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emacs/test/lisp/subr-tests.el

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;;; subr-tests.el --- Tests for subr.el -*- lexical-binding:t -*-
;; Copyright (C) 2015-2020 Free Software Foundation, Inc.
;; Author: Oleh Krehel <ohwoeowho@gmail.com>,
;; Nicolas Petton <nicolas@petton.fr>
;; Keywords:
;; This file is part of GNU Emacs.
;; GNU Emacs 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.
;; GNU Emacs 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 GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
;;; Commentary:
;;
;;; Code:
(require 'ert)
(eval-when-compile (require 'cl-lib))
(ert-deftest let-when-compile ()
;; good case
(should (equal (macroexpand '(let-when-compile ((foo (+ 2 3)))
(setq bar (eval-when-compile (+ foo foo)))
(setq boo (eval-when-compile (* foo foo)))))
'(progn
(setq bar (quote 10))
(setq boo (quote 25)))))
;; bad case: `eval-when-compile' omitted, byte compiler should catch this
(should (equal (macroexpand
'(let-when-compile ((foo (+ 2 3)))
(setq bar (+ foo foo))
(setq boo (eval-when-compile (* foo foo)))))
'(progn
(setq bar (+ foo foo))
(setq boo (quote 25)))))
;; something practical
(should (equal (macroexpand
'(let-when-compile ((keywords '("true" "false")))
(font-lock-add-keywords
'c++-mode
`((,(eval-when-compile
(format "\\<%s\\>" (regexp-opt keywords)))
0 font-lock-keyword-face)))))
'(font-lock-add-keywords
(quote c++-mode)
(list
(cons (quote
"\\<\\(?:\\(?:fals\\|tru\\)e\\)\\>")
(quote
(0 font-lock-keyword-face))))))))
(defalias 'subr-tests--parent-mode
(if (fboundp 'prog-mode) 'prog-mode 'fundamental-mode))
(ert-deftest provided-mode-derived-p ()
;; base case: `derived-mode' directly derives `prog-mode'
(should (progn
(define-derived-mode derived-mode prog-mode "test")
(provided-mode-derived-p 'derived-mode 'prog-mode)))
;; edge case: `derived-mode' derives an alias of `prog-mode'
(should (progn
(define-derived-mode derived-mode subr-tests--parent-mode "test")
(provided-mode-derived-p 'derived-mode 'prog-mode))))
(ert-deftest number-sequence-test ()
(should (= (length
(number-sequence (1- most-positive-fixnum) most-positive-fixnum))
2))
(should (= (length
(number-sequence
(1+ most-negative-fixnum) most-negative-fixnum -1))
2)))
(ert-deftest string-comparison-test ()
(should (string-lessp "abc" "acb"))
(should (string-lessp "aBc" "abc"))
(should (string-lessp "abc" "abcd"))
(should (string-lessp "abc" "abcd"))
(should-not (string-lessp "abc" "abc"))
(should-not (string-lessp "" ""))
(should (string-greaterp "acb" "abc"))
(should (string-greaterp "abc" "aBc"))
(should (string-greaterp "abcd" "abc"))
(should (string-greaterp "abcd" "abc"))
(should-not (string-greaterp "abc" "abc"))
(should-not (string-greaterp "" ""))
;; Symbols are also accepted
(should (string-lessp 'abc 'acb))
(should (string-lessp "abc" 'acb))
(should (string-greaterp 'acb 'abc))
(should (string-greaterp "acb" 'abc)))
(ert-deftest subr-test-when ()
(should (equal (when t 1) 1))
(should (equal (when t 2) 2))
(should (equal (when nil 1) nil))
(should (equal (when nil 2) nil))
(should (equal (when t 'x 1) 1))
(should (equal (when t 'x 2) 2))
(should (equal (when nil 'x 1) nil))
(should (equal (when nil 'x 2) nil))
(let ((x 1))
(should-not (when nil
(setq x (1+ x))
x))
(should (= x 1))
(should (= 2 (when t
(setq x (1+ x))
x)))
(should (= x 2)))
(should (equal (macroexpand-all '(when a b c d))
'(if a (progn b c d)))))
(ert-deftest subr-test-xor ()
"Test `xor'."
