feat: locking and retry in FB message parsing (#7701)

spec/lib/redis/lock_manager_spec.rb

@@ -0,0 +1,48 @@
+require 'rails_helper'
+
+RSpec.describe Redis::LockManager do
+  let(:lock_manager) { described_class.new }
+  let(:lock_key) { 'test_lock' }
+
+  after do
+    # Cleanup: Ensure that the lock key is deleted after each test to avoid interference
+    Redis::Alfred.delete(lock_key)
+  end
+
+  describe '#lock' do
+    it 'acquires a lock and returns true' do
+      expect(lock_manager.lock(lock_key)).to be true
+      expect(lock_manager.locked?(lock_key)).to be true
+    end
+
+    it 'returns false if the lock is already acquired' do
+      lock_manager.lock(lock_key)
+      expect(lock_manager.lock(lock_key)).to be false
+    end
+
+    it 'can acquire a lock again after the timeout' do
+      lock_manager.lock(lock_key, 1) # 1-second timeout
+      sleep 2
+      expect(lock_manager.lock(lock_key)).to be true
+    end
+  end
+
+  describe '#unlock' do
+    it 'releases a lock' do
+      lock_manager.lock(lock_key)
+      lock_manager.unlock(lock_key)
+      expect(lock_manager.locked?(lock_key)).to be false
+    end
+  end
+
+  describe '#locked?' do
+    it 'returns true if a key is locked' do
+      lock_manager.lock(lock_key)
+      expect(lock_manager.locked?(lock_key)).to be true
+    end
+
+    it 'returns false if a key is not locked' do
+      expect(lock_manager.locked?(lock_key)).to be false
+    end
+  end
+end