fusermount: Use _parse_help, add basic test case.

completions/fuse

@@ -20,7 +20,7 @@ _fusermount()
     esac
 
     if [[ "$cur" == -* ]] ; then
-        COMPREPLY=( $( compgen -W '-h -V -o -u -q -z' -- "$cur" ) )
+        COMPREPLY=( $( compgen -W '$( _parse_help "$1" -h )' -- "$cur" ) )
     else
         _filedir -d
     fi

test/completion/fusermount.exp

@@ -0,0 +1 @@
+assert_source_completions fusermount

test/lib/completions/fusermount.exp

@@ -0,0 +1,20 @@
+proc setup {} {
+    save_env
+}
+
+
+proc teardown {} {
+    assert_env_unmodified
+}
+
+
+setup
+
+
+assert_complete_any "fusermount "
+
+
+sync_after_int
+
+
+teardown