FIX: distributed cache leak and potential infinite loop

spec/components/distributed_cache_spec.rb

@@ -11,6 +11,37 @@ describe DistributedCache do
     DistributedCache.new("test")
   end
 
+  def add_throw_away_cache
+    c = DistributedCache.new("test")
+    c["foofoo"] = "bar"
+  end
+
+  it 'correctly clears up caches' do
+    start = DistributedCache.subscribers.length
+
+    add_throw_away_cache
+    GC.start
+    cache1["foofoo"] = "bar1"
+    wait_for do
+      cache2["foofoo"] == "bar1"
+    end
+
+    DistributedCache.subscribers.length.should == start
+  end
+
+  it 'does not leak state across caches' do
+    c2 = DistributedCache.new("test1")
+    c3 = DistributedCache.new("test1")
+    c2["hi"] = "hi"
+    wait_for do
+      c3["hi"] == "hi"
+    end
+
+    Thread.pass
+    cache1["hi"].should == nil
+
+  end
+
   it 'allows coerces symbol keys to strings' do
     cache1[:key] = "test"
     cache1["key"].should == "test"