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yasnippet-tests.el
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yasnippet-tests.el
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;;; yasnippet-tests.el --- some yasnippet tests -*- lexical-binding: t -*-
;; Copyright (C) 2012-2015, 2017-2018, 2021 Free Software Foundation, Inc.
;; Author: João Távora <[email protected]>
;; Keywords: emulations, convenience
;; This program is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;; Test basic snippet mechanics and the loading system
;; To test this in emacs22 mac osx:
;; curl -L -O https://github.com/mirrors/emacs/raw/master/lisp/emacs-lisp/ert.el
;; curl -L -O https://github.com/mirrors/emacs/raw/master/lisp/emacs-lisp/ert-x.el
;; /usr/bin/emacs -nw -Q -L . -l yasnippet-tests.el --batch -e ert
;;; Code:
(require 'yasnippet)
(require 'ert)
(require 'ert-x)
(require 'cl-lib)
(require 'org)
;;; Helper macros and function
(defmacro yas-with-snippet-dirs (dirs &rest body)
(declare (indent defun) (debug t))
`(yas-call-with-snippet-dirs
,dirs #'(lambda () ,@body)))
(defun yas-should-expand (keys-and-expansions)
(dolist (key-and-expansion keys-and-expansions)
(yas-exit-all-snippets)
(erase-buffer)
(insert (car key-and-expansion))
(ert-simulate-command '(yas-expand))
(unless (string= (yas--buffer-contents) (cdr key-and-expansion))
(ert-fail (format "\"%s\" should have expanded to \"%s\" but got \"%s\""
(car key-and-expansion)
(cdr key-and-expansion)
(yas--buffer-contents)))))
(yas-exit-all-snippets))
(defun yas--collect-menu-items (menu-keymap)
(let ((yas--menu-items ()))
(map-keymap (lambda (_binding definition)
(when (eq (car-safe definition) 'menu-item)
(push definition yas--menu-items)))
menu-keymap)
yas--menu-items))
(defun yas-should-not-expand (keys)
(dolist (key keys)
(yas-exit-all-snippets)
(erase-buffer)
(insert key)
(ert-simulate-command '(yas-expand))
(unless (string= (yas--buffer-contents) key)
(ert-fail (format "\"%s\" should have stayed put, but instead expanded to \"%s\""
key
(yas--buffer-contents))))))
(defun yas-mock-insert (string)
(dotimes (i (length string))
(let ((last-command-event (aref string i)))
(ert-simulate-command '(self-insert-command 1)))))
(defun yas-mock-yank (string)
(let ((interprogram-paste-function (lambda () string)))
(ert-simulate-command '(yank nil))))
(defun yas--key-binding (key)
"Like `key-binding', but override `this-command-keys-vector'.
This lets `yas--maybe-expand-from-keymap-filter' work as expected."
(cl-letf (((symbol-function 'this-command-keys-vector)
(lambda () (cl-coerce key 'vector))))
(key-binding key)))
(defun yas-make-file-or-dirs (ass)
(let ((file-or-dir-name (car ass))
(content (cdr ass)))
(cond ((listp content)
(make-directory file-or-dir-name 'parents)
(let ((default-directory (concat default-directory "/" file-or-dir-name)))
(mapc #'yas-make-file-or-dirs content)))
((stringp content)
(with-temp-buffer
(insert content)
(write-region nil nil file-or-dir-name nil 'nomessage)))
(t
(message "[yas] oops don't know this content")))))
(defun yas-variables ()
(let ((syms))
(mapatoms #'(lambda (sym)
(if (and (string-match "^yas-[^/]" (symbol-name sym))
(boundp sym))
(push sym syms))))
syms))
(defun yas-call-with-saving-variables (fn)
(let* ((vars (yas-variables))
(saved-values (mapcar #'symbol-value vars)))
(unwind-protect
(funcall fn)
(cl-loop for var in vars
for saved in saved-values
do (set var saved)))))
(defun yas-call-with-snippet-dirs (dirs fn)
(let* ((default-directory (make-temp-file "yasnippet-fixture" t))
(yas-snippet-dirs (mapcar (lambda (d) (expand-file-name (car d))) dirs)))
(with-temp-message ""
(unwind-protect
(progn
(mapc #'yas-make-file-or-dirs dirs)
(funcall fn))
(when (>= emacs-major-version 24)
(delete-directory default-directory 'recursive))))))
;;; Older emacsen
;;;
(unless (fboundp 'special-mode)
;; FIXME: Why provide this default definition here?!?
(defalias 'special-mode 'fundamental))
(unless (fboundp 'string-suffix-p)
;; introduced in Emacs 24.4
(defun string-suffix-p (suffix string &optional ignore-case)
"Return non-nil if SUFFIX is a suffix of STRING.
If IGNORE-CASE is non-nil, the comparison is done without paying
attention to case differences."
