LockFreeLinkedSet: always return self in <<

Author: ianks

lib/concurrent/edge/lock_free_linked_set.rb

@@ -55,7 +55,8 @@ def add(item)
       #
       #   @return [Oject] the set on which the :<< method was invoked
       def <<(item)
-        self if add item
+        add item
+        self
       end
 
       # @!macro [attach] lock_free_linked_list_method_contains

spec/concurrent/edge/lock_free_linked_set_spec.rb

@@ -44,6 +44,11 @@
     it 'appends to the linked set and returns self' do
       expect(subject << 'test string1').to be_a described_class
     end
+
+    it 'returns self regardless of whether it was logically added' do
+      subject << 'test string'
+      expect(subject << 'test string').to be_a described_class
+    end
   end
 
   describe '#contains?' do