Move spec/rubyspec to spec/ruby for consistency

* Other ruby implementations use the spec/ruby directory.
  [Misc #13792] [ruby-core:82287]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59979 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

spec/ruby/library/thread/shared/queue/num_waiting.rb

@@ -0,0 +1,16 @@
+describe :queue_num_waiting, shared: true do
+  it "reports the number of threads waiting on the queue" do
+    q = @object.call
+    threads = []
+
+    5.times do |i|
+      q.num_waiting.should == i
+      t = Thread.new { q.deq }
+      Thread.pass until q.num_waiting == i+1
+      threads << t
+    end
+
+    threads.each { q.enq Object.new }
+    threads.each {|t| t.join }
+  end
+end