(let ((start-pos (- (length string) (length suffix))))
(and (>= start-pos 0)
(eq t (compare-strings suffix nil nil
string start-pos nil ignore-case))))))
;;; Snippet mechanics
(defun yas--buffer-contents ()
(buffer-substring-no-properties (point-min) (point-max)))
(ert-deftest field-navigation ()
(with-temp-buffer
(yas-minor-mode 1)
(yas-expand-snippet "${1:brother} from ${2:another} ${3:mother}")
(should (string= (yas--buffer-contents)
"brother from another mother"))
(should (looking-at "brother"))
(ert-simulate-command '(yas-next-field-or-maybe-expand))
(should (looking-at "another"))
(ert-simulate-command '(yas-next-field-or-maybe-expand))
(should (looking-at "mother"))
(ert-simulate-command '(yas-prev-field))
(should (looking-at "another"))
(ert-simulate-command '(yas-prev-field))
(should (looking-at "brother"))))
(ert-deftest simple-mirror ()
(with-temp-buffer
(yas-minor-mode 1)
(yas-expand-snippet "${1:brother} from another $1")
(should (string= (yas--buffer-contents)
"brother from another brother"))
(yas-mock-insert "bla")
(should (string= (yas--buffer-contents)
"bla from another bla"))))
(ert-deftest mirror-with-transformation ()
(with-temp-buffer
(yas-minor-mode 1)
(yas-expand-snippet "${1:brother} from another ${1:$(upcase yas-text)}")
(should (string= (yas--buffer-contents)
"brother from another BROTHER"))
(yas-mock-insert "bla")
(should (string= (yas--buffer-contents)
"bla from another BLA"))))
(ert-deftest yas-mirror-many-fields ()
(with-temp-buffer
(yas-minor-mode 1)
(yas-expand-snippet "${1:brother} and ${2:brother} are${1:$(if (string= (yas-field-value 1) (yas-field-value 2)) \" \" \" not \")}the same word")
(should (string= (yas--buffer-contents)
"brother and brother are the same word"))
(yas-mock-insert "bla")
(should (string= (yas--buffer-contents)
"bla and brother are not the same word"))
(ert-simulate-command '(yas-next-field-or-maybe-expand))
(yas-mock-insert "bla")
(should (string= (yas--buffer-contents)
"bla and bla are the same word"))))
(ert-deftest mirror-with-transformation-and-autofill ()
"Test interaction of autofill with mirror transforms"
(let ((words "one two three four five")
filled-words)
(with-temp-buffer
(c-mode) ; In `c-mode' filling comments works by narrowing.
(yas-minor-mode +1)
(setq fill-column 10)
(auto-fill-mode +1)
(yas-expand-snippet "/* $0\n */")
(yas-mock-insert words)
(setq filled-words (delete-and-extract-region (point-min) (point-max)))
(yas-expand-snippet "/* $1\n */\n$2$2")
(should (string= (yas--buffer-contents)
"/* \n */\n"))
(yas-mock-insert words)
(should (string= (yas--buffer-contents)
(concat filled-words "\n"))))))
(ert-deftest auto-fill-with-multiparagraph ()
"Test auto-fill protection on snippet spanning multiple paragraphs"
(with-temp-buffer
(yas-minor-mode +1)
(auto-fill-mode +1)
(yas-expand-snippet "foo$1\n\n$2bar")
(yas-mock-insert " ")
(ert-simulate-command '(yas-next-field-or-maybe-expand))
(should (looking-at "bar"))))
(ert-deftest primary-field-transformation ()
(with-temp-buffer
(yas-minor-mode 1)
(let ((snippet "${1:$$(upcase yas-text)}${1:$(concat \"bar\" yas-text)}"))
(yas-expand-snippet snippet)
(should (string= (yas--buffer-contents) "bar"))
(yas-mock-insert "foo")
(should (string= (yas--buffer-contents) "FOObarFOO")))))
(ert-deftest nested-placeholders-kill-superfield ()
(with-temp-buffer
(yas-minor-mode 1)
(yas-expand-snippet "brother from ${2:another ${3:mother}}!")
(should (string= (yas--buffer-contents)
"brother from another mother!"))
(yas-mock-insert "bla")
(should (string= (yas--buffer-contents)
"brother from bla!"))))
(ert-deftest nested-placeholders-use-subfield ()
(with-temp-buffer
(yas-minor-mode 1)
(yas-expand-snippet "brother from ${2:another ${3:mother}}!")
(ert-simulate-command '(yas-next-field-or-maybe-expand))
(yas-mock-insert "bla")
(should (string= (yas--buffer-contents)
"brother from another bla!"))))
