code.delx.au - gnu-emacs-elpa/blob - company-tests.el

   1 ;;; company-tests.el --- company-mode tests  -*- lexical-binding: t -*-
   2
   3 ;; Copyright (C) 2011, 2013-2014  Free Software Foundation, Inc.
   4
   5 ;; Author: Nikolaj Schumacher
   6
   7 ;; This file is part of GNU Emacs.
   8
   9 ;; GNU Emacs is free software: you can redistribute it and/or modify
  10 ;; it under the terms of the GNU General Public License as published by
  11 ;; the Free Software Foundation, either version 3 of the License, or
  12 ;; (at your option) any later version.
  13
  14 ;; GNU Emacs is distributed in the hope that it will be useful,
  15 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 ;; GNU General Public License for more details.
  18
  19 ;; You should have received a copy of the GNU General Public License
  20 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  21
  22
  23 ;;; Commentary:
  24 ;;
  25
  26 ;;; Code:
  27
  28 (require 'ert)
  29 (require 'company)
  30 (require 'company-keywords)
  31 (require 'company-clang)
  32
  33 (defun company--column (&optional pos)
  34   (car (company--col-row pos)))
  35
  36 ;;; Core
  37
  38 (ert-deftest company-sorted-keywords ()
  39   "Test that keywords in `company-keywords-alist' are in alphabetical order."
  40   (dolist (pair company-keywords-alist)
  41     (when (consp (cdr pair))
  42       (let ((prev (cadr pair)))
  43         (dolist (next (cddr pair))
  44           (should (not (equal prev next)))
  45           (should (string< prev next))
  46           (setq prev next))))))
  47
  48 (ert-deftest company-good-prefix ()
  49   (let ((company-minimum-prefix-length 5)
  50         company-abort-manual-when-too-short
  51         company--manual-action            ;idle begin
  52         (company-selection-changed t))    ;has no effect
  53     (should (eq t (company--good-prefix-p "!@#$%")))
  54     (should (eq nil (company--good-prefix-p "abcd")))
  55     (should (eq nil (company--good-prefix-p 'stop)))
  56     (should (eq t (company--good-prefix-p '("foo" . 5))))
  57     (should (eq nil (company--good-prefix-p '("foo" . 4))))
  58     (should (eq t (company--good-prefix-p '("foo" . t))))))
  59
  60 (ert-deftest company--manual-prefix-set-and-unset ()
  61   (with-temp-buffer
  62     (insert "ab")
  63     (company-mode)
  64     (let (company-frontends
  65           (company-backends
  66            (list (lambda (command &optional arg)
  67                    (cl-case command
  68                      (prefix (buffer-substring (point-min) (point)))
  69                      (candidates '("abc" "abd")))))))
  70       (company-manual-begin)
  71       (should (equal "ab" company--manual-prefix))
  72       (company-abort)
  73       (should (null company--manual-prefix)))))
  74
  75 (ert-deftest company-abort-manual-when-too-short ()
  76   (let ((company-minimum-prefix-length 5)
  77         (company-abort-manual-when-too-short t)
  78         (company-selection-changed t))    ;has not effect
  79     (let ((company--manual-action nil))   ;idle begin
  80       (should (eq t (company--good-prefix-p "!@#$%")))
  81       (should (eq t (company--good-prefix-p '("foo" . 5))))
  82       (should (eq t (company--good-prefix-p '("foo" . t)))))
  83     (let ((company--manual-action t)
  84           (company--manual-prefix "abc")) ;manual begin from this prefix
  85       (should (eq t (company--good-prefix-p "!@#$")))
  86       (should (eq nil (company--good-prefix-p "ab")))
  87       (should (eq nil (company--good-prefix-p 'stop)))
  88       (should (eq t (company--good-prefix-p '("foo" . 4))))
  89       (should (eq t (company--good-prefix-p "abcd")))
  90       (should (eq t (company--good-prefix-p "abc")))
  91       (should (eq t (company--good-prefix-p '("bar" . t)))))))
  92
  93 (ert-deftest company-multi-backend-with-lambdas ()
  94   (let ((company-backend
  95          (list (lambda (command &optional arg &rest ignore)
  96                  (cl-case command
  97                    (prefix "z")
  98                    (candidates '("a" "b"))))
  99                (lambda (command &optional arg &rest ignore)
 100                  (cl-case command
 101                    (prefix "z")
 102                    (candidates '("c" "d")))))))
 103     (should (equal (company-call-backend 'candidates "z") '("a" "b" "c" "d")))))
 104
 105 (ert-deftest company-multi-backend-filters-backends-by-prefix ()
 106   (let ((company-backend
 107          (list (lambda (command &optional arg &rest ignore)
 108                  (cl-case command
 109                    (prefix (cons "z" t))
 110                    (candidates '("a" "b"))))
 111                (lambda (command &optional arg &rest ignore)
 112                  (cl-case command
 113                    (prefix "t")
 114                    (candidates '("c" "d"))))
 115                (lambda (command &optional arg &rest ignore)
 116                  (cl-case command
 117                    (prefix "z")
 118                    (candidates '("e" "f")))))))
 119     (should (equal (company-call-backend 'candidates "z") '("a" "b" "e" "f")))))
 120
