test suite: Add tar xvf filename test case

Author: scop

test/lib/completions/tar.exp

@@ -59,6 +59,10 @@ set test "old option: create and members"
 assert_complete_dir "dir/ dir2/ archive.tar.xz escape.tar" "tar cTfvv NOT_EXISTS DONT_CREATE.tar " $::srcdir/fixtures/tar
 sync_after_int
 
+set test "old option: extract and archive"
+assert_complete_dir "dir/ dir2/ archive.tar.xz escape.tar" "tar xvf " $::srcdir/fixtures/tar
+sync_after_int
+
 if { "$tar_version" == "gnu" } {
     set test "check short options"
     assert_complete_any "tar -c"