test/automated/ert-tests.el

   1 ;;; ert-tests.el --- ERT's self-tests
   2
   3 ;; Copyright (C) 2007-2008, 2010-2011 Free Software Foundation, Inc.
   4
   5 ;; Author: Christian Ohler <ohler@gnu.org>
   6
   7 ;; This file is part of GNU Emacs.
   8
   9 ;; This program is free software: you can redistribute it and/or
  10 ;; modify it under the terms of the GNU General Public License as
  11 ;; published by the Free Software Foundation, either version 3 of the
  12 ;; License, or (at your option) any later version.
  13 ;;
  14 ;; This program is distributed in the hope that it will be useful, but
  15 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
  16 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17 ;; General Public License for more details.
  18 ;;
  19 ;; You should have received a copy of the GNU General Public License
  20 ;; along with this program.  If not, see `http://www.gnu.org/licenses/'.
  21
  22 ;;; Commentary:
  23
  24 ;; This file is part of ERT, the Emacs Lisp Regression Testing tool.
  25 ;; See ert.el or the texinfo manual for more details.
  26
  27 ;;; Code:
  28
  29 (eval-when-compile
  30   (require 'cl))
  31 (require 'ert)
  32
  33
  34 ;;; Self-test that doesn't rely on ERT, for bootstrapping.
  35
  36 ;; This is used to test that bodies actually run.
  37 (defvar ert--test-body-was-run)
  38 (ert-deftest ert-test-body-runs ()
  39   (setq ert--test-body-was-run t))
  40
  41 (defun ert-self-test ()
  42   "Run ERT's self-tests and make sure they actually ran."
  43   (let ((window-configuration (current-window-configuration)))
  44     (let ((ert--test-body-was-run nil))
  45       ;; The buffer name chosen here should not compete with the default
  46       ;; results buffer name for completion in `switch-to-buffer'.
  47       (let ((stats (ert-run-tests-interactively "^ert-" " *ert self-tests*")))
  48         (assert ert--test-body-was-run)
  49         (if (zerop (ert-stats-completed-unexpected stats))
  50             ;; Hide results window only when everything went well.
  51             (set-window-configuration window-configuration)
  52           (error "ERT self-test failed"))))))
  53
  54 (defun ert-self-test-and-exit ()
  55   "Run ERT's self-tests and exit Emacs.
  56
  57 The exit code will be zero if the tests passed, nonzero if they
  58 failed or if there was a problem."
  59   (unwind-protect
  60       (progn
  61         (ert-self-test)
  62         (kill-emacs 0))
  63     (unwind-protect
  64         (progn
  65           (message "Error running tests")
  66           (backtrace))
  67       (kill-emacs 1))))
  68
  69
  70 ;;; Further tests are defined using ERT.
  71
  72 (ert-deftest ert-test-nested-test-body-runs ()
  73   "Test that nested test bodies run."
  74   (lexical-let ((was-run nil))
  75     (let ((test (make-ert-test :body (lambda ()
  76                                        (setq was-run t)))))
  77       (assert (not was-run))
  78       (ert-run-test test)
  79       (assert was-run))))
  80
  81
  82 ;;; Test that pass/fail works.
  83 (ert-deftest ert-test-pass ()
  84   (let ((test (make-ert-test :body (lambda ()))))
  85     (let ((result (ert-run-test test)))
  86       (assert (ert-test-passed-p result)))))
  87
  88 (ert-deftest ert-test-fail ()
  89   (let ((test (make-ert-test :body (lambda () (ert-fail "failure message")))))
  90     (let ((result (let ((ert-debug-on-error nil))
  91                     (ert-run-test test))))
  92       (assert (ert-test-failed-p result) t)
  93       (assert (equal (ert-test-result-with-condition-condition result)
  94                      '(ert-test-failed "failure message"))
  95               t))))
  96
  97 (ert-deftest ert-test-fail-debug-with-condition-case ()
  98   (let ((test (make-ert-test :body (lambda () (ert-fail "failure message")))))
  99     (condition-case condition
 100         (progn
 101           (let ((ert-debug-on-error t))
 102             (ert-run-test test))
 103           (assert nil))
 104       ((error)
 105        (assert (equal condition '(ert-test-failed "failure message")) t)))))
 106
 107 (ert-deftest ert-test-fail-debug-with-debugger-1 ()
 108   (let ((test (make-ert-test :body (lambda () (ert-fail "failure message")))))
 109     (let ((debugger (lambda (&rest debugger-args)
 110                       (assert nil))))
 111       (let ((ert-debug-on-error nil))
 112         (ert-run-test test)))))
 113
 114 (ert-deftest ert-test-fail-debug-with-debugger-2 ()
 115   (let ((test (make-ert-test :body (lambda () (ert-fail "failure message")))))
 116     (block nil
 117       (let ((debugger (lambda (&rest debugger-args)
 118                         (return-from nil nil))))
 119         (let ((ert-debug-on-error t))
 120           (ert-run-test test))
 121         (assert nil)))))
 122
 123 (ert-deftest ert-test-fail-debug-nested-with-debugger ()
 124   (let ((test (make-ert-test :body (lambda ()
 125                                      (let ((ert-debug-on-error t))
 126                                        (ert-fail "failure message"))))))
 127     (let ((debugger (lambda (&rest debugger-args)
 128                       (assert nil nil "Assertion a"))))
 129       (let ((ert-debug-on-error nil))
 130         (ert-run-test test))))
 131   (let ((test (make-ert-test :body (lambda ()
 132                                      (let ((ert-debug-on-error nil))
 133                                        (ert-fail "failure message"))))))
 134     (block nil
 135       (let ((debugger (lambda (&rest debugger-args)
 136                         (return-from nil nil))))
 137         (let ((ert-debug-on-error t))
 138           (ert-run-test test))
 139         (assert nil nil "Assertion b")))))
 140
 141 (ert-deftest ert-test-error ()
 142   (let ((test (make-ert-test :body (lambda () (error "Error message")))))
 143     (let ((result (let ((ert-debug-on-error nil))
 144                     (ert-run-test test))))
 145       (assert (ert-test-failed-p result) t)
 146       (assert (equal (ert-test-result-with-condition-condition result)
 147                      '(error "Error message"))
 148               t))))
 149
 150 (ert-deftest ert-test-error-debug ()
 151   (let ((test (make-ert-test :body (lambda () (error "Error message")))))
 152     (condition-case condition
 153         (progn
 154           (let ((ert-debug-on-error t))
 155             (ert-run-test test))
 156           (assert nil))
 157       ((error)
 158        (assert (equal condition '(error "Error message")) t)))))
 159
 160
 161 ;;; Test that `should' works.