 121 (ert-deftest company-multi-backend-remembers-candidate-backend ()
 122   (let ((company-backend
 123          (list (lambda (command &optional arg)
 124                  (cl-case command
 125                    (ignore-case nil)
 126                    (annotation "1")
 127                    (candidates '("a" "c"))
 128                    (post-completion "13")))
 129                (lambda (command &optional arg)
 130                  (cl-case command
 131                    (ignore-case t)
 132                    (annotation "2")
 133                    (candidates '("b" "d"))
 134                    (post-completion "42")))
 135                (lambda (command &optional arg)
 136                  (cl-case command
 137                    (annotation "3")
 138                    (candidates '("e"))
 139                    (post-completion "74"))))))
 140     (let ((candidates (company-calculate-candidates nil)))
 141       (should (equal candidates '("a" "b" "c" "d" "e")))
 142       (should (equal t (company-call-backend 'ignore-case)))
 143       (should (equal "1" (company-call-backend 'annotation (nth 0 candidates))))
 144       (should (equal "2" (company-call-backend 'annotation (nth 1 candidates))))
 145       (should (equal "13" (company-call-backend 'post-completion (nth 2 candidates))))
 146       (should (equal "42" (company-call-backend 'post-completion (nth 3 candidates))))
 147       (should (equal "3" (company-call-backend 'annotation (nth 4 candidates))))
 148       (should (equal "74" (company-call-backend 'post-completion (nth 4 candidates)))))))
 149
 150 (ert-deftest company-multi-backend-handles-keyword-with ()
 151   (let ((primo (lambda (command &optional arg)
 152                  (cl-case command
 153                    (prefix "a")
 154                    (candidates '("abb" "abc" "abd")))))
 155         (secundo (lambda (command &optional arg)
 156                    (cl-case command
 157                      (prefix "a")
 158                      (candidates '("acc" "acd"))))))
 159     (let ((company-backend (list 'ignore 'ignore :with secundo)))
 160       (should (null (company-call-backend 'prefix))))
 161     (let ((company-backend (list 'ignore primo :with secundo)))
 162       (should (equal "a" (company-call-backend 'prefix)))
 163       (should (equal '("abb" "abc" "abd" "acc" "acd")
 164                      (company-call-backend 'candidates "a"))))))
 165
 166 (ert-deftest company-begin-backend-failure-doesnt-break-company-backends ()
 167   (with-temp-buffer
 168     (insert "a")
 169     (company-mode)
 170     (should-error
 171      (company-begin-backend (lambda (command &rest ignore))))
 172     (let (company-frontends
 173           (company-backends
 174            (list (lambda (command &optional arg)
 175                    (cl-case command
 176                      (prefix "a")
 177                      (candidates '("a" "ab" "ac")))))))
 178       (let (this-command)
 179         (company-call 'complete))
 180       (should (eq 3 company-candidates-length)))))
 181
 182 (ert-deftest company-require-match-explicit ()
 183   (with-temp-buffer
 184     (insert "ab")
 185     (company-mode)
 186     (let (company-frontends
 187           (company-require-match 'company-explicit-action-p)
 188           (company-backends
 189            (list (lambda (command &optional arg)
 190                    (cl-case command
 191                      (prefix (buffer-substring (point-min) (point)))
 192                      (candidates '("abc" "abd")))))))
 193       (let (this-command)
 194         (company-complete))
 195       (let ((last-command-event ?e))
 196         (company-call 'self-insert-command 1))
 197       (should (eq 2 company-candidates-length))
 198       (should (eq 3 (point))))))
 199
 200 (ert-deftest company-dont-require-match-when-idle ()
 201   (with-temp-buffer
 202     (insert "ab")
 203     (company-mode)
 204     (let (company-frontends
 205           (company-minimum-prefix-length 2)
 206           (company-require-match 'company-explicit-action-p)
 207           (company-backends
 208            (list (lambda (command &optional arg)
 209                    (cl-case command
 210                      (prefix (buffer-substring (point-min) (point)))
 211                      (candidates '("abc" "abd")))))))
 212       (company-idle-begin (current-buffer) (selected-window)
 213                           (buffer-chars-modified-tick) (point))
 214       (should (eq 2 company-candidates-length))
 215       (let ((last-command-event ?e))
 216         (company-call 'self-insert-command 1))
 217       (should (eq nil company-candidates-length))
 218       (should (eq 4 (point))))))
 219
 220 (ert-deftest company-dont-require-match-if-old-prefix-ended-and-was-a-match ()
 221   (with-temp-buffer
 222     (insert "ab")
 223     (company-mode)
 224     (let (company-frontends
 225           (company-require-match 'company-explicit-action-p)
 226           (company-backends
 227            (list (lambda (command &optional arg)
 228                    (cl-case command
 229                      (prefix (company-grab-word))
 230                      (candidates '("abc" "ab" "abd"))