(ert-deftest mirrors-adjacent-to-fields-with-nested-mirrors ()
(with-temp-buffer
(yas-minor-mode 1)
(yas-expand-snippet "<%= f.submit \"${1:Submit}\"${2:$(and (yas-text) \", :disable_with => '\")}${2:$1ing...}${2:$(and (yas-text) \"'\")} %>")
(should (string= (yas--buffer-contents)
"<%= f.submit \"Submit\", :disable_with => 'Submiting...' %>"))
(yas-mock-insert "Send")
(should (string= (yas--buffer-contents)
"<%= f.submit \"Send\", :disable_with => 'Sending...' %>"))))
(ert-deftest deep-nested-mirroring-issue-351 ()
(with-temp-buffer
(yas-minor-mode 1)
(yas-expand-snippet "${1:FOOOOOOO}${2:$1}${3:$2}${4:$3}")
(yas-mock-insert "abc")
(should (string= (yas--buffer-contents) "abcabcabcabc"))))
(ert-deftest delete-numberless-inner-snippet-issue-562 ()
(with-temp-buffer
(yas-minor-mode 1)
(yas-expand-snippet "${3:${test}bla}$0${2:ble}")
(ert-simulate-command '(yas-next-field-or-maybe-expand))
(should (looking-at "testblable"))
(ert-simulate-command '(yas-next-field-or-maybe-expand))
(ert-simulate-command '(yas-skip-and-clear-field))
(should (looking-at "ble"))
(should (null (yas-active-snippets)))))
(ert-deftest delete-nested-simple-field-issue-824 ()
"Test deleting a field with a nested simple field in it."
(with-temp-buffer
(yas-minor-mode 1)
(yas-expand-snippet "${3:so-$4and}$0${2:-so}")
(ert-simulate-command '(yas-next-field-or-maybe-expand))
(should (looking-at "so-and-so"))
(ert-simulate-command '(yas-skip-and-clear-or-delete-char))
(should (looking-at "-so"))
(should (null (yas-active-snippets)))))
(ert-deftest ignore-trailing-whitespace ()
(should (equal
(with-temp-buffer
(insert "# key: foo\n# --\nfoo")
(yas--parse-template))
(with-temp-buffer
(insert "# key: foo \n# --\nfoo")
(yas--parse-template)))))
;; (ert-deftest in-snippet-undo ()
;; (with-temp-buffer
;; (yas-minor-mode 1)
;; (yas-expand-snippet "brother from ${2:another ${3:mother}}!")
;; (ert-simulate-command '(yas-next-field-or-maybe-expand))
;; (yas-mock-insert "bla")
;; (ert-simulate-command '(undo))
;; (should (string= (yas--buffer-contents)
;; "brother from another mother!"))))
(ert-deftest undo-redo ()
"Check redoing of snippet undo."
(yas-with-snippet-dirs '((".emacs.d/snippets"
("emacs-lisp-mode" ("x" . "${1:one},and done"))))
(with-temp-buffer
(emacs-lisp-mode)
(yas-reload-all)
(yas-minor-mode 1)
(yas-expand-snippet "x$0")
(let ((pre-expand-string (buffer-string)))
(setq buffer-undo-list nil)
(ert-simulate-command '(yas-expand))
(push nil buffer-undo-list)
(ert-simulate-command '(yas-next-field)) ; $1 -> exit snippet.
(should (string-match-p "\\`one,and done" (buffer-string)))
(push nil buffer-undo-list)
(ert-simulate-command '(undo)) ; Revive snippet.
(ert-simulate-command '(undo)) ; Undo expansion.
(should (string= (buffer-string) pre-expand-string))
(ert-simulate-command '(move-end-of-line 1))
(push nil buffer-undo-list)
(ert-simulate-command '(undo)) ; Redo (re-expand snippet).
(should (string-match-p "\\`one,and done" (buffer-string)))))))
(ert-deftest undo-revive-and-do-again ()
"Check undo-revived snippet is properly ended."
;; See https://github.com/joaotavora/yasnippet/issues/1006.
(yas-with-snippet-dirs '((".emacs.d/snippets"
("emacs-lisp-mode" ("x" . "${1:one},and done"))))
(with-temp-buffer
(emacs-lisp-mode)
(yas-reload-all)
(yas-minor-mode 1)
(yas-expand-snippet "x$0")
(setq buffer-undo-list nil)
(ert-simulate-command '(yas-expand))
(push nil buffer-undo-list)
(ert-simulate-command '(yas-next-field)) ; $1 -> exit snippet.
(should (string-match-p "\\`one,and done" (buffer-string)))
(push nil buffer-undo-list)
(ert-simulate-command '(undo)) ; Revive snippet.
(yas-mock-insert "abc")
(ert-simulate-command '(yas-next-field)) ; $1 -> exit snippet again.
(should (string-match-p "\\`abc,and done" (buffer-string)))
;; We should have exited snippet and cleaned up any overlays.
(should-not (cl-some (lambda (o) (overlay-get o 'yas--snippet))
(overlays-in (point-min) (point-max)))))))
(defun yas-test-expand-and-undo (mode snippet-entry initial-contents)
(yas-with-snippet-dirs
`((".emacs.d/snippets" (,(symbol-name mode) ,snippet-entry)))
(with-temp-buffer
(funcall mode)
(yas-reload-all)
(yas-minor-mode 1)
(yas-expand-snippet initial-contents)
(let ((pre-expand-string (buffer-string)))
(setq buffer-undo-list ())
(ert-simulate-command '(yas-expand))
;; Need undo barrier, I think command loop puts it normally.