 162 (ert-deftest ert-test-should ()
 163   (let ((test (make-ert-test :body (lambda () (should nil)))))
 164     (let ((result (let ((ert-debug-on-error nil))
 165                     (ert-run-test test))))
 166       (assert (ert-test-failed-p result) t)
 167       (assert (equal (ert-test-result-with-condition-condition result)
 168                      '(ert-test-failed ((should nil) :form nil :value nil)))
 169               t)))
 170   (let ((test (make-ert-test :body (lambda () (should t)))))
 171     (let ((result (ert-run-test test)))
 172       (assert (ert-test-passed-p result) t))))
 173
 174 (ert-deftest ert-test-should-value ()
 175   (should (eql (should 'foo) 'foo))
 176   (should (eql (should 'bar) 'bar)))
 177
 178 (ert-deftest ert-test-should-not ()
 179   (let ((test (make-ert-test :body (lambda () (should-not t)))))
 180     (let ((result (let ((ert-debug-on-error nil))
 181                     (ert-run-test test))))
 182       (assert (ert-test-failed-p result) t)
 183       (assert (equal (ert-test-result-with-condition-condition result)
 184                      '(ert-test-failed ((should-not t) :form t :value t)))
 185               t)))
 186   (let ((test (make-ert-test :body (lambda () (should-not nil)))))
 187     (let ((result (ert-run-test test)))
 188       (assert (ert-test-passed-p result)))))
 189
 190 (ert-deftest ert-test-should-with-macrolet ()
 191   (let ((test (make-ert-test :body (lambda ()
 192                                      (macrolet ((foo () `(progn t nil)))
 193                                        (should (foo)))))))
 194     (let ((result (let ((ert-debug-on-error nil))
 195                     (ert-run-test test))))
 196       (should (ert-test-failed-p result))
 197       (should (equal
 198                (ert-test-result-with-condition-condition result)
 199                '(ert-test-failed ((should (foo))
 200                                   :form (progn t nil)
 201                                   :value nil)))))))
 202
 203 (ert-deftest ert-test-should-error ()
 204   ;; No error.
 205   (let ((test (make-ert-test :body (lambda () (should-error (progn))))))
 206     (let ((result (let ((ert-debug-on-error nil))
 207                     (ert-run-test test))))
 208       (should (ert-test-failed-p result))
 209       (should (equal (ert-test-result-with-condition-condition result)
 210                      '(ert-test-failed
 211                        ((should-error (progn))
 212                         :form (progn)
 213                         :value nil
 214                         :fail-reason "did not signal an error"))))))
 215   ;; A simple error.
 216   (should (equal (should-error (error "Foo"))
 217                  '(error "Foo")))
 218   ;; Error of unexpected type.
 219   (let ((test (make-ert-test :body (lambda ()
 220                                      (should-error (error "Foo")
 221                                                    :type 'singularity-error)))))
 222     (let ((result (ert-run-test test)))
 223       (should (ert-test-failed-p result))
 224       (should (equal
 225                (ert-test-result-with-condition-condition result)
 226                '(ert-test-failed
 227                  ((should-error (error "Foo") :type 'singularity-error)
 228                   :form (error "Foo")
 229                   :condition (error "Foo")
 230                   :fail-reason
 231                   "the error signalled did not have the expected type"))))))
 232   ;; Error of the expected type.
 233   (let* ((error nil)
 234          (test (make-ert-test
 235                 :body (lambda ()
 236                         (setq error
 237                               (should-error (signal 'singularity-error nil)
 238                                             :type 'singularity-error))))))
 239     (let ((result (ert-run-test test)))
 240       (should (ert-test-passed-p result))
 241       (should (equal error '(singularity-error))))))
 242
 243 (ert-deftest ert-test-should-error-subtypes ()
 244   (should-error (signal 'singularity-error nil)
 245                 :type 'singularity-error
 246                 :exclude-subtypes t)
 247   (let ((test (make-ert-test
 248                :body (lambda ()
 249                        (should-error (signal 'arith-error nil)
 250                                      :type 'singularity-error)))))
 251     (let ((result (ert-run-test test)))
 252       (should (ert-test-failed-p result))
 253       (should (equal
 254                (ert-test-result-with-condition-condition result)
 255                '(ert-test-failed
 256                  ((should-error (signal 'arith-error nil)
 257                                 :type 'singularity-error)
 258                   :form (signal arith-error nil)
 259                   :condition (arith-error)
 260                   :fail-reason
 261                   "the error signalled did not have the expected type"))))))
 262   (let ((test (make-ert-test
 263                :body (lambda ()
 264                        (should-error (signal 'arith-error nil)
 265                                      :type 'singularity-error
 266                                      :exclude-subtypes t)))))
 267     (let ((result (ert-run-test test)))
 268       (should (ert-test-failed-p result))
 269       (should (equal
 270                (ert-test-result-with-condition-condition result)
 271                '(ert-test-failed
 272                  ((should-error (signal 'arith-error nil)
 273                                 :type 'singularity-error
 274                                 :exclude-subtypes t)
 275                   :form (signal arith-error nil)
 276                   :condition (arith-error)
 277                   :fail-reason
 278                   "the error signalled did not have the expected type"))))))
 279   (let ((test (make-ert-test
 280                :body (lambda ()
 281                        (should-error (signal 'singularity-error nil)
 282                                      :type 'arith-error
 283                                      :exclude-subtypes t)))))
 284     (let ((result (ert-run-test test)))
 285       (should (ert-test-failed-p result))
 286       (should (equal
 287                (ert-test-result-with-condition-condition result)
 288                '(ert-test-failed
 289                  ((should-error (signal 'singularity-error nil)
 290                                 :type 'arith-error
 291                                 :exclude-subtypes t)
 292                   :form (signal singularity-error nil)
 293                   :condition (singularity-error)
 294                   :fail-reason
 295                   "the error signalled was a subtype of the expected type")))))
 296     ))
 297
 298 (defmacro ert--test-my-list (&rest args)
 299   "Don't use this.  Instead, call `list' with ARGS, it does the same thing.
