local`
 
+OFN_REDIS_JOBS_URL="redis://localhost:6379/2"
+
 SECRET_TOKEN="xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
 STRIPE_INSTANCE_SECRET_KEY="bogus_key"
 STRIPE_CUSTOMER="bogus_customer"

lib/tasks/reset.rake

@@ -0,0 +1,27 @@
+# frozen_string_literal: true
+
+require 'sidekiq/api'
+
+namespace :ofn do
+  task reset: :environment do
+    Rake::Task["ofn:reset_sidekiq"].invoke
+    Rake::Task["db:reset"].invoke
+  end
+
+  task reset_sidekiq: :environment do
+    # Clear retry set
+    Sidekiq::RetrySet.new.clear
+
+    # Clear scheduled jobs
+    Sidekiq::ScheduledSet.new.clear
+
+    # Clear 'Dead' jobs statistics
+    Sidekiq::DeadSet.new.clear
+
+    # Clear 'Processed' and 'Failed' jobs statistics
+    Sidekiq::Stats.new.reset
+
+    # Clear all queues
+    Sidekiq::Queue.all.map(&:clear)
+  end
+end

spec/lib/tasks/reset_spec.rb

@@ -0,0 +1,26 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+require 'rake'
+
+describe "reset.rake" do
+  before(:all) do
+    Rake.application.rake_require("tasks/reset")
+    Rake::Task.define_task(:environment)
+  end
+
+  it "clears job queues" do
+    job_class = Class.new do
+      include Sidekiq::Job
+    end
+    job_class.perform_async
+
+    queue = Sidekiq::Queue.all.first # rubocop:disable Rails/RedundantActiveRecordAllMethod
+
+    expect {
+      Rake.application.invoke_task "ofn:reset_sidekiq"
+    }.to change {
+      queue.count
+    }.to(0)
+  end
+end