(push nil buffer-undo-list)
(ert-simulate-command '(undo))
(should (string= (buffer-string) pre-expand-string))))))
(ert-deftest undo-indentation-1 ()
"Check undoing works when only line of snippet is indented."
(let ((yas-also-auto-indent-first-line t))
(yas-test-expand-and-undo
'emacs-lisp-mode '("s" . "(setq $0)") "(let\n(while s$0")))
(ert-deftest undo-indentation-2 ()
"Check undoing works when only line of snippet is indented."
(let ((yas-also-auto-indent-first-line t)
(indent-tabs-mode nil))
(yas-test-expand-and-undo
'emacs-lisp-mode '("t" . "; TODO") "t$0")))
(ert-deftest undo-indentation-multiline-1 ()
"Check undoing works when 1st line of multi-line snippet is indented."
(let ((yas-also-auto-indent-first-line t)
(indent-tabs-mode nil))
(yas-test-expand-and-undo
'js-mode '("if" . "if ($1) {\n\n}\n")
"if$0\nabc = 123456789 + abcdef;")))
(ert-deftest undo-indentation-multiline-2 ()
"Check undoing works when 2nd line of multi-line snippet is indented."
(let ((yas-also-auto-indent-first-line t)
(indent-tabs-mode nil))
(yas-test-expand-and-undo
'js-mode '("if" . "if (true) {\n${1:foo};\n}\n")
"if$0\nabc = 123456789 + abcdef;")))
(ert-deftest dont-clear-on-partial-deletion-issue-515 ()
"Ensure fields are not cleared when user doesn't really mean to."
(with-temp-buffer
(yas-minor-mode 1)
(yas-expand-snippet "my ${1:kid brother} from another ${2:mother}")
(ert-simulate-command '(kill-word 1))
(ert-simulate-command '(delete-char 1))
(should (string= (yas--buffer-contents)
"my brother from another mother"))
(should (looking-at "brother"))
(ert-simulate-command '(yas-next-field))
(should (looking-at "mother"))
(ert-simulate-command '(yas-prev-field))
(should (looking-at "brother"))))
(ert-deftest do-clear-on-yank-issue-515 ()
"A yank should clear an unmodified field."
(with-temp-buffer
(yas-minor-mode 1)
(yas-expand-snippet "my ${1:kid brother} from another ${2:mother}")
(yas-mock-yank "little sibling")
(should (string= (yas--buffer-contents)
"my little sibling from another mother"))
(ert-simulate-command '(yas-next-field))
(ert-simulate-command '(yas-prev-field))
(should (looking-at "little sibling"))))
(ert-deftest basic-indentation ()
(with-temp-buffer
(ruby-mode)
(yas-minor-mode 1)
(set (make-local-variable 'yas-indent-line) 'auto)
(set (make-local-variable 'yas-also-auto-indent-first-line) t)
(yas-expand-snippet "def ${1:method}${2:(${3:args})}\n$0\nend")
;; Note that empty line is not indented.
(should (string= "def method(args)
end" (buffer-string)))
(cl-loop repeat 3 do (ert-simulate-command '(yas-next-field)))
(yas-mock-insert (make-string (random 5) ?\ )) ; purposedly mess up indentation
(yas-expand-snippet "class << ${self}\n $0\nend")
(ert-simulate-command '(yas-next-field))
(should (string= "def method(args)
class << self
end
end" (buffer-string)))
(should (= 4 (current-column)))))
(ert-deftest yas-also-indent-empty-lines ()
"Respect `yas-also-indent-empty-lines' setting."
(with-temp-buffer
(ruby-mode)
(yas-minor-mode 1)
(set (make-local-variable 'yas-indent-line) 'auto)
(set (make-local-variable 'yas-also-auto-indent-first-line) t)
(set (make-local-variable 'yas-also-indent-empty-lines) t)
(yas-expand-snippet "def foo\n\nend")
(should (string= "def foo\n \nend" (buffer-string)))
;; Test that it keeps working without setting
;; `yas-also-auto-indent-first-line'.
(setq yas-also-auto-indent-first-line nil)
(erase-buffer)
(yas-expand-snippet "def foo\n\nend")
(should (string= "def foo\n \nend" (buffer-string)))))
(ert-deftest yas-indent-first-line ()
(with-temp-buffer
(ruby-mode)
(yas-minor-mode 1)
(set (make-local-variable 'yas-indent-line) 'auto)
(set (make-local-variable 'yas-also-auto-indent-first-line) nil)
(set (make-local-variable 'yas-also-indent-empty-lines) nil)
(yas-expand-snippet "def foo\n$0\nend\n")
;; First (and only) line should not indent.
