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 (eval-when-compile (require 'cl))
  29 (require 'ert)
  30 (require 'company)
  31 (require 'company-keywords)
  32 (require 'company-clang)
  33
  34 ;;; Core
  35
  36 (ert-deftest company-sorted-keywords ()
  37   "Test that keywords in `company-keywords-alist' are in alphabetical order."
  38   (dolist (pair company-keywords-alist)
  39     (when (consp (cdr pair))
  40       (let ((prev (cadr pair)))
  41         (dolist (next (cddr pair))
  42           (should (not (equal prev next)))
  43           (should (string< prev next))
  44           (setq prev next))))))
  45
  46 (ert-deftest company-good-prefix ()
  47   (let ((company-minimum-prefix-length 5)
  48         company-abort-manual-when-too-short
  49         company--manual-action            ;idle begin
  50         (company-selection-changed t))    ;has no effect
  51     (should (eq t (company--good-prefix-p "!@#$%")))
  52     (should (eq nil (company--good-prefix-p "abcd")))
  53     (should (eq nil (company--good-prefix-p 'stop)))
  54     (should (eq t (company--good-prefix-p '("foo" . 5))))
  55     (should (eq nil (company--good-prefix-p '("foo" . 4))))
  56     (should (eq t (company--good-prefix-p '("foo" . t))))))
  57
  58 (ert-deftest company--manual-prefix-set-and-unset ()
  59   (with-temp-buffer
  60     (insert "ab")
  61     (company-mode)
  62     (let (company-frontends
  63           (company-backends
  64            (list (lambda (command &optional arg)
  65                    (case command
  66                      (prefix (buffer-substring (point-min) (point)))
  67                      (candidates '("abc" "abd")))))))
  68       (company-manual-begin)
  69       (should (equal "ab" company--manual-prefix))
  70       (company-abort)
  71       (should (null company--manual-prefix)))))
  72
  73 (ert-deftest company-abort-manual-when-too-short ()
  74   (let ((company-minimum-prefix-length 5)
  75         (company-abort-manual-when-too-short t)
  76         (company-selection-changed t))    ;has not effect
  77     (let ((company--manual-action nil))   ;idle begin
  78       (should (eq t (company--good-prefix-p "!@#$%")))
  79       (should (eq t (company--good-prefix-p '("foo" . 5))))
  80       (should (eq t (company--good-prefix-p '("foo" . t)))))
  81     (let ((company--manual-action t)
  82           (company--manual-prefix "abc")) ;manual begin from this prefix
  83       (should (eq t (company--good-prefix-p "!@#$")))
  84       (should (eq nil (company--good-prefix-p "ab")))
  85       (should (eq nil (company--good-prefix-p 'stop)))
  86       (should (eq t (company--good-prefix-p '("foo" . 4))))
  87       (should (eq t (company--good-prefix-p "abcd")))
  88       (should (eq t (company--good-prefix-p "abc")))
  89       (should (eq t (company--good-prefix-p '("bar" . t)))))))
  90
  91 (ert-deftest company-multi-backend-with-lambdas ()
  92   (let ((company-backend
  93          (list (lambda (command &optional arg &rest ignore)
  94                  (case command
  95                    (prefix "z")
  96                    (candidates '("a" "b"))))
  97                (lambda (command &optional arg &rest ignore)
  98                  (case command
  99                    (prefix "z")
 100                    (candidates '("c" "d")))))))
 101     (should (equal (company-call-backend 'candidates "z") '("a" "b" "c" "d")))))
 102
 103 (ert-deftest company-multi-backend-remembers-candidate-backend ()
 104   (let ((company-backend
 105          (list (lambda (command &optional arg)
 106                  (case command
 107                    (ignore-case nil)
 108                    (annotation "1")
 109                    (candidates '("a" "c"))
 110                    (post-completion "13")))
 111                (lambda (command &optional arg)
 112                  (case command
 113                    (ignore-case t)
 114                    (annotation "2")
 115                    (candidates '("b" "d"))
 116                    (post-completion "42")))
 117                (lambda (command &optional arg)
 118                  (case command
 119                    (annotation "3")
 120                    (candidates '("e"))
 121                    (post-completion "74"))))))
 122     (let ((candidates (company-calculate-candidates nil)))
 123       (should (equal candidates '("a" "b" "c" "d" "e")))
 124       (should (equal t (company-call-backend 'ignore-case)))
 125       (should (equal "1" (company-call-backend 'annotation (nth 0 candidates))))
 126       (should (equal "2" (company-call-backend 'annotation (nth 1 candidates))))
 127       (should (equal "13" (company-call-backend 'post-completion (nth 2 candidates))))
 128       (should (equal "42" (company-call-backend 'post-completion (nth 3 candidates))))
 129       (should (equal "3" (company-call-backend 'annotation (nth 4 candidates))))
 130       (should (equal "74" (company-call-backend 'post-completion (nth 4 candidates)))))))
 131
