patch 8.0.0024
Problem:    When the netbeans channel closes, "DETACH" is put in the output
            part. (Ozaki Kiichi)
Solution:   Write "DETACH" in the socket part.
diff --git a/src/testdir/test_netbeans.vim b/src/testdir/test_netbeans.vim
index 77fc2bc..7bffeb2 100644
--- a/src/testdir/test_netbeans.vim
+++ b/src/testdir/test_netbeans.vim
@@ -35,6 +35,7 @@
   nbclose
 
   call WaitFor('len(readfile("Xnetbeans")) > 6')
+  call assert_false(has("netbeans_enabled"))
   let lines = readfile("Xnetbeans")
   call assert_equal('AUTH bunny', lines[0])
   call assert_equal('0:version=0 "2.5"', lines[1])