(yas-expand-snippet "#not indented")
(should (equal "def foo\n#not indented\nend\n" (buffer-string)))))
(ert-deftest yas-indent-first-line-fixed ()
(with-temp-buffer
(ruby-mode)
(yas-minor-mode 1)
(set (make-local-variable 'yas-indent-line) 'fixed)
(set (make-local-variable 'yas-also-auto-indent-first-line) nil)
(set (make-local-variable 'yas-also-indent-empty-lines) nil)
(yas-expand-snippet " def foo\n $0\n end\n")
;; First (and only) line should not indent.
(yas-expand-snippet "#not more indented")
(should (equal " def foo\n #not more indented\n end\n" (buffer-string)))))
(ert-deftest indentation-markers ()
"Test a snippet with indentation markers (`$<')."
(with-temp-buffer
(ruby-mode)
(yas-minor-mode 1)
(set (make-local-variable 'yas-indent-line) nil)
(yas-expand-snippet "def ${1:method}${2:(${3:args})}\n$>Indent\nNo indent\\$>\nend")
(should (string= "def method(args)
Indent
No indent$>
end" (buffer-string)))))
(ert-deftest single-line-multi-mirror-indentation ()
"Make sure not to indent with multiple mirrors per line."
;; See also Github issue #712.
(with-temp-buffer
(text-mode)
(yas-minor-mode 1)
(yas-expand-snippet "${1:XXXXX} --------
$1 ---------------- $1 ----
$1 ------------------------")
(should (string= (yas--buffer-contents) "XXXXX --------
XXXXX ---------------- XXXXX ----
XXXXX ------------------------"))))
(ert-deftest single-line-multi-mirror-indentation-2 ()
"Like `single-line-multi-mirror-indentation' but 2 mirrors interleaved."
;; See also Github issue #768.
(with-temp-buffer
(c-mode)
(yas-minor-mode 1)
(yas-expand-snippet "${1:one} ${2:two};\n$1 $2_;\n$2 $1_;\n")
(should (string= (yas--buffer-contents)
"one two;\none two_;\ntwo one_;\n"))))
(ert-deftest indent-org-property ()
"Handling of `org-mode' property indentation, see `org-property-format'."
;; This is an interesting case because `org-indent-line' calls
;; `replace-match' for properties.
(with-temp-buffer
(org-mode)
(yas-minor-mode +1)
(yas-expand-snippet "* Test ${1:test}\n:PROPERTIES:\n:ID: $1-after\n:END:")
(yas-mock-insert "foo bar")
(ert-simulate-command '(yas-next-field))
(goto-char (point-min))
;; The default value of `org-adapt-indentation' changed between Org-mode 9.4
;; and 9.5, so force a specific value.
(let* ((org-adapt-indentation nil)
(expected (with-temp-buffer
(insert (format (concat "* Test foo bar\n"
org-property-format "\n"
org-property-format "\n"
org-property-format)
":PROPERTIES:" ""
":ID:" "foo bar-after"
":END:" ""))
(delete-trailing-whitespace)
(buffer-string))))
;; Some org-mode versions leave trailing whitespace, some don't.
(delete-trailing-whitespace)
(should (equal expected (buffer-string))))))
(ert-deftest indent-cc-mode ()
"Handling of cc-mode's indentation."
;; This is an interesting case because cc-mode deletes all the
;; indentation before recreating it.
(with-temp-buffer
(c++-mode)
(yas-minor-mode +1)
(yas-expand-snippet "\
int foo()
{
if ($1) {
delete $1;
$1 = 0;
}
}")
(yas-mock-insert "var")
(should (string= "\
int foo()
{
if (var) {
delete var;
var = 0;
}
}" (buffer-string)))))
(ert-deftest indent-cc-mode-2 ()
"Handling of cc-mode's preprocessor indentation."
(with-temp-buffer
(c-mode)
(yas-minor-mode +1)
(yas-expand-snippet "\
#ifndef `\"FOO\"`
#define FOO
#endif
")
(should (string= "\
#ifndef FOO
#define FOO
#endif
" (buffer-substring-no-properties (point-min) (point-max))))))
(ert-deftest indent-snippet-mode ()
"Handling of snippet-mode indentation."
;; This is an interesting case because newlines match [[:space:]] in
;; snippet-mode.
(with-temp-buffer
(snippet-mode)
(yas-minor-mode +1)
(yas-expand-snippet "# -*- mode: snippet -*-\n# name: $1\n# key: $1\n# --\n")
(yas-mock-insert "foo")
(should (string= "# -*- mode: snippet -*-\n# name: foo\n# key: foo\n# --\n"
(buffer-string)))))
(ert-deftest indent-mirrors-on-update ()
"Check that mirrors are always kept indented."
(with-temp-buffer
(ruby-mode)
(yas-minor-mode 1)
(yas-expand-snippet "def $1\n$1\nend")
(yas-mock-insert "xxx")
;; Assuming 2 space indent.
(should (string= "def xxx\n xxx\nend" (buffer-string)))))
(defun yas-test-delete-and-insert-command (beg end new)
"Simulate a completion command (similar to company-mode)."