 132 (ert-deftest company-multi-backend-handles-keyword-with ()
 133   (let ((primo (lambda (command &optional arg)
 134                  (case command
 135                    (prefix "a")
 136                    (candidates '("abb" "abc" "abd")))))
 137         (secundo (lambda (command &optional arg)
 138                    (case command
 139                      (prefix "a")
 140                      (candidates '("acc" "acd"))))))
 141     (let ((company-backend (list 'ignore 'ignore :with secundo)))
 142       (should (null (company-call-backend 'prefix))))
 143     (let ((company-backend (list 'ignore primo :with secundo)))
 144       (should (equal "a" (company-call-backend 'prefix)))
 145       (should (equal '("abb" "abc" "abd" "acc" "acd")
 146                      (company-call-backend 'candidates "a"))))))
 147
 148 (ert-deftest company-begin-backend-failure-doesnt-break-company-backends ()
 149   (with-temp-buffer
 150     (insert "a")
 151     (company-mode)
 152     (should-error
 153      (company-begin-backend (lambda (command &rest ignore))))
 154     (let (company-frontends
 155           (company-backends
 156            (list (lambda (command &optional arg)
 157                    (case command
 158                      (prefix "a")
 159                      (candidates '("a" "ab" "ac")))))))
 160       (let (this-command)
 161         (company-call 'complete))
 162       (should (eq 3 company-candidates-length)))))
 163
 164 (ert-deftest company-require-match-explicit ()
 165   (with-temp-buffer
 166     (insert "ab")
 167     (company-mode)
 168     (let (company-frontends
 169           (company-require-match 'company-explicit-action-p)
 170           (company-backends
 171            (list (lambda (command &optional arg)
 172                    (case command
 173                      (prefix (buffer-substring (point-min) (point)))
 174                      (candidates '("abc" "abd")))))))
 175       (let (this-command)
 176         (company-complete))
 177       (let ((last-command-event ?e))
 178         (company-call 'self-insert-command 1))
 179       (should (eq 2 company-candidates-length))
 180       (should (eq 3 (point))))))
 181
 182 (ert-deftest company-dont-require-match-when-idle ()
 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                    (case command
 191                      (prefix (buffer-substring (point-min) (point)))
 192                      (candidates '("abc" "abd")))))))
 193       (company-idle-begin (current-buffer) (selected-window)
 194                           (buffer-chars-modified-tick) (point))
 195       (let ((last-command-event ?e))
 196         (company-call 'self-insert-command 1))
 197       (should (eq nil company-candidates-length))
 198       (should (eq 4 (point))))))
 199
 200 (ert-deftest company-should-complete-whitelist ()
 201   (with-temp-buffer
 202     (insert "ab")
 203     (company-mode)
 204     (let (company-frontends
 205           company-begin-commands
 206           (company-backends
 207            (list (lambda (command &optional arg)
 208                    (case command
 209                      (prefix (buffer-substring (point-min) (point)))
 210                      (candidates '("abc" "abd")))))))
 211       (let ((company-continue-commands nil))
 212         (let (this-command)
 213           (company-complete))
 214         (company-call 'backward-delete-char 1)
 215         (should (null company-candidates-length)))
 216       (let ((company-continue-commands '(backward-delete-char)))
 217         (let (this-command)
 218           (company-complete))
 219         (company-call 'backward-delete-char 1)
 220         (should (eq 2 company-candidates-length))))))
 221
 222 (ert-deftest company-should-complete-blacklist ()
 223   (with-temp-buffer
 224     (insert "ab")
 225     (company-mode)
 226     (let (company-frontends
 227           company-begin-commands
 228           (company-backends
 229            (list (lambda (command &optional arg)
 230                    (case command
 231                      (prefix (buffer-substring (point-min) (point)))
 232                      (candidates '("abc" "abd")))))))
 233       (let ((company-continue-commands '(not backward-delete-char)))
 234         (let (this-command)
 235           (company-complete))
 236         (company-call 'backward-delete-char 1)
 237         (should (null company-candidates-length)))
 238       (let ((company-continue-commands '(not backward-delete-char-untabify)))
 239         (let (this-command)
 240           (company-complete))
 241         (company-call 'backward-delete-char 1)
 242         (should (eq 2 company-candidates-length))))))
 243
 244 (ert-deftest company-auto-complete-explicit ()
 245   (with-temp-buffer
 246     (insert "ab")
 247     (company-mode)
 248     (let (company-frontends
 249           (company-auto-complete 'company-explicit-action-p)
 250           (company-auto-complete-chars '(? ))
 251           (company-backends
 252            (list (lambda (command &optional arg)
