RUBY-2132 cleanup stress test (#1943)

Co-authored-by: Oleg Pudeyev <oleg@bsdpower.com>

Author: p-mongo

spec/stress/cleanup_spec.rb

@@ -0,0 +1,43 @@
+require 'spec_helper'
+
+describe 'Cleanup stress test' do
+  require_stress
+
+  let(:options) do
+    SpecConfig.instance.all_test_options
+  end
+
+  before(:all) do
+    # load if necessary
+    ClusterConfig.instance.primary_address
+    ClientRegistry.instance.close_all_clients
+  end
+
+  context 'single client disconnect/reconnect' do
+    let(:client) do
+      new_local_client([ClusterConfig.instance.primary_address.seed], options)
+    end
+
+    it 'cleans up' do
+      client
+
+      start_resources = resources
+
+      100.times do
+        client.close
+        client.reconnect
+      end
+
+      end_resources = resources
+
+      end_resources.should == start_resources
+    end
+  end
+
+  def resources
+    {
+      open_file_count: Dir["/proc/#{Process.pid}/fd/*"].count,
+      running_thread_count: Thread.list.select { |thread| thread.status == 'run' }.count,
+    }
+  end
+end