(interactive "r\ns")
;; Simulate a completion command (like what company-mode does)
;; which deletes the "xxx" and then replaces it with something
;; else.
(delete-region beg end)
(insert new))
(ert-deftest indent-mirrors-on-complex-update ()
"Don't get messed up by command that deletes and then inserts."
(with-temp-buffer
(ruby-mode)
(yas-minor-mode 1)
(yas-expand-snippet "def foo\n ${1:slice} = append($1)\nend")
(yas-mock-insert "xxx")
(ert-simulate-command `(yas-test-delete-and-insert-command
,(- (point) 3) ,(point) ,"yyy"))
;; Assuming 2 space indent.
(should (string= "def foo\n yyy = append(yyy)\nend" (buffer-string)))))
(ert-deftest snippet-with-multiline-mirrors-issue-665 ()
"In issue 665, a multi-line mirror is attempted."
(with-temp-buffer
(ruby-mode)
(yas-minor-mode 1)
(yas-expand-snippet "def initialize(${1:params})\n$2${1:$(
mapconcat #'(lambda (arg)
(format \"@%s = %s\" arg arg))
(split-string yas-text \", \")
\"\n\")}\nend")
(yas-mock-insert "bla, ble, bli")
(ert-simulate-command '(yas-next-field))
(let ((expected (mapconcat #'identity
'("@bla = bla"
;; assume ruby is always indented to 2 spaces
" @ble = ble"
" @bli = bli")
"\n")))
(should (looking-at expected))
(yas-mock-insert "blo")
(ert-simulate-command '(yas-prev-field))
(ert-simulate-command '(yas-next-field))
(should (looking-at (concat "blo" expected))))))
(defmacro yas-saving-variables (&rest body)
(declare (debug t))
`(yas-call-with-saving-variables #'(lambda () ,@body)))
(ert-deftest auto-next-field ()
"Automatically exit a field after evaluating its transform."
(with-temp-buffer
(yas-saving-variables
(yas-with-snippet-dirs
`((".emacs.d/snippets"
("ruby-mode" ("snip" . ,(concat "foo ${1:$$"
(prin1-to-string '(yas-auto-next
(yas-choose-value
"bar" "foo")))
"} ${2:$$"
(prin1-to-string '(yas-auto-next
(yas-choose-value
"too" "foo")))
"} baz ${3:quinn} quinn")))))
(yas-reload-all)
(ruby-mode)
(yas-minor-mode 1)
(set (make-local-variable 'yas-prompt-functions) `(yas-no-prompt))
(yas-mock-insert "snip")
(ert-simulate-command '(yas-expand))
(yas-mock-insert "quux")
(should (equal "foo bar too baz quux quinn" (buffer-string)))))))
;;; Snippet expansion and character escaping
;;; Thanks to @zw963 (Billy) for the testing
;;;
(ert-deftest escape-dollar ()
(with-temp-buffer
(yas-minor-mode 1)
(yas-expand-snippet "bla\\${1:bla}ble")
(should (string= (yas--buffer-contents) "bla${1:bla}ble"))))
(ert-deftest escape-closing-brace ()
(with-temp-buffer
(yas-minor-mode 1)
(yas-expand-snippet "bla${1:bla\\}}ble")
(should (string= (yas--buffer-contents) "blabla}ble"))
(should (string= (yas-field-value 1) "bla}"))))
(ert-deftest escape-backslashes ()
(with-temp-buffer
(yas-minor-mode 1)
(yas-expand-snippet "bla\\ble")
(should (string= (yas--buffer-contents) "bla\\ble"))))
(ert-deftest escape-backquotes ()
(with-temp-buffer
(yas-minor-mode 1)
(yas-expand-snippet "bla`(upcase \"foo\\`bar\")`ble")
(should (string= (yas--buffer-contents) "blaFOO`BARble"))))
(ert-deftest escape-some-elisp-with-strings ()
"elisp with strings and unbalance parens inside it"
(with-temp-buffer
(yas-minor-mode 1)
;; The rules here is: to output a literal `"' you need to escape
;; it with one backslash. You don't need to escape them in
;; embedded elisp.
(yas-expand-snippet "soon \\\"`(concat (upcase \"(my arms\")\"\\\" were all around her\")`")
(should (string= (yas--buffer-contents) "soon \"(MY ARMS\" were all around her"))))
(ert-deftest escape-some-elisp-with-backslashes ()
(with-temp-buffer
(yas-minor-mode 1)
;; And the rule here is: to output a literal `\' inside a string
;; inside embedded elisp you need a total of six `\'
(yas-expand-snippet "bla`(upcase \"hey\\\\\\yo\")`ble")
(should (string= (yas--buffer-contents) "blaHEY\\YOble"))))
(ert-deftest be-careful-when-escaping-in-yas-selected-text ()
(with-temp-buffer
(yas-minor-mode 1)
(let ((yas-selected-text "He\\\\o world!"))
(yas-expand-snippet "Look ma! `(yas-selected-text)`")
(should (string= (yas--buffer-contents) "Look ma! He\\\\o world!")))