 300
 301 This macro is used to test if macroexpansion in `should' works."
 302   `(list ,@args))
 303
 304 (ert-deftest ert-test-should-failure-debugging ()
 305   "Test that `should' errors contain the information we expect them to."
 306   (loop for (body expected-condition) in
 307         `((,(lambda () (let ((x nil)) (should x)))
 308            (ert-test-failed ((should x) :form x :value nil)))
 309           (,(lambda () (let ((x t)) (should-not x)))
 310            (ert-test-failed ((should-not x) :form x :value t)))
 311           (,(lambda () (let ((x t)) (should (not x))))
 312            (ert-test-failed ((should (not x)) :form (not t) :value nil)))
 313           (,(lambda () (let ((x nil)) (should-not (not x))))
 314            (ert-test-failed ((should-not (not x)) :form (not nil) :value t)))
 315           (,(lambda () (let ((x t) (y nil)) (should-not
 316                                              (ert--test-my-list x y))))
 317            (ert-test-failed
 318             ((should-not (ert--test-my-list x y))
 319              :form (list t nil)
 320              :value (t nil))))
 321           (,(lambda () (let ((x t)) (should (error "Foo"))))
 322            (error "Foo")))
 323         do
 324         (let ((test (make-ert-test :body body)))
 325           (condition-case actual-condition
 326               (progn
 327                 (let ((ert-debug-on-error t))
 328                   (ert-run-test test))
 329                 (assert nil))
 330             ((error)
 331              (should (equal actual-condition expected-condition)))))))
 332
 333 (ert-deftest ert-test-deftest ()
 334   (should (equal (macroexpand '(ert-deftest abc () "foo" :tags '(bar)))
 335                  '(progn
 336                     (ert-set-test 'abc
 337                                   (make-ert-test :name 'abc
 338                                                  :documentation "foo"
 339                                                  :tags '(bar)
 340                                                  :body (lambda ())))
 341                     (push '(ert-deftest . abc) current-load-list)
 342                     'abc)))
 343   (should (equal (macroexpand '(ert-deftest def ()
 344                                  :expected-result ':passed))
 345                  '(progn
 346                     (ert-set-test 'def
 347                                   (make-ert-test :name 'def
 348                                                  :expected-result-type ':passed
 349                                                  :body (lambda ())))
 350                     (push '(ert-deftest . def) current-load-list)
 351                     'def)))
 352   ;; :documentation keyword is forbidden
 353   (should-error (macroexpand '(ert-deftest ghi ()
 354                                 :documentation "foo"))))
 355
 356 (ert-deftest ert-test-record-backtrace ()
 357   (let ((test (make-ert-test :body (lambda () (ert-fail "foo")))))
 358     (let ((result (ert-run-test test)))
 359       (should (ert-test-failed-p result))
 360       (with-temp-buffer
 361         (ert--print-backtrace (ert-test-failed-backtrace result))
 362         (goto-char (point-min))
 363         (end-of-line)
 364         (let ((first-line (buffer-substring-no-properties (point-min) (point))))
 365           (should (equal first-line "  signal(ert-test-failed (\"foo\"))")))))))
 366
 367 (ert-deftest ert-test-messages ()
 368   :tags '(:causes-redisplay)
 369   (let* ((message-string "Test message")
 370          (messages-buffer (get-buffer-create "*Messages*"))
 371          (test (make-ert-test :body (lambda () (message "%s" message-string)))))
 372     (with-current-buffer messages-buffer
 373       (let ((result (ert-run-test test)))
 374         (should (equal (concat message-string "\n")
 375                        (ert-test-result-messages result)))))))
 376
 377 (ert-deftest ert-test-running-tests ()
 378   (let ((outer-test (ert-get-test 'ert-test-running-tests)))
 379     (should (equal (ert-running-test) outer-test))
 380     (let (test1 test2 test3)
 381       (setq test1 (make-ert-test
 382                    :name "1"
 383                    :body (lambda ()
 384                            (should (equal (ert-running-test) outer-test))
 385                            (should (equal ert--running-tests
 386                                           (list test1 test2 test3
 387                                                 outer-test)))))
 388             test2 (make-ert-test
 389                    :name "2"
 390                    :body (lambda ()
 391                            (should (equal (ert-running-test) outer-test))
 392                            (should (equal ert--running-tests
 393                                           (list test3 test2 outer-test)))
 394                            (ert-run-test test1)))
 395             test3 (make-ert-test
 396                    :name "3"
 397                    :body (lambda ()
 398                            (should (equal (ert-running-test) outer-test))
 399                            (should (equal ert--running-tests
 400                                           (list test3 outer-test)))
 401                            (ert-run-test test2))))
 402       (should (ert-test-passed-p (ert-run-test test3))))))
 403
 404 (ert-deftest ert-test-test-result-expected-p ()
 405   "Test `ert-test-result-expected-p' and (implicitly) `ert-test-result-type-p'."