 253                    (case command
 254                      (prefix (buffer-substring (point-min) (point)))
 255                      (candidates '("abcd" "abef")))))))
 256       (let (this-command)
 257         (company-complete))
 258       (let ((last-command-event ? ))
 259         (company-call 'self-insert-command 1))
 260       (should (string= "abcd " (buffer-string))))))
 261
 262 (ert-deftest company-no-auto-complete-when-idle ()
 263   (with-temp-buffer
 264     (insert "ab")
 265     (company-mode)
 266     (let (company-frontends
 267           (company-auto-complete 'company-explicit-action-p)
 268           (company-auto-complete-chars '(? ))
 269           (company-backends
 270            (list (lambda (command &optional arg)
 271                    (case command
 272                      (prefix (buffer-substring (point-min) (point)))
 273                      (candidates '("abcd" "abef")))))))
 274       (company-idle-begin (current-buffer) (selected-window)
 275                           (buffer-chars-modified-tick) (point))
 276       (let ((last-command-event ? ))
 277         (company-call 'self-insert-command 1))
 278       (should (string= "ab " (buffer-string))))))
 279
 280 (ert-deftest company-clears-explicit-action-when-no-matches ()
 281   (with-temp-buffer
 282     (company-mode)
 283     (let (company-frontends
 284           company-backends)
 285       (company-call 'manual-begin) ;; fails
 286       (should (null company-candidates))
 287       (should (null (company-explicit-action-p))))))
 288
 289 (ert-deftest company-ignore-case-replaces-prefix ()
 290   (with-temp-buffer
 291     (company-mode)
 292     (let (company-frontends
 293           company-end-of-buffer-workaround
 294           (company-backends
 295            (list (lambda (command &optional arg)
 296                    (case command
 297                      (prefix (buffer-substring (point-min) (point)))
 298                      (candidates '("abcd" "abef"))
 299                      (ignore-case t))))))
 300       (insert "A")
 301       (let (this-command)
 302         (company-complete))
 303       (should (string= "ab" (buffer-string)))
 304       (delete-char -2)
 305       (insert "A") ; hack, to keep it in one test
 306       (company-complete-selection)
 307       (should (string= "abcd" (buffer-string))))))
 308
 309 (ert-deftest company-ignore-case-with-keep-prefix ()
 310   (with-temp-buffer
 311     (insert "AB")
 312     (company-mode)
 313     (let (company-frontends
 314           (company-backends
 315            (list (lambda (command &optional arg)
 316                    (case command
 317                      (prefix (buffer-substring (point-min) (point)))
 318                      (candidates '("abcd" "abef"))
 319                      (ignore-case 'keep-prefix))))))
 320       (let (this-command)
 321         (company-complete))
 322       (company-complete-selection)
 323       (should (string= "ABcd" (buffer-string))))))
 324
 325 (ert-deftest company-non-prefix-completion ()
 326   (with-temp-buffer
 327     (insert "tc")
 328     (company-mode)
 329     (let (company-frontends
 330           company-end-of-buffer-workaround
 331           (company-backends
 332            (list (lambda (command &optional arg)
 333                    (case command
 334                      (prefix (buffer-substring (point-min) (point)))
 335                      (candidates '("tea-cup" "teal-color")))))))
 336       (let (this-command)
 337         (company-complete))
 338       (should (string= "tc" (buffer-string)))
 339       (company-complete-selection)
 340       (should (string= "tea-cup" (buffer-string))))))
 341
 342 (ert-deftest company-pseudo-tooltip-does-not-get-displaced ()
 343   :tags '(interactive)
 344   (with-temp-buffer
 345     (save-window-excursion
 346       (set-window-buffer nil (current-buffer))
 347       (save-excursion (insert " ff"))
 348       (company-mode)
 349       (let ((company-frontends '(company-pseudo-tooltip-frontend))
 350             (company-begin-commands '(self-insert-command))
 351             (company-backends
 352              (list (lambda (c &optional arg)
 353                      (case c (prefix "") (candidates '("a" "b" "c")))))))
 354         (let (this-command)
 355           (company-call 'complete))
 356         (company-call 'open-line 1)
 357         (should (eq 2 (overlay-start company-pseudo-tooltip-overlay)))))))
 358
 359 (ert-deftest company-pseudo-tooltip-show ()
 360   :tags '(interactive)
 361   (with-temp-buffer
 362     (save-window-excursion
 363     (set-window-buffer nil (current-buffer))
 364     (insert "aaaa\n  bb\nccccccc\nddd")
 365     (search-backward "bb")
 366     (let ((col (company--column))
 367           (company-candidates-length 2)
 368           (company-candidates '("123" "45"))
 369           (company-backend 'ignore))
 370       (company-pseudo-tooltip-show (company--row) col 0)
 371       (let ((ov company-pseudo-tooltip-overlay))
 372         ;; With margins.
