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