 406   ;; passing test
 407   (let ((test (make-ert-test :body (lambda ()))))
 408     (should (ert-test-result-expected-p test (ert-run-test test))))
 409   ;; unexpected failure
 410   (let ((test (make-ert-test :body (lambda () (ert-fail "failed")))))
 411     (should-not (ert-test-result-expected-p test (ert-run-test test))))
 412   ;; expected failure
 413   (let ((test (make-ert-test :body (lambda () (ert-fail "failed"))
 414                              :expected-result-type ':failed)))
 415     (should (ert-test-result-expected-p test (ert-run-test test))))
 416   ;; `not' expected type
 417   (let ((test (make-ert-test :body (lambda ())
 418                              :expected-result-type '(not :failed))))
 419     (should (ert-test-result-expected-p test (ert-run-test test))))
 420   (let ((test (make-ert-test :body (lambda ())
 421                              :expected-result-type '(not :passed))))
 422     (should-not (ert-test-result-expected-p test (ert-run-test test))))
 423   ;; `and' expected type
 424   (let ((test (make-ert-test :body (lambda ())
 425                              :expected-result-type '(and :passed :failed))))
 426     (should-not (ert-test-result-expected-p test (ert-run-test test))))
 427   (let ((test (make-ert-test :body (lambda ())
 428                              :expected-result-type '(and :passed
 429                                                          (not :failed)))))
 430     (should (ert-test-result-expected-p test (ert-run-test test))))
 431   ;; `or' expected type
 432   (let ((test (make-ert-test :body (lambda ())
 433                              :expected-result-type '(or (and :passed :failed)
 434                                                         :passed))))
 435     (should (ert-test-result-expected-p test (ert-run-test test))))
 436   (let ((test (make-ert-test :body (lambda ())
 437                              :expected-result-type '(or (and :passed :failed)
 438                                                         nil (not t)))))
 439     (should-not (ert-test-result-expected-p test (ert-run-test test)))))
 440
 441 ;;; Test `ert-select-tests'.
 442 (ert-deftest ert-test-select-regexp ()
 443   (should (equal (ert-select-tests "^ert-test-select-regexp$" t)
 444                  (list (ert-get-test 'ert-test-select-regexp)))))
 445
 446 (ert-deftest ert-test-test-boundp ()
 447   (should (ert-test-boundp 'ert-test-test-boundp))
 448   (should-not (ert-test-boundp (make-symbol "ert-not-a-test"))))
 449
 450 (ert-deftest ert-test-select-member ()
 451   (should (equal (ert-select-tests '(member ert-test-select-member) t)
 452                  (list (ert-get-test 'ert-test-select-member)))))
 453
 454 (ert-deftest ert-test-select-test ()
 455   (should (equal (ert-select-tests (ert-get-test 'ert-test-select-test) t)
 456                  (list (ert-get-test 'ert-test-select-test)))))
 457
 458 (ert-deftest ert-test-select-symbol ()
 459   (should (equal (ert-select-tests 'ert-test-select-symbol t)
 460                  (list (ert-get-test 'ert-test-select-symbol)))))
 461
 462 (ert-deftest ert-test-select-and ()
 463   (let ((test (make-ert-test
 464                :name nil
 465                :body nil
 466                :most-recent-result (make-ert-test-failed
 467                                     :condition nil
 468                                     :backtrace nil
 469                                     :infos nil))))
 470     (should (equal (ert-select-tests `(and (member ,test) :failed) t)
 471                    (list test)))))
 472
 473 (ert-deftest ert-test-select-tag ()
 474   (let ((test (make-ert-test
 475                :name nil
 476                :body nil
 477                :tags '(a b))))
 478     (should (equal (ert-select-tests `(tag a) (list test)) (list test)))
 479     (should (equal (ert-select-tests `(tag b) (list test)) (list test)))
 480     (should (equal (ert-select-tests `(tag c) (list test)) '()))))
 481
 482
 483 ;;; Tests for utility functions.
