Future now protects mutation methods inherited from IVar.

Author: jdantonio

lib/concurrent/future.rb

@@ -107,6 +107,8 @@ def self.execute(opts = {}, &block)
       return Future.new(opts, &block).execute
     end
 
+    protected :set, :fail, :complete
+
     private
 
     # @!visibility private

spec/concurrent/future_spec.rb

@@ -58,6 +58,23 @@ def execute_dereferenceable(subject)
       it_should_behave_like :dereferenceable
     end
 
+    context 'subclassing' do
+      
+      subject{ Future.execute{ 42 } }
+
+      it 'protects #set' do
+        expect{ subject.set(100) }.to raise_error
+      end
+
+      it 'protects #fail' do
+        expect{ subject.fail }.to raise_error
+      end
+
+      it 'protects #complete' do
+        expect{ subject.complete(true, 100, nil) }.to raise_error
+      end
+    end
+
     context '#initialize' do
 
       it 'sets the state to :unscheduled' do
@@ -286,7 +303,6 @@ def reentrant_observer(future)
           obs.value.should eq 42
         end
       end
-
     end
   end
 end