(yas-exit-all-snippets)
(erase-buffer)
(let ((yas-selected-text "He\"o world!"))
(yas-expand-snippet "Look ma! `(yas-selected-text)`")
(should (string= (yas--buffer-contents) "Look ma! He\"o world!")))
(yas-exit-all-snippets)
(erase-buffer)
(let ((yas-selected-text "He\"\)\\o world!"))
(yas-expand-snippet "Look ma! `(yas-selected-text)`")
(should (string= (yas--buffer-contents) "Look ma! He\"\)\\o world!")))
(yas-exit-all-snippets)
(erase-buffer)))
(ert-deftest be-careful-when-escaping-in-yas-selected-text-2 ()
(with-temp-buffer
(yas-minor-mode 1)
(let ((yas-selected-text "He)}o world!"))
(yas-expand-snippet "Look ma! ${1:`(yas-selected-text)`} OK?")
(should (string= (yas--buffer-contents) "Look ma! He)}o world! OK?")))))
(ert-deftest escaping-for-lsp-style-snippet-syntax ()
"See Github #979."
(should
(string= (with-temp-buffer
(yas-minor-mode 1)
(yas-expand-snippet
"Printf(${1:format string}, ${2:args ...interface{\\}})${0}")
(yas--buffer-contents))
(with-temp-buffer
(yas-minor-mode 1)
(yas-expand-snippet
"Printf(${1:format string}, ${2:args ...interface\\{\\}})${0}")
(yas--buffer-contents)))))
(ert-deftest insert-snippet-with-backslashes-in-active-field ()
;; This test case fails if `yas--inhibit-overlay-hooks' is not bound
;; in `yas-expand-snippet' (see Github #844).
(with-temp-buffer
(yas-minor-mode 1)
(yas-expand-snippet "${1:$$(if (not yas-modified-p) \"a\")}")
(yas-expand-snippet "\\\\alpha")))
(ert-deftest expand-with-unused-yas-selected-text ()
(with-temp-buffer
(yas-with-snippet-dirs
'((".emacs.d/snippets"
("emacs-lisp-mode"
("foo" . "expanded `yas-selected-text`foo"))))
(yas-reload-all)
(emacs-lisp-mode)
(yas-minor-mode +1)
(insert "foo")
(ert-simulate-command '(yas-expand))
(should (equal (buffer-string) "expanded foo")))))
(ert-deftest yas-expand-command-snippet ()
(with-temp-buffer
(yas-with-snippet-dirs
'((".emacs.d/snippets"
("emacs-lisp-mode"
("foo" . "\
# type: command
# --
\(insert \"expanded foo\")"))))
(yas-reload-all)
(emacs-lisp-mode)
(yas-minor-mode +1)
(insert "foo")
(ert-simulate-command '(yas-expand))
(should (equal (buffer-string) "expanded foo")))))
(ert-deftest example-for-issue-271 ()
(with-temp-buffer
(yas-minor-mode 1)
(let ((yas-selected-text "aaa")
(snippet "if ${1:condition}\n`yas-selected-text`\nelse\n$3\nend"))
(yas-expand-snippet snippet)
(yas-next-field)
(yas-mock-insert "bbb")
(should (string= (yas--buffer-contents) "if condition\naaa\nelse\nbbb\nend")))))
(ert-deftest yas-no-memory-of-bad-snippet ()
"Expanding an incorrect snippet should not influence future expansions."
;; See https://github.com/joaotavora/yasnippet/issues/800.
(with-temp-buffer
(yas-minor-mode 1)
(yas-expand-snippet "```foo\n\n```")
(erase-buffer) ; Bad snippet may leave wrong text.
;; But expanding the corrected snippet should work fine.
(yas-expand-snippet "\\`\\`\\`foo\n\n\\`\\`\\`")
(should (equal (buffer-string) "```foo\n\n```"))))
(defmacro yas--with-font-locked-temp-buffer (&rest body)
"Like `with-temp-buffer', but ensure `font-lock-mode'."
;; NOTE: Replace all uses of this with `font-lock-ensure' when we
;; drop support for Emacs 24.
(declare (indent 0) (debug t))
(let ((temp-buffer (make-symbol "temp-buffer")))
;; NOTE: buffer name must not start with a space, otherwise
;; `font-lock-mode' doesn't turn on.
`(let ((,temp-buffer (generate-new-buffer "*yas-temp*")))
(with-current-buffer ,temp-buffer
;; pretend we're interactive so `font-lock-mode' turns on
(let ((noninteractive nil)
;; turn on font locking after major mode change
(change-major-mode-after-body-hook #'font-lock-mode))
(unwind-protect
(progn (require 'font-lock)
;; turn on font locking before major mode change
(font-lock-mode +1)
,@body)
(and (buffer-name ,temp-buffer)
(kill-buffer ,temp-buffer))))))))
(ert-deftest example-for-issue-474 ()
;; This issue only reproduces in Emacs 24.3, most likely due to some
;; bug in the cc-mode included with that Emacs version.