 231                      (sorted t))))))
 232       (let (this-command)
 233         (company-complete))
 234       (let ((last-command-event ?e))
 235         (company-call 'self-insert-command 1))
 236       (should (eq 3 company-candidates-length))
 237       (should (eq 3 (point)))
 238       (let ((last-command-event ? ))
 239         (company-call 'self-insert-command 1))
 240       (should (null company-candidates-length))
 241       (should (eq 4 (point))))))
 242
 243 (ert-deftest company-should-complete-whitelist ()
 244   (with-temp-buffer
 245     (insert "ab")
 246     (company-mode)
 247     (let (company-frontends
 248           company-begin-commands
 249           (company-backends
 250            (list (lambda (command &optional arg)
 251                    (cl-case command
 252                      (prefix (buffer-substring (point-min) (point)))
 253                      (candidates '("abc" "abd")))))))
 254       (let ((company-continue-commands nil))
 255         (let (this-command)
 256           (company-complete))
 257         (company-call 'backward-delete-char 1)
 258         (should (null company-candidates-length)))
 259       (let ((company-continue-commands '(backward-delete-char)))
 260         (let (this-command)
 261           (company-complete))
 262         (company-call 'backward-delete-char 1)
 263         (should (eq 2 company-candidates-length))))))
 264
 265 (ert-deftest company-should-complete-blacklist ()
 266   (with-temp-buffer
 267     (insert "ab")
 268     (company-mode)
 269     (let (company-frontends
 270           company-begin-commands
 271           (company-backends
 272            (list (lambda (command &optional arg)
 273                    (cl-case command
 274                      (prefix (buffer-substring (point-min) (point)))
 275                      (candidates '("abc" "abd")))))))
 276       (let ((company-continue-commands '(not backward-delete-char)))
 277         (let (this-command)
 278           (company-complete))
 279         (company-call 'backward-delete-char 1)
 280         (should (null company-candidates-length)))
 281       (let ((company-continue-commands '(not backward-delete-char-untabify)))
 282         (let (this-command)
 283           (company-complete))
 284         (company-call 'backward-delete-char 1)
 285         (should (eq 2 company-candidates-length))))))
 286
 287 (ert-deftest company-auto-complete-explicit ()
 288   (with-temp-buffer
 289     (insert "ab")
 290     (company-mode)
 291     (let (company-frontends
 292           (company-auto-complete 'company-explicit-action-p)
 293           (company-auto-complete-chars '(? ))
 294           (company-backends
 295            (list (lambda (command &optional arg)
 296                    (cl-case command
 297                      (prefix (buffer-substring (point-min) (point)))
 298                      (candidates '("abcd" "abef")))))))
 299       (let (this-command)
 300         (company-complete))
 301       (let ((last-command-event ? ))
 302         (company-call 'self-insert-command 1))
 303       (should (string= "abcd " (buffer-string))))))
 304
 305 (ert-deftest company-no-auto-complete-when-idle ()
 306   (with-temp-buffer
 307     (insert "ab")
 308     (company-mode)
 309     (let (company-frontends
 310           (company-auto-complete 'company-explicit-action-p)
 311           (company-auto-complete-chars '(? ))
 312           (company-minimum-prefix-length 2)
 313           (company-backends
 314            (list (lambda (command &optional arg)
 315                    (cl-case command
 316                      (prefix (buffer-substring (point-min) (point)))
 317                      (candidates '("abcd" "abef")))))))
 318       (company-idle-begin (current-buffer) (selected-window)
 319                           (buffer-chars-modified-tick) (point))
 320       (let ((last-command-event ? ))
 321         (company-call 'self-insert-command 1))
 322       (should (string= "ab " (buffer-string))))))
 323
 324 (ert-deftest company-clears-explicit-action-when-no-matches ()
 325   (with-temp-buffer
 326     (company-mode)
 327     (let (company-frontends
 328           company-backends)
 329       (company-call 'manual-begin) ;; fails
 330       (should (null company-candidates))
 331       (should (null (company-explicit-action-p))))))
 332
 333 (ert-deftest company-ignore-case-replaces-prefix ()
 334   (with-temp-buffer
 335     (company-mode)
 336     (let (company-frontends
 337           company-end-of-buffer-workaround
 338           (company-backends
 339            (list (lambda (command &optional arg)
 340                    (cl-case command
 341                      (prefix (buffer-substring (point-min) (point)))
 342                      (candidates '("abcd" "abef"))
 343                      (ignore-case t))))))
 344       (insert "A")
 345       (let (this-command)
 346         (company-complete))
 347       (should (string= "ab" (buffer-string)))
 348       (delete-char -2)
 349       (insert "A") ; hack, to keep it in one test
 350       (company-complete-selection)
 351       (should (string= "abcd" (buffer-string))))))
 352
