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+;;; cl-print-tests.el --- Test suite for the cl-print facility.  -*- lexical-binding:t -*-
+
+;; Copyright (C) 2017 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 <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;;; Code:
+
+(require 'ert)
+
+(cl-defstruct cl-print--test a b)
+
+(ert-deftest cl-print-tests-1 ()
+  "Test cl-print code."
+  (let ((x (make-cl-print--test :a 1 :b 2)))
+    (let ((print-circle nil))
+      (should (equal (cl-prin1-to-string `((x . ,x) (y . ,x)))
+                     "((x . #s(cl-print--test :a 1 :b 2)) (y . #s(cl-print--test :a 1 :b 2)))")))
+    (let ((print-circle t))
+      (should (equal (cl-prin1-to-string `((x . ,x) (y . ,x)))
+                     "((x . #1=#s(cl-print--test :a 1 :b 2)) (y . #1#))")))
+    (should (string-match "\\`#f(compiled-function (x) .*\n\n.*)\\'"
+                          (cl-prin1-to-string (symbol-function #'caar))))))
+
+(ert-deftest cl-print-tests-2 ()
+  (let ((x (record 'foo 1 2 3)))
+    (should (equal
+             x
+             (car (read-from-string (with-output-to-string (prin1 x))))))
+    (let ((print-circle t))
+      (should (string-match
+               "\\`(#1=#s(foo 1 2 3) #1#)\\'"
+               (cl-prin1-to-string (list x x)))))))
+
+(ert-deftest cl-print-circle ()
+  (let ((x '(#1=(a . #1#) #1#)))
+    (let ((print-circle nil))
+      (should (string-match "\\`((a . #[0-9]) (a . #[0-9]))\\'"
+                            (cl-prin1-to-string x))))
+    (let ((print-circle t))
+      (should (equal "(#1=(a . #1#) #1#)" (cl-prin1-to-string x))))))
+
+;;; cl-print-tests.el ends here.