 373         (should (eq (overlay-get ov 'company-width) 5))
 374         ;; FIXME: Make it 2?
 375         (should (eq (overlay-get ov 'company-height) company-tooltip-limit))
 376         (should (eq (overlay-get ov 'company-column) col))
 377         (should (string= (overlay-get ov 'company-after)
 378                          "  123 \nc 45  c\nddd\n")))))))
 379
 380 (ert-deftest company-preview-show-with-annotations ()
 381   :tags '(interactive)
 382   (with-temp-buffer
 383     (save-window-excursion
 384       (set-window-buffer nil (current-buffer))
 385       (save-excursion (insert "\n"))
 386       (let ((company-candidates-length 1)
 387             (company-candidates '("123")))
 388         (company-preview-show-at-point (point))
 389         (let ((ov company-preview-overlay))
 390           (should (string= (overlay-get ov 'display) "123\n")))))))
 391
 392 (ert-deftest company-pseudo-tooltip-show-with-annotations ()
 393   :tags '(interactive)
 394   (with-temp-buffer
 395     (save-window-excursion
 396       (set-window-buffer nil (current-buffer))
 397       (insert " ")
 398       (save-excursion (insert "\n"))
 399       (let ((company-candidates-length 2)
 400             (company-backend (lambda (action &optional arg &rest _ignore)
 401                                (when (eq action 'annotation)
 402                                  (cdr (assoc arg '(("123" . "(4)")))))))
 403             (company-candidates '("123" "45"))
 404             company-tooltip-align-annotations)
 405         (company-pseudo-tooltip-show-at-point (point))
 406         (let ((ov company-pseudo-tooltip-overlay))
 407           ;; With margins.
 408           (should (eq (overlay-get ov 'company-width) 8))
 409           (should (string= (overlay-get ov 'company-after)
 410                            " 123(4) \n 45     \n")))))))
 411
 412 (ert-deftest company-pseudo-tooltip-show-with-annotations-right-aligned ()
 413   :tags '(interactive)
 414   (with-temp-buffer
 415     (save-window-excursion
 416       (set-window-buffer nil (current-buffer))
 417       (insert " ")
 418       (save-excursion (insert "\n"))
 419       (let ((company-candidates-length 3)
 420             (company-backend (lambda (action &optional arg &rest _ignore)
 421                                (when (eq action 'annotation)
 422                                  (cdr (assoc arg '(("123" . "(4)")
 423                                                    ("67" . "(891011)")))))))
 424             (company-candidates '("123" "45" "67"))
 425             (company-tooltip-align-annotations t))
 426         (company-pseudo-tooltip-show-at-point (point))
 427         (let ((ov company-pseudo-tooltip-overlay))
 428           ;; With margins.