 353 (ert-deftest company-ignore-case-with-keep-prefix ()
 354   (with-temp-buffer
 355     (insert "AB")
 356     (company-mode)
 357     (let (company-frontends
 358           (company-backends
 359            (list (lambda (command &optional arg)
 360                    (cl-case command
 361                      (prefix (buffer-substring (point-min) (point)))
 362                      (candidates '("abcd" "abef"))
 363                      (ignore-case 'keep-prefix))))))
 364       (let (this-command)
 365         (company-complete))
 366       (company-complete-selection)
 367       (should (string= "ABcd" (buffer-string))))))
 368
 369 (ert-deftest company-non-prefix-completion ()
 370   (with-temp-buffer
 371     (insert "tc")
 372     (company-mode)
 373     (let (company-frontends
 374           company-end-of-buffer-workaround
 375           (company-backends
 376            (list (lambda (command &optional arg)
 377                    (cl-case command
 378                      (prefix (buffer-substring (point-min) (point)))
 379                      (candidates '("tea-cup" "teal-color")))))))
 380       (let (this-command)
 381         (company-complete))
 382       (should (string= "tc" (buffer-string)))
 383       (company-complete-selection)
 384       (should (string= "tea-cup" (buffer-string))))))
 385
 386 (ert-deftest company-pseudo-tooltip-does-not-get-displaced ()
 387   :tags '(interactive)
 388   (with-temp-buffer
 389     (save-window-excursion
 390       (set-window-buffer nil (current-buffer))
 391       (save-excursion (insert " ff"))
 392       (company-mode)
 393       (let ((company-frontends '(company-pseudo-tooltip-frontend))
 394             (company-begin-commands '(self-insert-command))
 395             (company-backends
 396              (list (lambda (c &optional arg)
 397                      (cl-case c (prefix "") (candidates '("a" "b" "c")))))))
 398         (let (this-command)
 399           (company-call 'complete))
 400         (company-call 'open-line 1)
 401         (should (eq 2 (overlay-start company-pseudo-tooltip-overlay)))))))
 402
 403 (ert-deftest company-pseudo-tooltip-show ()
 404   :tags '(interactive)
 405   (with-temp-buffer
 406     (save-window-excursion
 407     (set-window-buffer nil (current-buffer))
 408     (insert "aaaa\n  bb\nccccccc\nddd")
 409     (search-backward "bb")
 410     (let ((col (company--column))
 411           (company-candidates-length 2)
 412           (company-candidates '("123" "45"))
 413           (company-backend 'ignore))
 414       (company-pseudo-tooltip-show (company--row) col 0)
 415       (let ((ov company-pseudo-tooltip-overlay))
 416         ;; With margins.
 417         (should (eq (overlay-get ov 'company-width) 5))
 418         ;; FIXME: Make it 2?
 419         (should (eq (overlay-get ov 'company-height) company-tooltip-limit))
 420         (should (eq (overlay-get ov 'company-column) col))
 421         (should (string= (overlay-get ov 'company-display)
 422                          "  123 \nc 45  c\nddd\n")))))))
 423
 424 (ert-deftest company-pseudo-tooltip-edit-updates-width ()
 425   :tags '(interactive)
 426   (with-temp-buffer
 427     (set-window-buffer nil (current-buffer))
 428     (let ((company-candidates-length 5)
 429           (company-candidates '("123" "45" "67" "89" "1011"))
 430           (company-backend 'ignore)
 431           (company-tooltip-limit 4)
 432           (company-tooltip-offset-display 'scrollbar))
 433       (company-pseudo-tooltip-show (company--row)
 434                                    (company--column)
 435                                    0)
 436       (should (eq (overlay-get company-pseudo-tooltip-overlay 'company-width)
 437                   6))
 438       (company-pseudo-tooltip-edit 4)
 439       (should (eq (overlay-get company-pseudo-tooltip-overlay 'company-width)
 440                   7)))))
 441
 442 (ert-deftest company-preview-show-with-annotations ()
 443   :tags '(interactive)
 444   (with-temp-buffer
 445     (save-window-excursion
 446       (set-window-buffer nil (current-buffer))
 447       (save-excursion (insert "\n"))
 448       (let ((company-candidates-length 1)
 449             (company-candidates '("123")))
 450         (company-preview-show-at-point (point))
 451         (let ((ov company-preview-overlay))
 452           (should (string= (overlay-get ov 'display) "123\n")))))))
 453
 454 (ert-deftest company-pseudo-tooltip-show-with-annotations ()
 455   :tags '(interactive)
 456   (with-temp-buffer
 457     (save-window-excursion
 458       (set-window-buffer nil (current-buffer))
 459       (insert " ")
 460       (save-excursion (insert "\n"))
 461       (let ((company-candidates-length 2)
 462             (company-backend (lambda (action &optional arg &rest _ignore)
 463                                (when (eq action 'annotation)
 464                                  (cdr (assoc arg '(("123" . "(4)")))))))
 465             (company-candidates '("123" "45"))
 466             company-tooltip-align-annotations)
 467         (company-pseudo-tooltip-show-at-point (point) 0)
 468         (let ((ov company-pseudo-tooltip-overlay))
 469           ;; With margins.
