Add tests

spec/jobs/grant_all_badges_spec.rb

@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+RSpec.describe Jobs::GrantAllBadges do
+  it "schedules a GrantBadge job for each badge" do
+    described_class.new.execute({})
+
+    expect(Jobs::GrantBadge.jobs.size).to eq(Badge.enabled.size)
+  end
+end

spec/jobs/grant_badge_spec.rb

@@ -0,0 +1,28 @@
+# frozen_string_literal: true
+
+RSpec.describe Jobs::GrantBadge do
+  subject(:job) { described_class.new }
+
+  let(:scheduled_jobs) { Sidekiq::ScheduledSet.new }
+
+  before { scheduled_jobs.clear }
+
+  it "schedules a EnsureBadgeConsistency job" do
+    Sidekiq::Testing.disable! do
+      badge_ids = Badge.enabled.pluck(:id)
+
+      threads =
+        badge_ids[...3].map do |badge_id|
+          Thread.new { described_class.new.execute({ badge_id: badge_id }) }
+        end
+
+      # EnsureBadgeConsistency may be scheduled or not at this point, but it must
+      # not be scheduled more than once
+      expect(scheduled_jobs.size).to be <= 1
+
+      threads.each(&:join)
+
+      expect(scheduled_jobs.size).to eq(1)
+    end
+  end
+end