 484 (ert-deftest ert-test-proper-list-p ()
 485   (should (ert--proper-list-p '()))
 486   (should (ert--proper-list-p '(1)))
 487   (should (ert--proper-list-p '(1 2)))
 488   (should (ert--proper-list-p '(1 2 3)))
 489   (should (ert--proper-list-p '(1 2 3 4)))
 490   (should (not (ert--proper-list-p 'a)))
 491   (should (not (ert--proper-list-p '(1 . a))))
 492   (should (not (ert--proper-list-p '(1 2 . a))))
 493   (should (not (ert--proper-list-p '(1 2 3 . a))))
 494   (should (not (ert--proper-list-p '(1 2 3 4 . a))))
 495   (let ((a (list 1)))
 496     (setf (cdr (last a)) a)
 497     (should (not (ert--proper-list-p a))))
 498   (let ((a (list 1 2)))
 499     (setf (cdr (last a)) a)
 500     (should (not (ert--proper-list-p a))))
 501   (let ((a (list 1 2 3)))
 502     (setf (cdr (last a)) a)
 503     (should (not (ert--proper-list-p a))))
 504   (let ((a (list 1 2 3 4)))
 505     (setf (cdr (last a)) a)
 506     (should (not (ert--proper-list-p a))))
 507   (let ((a (list 1 2)))
 508     (setf (cdr (last a)) (cdr a))
 509     (should (not (ert--proper-list-p a))))
 510   (let ((a (list 1 2 3)))
 511     (setf (cdr (last a)) (cdr a))
 512     (should (not (ert--proper-list-p a))))
 513   (let ((a (list 1 2 3 4)))
 514     (setf (cdr (last a)) (cdr a))
 515     (should (not (ert--proper-list-p a))))
 516   (let ((a (list 1 2 3)))
 517     (setf (cdr (last a)) (cddr a))
 518     (should (not (ert--proper-list-p a))))
 519   (let ((a (list 1 2 3 4)))
 520     (setf (cdr (last a)) (cddr a))
 521     (should (not (ert--proper-list-p a))))
 522   (let ((a (list 1 2 3 4)))
 523     (setf (cdr (last a)) (cdddr a))
 524     (should (not (ert--proper-list-p a)))))
 525
 526 (ert-deftest ert-test-parse-keys-and-body ()
 527   (should (equal (ert--parse-keys-and-body '(foo)) '(nil (foo))))
 528   (should (equal (ert--parse-keys-and-body '(:bar foo)) '((:bar foo) nil)))
 529   (should (equal (ert--parse-keys-and-body '(:bar foo a (b)))
 530                  '((:bar foo) (a (b)))))
 531   (should (equal (ert--parse-keys-and-body '(:bar foo :a (b)))
 532                  '((:bar foo :a (b)) nil)))
 533   (should (equal (ert--parse-keys-and-body '(bar foo :a (b)))
 534                  '(nil (bar foo :a (b)))))
 535   (should-error (ert--parse-keys-and-body '(:bar foo :a))))
 536
 537
 538 (ert-deftest ert-test-run-tests-interactively ()
 539   :tags '(:causes-redisplay)
 540   (let ((passing-test (make-ert-test :name 'passing-test
 541                                      :body (lambda () (ert-pass))))
 542         (failing-test (make-ert-test :name 'failing-test
 543                                      :body (lambda () (ert-fail
 544                                                        "failure message")))))
 545     (let ((ert-debug-on-error nil))
 546       (let* ((buffer-name (generate-new-buffer-name " *ert-test-run-tests*"))
 547              (messages nil)
 548              (mock-message-fn
 549               (lambda (format-string &rest args)
 550                 (push (apply #'format format-string args) messages))))
 551         (save-window-excursion
 552           (unwind-protect
 553               (let ((case-fold-search nil))
 554                 (ert-run-tests-interactively
 555                  `(member ,passing-test ,failing-test) buffer-name
 556                  mock-message-fn)
 557                 (should (equal messages `(,(concat
 558                                             "Ran 2 tests, 1 results were "
 559                                             "as expected, 1 unexpected"))))
 560                 (with-current-buffer buffer-name
 561                   (goto-char (point-min))
 562                   (should (equal
 563                            (buffer-substring (point-min)
 564                                              (save-excursion
 565                                                (forward-line 4)
 566                                                (point)))
 567                            (concat
 568                             "Selector: (member <passing-test> <failing-test>)\n"
 569                             "Passed: 1\n"
 570                             "Failed: 1 (1 unexpected)\n"
 571                             "Total:  2/2\n")))))
 572             (when (get-buffer buffer-name)
 573               (kill-buffer buffer-name))))))))
 574
 575 (ert-deftest ert-test-special-operator-p ()
 576   (should (ert--special-operator-p 'if))
 577   (should-not (ert--special-operator-p 'car))
 578   (should-not (ert--special-operator-p 'ert--special-operator-p))
 579   (let ((b (ert--gensym)))
 580     (should-not (ert--special-operator-p b))
 581     (fset b 'if)
 582     (should (ert--special-operator-p b))))
 583
 584 (ert-deftest ert-test-list-of-should-forms ()
 585   (let ((test (make-ert-test :body (lambda ()
 586                                      (should t)
 587                                      (should (null '()))
 588                                      (should nil)
 589                                      (should t)))))
 590     (let ((result (let ((ert-debug-on-error nil))
 591                     (ert-run-test test))))
 592       (should (equal (ert-test-result-should-forms result)
 593                      '(((should t) :form t :value t)
 594                        ((should (null '())) :form (null nil) :value t)
 595                        ((should nil) :form nil :value nil)))))))
 596
 597 (ert-deftest ert-test-list-of-should-forms-observers-should-not-stack ()
 598   (let ((test (make-ert-test
 599                :body (lambda ()
 600                        (let ((test2 (make-ert-test
 601                                      :body (lambda ()
 602                                              (should t)))))
 603                          (let ((result (ert-run-test test2)))
 604                            (should (ert-test-passed-p result))))))))
 605     (let ((result (let ((ert-debug-on-error nil))
 606                     (ert-run-test test))))
 607       (should (ert-test-passed-p result))
 608       (should (eql (length (ert-test-result-should-forms result))
 609                    1)))))
 610
 611 (ert-deftest ert-test-list-of-should-forms-no-deep-copy ()
 612   (let ((test (make-ert-test :body (lambda ()
 613                                      (let ((obj (list 'a)))
 614                                        (should (equal obj '(a)))
 615                                        (setf (car obj) 'b)
 616                                        (should (equal obj '(b))))))))
 617     (let ((result (let ((ert-debug-on-error nil))
 618                     (ert-run-test test))))
 619       (should (ert-test-passed-p result))
 620       (should (equal (ert-test-result-should-forms result)
 621                      '(((should (equal obj '(a))) :form (equal (b) (a)) :value t
 622                         :explanation nil)
 623                        ((should (equal obj '(b))) :form (equal (b) (b)) :value t
 624                         :explanation nil)
 625                        ))))))
 626
 627 (ert-deftest ert-test-remprop ()
 628   (let ((x (ert--gensym)))
 629     (should (equal (symbol-plist x) '()))
 630     ;; Remove nonexistent property on empty plist.
 631     (ert--remprop x 'b)
 632     (should (equal (symbol-plist x) '()))
 633     (put x 'a 1)
 634     (should (equal (symbol-plist x) '(a 1)))
 635     ;; Remove nonexistent property on nonempty plist.