 470           (should (eq (overlay-get ov 'company-width) 8))
 471           (should (string= (overlay-get ov 'company-display)
 472                            " 123(4) \n 45     \n")))))))
 473
 474 (ert-deftest company-pseudo-tooltip-show-with-annotations-right-aligned ()
 475   :tags '(interactive)
 476   (with-temp-buffer
 477     (save-window-excursion
 478       (set-window-buffer nil (current-buffer))
 479       (insert " ")
 480       (save-excursion (insert "\n"))
 481       (let ((company-candidates-length 3)
 482             (company-backend (lambda (action &optional arg &rest _ignore)
 483                                (when (eq action 'annotation)
 484                                  (cdr (assoc arg '(("123" . "(4)")
 485                                                    ("67" . "(891011)")))))))
 486             (company-candidates '("123" "45" "67"))
 487             (company-tooltip-align-annotations t))
 488         (company-pseudo-tooltip-show-at-point (point) 0)
 489         (let ((ov company-pseudo-tooltip-overlay))
 490           ;; With margins.
 491           (should (eq (overlay-get ov 'company-width) 13))
 492           (should (string= (overlay-get ov 'company-display)
 493                            " 123     (4) \n 45          \n 67 (891011) \n")))))))
 494
 495 (ert-deftest company-create-lines-shows-numbers ()
 496   (let ((company-show-numbers t)
 497         (company-candidates '("x" "y" "z"))
 498         (company-candidates-length 3)
 499         (company-backend 'ignore))
 500     (should (equal '(" x 1 " " y 2 " " z 3 ")
 501                    (company--create-lines 0 999)))))
 502
 503 (ert-deftest company-create-lines-truncates-annotations ()
 504   (let* ((ww (company--window-width))
 505          (data `(("1" . "(123)")
 506                  ("2" . nil)
 507                  ("3" . ,(concat "(" (make-string (- ww 2) ?4) ")"))
 508                  (,(make-string ww ?4) . "<4>")))
 509          (company-candidates (mapcar #'car data))
 510          (company-candidates-length 4)
 511          (company-tooltip-margin 1)
 512          (company-backend (lambda (cmd &optional arg)
 513                             (when (eq cmd 'annotation)
 514                               (cdr (assoc arg data)))))
 515          company-tooltip-align-annotations)
 516     (should (equal (list (format " 1(123)%s " (company-space-string (- ww 8)))
 517                          (format " 2%s " (company-space-string (- ww 3)))
 518                          (format " 3(444%s " (make-string (- ww 7) ?4))
 519                          (format " %s " (make-string (- ww 2) ?4)))
 520                    (company--create-lines 0 999)))
 521     (let ((company-tooltip-align-annotations t))
 522       (should (equal (list (format " 1%s(123) " (company-space-string (- ww 8)))
 523                            (format " 2%s " (company-space-string (- ww 3)))
 524                            (format " 3 (444%s " (make-string (- ww 8) ?4))
 525                            (format " %s " (make-string (- ww 2) ?4)))
 526                      (company--create-lines 0 999))))))
 527
 528 (ert-deftest company-create-lines-truncates-common-part ()
 529   (let* ((ww (company--window-width))
 530          (company-candidates-length 2)
 531          (company-tooltip-margin 1)
 532          (company-backend #'ignore))
 533     (let* ((company-common (make-string (- ww 3) ?1))
 534            (company-candidates `(,(concat company-common "2")
 535                                  ,(concat company-common "3"))))
 536       (should (equal (list (format " %s2 " (make-string (- ww 3) ?1))
 537                            (format " %s3 " (make-string (- ww 3) ?1)))
 538                      (company--create-lines 0 999))))
 539     (let* ((company-common (make-string (- ww 2) ?1))
 540            (company-candidates `(,(concat company-common "2")
 541                                  ,(concat company-common "3"))))
 542       (should (equal (list (format " %s " company-common)
 543                            (format " %s " company-common))
 544                      (company--create-lines 0 999))))
 545     (let* ((company-common (make-string ww ?1))
 546            (company-candidates `(,(concat company-common "2")
 547                                  ,(concat company-common "3")))
 548            (res (company--create-lines 0 999)))
 549       (should (equal (list (format " %s " (make-string (- ww 2) ?1))
 550                            (format " %s " (make-string (- ww 2) ?1)))
 551                      res))
 552       (should (eq 'company-tooltip-common-selection
 553                     (get-text-property (- ww 2) 'face
 554                                        (car res))))
 555       (should (eq 'company-tooltip-selection
 556                   (get-text-property (1- ww) 'face
 557                                      (car res))))