 429           (should (eq (overlay-get ov 'company-width) 13))
 430           (should (string= (overlay-get ov 'company-after)
 431                            " 123     (4) \n 45          \n 67 (891011) \n")))))))
 432
 433 (ert-deftest company-create-lines-shows-numbers ()
 434   (let ((company-show-numbers t)
 435         (company-candidates '("x" "y" "z"))
 436         (company-candidates-length 3)
 437         (company-backend 'ignore))
 438     (should (equal '(" x 1 " " y 2 " " z 3 ")
 439                    (company--create-lines 0 999)))))
 440
 441 (ert-deftest company-create-lines-truncates-annotations ()
 442   (let* ((ww (company--window-width))
 443          (data `(("1" . "(123)")
 444                  ("2" . nil)
 445                  ("3" . ,(concat "(" (make-string (- ww 2) ?4) ")"))
 446                  (,(make-string ww ?4) . "<4>")))
 447          (company-candidates (mapcar #'car data))
 448          (company-candidates-length 4)
 449          (company-tooltip-margin 1)
 450          (company-backend (lambda (cmd &optional arg)
 451                             (when (eq cmd 'annotation)
 452                               (cdr (assoc arg data)))))
 453          company-tooltip-align-annotations)
 454     (should (equal (list (format " 1(123)%s " (company-space-string (- ww 8)))
 455                          (format " 2%s " (company-space-string (- ww 3)))
 456                          (format " 3(444%s " (make-string (- ww 7) ?4))
 457                          (format " %s " (make-string (- ww 2) ?4)))
 458                    (company--create-lines 0 999)))
 459     (let ((company-tooltip-align-annotations t))
 460       (should (equal (list (format " 1%s(123) " (company-space-string (- ww 8)))
 461                            (format " 2%s " (company-space-string (- ww 3)))
 462                            (format " 3 (444%s " (make-string (- ww 8) ?4))
 463                            (format " %s " (make-string (- ww 2) ?4)))
 464                      (company--create-lines 0 999))))))
 465
 466 (ert-deftest company-column-with-composition ()
 467   (with-temp-buffer
 468     (insert "lambda ()")
 469     (compose-region 1 (1+ (length "lambda")) "\\")
 470     (should (= (company--column) 4))))
 471
 472 (ert-deftest company-column-with-line-prefix ()
 473   (with-temp-buffer
 474     (insert "foo")
 475     (put-text-property (point-min) (point) 'line-prefix "  ")
 476     (should (= (company--column) 5))))
 477
 478 (ert-deftest company-column-wth-line-prefix-on-empty-line ()
 479   (with-temp-buffer
 480     (insert "\n")
 481     (forward-char -1)
 482     (put-text-property (point-min) (point-max) 'line-prefix "  ")
 483     (should (= (company--column) 2))))
 484
 485 (ert-deftest company-plainify ()
 486   (let ((tab-width 8))
 487     (should (equal-including-properties
 488              (company-plainify "\tabc\td\t")
 489              (concat "        "
 490                      "abc     "
 491                      "d       "))))
 492   (should (equal-including-properties
 493            (company-plainify (propertize "foobar" 'line-prefix "-*-"))
 494            "-*-foobar")))
 495
 496 (ert-deftest company-modify-line ()
 497   (let ((str "-*-foobar"))
 498     (should (equal-including-properties
 499              (company-modify-line str "zz" 4)
 500              "-*-fzzbar"))
 501     (should (equal-including-properties
 502              (company-modify-line str "xx" 0)
 503              "xx-foobar"))
 504     (should (equal-including-properties
 505              (company-modify-line str "zz" 10)
 506              "-*-foobar zz"))))
 507
 508 (ert-deftest company-scrollbar-bounds ()
 509   (should (equal nil (company--scrollbar-bounds 0 3 3)))
 510   (should (equal nil (company--scrollbar-bounds 0 4 3)))
 511   (should (equal '(0 . 0) (company--scrollbar-bounds 0 1 2)))
 512   (should (equal '(1 . 1) (company--scrollbar-bounds 2 2 4)))
 513   (should (equal '(2 . 3) (company--scrollbar-bounds 7 4 12)))
 514   (should (equal '(1 . 2) (company--scrollbar-bounds 3 4 12)))
 515   (should (equal '(1 . 3) (company--scrollbar-bounds 4 5 11))))
 516
 517 ;;; Async
 518
 519 (defun company-async-backend (command &optional arg)
 520   (pcase command
 521     (`prefix "foo")
 522     (`candidates
 523      (cons :async
 524            (lambda (cb)
 525              (run-with-timer 0.05 nil
 526                              #'funcall cb '("abc" "abd")))))))
 527
 528 (ert-deftest company-call-backend-forces-sync ()
 529   (let ((company-backend 'company-async-backend)
 530         (company-async-timeout 0.1))
 531     (should (equal '("abc" "abd") (company-call-backend 'candidates)))))
 532
 533 (ert-deftest company-call-backend-errors-on-timeout ()
 534   (with-temp-buffer