 636     (ert--remprop x 'b)
 637     (should (equal (symbol-plist x) '(a 1)))
 638     (put x 'b 2)
 639     (put x 'c 3)
 640     (put x 'd 4)
 641     (should (equal (symbol-plist x) '(a 1 b 2 c 3 d 4)))
 642     ;; Remove property that is neither first nor last.
 643     (ert--remprop x 'c)
 644     (should (equal (symbol-plist x) '(a 1 b 2 d 4)))
 645     ;; Remove last property from a plist of length >1.
 646     (ert--remprop x 'd)
 647     (should (equal (symbol-plist x) '(a 1 b 2)))
 648     ;; Remove first property from a plist of length >1.
 649     (ert--remprop x 'a)
 650     (should (equal (symbol-plist x) '(b 2)))
 651     ;; Remove property when there is only one.
 652     (ert--remprop x 'b)
 653     (should (equal (symbol-plist x) '()))))
 654
 655 (ert-deftest ert-test-remove-if-not ()
 656   (let ((list (list 'a 'b 'c 'd))
 657         (i 0))
 658     (let ((result (ert--remove-if-not (lambda (x)
 659                                         (should (eql x (nth i list)))
 660                                         (incf i)
 661                                         (member i '(2 3)))
 662                                       list)))
 663       (should (equal i 4))
 664       (should (equal result '(b c)))
 665       (should (equal list '(a b c d)))))
 666   (should (equal '()
 667                  (ert--remove-if-not (lambda (x) (should nil)) '()))))
 668
 669 (ert-deftest ert-test-remove* ()
 670   (let ((list (list 'a 'b 'c 'd))
 671         (key-index 0)
 672         (test-index 0))
 673     (let ((result
 674            (ert--remove* 'foo list
 675                          :key (lambda (x)
 676                                 (should (eql x (nth key-index list)))
 677                                 (prog1
 678                                     (list key-index x)
 679                                   (incf key-index)))
 680                          :test
 681                          (lambda (a b)
 682                            (should (eql a 'foo))
 683                            (should (equal b (list test-index
 684                                                   (nth test-index list))))
 685                            (incf test-index)
 686                            (member test-index '(2 3))))))
 687       (should (equal key-index 4))
 688       (should (equal test-index 4))
 689       (should (equal result '(a d)))
 690       (should (equal list '(a b c d)))))
 691   (let ((x (cons nil nil))
 692         (y (cons nil nil)))
 693     (should (equal (ert--remove* x (list x y))
 694                    ;; or (list x), since we use `equal' -- the
 695                    ;; important thing is that only one element got
 696                    ;; removed, this proves that the default test is
 697                    ;; `eql', not `equal'
 698                    (list y)))))
 699
 700
 701 (ert-deftest ert-test-set-functions ()
 702   (let ((c1 (cons nil nil))
 703         (c2 (cons nil nil))
 704         (sym (make-symbol "a")))
 705     (let ((e '())
 706           (a (list 'a 'b sym nil "" "x" c1 c2))
 707           (b (list c1 'y 'b sym 'x)))
 708       (should (equal (ert--set-difference e e) e))
 709       (should (equal (ert--set-difference a e) a))
 710       (should (equal (ert--set-difference e a) e))
 711       (should (equal (ert--set-difference a a) e))
 712       (should (equal (ert--set-difference b e) b))
 713       (should (equal (ert--set-difference e b) e))
 714       (should (equal (ert--set-difference b b) e))
 715       (should (equal (ert--set-difference a b) (list 'a nil "" "x" c2)))
 716       (should (equal (ert--set-difference b a) (list 'y 'x)))
 717
 718       ;; We aren't testing whether this is really using `eq' rather than `eql'.
 719       (should (equal (ert--set-difference-eq e e) e))
 720       (should (equal (ert--set-difference-eq a e) a))
 721       (should (equal (ert--set-difference-eq e a) e))
 722       (should (equal (ert--set-difference-eq a a) e))
 723       (should (equal (ert--set-difference-eq b e) b))
 724       (should (equal (ert--set-difference-eq e b) e))
 725       (should (equal (ert--set-difference-eq b b) e))
 726       (should (equal (ert--set-difference-eq a b) (list 'a nil "" "x" c2)))
 727       (should (equal (ert--set-difference-eq b a) (list 'y 'x)))
 728
 729       (should (equal (ert--union e e) e))
 730       (should (equal (ert--union a e) a))
 731       (should (equal (ert--union e a) a))
 732       (should (equal (ert--union a a) a))
 733       (should (equal (ert--union b e) b))
 734       (should (equal (ert--union e b) b))
 735       (should (equal (ert--union b b) b))
 736       (should (equal (ert--union a b) (list 'a 'b sym nil "" "x" c1 c2 'y 'x)))
 737       (should (equal (ert--union b a) (list c1 'y 'b sym 'x 'a nil "" "x" c2)))
 738
 739       (should (equal (ert--intersection e e) e))
 740       (should (equal (ert--intersection a e) e))
 741       (should (equal (ert--intersection e a) e))
 742       (should (equal (ert--intersection a a) a))
 743       (should (equal (ert--intersection b e) e))
 744       (should (equal (ert--intersection e b) e))
 745       (should (equal (ert--intersection b b) b))
 746       (should (equal (ert--intersection a b) (list 'b sym c1)))
 747       (should (equal (ert--intersection b a) (list c1 'b sym))))))
 748
 749 (ert-deftest ert-test-gensym ()
 750   ;; Since the expansion of `should' calls `ert--gensym' and thus has a
 751   ;; side-effect on `ert--gensym-counter', we have to make sure all
 752   ;; macros in our test body are expanded before we rebind
 753   ;; `ert--gensym-counter' and run the body.  Otherwise, the test would
 754   ;; fail if run interpreted.