 558
 559 )))
 560
 561 (ert-deftest company-column-with-composition ()
 562   :tags '(interactive)
 563   (with-temp-buffer
 564     (save-window-excursion
 565       (set-window-buffer nil (current-buffer))
 566       (insert "lambda ()")
 567       (compose-region 1 (1+ (length "lambda")) "\\")
 568       (should (= (company--column) 4)))))
 569
 570 (ert-deftest company-column-with-line-prefix ()
 571   :tags '(interactive)
 572   (with-temp-buffer
 573     (save-window-excursion
 574       (set-window-buffer nil (current-buffer))
 575       (insert "foo")
 576       (put-text-property (point-min) (point) 'line-prefix "  ")
 577       (should (= (company--column) 5)))))
 578
 579 (ert-deftest company-column-with-line-prefix-on-empty-line ()
 580   :tags '(interactive)
 581   (with-temp-buffer
 582     (save-window-excursion
 583       (set-window-buffer nil (current-buffer))
 584       (insert "\n")
 585       (forward-char -1)
 586       (put-text-property (point-min) (point-max) 'line-prefix "  ")
 587       (should (= (company--column) 2)))))
 588
 589 (ert-deftest company-plainify ()
 590   (let ((tab-width 8))
 591     (should (equal-including-properties
 592              (company-plainify "\tabc\td\t")
 593              (concat "        "
 594                      "abc     "
 595                      "d       "))))
 596   (should (equal-including-properties
 597            (company-plainify (propertize "foobar" 'line-prefix "-*-"))
 598            "-*-foobar")))
 599
 600 (ert-deftest company-buffer-lines-with-lines-folded ()
 601   (with-temp-buffer
 602     (insert (propertize "aaa\nbbb\nccc\nddd\n" 'display "aaa+\n"))
 603     (insert "eee\nfff\nggg")
 604     (should (equal (company-buffer-lines (point-min) (point-max))
 605                    '("aaa" "eee" "fff" "ggg")))))
 606
 607 (ert-deftest company-buffer-lines-with-multiline-display ()
 608   (with-temp-buffer
 609     (insert (propertize "a" 'display "bbb\nccc\ndddd\n"))
 610     (insert "eee\nfff\nggg")
 611     (should (equal (company-buffer-lines (point-min) (point-max))
 612                    '("" "" "" "eee" "fff" "ggg")))))
 613
 614 (ert-deftest company-modify-line ()
 615   (let ((str "-*-foobar"))
 616     (should (equal-including-properties
 617              (company-modify-line str "zz" 4)
 618              "-*-fzzbar"))
 619     (should (equal-including-properties
 620              (company-modify-line str "xx" 0)
 621              "xx-foobar"))
 622     (should (equal-including-properties
 623              (company-modify-line str "zz" 10)
 624              "-*-foobar zz"))))
 625
 626 (ert-deftest company-scrollbar-bounds ()
 627   (should (equal nil (company--scrollbar-bounds 0 3 3)))
 628   (should (equal nil (company--scrollbar-bounds 0 4 3)))
 629   (should (equal '(0 . 0) (company--scrollbar-bounds 0 1 2)))
 630   (should (equal '(1 . 1) (company--scrollbar-bounds 2 2 4)))
 631   (should (equal '(2 . 3) (company--scrollbar-bounds 7 4 12)))
 632   (should (equal '(1 . 2) (company--scrollbar-bounds 3 4 12)))
 633   (should (equal '(1 . 3) (company--scrollbar-bounds 4 5 11))))
 634
 635 ;;; Async
 636
 637 (defun company-async-backend (command &optional arg)
 638   (pcase command
 639     (`prefix "foo")
 640     (`candidates
 641      (cons :async
 642            (lambda (cb)
 643              (run-with-timer 0.05 nil
 644                              #'funcall cb '("abc" "abd")))))))
 645
 646 (ert-deftest company-call-backend-forces-sync ()
 647   (let ((company-backend 'company-async-backend)
 648         (company-async-timeout 0.1))
 649     (should (equal '("abc" "abd") (company-call-backend 'candidates)))))
 650
 651 (ert-deftest company-call-backend-errors-on-timeout ()
 652   (with-temp-buffer
 653     (let* ((company-backend (lambda (command &optional _arg)
 654                               (pcase command
 655                                 (`candidates (cons :async 'ignore)))))
 656            (company-async-timeout 0.1)
 657            (err (should-error (company-call-backend 'candidates "foo"))))
 658       (should (string-match-p "async timeout" (cadr err))))))
 659
 660 (ert-deftest company-call-backend-raw-passes-return-value-verbatim ()
 661   (let ((company-backend 'company-async-backend))
 662     (should (equal "foo" (company-call-backend-raw 'prefix)))
 663     (should (equal :async (car (company-call-backend-raw 'candidates "foo"))))
 664     (should (equal 'closure (cadr (company-call-backend-raw 'candidates "foo"))))))
 665
 666 (ert-deftest company-manual-begin-forces-async-candidates-to-sync ()
 667   (with-temp-buffer
 668     (company-mode)
 669     (let (company-frontends
 670           company-transformers
 671           (company-backends (list 'company-async-backend)))
 672       (company-manual-begin)
 673       (should (equal "foo" company-prefix))