 535     (let* ((company-backend (lambda (command &optional _arg)
 536                               (pcase command
 537                                 (`candidates (cons :async 'ignore)))))
 538            (company-async-timeout 0.1)
 539            (err (should-error (company-call-backend 'candidates "foo"))))
 540       (should (string-match-p "async timeout" (cadr err))))))
 541
 542 (ert-deftest company-call-backend-raw-passes-return-value-verbatim ()
 543   (let ((company-backend 'company-async-backend))
 544     (should (equal "foo" (company-call-backend-raw 'prefix)))
 545     (should (equal :async (car (company-call-backend-raw 'candidates "foo"))))
 546     (should (equal 'closure (cadr (company-call-backend-raw 'candidates "foo"))))))
 547
 548 (ert-deftest company-manual-begin-forces-async-candidates-to-sync ()
 549   (with-temp-buffer
 550     (company-mode)
 551     (let (company-frontends
 552           (company-backends (list 'company-async-backend)))
 553       (company-manual-begin)
 554       (should (equal "foo" company-prefix))
 555       (should (equal '("abc" "abd") company-candidates)))))
 556
 557 (ert-deftest company-idle-begin-allows-async-candidates ()
 558   (with-temp-buffer
 559     (company-mode)
 560     (let (company-frontends
 561           (company-backends (list 'company-async-backend)))
 562       (company-idle-begin (current-buffer) (selected-window)
 563                           (buffer-chars-modified-tick) (point))
 564       (should (null company-candidates))
 565       (sleep-for 0.1)
 566       (should (equal "foo" company-prefix))
 567       (should (equal '("abc" "abd") company-candidates)))))
 568
 569 (ert-deftest company-idle-begin-cancels-async-candidates-if-buffer-changed ()
 570   (with-temp-buffer
 571     (company-mode)
 572     (let (company-frontends
 573           (company-backends (list 'company-async-backend)))
 574       (company-idle-begin (current-buffer) (selected-window)
 575                           (buffer-chars-modified-tick) (point))
 576       (should (null company-candidates))
 577       (insert "a")
 578       (sleep-for 0.1)
 579       (should (null company-prefix))
 580       (should (null company-candidates)))))
 581
 582 (ert-deftest company-idle-begin-async-allows-immediate-callbacks ()
 583   (with-temp-buffer
 584     (company-mode)
 585     (let (company-frontends
 586           (company-backends
 587            (list (lambda (command &optional arg)
 588                    (pcase command
 589                      (`prefix (buffer-substring (point-min) (point)))
 590                      (`candidates
 591                       (let ((c (all-completions arg '("abc" "def"))))
 592                         (cons :async
 593                               (lambda (cb) (funcall cb c)))))
 594                      (`no-cache t)))))
 595           (company-minimum-prefix-length 0))
 596       (company-idle-begin (current-buffer) (selected-window)
 597                           (buffer-chars-modified-tick) (point))
 598       (should (equal '("abc" "def") company-candidates))
 599       (let ((last-command-event ?a))
 600         (company-call 'self-insert-command 1))
 601       (should (equal '("abc") company-candidates)))))
 602
 603 (ert-deftest company-multi-backend-forces-prefix-to-sync ()
 604   (with-temp-buffer
 605     (let ((company-backend (list 'ignore
 606                                  (lambda (command)
 607                                    (should (eq command 'prefix))
 608                                    (cons :async
 609                                          (lambda (cb)
 610                                            (run-with-timer
 611                                             0.01 nil
 612                                             (lambda () (funcall cb nil))))))
 613                                  (lambda (command)
 614                                    (should (eq command 'prefix))
 615                                    "foo"))))
 616       (should (equal "foo" (company-call-backend-raw 'prefix))))
 617     (let ((company-backend (list (lambda (_command)
 618                                    (cons :async
 619                                          (lambda (cb)
 620                                            (run-with-timer
 621                                             0.01 nil
 622                                             (lambda () (funcall cb "bar"))))))
 623                                  (lambda (_command)
 624                                    "foo"))))
 625       (should (equal "bar" (company-call-backend-raw 'prefix))))))
 626
 627 (ert-deftest company-multi-backend-merges-deferred-candidates ()
 628   (with-temp-buffer
 629     (let* ((immediate (lambda (command &optional arg)
