3 files changed, 128 insertions, 0 deletions
diff --git a/test/lisp/eshell/em-ls-tests.el b/test/lisp/eshell/em-ls-tests.el
index 1ce832f1dcc..c5c9eac3249 100644
--- a/test/lisp/eshell/em-ls-tests.el
+++ b/test/lisp/eshell/em-ls-tests.el
@@ -26,6 +26,7 @@
 
 (require 'ert)
 (require 'em-ls)
+(require 'dired)
 
 (ert-deftest em-ls-test-bug27631 ()
   "Test for https://debbugs.gnu.org/27631 ."
diff --git a/test/lisp/eshell/esh-opt-tests.el b/test/lisp/eshell/esh-opt-tests.el
new file mode 100644
index 00000000000..13b522b389e
--- /dev/null
+++ b/test/lisp/eshell/esh-opt-tests.el
@@ -0,0 +1,124 @@
+;;; tests/esh-opt-tests.el --- esh-opt test suite
+
+;; Copyright (C) 2018 Free Software Foundation, Inc.
+
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs is free software: you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; GNU Emacs is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.
+
+;;; Code:
+
+(require 'ert)
+(require 'esh-opt)
+
+(ert-deftest esh-opt-process-args-test ()
+  "Unit tests which verify correct behavior of `eshell--process-args'."
+  (should
+   (equal '(t)
+          (eshell--process-args
+           "sudo"
+           '("-a")
+           '((?a "all" nil show-all "")))))
+  (should
+   (equal '(nil)
+          (eshell--process-args
+           "sudo"
+           '("-g")
+           '((?a "all" nil show-all "")))))
+  (should
+   (equal '("root" "world")
+          (eshell--process-args
+           "sudo"
+           '("-u" "root" "world")
+           '((?u "user" t user "execute a command as another USER")))))
+  (should
+   (equal '(nil "emerge" "-uDN" "world")
+          (eshell--process-args
+           "sudo"
+           '("emerge" "-uDN" "world")
+           '((?u "user" t user "execute a command as another USER")
+             :parse-leading-options-only))))
+  (should
+   (equal '("root" "emerge" "-uDN" "world")
+          (eshell--process-args
+           "sudo"
+           '("-u" "root" "emerge" "-uDN" "world")
+           '((?u "user" t user "execute a command as another USER")
+             :parse-leading-options-only))))
+  (should
+   (equal '("world" "emerge")
+          (eshell--process-args
+           "sudo"
+           '("-u" "root" "emerge" "-uDN" "world")
+           '((?u "user" t user "execute a command as another USER"))))))
+
+(ert-deftest test-eshell-eval-using-options ()
+  "Tests for `eshell-eval-using-options'."
+  (eshell-eval-using-options
+   "sudo" '("-u" "root" "whoami")
+   '((?u "user" t user "execute a command as another USER")
+     :parse-leading-options-only)
+   (should (equal user "root")))
+  (eshell-eval-using-options
+   "sudo" '("--user" "root" "whoami")
+   '((?u "user" t user "execute a command as another USER")
+     :parse-leading-options-only)
+   (should (equal user "root")))
+
+  (eshell-eval-using-options
+   "sudo" '("emerge" "-uDN" "world")
+   '((?u "user" t user "execute a command as another USER"))
+   (should (equal user "world")))
+  (eshell-eval-using-options
+   "sudo" '("emerge" "-uDN" "world")
+   '((?u "user" t user "execute a command as another USER")
+     :parse-leading-options-only)
+   (should (eq user nil)))
+
+  (eshell-eval-using-options
+   "ls" '("-I" "*.txt" "/dev/null")
+   '((?I "ignore" t ignore-pattern
+	 "do not list implied entries matching pattern"))
+   (should (equal ignore-pattern "*.txt")))
+
+  (eshell-eval-using-options
+   "ls" '("-l" "/dev/null")
+   '((?l nil long-listing listing-style
+	 "use a long listing format"))
+   (should (eql listing-style 'long-listing)))
+  (eshell-eval-using-options
+   "ls" '("/dev/null")
+   '((?l nil long-listing listing-style
+	 "use a long listing format"))
+   (should (eq listing-style nil)))
+
+  (eshell-eval-using-options
+   "ls" '("/dev/null" "-h")
+   '((?h "human-readable" 1024 human-readable
+	 "print sizes in human readable format"))
+   (should (eql human-readable 1024)))
+  (eshell-eval-using-options
+   "ls" '("/dev/null" "--human-readable")
+   '((?h "human-readable" 1024 human-readable
+	 "print sizes in human readable format"))
+   (should (eql human-readable 1024)))
+  (eshell-eval-using-options
+   "ls" '("/dev/null")
+   '((?h "human-readable" 1024 human-readable
+	 "print sizes in human readable format"))
+   (should (eq human-readable nil))))
+
+(provide 'esh-opt-tests)
+
+;;; esh-opt-tests.el ends here
diff --git a/test/lisp/eshell/eshell-tests.el b/test/lisp/eshell/eshell-tests.el
index b6dbd09a3d6..330dd87ae4c 100644
--- a/test/lisp/eshell/eshell-tests.el
+++ b/test/lisp/eshell/eshell-tests.el
@@ -31,6 +31,9 @@
 (defmacro with-temp-eshell (&rest body)
   "Evaluate BODY in a temporary Eshell buffer."
   `(let* ((eshell-directory-name (make-temp-file "eshell" t))
+          ;; We want no history file, so prevent Eshell from falling
+          ;; back on $HISTFILE.
+          (process-environment (cons "HISTFILE" process-environment))
           (eshell-history-file-name nil)
           (eshell-buffer (eshell t)))
      (unwind-protect