 674       (should (equal '("abc" "abd") company-candidates)))))
 675
 676 (ert-deftest company-idle-begin-allows-async-candidates ()
 677   (with-temp-buffer
 678     (company-mode)
 679     (let (company-frontends
 680           company-transformers
 681           (company-backends (list 'company-async-backend)))
 682       (company-idle-begin (current-buffer) (selected-window)
 683                           (buffer-chars-modified-tick) (point))
 684       (should (null company-candidates))
 685       (sleep-for 0.1)
 686       (should (equal "foo" company-prefix))
 687       (should (equal '("abc" "abd") company-candidates)))))
 688
 689 (ert-deftest company-idle-begin-cancels-async-candidates-if-buffer-changed ()
 690   (with-temp-buffer
 691     (company-mode)
 692     (let (company-frontends
 693           (company-backends (list 'company-async-backend)))
 694       (company-idle-begin (current-buffer) (selected-window)
 695                           (buffer-chars-modified-tick) (point))
 696       (should (null company-candidates))
 697       (insert "a")
 698       (sleep-for 0.1)
 699       (should (null company-candidates)))))
 700
 701 (ert-deftest company-idle-begin-async-allows-immediate-callbacks ()
 702   (with-temp-buffer
 703     (company-mode)
 704     (let (company-frontends
 705           (company-backends
 706            (list (lambda (command &optional arg)
 707                    (pcase command
 708                      (`prefix (buffer-substring (point-min) (point)))
 709                      (`candidates
 710                       (let ((c (all-completions arg '("abc" "def"))))
 711                         (cons :async
 712                               (lambda (cb) (funcall cb c)))))
 713                      (`no-cache t)))))
 714           (company-minimum-prefix-length 0))
 715       (company-idle-begin (current-buffer) (selected-window)
 716                           (buffer-chars-modified-tick) (point))
 717       (should (equal '("abc" "def") company-candidates))
 718       (let ((last-command-event ?a))
 719         (company-call 'self-insert-command 1))
 720       (should (equal '("abc") company-candidates)))))
 721
 722 (ert-deftest company-multi-backend-forces-prefix-to-sync ()
 723   (with-temp-buffer
 724     (let ((company-backend (list 'ignore
 725                                  (lambda (command)
 726                                    (should (eq command 'prefix))
 727                                    (cons :async
 728                                          (lambda (cb)
 729                                            (run-with-timer
 730                                             0.01 nil
 731                                             (lambda () (funcall cb nil))))))
 732                                  (lambda (command)
 733                                    (should (eq command 'prefix))
 734                                    "foo"))))
 735       (should (equal "foo" (company-call-backend-raw 'prefix))))
 736     (let ((company-backend (list (lambda (_command)
 737                                    (cons :async
 738                                          (lambda (cb)
 739                                            (run-with-timer
 740                                             0.01 nil
 741                                             (lambda () (funcall cb "bar"))))))
 742                                  (lambda (_command)
 743                                    "foo"))))
 744       (should (equal "bar" (company-call-backend-raw 'prefix))))))
 745
 746 (ert-deftest company-multi-backend-merges-deferred-candidates ()
 747   (with-temp-buffer
 748     (let* ((immediate (lambda (command &optional arg)
 749                         (pcase command
 750                           (`prefix "foo")
 751                           (`candidates
 752                            (cons :async
 753                                  (lambda (cb) (funcall cb '("f"))))))))
 754            (company-backend (list 'ignore
 755                                   (lambda (command &optional arg)
 756                                     (pcase command
 757                                       (`prefix "foo")
 758                                       (`candidates
 759                                        (should (equal arg "foo"))
 760                                        (cons :async
 761                                              (lambda (cb)
 762                                                (run-with-timer
 763                                                 0.01 nil
 764                                                 (lambda () (funcall cb '("a" "b")))))))))
 765                                   (lambda (command &optional arg)
 766                                     (pcase command
 767                                       (`prefix "foo")
 768                                       (`candidates '("c" "d" "e"))))