 755   (let ((body (byte-compile
 756                '(lambda ()
 757                   (should (equal (symbol-name (ert--gensym)) "G0"))
 758                   (should (equal (symbol-name (ert--gensym)) "G1"))
 759                   (should (equal (symbol-name (ert--gensym)) "G2"))
 760                   (should (equal (symbol-name (ert--gensym "foo")) "foo3"))
 761                   (should (equal (symbol-name (ert--gensym "bar")) "bar4"))
 762                   (should (equal ert--gensym-counter 5))))))
 763     (let ((ert--gensym-counter 0))
 764       (funcall body))))
 765
 766 (ert-deftest ert-test-coerce-to-vector ()
 767   (let* ((a (vector))
 768          (b (vector 1 a 3))
 769          (c (list))
 770          (d (list b a)))
 771     (should (eql (ert--coerce-to-vector a) a))
 772     (should (eql (ert--coerce-to-vector b) b))
 773     (should (equal (ert--coerce-to-vector c) (vector)))
 774     (should (equal (ert--coerce-to-vector d) (vector b a)))))
 775
 776 (ert-deftest ert-test-string-position ()
 777   (should (eql (ert--string-position ?x "") nil))
 778   (should (eql (ert--string-position ?a "abc") 0))
 779   (should (eql (ert--string-position ?b "abc") 1))
 780   (should (eql (ert--string-position ?c "abc") 2))
 781   (should (eql (ert--string-position ?d "abc") nil))
 782   (should (eql (ert--string-position ?A "abc") nil)))
 783
 784 (ert-deftest ert-test-mismatch ()
 785   (should (eql (ert--mismatch "" "") nil))
 786   (should (eql (ert--mismatch "" "a") 0))
 787   (should (eql (ert--mismatch "a" "a") nil))
 788   (should (eql (ert--mismatch "ab" "a") 1))
 789   (should (eql (ert--mismatch "Aa" "aA") 0))
 790   (should (eql (ert--mismatch '(a b c) '(a b d)) 2)))
 791
 792 (ert-deftest ert-test-string-first-line ()
 793   (should (equal (ert--string-first-line "") ""))
 794   (should (equal (ert--string-first-line "abc") "abc"))
 795   (should (equal (ert--string-first-line "abc\n") "abc"))
 796   (should (equal (ert--string-first-line "foo\nbar") "foo"))
 797   (should (equal (ert--string-first-line " foo\nbar\nbaz\n") " foo")))
 798
 799 (ert-deftest ert-test-explain-equal ()
 800   (should (equal (ert--explain-equal nil 'foo)
 801                  '(different-atoms nil foo)))
 802   (should (equal (ert--explain-equal '(a a) '(a b))
 803                  '(list-elt 1 (different-atoms a b))))
 804   (should (equal (ert--explain-equal '(1 48) '(1 49))
 805                  '(list-elt 1 (different-atoms (48 "#x30" "?0")
 806                                                (49 "#x31" "?1")))))
 807   (should (equal (ert--explain-equal 'nil '(a))
 808                  '(different-types nil (a))))
 809   (should (equal (ert--explain-equal '(a b c) '(a b c d))
 810                  '(proper-lists-of-different-length 3 4 (a b c) (a b c d)
 811                                                     first-mismatch-at 3)))
 812   (let ((sym (make-symbol "a")))
 813     (should (equal (ert--explain-equal 'a sym)
 814                    `(different-symbols-with-the-same-name a ,sym)))))
 815
 816 (ert-deftest ert-test-explain-equal-improper-list ()
 817   (should (equal (ert--explain-equal '(a . b) '(a . c))
 818                  '(cdr (different-atoms b c)))))
 819
 820 (ert-deftest ert-test-explain-equal-keymaps ()
 821   ;; This used to be very slow.
 822   (should (equal (make-keymap) (make-keymap)))
 823   (should (equal (make-sparse-keymap) (make-sparse-keymap))))
 824
 825 (ert-deftest ert-test-significant-plist-keys ()
 826   (should (equal (ert--significant-plist-keys '()) '()))
 827   (should (equal (ert--significant-plist-keys '(a b c d e f c g p q r nil s t))
 828                  '(a c e p s))))
 829
 830 (ert-deftest ert-test-plist-difference-explanation ()
 831   (should (equal (ert--plist-difference-explanation
 832                   '(a b c nil) '(a b))
 833                  nil))
 834   (should (equal (ert--plist-difference-explanation
 835                   '(a b c t) '(a b))
 836                  '(different-properties-for-key c (different-atoms t nil))))
 837   (should (equal (ert--plist-difference-explanation
 838                   '(a b c t) '(c nil a b))
 839                  '(different-properties-for-key c (different-atoms t nil))))
 840   (should (equal (ert--plist-difference-explanation
 841                   '(a b c (foo . bar)) '(c (foo . baz) a b))
 842                  '(different-properties-for-key c
 843                                                 (cdr
 844                                                  (different-atoms bar baz))))))
 845
 846 (ert-deftest ert-test-abbreviate-string ()
 847   (should (equal (ert--abbreviate-string "foo" 4 nil) "foo"))
 848   (should (equal (ert--abbreviate-string "foo" 3 nil) "foo"))
 849   (should (equal (ert--abbreviate-string "foo" 3 nil) "foo"))
 850   (should (equal (ert--abbreviate-string "foo" 2 nil) "fo"))
 851   (should (equal (ert--abbreviate-string "foo" 1 nil) "f"))
 852   (should (equal (ert--abbreviate-string "foo" 0 nil) ""))
 853   (should (equal (ert--abbreviate-string "bar" 4 t) "bar"))
 854   (should (equal (ert--abbreviate-string "bar" 3 t) "bar"))
 855   (should (equal (ert--abbreviate-string "bar" 3 t) "bar"))
 856   (should (equal (ert--abbreviate-string "bar" 2 t) "ar"))