 630                         (pcase command
 631                           (`prefix "foo")
 632                           (`candidates
 633                            (cons :async
 634                                  (lambda (cb) (funcall cb '("f"))))))))
 635            (company-backend (list 'ignore
 636                                   (lambda (command &optional arg)
 637                                     (pcase command
 638                                       (`prefix "foo")
 639                                       (`candidates
 640                                        (should (equal arg "foo"))
 641                                        (cons :async
 642                                              (lambda (cb)
 643                                                (run-with-timer
 644                                                 0.01 nil
 645                                                 (lambda () (funcall cb '("a" "b")))))))))
 646                                   (lambda (command &optional arg)
 647                                     (pcase command
 648                                       (`prefix "foo")
 649                                       (`candidates '("c" "d" "e"))))
 650                                   immediate)))
 651       (should (equal :async (car (company-call-backend-raw 'candidates "foo"))))
 652       (should (equal '("a" "b" "c" "d" "e" "f")
 653                      (company-call-backend 'candidates "foo")))
 654       (let ((company-backend (list immediate)))
 655         (should (equal '("f") (company-call-backend 'candidates "foo")))))))
 656
 657 ;;; Template
 658
 659 (ert-deftest company-template-removed-after-the-last-jump ()
 660   (with-temp-buffer
 661     (insert "{ }")
 662     (goto-char 2)
 663     (let ((tpl (company-template-declare-template (point) (1- (point-max)))))
 664       (save-excursion
 665         (dotimes (i 2)
 666           (insert " ")
 667           (company-template-add-field tpl (point) "foo")))
 668       (company-call 'template-forward-field)
 669       (should (= 3 (point)))
 670       (company-call 'template-forward-field)
 671       (should (= 7 (point)))
 672       (company-call 'template-forward-field)
 673       (should (= 11 (point)))
 674       (should (zerop (length (overlay-get tpl 'company-template-fields))))
 675       (should (null (overlay-buffer tpl))))))
 676
 677 (ert-deftest company-template-removed-after-input-and-jump ()
 678   (with-temp-buffer
 679     (insert "{ }")
 680     (goto-char 2)
 681     (let ((tpl (company-template-declare-template (point) (1- (point-max)))))
 682       (save-excursion
 683         (insert " ")
 684         (company-template-add-field tpl (point) "bar"))
 685       (company-call 'template-move-to-first tpl)
 686       (should (= 3 (point)))
 687       (dolist (c (string-to-list "tee"))
 688         (let ((last-command-event c))
 689           (company-call 'self-insert-command 1)))
 690       (should (string= "{ tee }" (buffer-string)))
 691       (should (overlay-buffer tpl))
 692       (company-call 'template-forward-field)
 693       (should (= 7 (point)))
 694       (should (null (overlay-buffer tpl))))))
 695
 696 (defun company-call (name &rest args)
 697   (let* ((maybe (intern (format "company-%s" name)))
 698          (command (if (fboundp maybe) maybe name)))
 699     (let ((this-command command))
 700       (run-hooks 'pre-command-hook))
 701     (apply command args)
 702     (let ((this-command command))
 703       (run-hooks 'post-command-hook))))
 704
 705 (ert-deftest company-template-c-like-templatify ()
 706   (with-temp-buffer
 707     (let ((text "foo(int a, short b)"))
 708       (insert text)
 709       (company-template-c-like-templatify text)
 710       (should (equal "foo(arg0, arg1)" (buffer-string)))
 711       (should (looking-at "arg0"))
 712       (should (equal "int a"
 713                      (overlay-get (company-template-field-at) 'display))))))
 714
 715 (ert-deftest company-template-c-like-templatify-trims-after-closing-paren ()
 716   (with-temp-buffer
 717     (let ((text "foo(int a, short b)!@ #1334 a"))
 718       (insert text)
 719       (company-template-c-like-templatify text)
 720       (should (equal "foo(arg0, arg1)" (buffer-string)))
 721       (should (looking-at "arg0")))))
 722
 723 ;;; Clang
 724
 725 (ert-deftest company-clang-objc-templatify ()
 726   (with-temp-buffer
 727     (let ((text "createBookWithTitle:andAuthor:"))
 728       (insert text)
 729       (company-clang-objc-templatify text)
 730       (should (equal "createBookWithTitle:arg0 andAuthor:arg1" (buffer-string)))
 731       (should (looking-at "arg0"))
 732       (should (null (overlay-get (company-template-field-at) 'display))))))