Test that a blocked entrust causes a retry

tests/acceptance/fakes/dest/close_after_writes.rb

@@ -0,0 +1,27 @@
+#!/usr/bin/env ruby
+# encoding: utf-8
+
+# Open a server, accept a client, then we expect a single write
+# followed by an entrust.  However, we disconnect after the write so
+# the entrust will fail.  We expect a reconnection.
+
+require 'flexnbd/fake_dest'
+include FlexNBD
+
+addr, port, src_pid = *ARGV
+server = FakeDest.new( addr, port )
+client = server.accept
+
+client.write_hello
+req = client.read_request
+data = client.read_data( req[:len] )
+
+Process.kill("STOP", src_pid.to_i)
+client.write_reply( req[:handle], 0 )
+client.close
+Process.kill("CONT", src_pid.to_i)
+
+client2 = server.accept
+client2.close
+
+exit(0)