 857   (should (equal (ert--abbreviate-string "bar" 1 t) "r"))
 858   (should (equal (ert--abbreviate-string "bar" 0 t) "")))
 859
 860 (ert-deftest ert-test-explain-equal-string-properties ()
 861   (should
 862    (equal (ert--explain-equal-including-properties #("foo" 0 1 (a b))
 863                                                    "foo")
 864           '(char 0 "f"
 865                  (different-properties-for-key a (different-atoms b nil))
 866                  context-before ""
 867                  context-after "oo")))
 868   (should (equal (ert--explain-equal-including-properties
 869                   #("foo" 1 3 (a b))
 870                   #("goo" 0 1 (c d)))
 871                  '(array-elt 0 (different-atoms (?f "#x66" "?f")
 872                                                 (?g "#x67" "?g")))))
 873   (should
 874    (equal (ert--explain-equal-including-properties
 875            #("foo" 0 1 (a b c d) 1 3 (a b))
 876            #("foo" 0 1 (c d a b) 1 2 (a foo)))
 877           '(char 1 "o" (different-properties-for-key a (different-atoms b foo))
 878                  context-before "f" context-after "o"))))
 879
 880 (ert-deftest ert-test-equal-including-properties ()
 881   (should (equal-including-properties "foo" "foo"))
 882   (should (ert-equal-including-properties "foo" "foo"))
 883
 884   (should (equal-including-properties #("foo" 0 3 (a b))
 885                                       (propertize "foo" 'a 'b)))
 886   (should (ert-equal-including-properties #("foo" 0 3 (a b))
 887                                           (propertize "foo" 'a 'b)))
 888
 889   (should (equal-including-properties #("foo" 0 3 (a b c d))
 890                                       (propertize "foo" 'a 'b 'c 'd)))
 891   (should (ert-equal-including-properties #("foo" 0 3 (a b c d))
 892                                           (propertize "foo" 'a 'b 'c 'd)))
 893
 894   (should-not (equal-including-properties #("foo" 0 3 (a b c e))
 895                                           (propertize "foo" 'a 'b 'c 'd)))
 896   (should-not (ert-equal-including-properties #("foo" 0 3 (a b c e))
 897                                               (propertize "foo" 'a 'b 'c 'd)))
 898
 899   ;; This is bug 6581.
 900   (should-not (equal-including-properties #("foo" 0 3 (a (t)))
 901                                           (propertize "foo" 'a (list t))))
 902   (should (ert-equal-including-properties #("foo" 0 3 (a (t)))
 903                                           (propertize "foo" 'a (list t)))))
 904
 905 (ert-deftest ert-test-stats-set-test-and-result ()
 906   (let* ((test-1 (make-ert-test :name 'test-1
 907                                 :body (lambda () nil)))
 908          (test-2 (make-ert-test :name 'test-2
 909                                 :body (lambda () nil)))
 910          (test-3 (make-ert-test :name 'test-2
 911                                 :body (lambda () nil)))
 912          (stats (ert--make-stats (list test-1 test-2) 't))
 913          (failed (make-ert-test-failed :condition nil
 914                                        :backtrace nil
 915                                        :infos nil)))
 916     (should (eql 2 (ert-stats-total stats)))
 917     (should (eql 0 (ert-stats-completed stats)))
 918     (should (eql 0 (ert-stats-completed-expected stats)))
 919     (should (eql 0 (ert-stats-completed-unexpected stats)))
 920     (ert--stats-set-test-and-result stats 0 test-1 (make-ert-test-passed))
 921     (should (eql 2 (ert-stats-total stats)))
 922     (should (eql 1 (ert-stats-completed stats)))
 923     (should (eql 1 (ert-stats-completed-expected stats)))
 924     (should (eql 0 (ert-stats-completed-unexpected stats)))
 925     (ert--stats-set-test-and-result stats 0 test-1 failed)
 926     (should (eql 2 (ert-stats-total stats)))
 927     (should (eql 1 (ert-stats-completed stats)))
 928     (should (eql 0 (ert-stats-completed-expected stats)))
 929     (should (eql 1 (ert-stats-completed-unexpected stats)))
 930     (ert--stats-set-test-and-result stats 0 test-1 nil)
 931     (should (eql 2 (ert-stats-total stats)))
 932     (should (eql 0 (ert-stats-completed stats)))
 933     (should (eql 0 (ert-stats-completed-expected stats)))
 934     (should (eql 0 (ert-stats-completed-unexpected stats)))
 935     (ert--stats-set-test-and-result stats 0 test-3 failed)
 936     (should (eql 2 (ert-stats-total stats)))
 937     (should (eql 1 (ert-stats-completed stats)))
 938     (should (eql 0 (ert-stats-completed-expected stats)))
 939     (should (eql 1 (ert-stats-completed-unexpected stats)))
 940     (ert--stats-set-test-and-result stats 1 test-2 (make-ert-test-passed))
 941     (should (eql 2 (ert-stats-total stats)))
 942     (should (eql 2 (ert-stats-completed stats)))
 943     (should (eql 1 (ert-stats-completed-expected stats)))
 944     (should (eql 1 (ert-stats-completed-unexpected stats)))
 945     (ert--stats-set-test-and-result stats 0 test-1 (make-ert-test-passed))
 946     (should (eql 2 (ert-stats-total stats)))
 947     (should (eql 2 (ert-stats-completed stats)))
 948     (should (eql 2 (ert-stats-completed-expected stats)))
 949     (should (eql 0 (ert-stats-completed-unexpected stats)))))
 950
 951
 952 (provide 'ert-tests)
 953
 954 ;;; ert-tests.el ends here