 769                                   immediate)))
 770       (should (equal :async (car (company-call-backend-raw 'candidates "foo"))))
 771       (should (equal '("a" "b" "c" "d" "e" "f")
 772                      (company-call-backend 'candidates "foo")))
 773       (let ((company-backend (list immediate)))
 774         (should (equal '("f") (company-call-backend 'candidates "foo")))))))
 775
 776 ;;; Transformers
 777
 778 (ert-deftest company-occurrence-prefer-closest-above ()
 779   (with-temp-buffer
 780     (save-window-excursion
 781       (set-window-buffer nil (current-buffer))
 782       (insert "foo0
 783 foo1
 784 ")
 785       (save-excursion
 786         (insert "
 787 foo3
 788 foo2"))
 789       (let ((company-backend 'company-dabbrev)
 790             (company-occurrence-weight-function
 791              'company-occurrence-prefer-closest-above))
 792         (should (equal '("foo1" "foo0" "foo3" "foo2" "foo4")
 793                        (company-sort-by-occurrence
 794                         '("foo0" "foo1" "foo2" "foo3" "foo4"))))))))
 795
 796 (ert-deftest company-occurrence-prefer-any-closest ()
 797   (with-temp-buffer
 798     (save-window-excursion
 799       (set-window-buffer nil (current-buffer))
 800       (insert "foo0
 801 foo1
 802 ")
 803       (save-excursion
 804         (insert "
 805 foo3
 806 foo2"))
 807       (let ((company-backend 'company-dabbrev)
 808             (company-occurrence-weight-function
 809              'company-occurrence-prefer-any-closest))
 810         (should (equal '("foo1" "foo3" "foo0" "foo2" "foo4")
 811                        (company-sort-by-occurrence
 812                         '("foo0" "foo1" "foo2" "foo3" "foo4"))))))))
 813
 814 ;;; Template
 815
 816 (ert-deftest company-template-removed-after-the-last-jump ()
 817   (with-temp-buffer
 818     (insert "{ }")
 819     (goto-char 2)
 820     (let ((tpl (company-template-declare-template (point) (1- (point-max)))))
 821       (save-excursion
 822         (dotimes (i 2)
 823           (insert " ")
 824           (company-template-add-field tpl (point) "foo")))
 825       (company-call 'template-forward-field)
 826       (should (= 3 (point)))
 827       (company-call 'template-forward-field)
 828       (should (= 7 (point)))
 829       (company-call 'template-forward-field)
 830       (should (= 11 (point)))
 831       (should (zerop (length (overlay-get tpl 'company-template-fields))))
 832       (should (null (overlay-buffer tpl))))))
 833
 834 (ert-deftest company-template-removed-after-input-and-jump ()
 835   (with-temp-buffer
 836     (insert "{ }")
 837     (goto-char 2)
 838     (let ((tpl (company-template-declare-template (point) (1- (point-max)))))
 839       (save-excursion
 840         (insert " ")
 841         (company-template-add-field tpl (point) "bar"))
 842       (company-call 'template-move-to-first tpl)
 843       (should (= 3 (point)))
 844       (dolist (c (string-to-list "tee"))
 845         (let ((last-command-event c))
 846           (company-call 'self-insert-command 1)))
 847       (should (string= "{ tee }" (buffer-string)))
 848       (should (overlay-buffer tpl))
 849       (company-call 'template-forward-field)
 850       (should (= 7 (point)))
 851       (should (null (overlay-buffer tpl))))))
 852
 853 (defun company-call (name &rest args)
 854   (let* ((maybe (intern (format "company-%s" name)))
 855          (command (if (fboundp maybe) maybe name)))
 856     (let ((this-command command))
 857       (run-hooks 'pre-command-hook))
 858     (apply command args)
 859     (let ((this-command command))
 860       (run-hooks 'post-command-hook))))
 861
 862 (ert-deftest company-template-c-like-templatify ()
 863   (with-temp-buffer
 864     (let ((text "foo(int a, short b)"))
 865       (insert text)
 866       (company-template-c-like-templatify text)
 867       (should (equal "foo(arg0, arg1)" (buffer-string)))
 868       (should (looking-at "arg0"))
 869       (should (equal "int a"
 870                      (overlay-get (company-template-field-at) 'display))))))
 871
 872 (ert-deftest company-template-c-like-templatify-trims-after-closing-paren ()
 873   (with-temp-buffer
 874     (let ((text "foo(int a, short b)!@ #1334 a"))
 875       (insert text)
 876       (company-template-c-like-templatify text)
 877       (should (equal "foo(arg0, arg1)" (buffer-string)))
 878       (should (looking-at "arg0")))))
 879
 880 ;;; Clang
 881
 882 (ert-deftest company-clang-objc-templatify ()
 883   (with-temp-buffer
 884     (let ((text "createBookWithTitle:andAuthor:"))
 885       (insert text)
 886       (company-clang-objc-templatify text)
 887       (should (equal "createBookWithTitle:arg0 andAuthor:arg1" (buffer-string)))
 888       (should (looking-at "arg0"))
 889       (should (null (overlay-get (company-template-field-at) 'display))))))