Use lexical-binding in more tests

* test/lib-src/emacsclient-tests.el:
* test/lisp/emacs-lisp/hierarchy-tests.el:
* test/lisp/eshell/eshell-tests.el:
* test/lisp/gnus/gnus-util-tests.el:
* test/lisp/progmodes/js-tests.el:
* test/lisp/textmodes/bibtex-tests.el:
* test/src/editfns-tests.el:
* test/src/fns-tests.el: Use lexical-binding.

* test/lisp/emacs-lisp/hierarchy-tests.el
(hierarchy-leafs-includes-lonely-roots):
* test/src/editfns-tests.el (transpose-test-get-byte-positions):
* test/src/fns-tests.el (fns-tests-func-arity):
Adjust for lexical-binding.

1 files changed, 3 insertions, 1 deletions

diff --git a/test/lisp/eshell/eshell-tests.el b/test/lisp/eshell/eshell-tests.el
index 16a04647723..1b93fb0fbbc 100644
--- a/test/lisp/eshell/eshell-tests.el
+++ b/test/lisp/eshell/eshell-tests.el
@@ -1,4 +1,4 @@
-;;; tests/eshell-tests.el --- Eshell test suite
+;;; tests/eshell-tests.el --- Eshell test suite  -*- lexical-binding:t -*-
 
 ;; Copyright (C) 1999-2020 Free Software Foundation, Inc.
 
@@ -61,6 +61,8 @@
   (eshell-insert-command text func)
   (eshell-match-result regexp))
 
+(defvar eshell-history-file-name)
+
 (defun eshell-test-command-result (command)
   "Like `eshell-command-result', but not using HOME."
   (let ((eshell-directory-name (make-temp-file "eshell" t))