(yas--with-font-locked-temp-buffer
(c-mode)
(yas-minor-mode 1)
(insert "#include <foo>\n")
(let ((yas-good-grace nil)) (yas-expand-snippet "`\"TODO: \"`"))
(should (string= (yas--buffer-contents) "#include <foo>\nTODO: "))))
(ert-deftest example-for-issue-404 ()
(yas--with-font-locked-temp-buffer
(c++-mode)
(yas-minor-mode 1)
(insert "#include <foo>\n")
(let ((yas-good-grace nil)) (yas-expand-snippet "main"))
(should (string= (yas--buffer-contents) "#include <foo>\nmain"))))
(ert-deftest example-for-issue-404-c-mode ()
(yas--with-font-locked-temp-buffer
(c-mode)
(yas-minor-mode 1)
(insert "#include <foo>\n")
(let ((yas-good-grace nil)) (yas-expand-snippet "main"))
(should (string= (yas--buffer-contents) "#include <foo>\nmain"))))
(ert-deftest middle-of-buffer-snippet-insertion ()
(with-temp-buffer
(yas-minor-mode 1)
(insert "beginning")
(save-excursion (insert "end"))
(yas-expand-snippet "-middle-")
(should (string= (yas--buffer-contents) "beginning-middle-end"))))
(ert-deftest another-example-for-issue-271 ()
;; expect this to fail in batch mode since `region-active-p' doesn't
;; used by `yas-expand-snippet' doesn't make sense in that context.
;;
:expected-result (if noninteractive
:failed
:passed)
(with-temp-buffer
(yas-minor-mode 1)
(let ((snippet "\\${${1:1}:`yas-selected-text`}"))
(insert "aaabbbccc")
(set-mark 4)
(goto-char 7)
(yas-expand-snippet snippet)
(should (string= (yas--buffer-contents) "aaa${1:bbb}ccc")))))
(ert-deftest string-match-with-subregexp-in-embedded-elisp ()
(with-temp-buffer
(yas-minor-mode 1)
;; the rule here is: To use regexps in embedded `(elisp)` expressions, write
;; it like you would normal elisp, i.e. no need to escape the backslashes.
(let ((snippet "`(if (string-match \"foo\\\\(ba+r\\\\)foo\" \"foobaaaaaaaaaarfoo\")
\"ok\"
\"fail\")`"))
(yas-expand-snippet snippet))
(should (string= (yas--buffer-contents) "ok"))))
(ert-deftest string-match-with-subregexp-in-mirror-transformations ()
(with-temp-buffer
(yas-minor-mode 1)
;; the rule here is: To use regexps in embedded `(elisp)` expressions,
;; escape backslashes once, i.e. to use \\( \\) constructs, write \\\\( \\\\).
(let ((snippet "$1${1:$(if (string-match \"foo\\\\\\\\(ba+r\\\\\\\\)baz\" yas-text)
\"ok\"
\"fail\")}"))
(yas-expand-snippet snippet)
(should (string= (yas--buffer-contents) "fail"))
(yas-mock-insert "foobaaar")
(should (string= (yas--buffer-contents) "foobaaarfail"))
(yas-mock-insert "baz")
(should (string= (yas--buffer-contents) "foobaaarbazok")))))
(ert-deftest yas-escaping-close-brace ()
"Close braces may be escaped with braces, reduction from eglot issue.
See https://github.com/joaotavora/eglot/issues/336."
(with-temp-buffer
(yas-minor-mode +1)
;; NOTE: put a period at the end to avoid the bug tested by
;; `protection-overlay-no-cheating'.
(yas-expand-snippet "${1:one{\\}}, ${2:two{\\}}.")
(yas-next-field)
(yas-next-field)
(should (string= (buffer-string) "one{}, two{}."))))
;;; Misc tests
;;;
(ert-deftest protection-overlay-no-cheating ()
"Protection overlays at the very end of the buffer are dealt
with by cheatingly inserting a newline!
TODO: correct this bug!"
:expected-result :failed
(with-temp-buffer
(yas-minor-mode 1)
(yas-expand-snippet "${2:brother} from another ${1:mother}")
(should (string= (yas--buffer-contents)
"brother from another mother") ;; no newline should be here!
)))
(defvar yas-tests--ran-exit-hook nil)
(ert-deftest snippet-exit-hooks ()
(with-temp-buffer
(yas-saving-variables
(let ((yas-tests--ran-exit-hook nil)
(yas-triggers-in-field t))
(yas-with-snippet-dirs
'((".emacs.d/snippets"
("emacs-lisp-mode"
("foo" . "\
# expand-env: ((yas-after-exit-snippet-hook (lambda () (setq yas-tests--ran-exit-hook t))))
# --
FOO ${1:f1} ${2:f2}")
("sub" . "\
# expand-env: ((yas-after-exit-snippet-hook (lambda () (setq yas-tests--ran-exit-hook 'sub))))