(should-not (xor nil nil))
(should (eq (xor nil 'true) 'true))
(should (eq (xor 'true nil) 'true))
(should-not (xor t t)))
(ert-deftest subr-test-version-parsing ()
(should (equal (version-to-list ".5") '(0 5)))
(should (equal (version-to-list "0.9 alpha1") '(0 9 -3 1)))
(should (equal (version-to-list "0.9 snapshot") '(0 9 -4)))
(should (equal (version-to-list "0.9-alpha1") '(0 9 -3 1)))
(should (equal (version-to-list "0.9-snapshot") '(0 9 -4)))
(should (equal (version-to-list "0.9.snapshot") '(0 9 -4)))
(should (equal (version-to-list "0.9_snapshot") '(0 9 -4)))
(should (equal (version-to-list "0.9alpha1") '(0 9 -3 1)))
(should (equal (version-to-list "0.9snapshot") '(0 9 -4)))
(should (equal (version-to-list "1.0 git") '(1 0 -4)))
(should (equal (version-to-list "1.0 pre2") '(1 0 -1 2)))
(should (equal (version-to-list "1.0-git") '(1 0 -4)))
(should (equal (version-to-list "1.0-pre2") '(1 0 -1 2)))
(should (equal (version-to-list "1.0.1-a") '(1 0 1 1)))
(should (equal (version-to-list "1.0.1-f") '(1 0 1 6)))
(should (equal (version-to-list "1.0.1.a") '(1 0 1 1)))
(should (equal (version-to-list "1.0.1.f") '(1 0 1 6)))
(should (equal (version-to-list "1.0.1_a") '(1 0 1 1)))
(should (equal (version-to-list "1.0.1_f") '(1 0 1 6)))
(should (equal (version-to-list "1.0.1a") '(1 0 1 1)))
(should (equal (version-to-list "1.0.1f") '(1 0 1 6)))
(should (equal (version-to-list "1.0.7.5") '(1 0 7 5)))
(should (equal (version-to-list "1.0.git") '(1 0 -4)))
(should (equal (version-to-list "1.0.pre2") '(1 0 -1 2)))
(should (equal (version-to-list "1.0_git") '(1 0 -4)))
(should (equal (version-to-list "1.0_pre2") '(1 0 -1 2)))
(should (equal (version-to-list "1.0git") '(1 0 -4)))
(should (equal (version-to-list "1.0pre2") '(1 0 -1 2)))
(should (equal (version-to-list "22.8 beta3") '(22 8 -2 3)))
(should (equal (version-to-list "22.8-beta3") '(22 8 -2 3)))
(should (equal (version-to-list "22.8.beta3") '(22 8 -2 3)))
(should (equal (version-to-list "22.8_beta3") '(22 8 -2 3)))
(should (equal (version-to-list "22.8beta3") '(22 8 -2 3)))
(should (equal (version-to-list "6.9.30 Beta") '(6 9 30 -2)))
(should (equal (version-to-list "6.9.30-Beta") '(6 9 30 -2)))
(should (equal (version-to-list "6.9.30.Beta") '(6 9 30 -2)))
(should (equal (version-to-list "6.9.30Beta") '(6 9 30 -2)))
(should (equal (version-to-list "6.9.30_Beta") '(6 9 30 -2)))
(let ((text-quoting-style 'grave))
(should (equal
(error-message-string (should-error (version-to-list "OTP-18.1.5")))
"Invalid version syntax: `OTP-18.1.5' (must start with a number)"))
(should (equal
(error-message-string (should-error (version-to-list "")))
"Invalid version syntax: `' (must start with a number)"))
(should (equal
(error-message-string (should-error (version-to-list "1.0..7.5")))
"Invalid version syntax: `1.0..7.5'"))
(should (equal
(error-message-string (should-error (version-to-list "1.0prepre2")))
"Invalid version syntax: `1.0prepre2'"))
(should (equal
(error-message-string (should-error (version-to-list "22.8X3")))
"Invalid version syntax: `22.8X3'"))
(should (equal
(error-message-string (should-error (version-to-list "beta22.8alpha3")))
"Invalid version syntax: `beta22.8alpha3' (must start with a number)"))
(should (equal
(error-message-string (should-error (version-to-list "honk")))
"Invalid version syntax: `honk' (must start with a number)")))
(should (equal
(error-message-string (should-error (version-to-list 9)))
"Version must be a string"))
(let ((version-separator "_"))
(should (equal (version-to-list "_5") '(0 5)))
(should (equal (version-to-list "0_9 alpha1") '(0 9 -3 1)))
(should (equal (version-to-list "0_9 snapshot") '(0 9 -4)))
(should (equal (version-to-list "0_9-alpha1") '(0 9 -3 1)))
(should (equal (version-to-list "0_9-snapshot") '(0 9 -4)))
(should (equal (version-to-list "0_9.alpha1") '(0 9 -3 1)))
(should (equal (version-to-list "0_9.snapshot") '(0 9 -4)))
(should (equal (version-to-list "0_9alpha1") '(0 9 -3 1)))
(should (equal (version-to-list "0_9snapshot") '(0 9 -4)))
(should (equal (version-to-list "1_0 git") '(1 0 -4)))
(should (equal (version-to-list "1_0 pre2") '(1 0 -1 2)))
(should (equal (version-to-list "1_0-git") '(1 0 -4)))
(should (equal (version-to-list "1_0.pre2") '(1 0 -1 2)))
(should (equal (version-to-list "1_0_1-a") '(1 0 1 1)))
(should (equal (version-to-list "1_0_1-f") '(1 0 1 6)))
(should (equal (version-to-list "1_0_1.a") '(1 0 1 1)))
(should (equal (version-to-list "1_0_1.f") '(1 0 1 6)))
(should (equal (version-to-list "1_0_1_a") '(1 0 1 1)))
(should (equal (version-to-list "1_0_1_f") '(1 0 1 6)))
(should (equal (version-to-list "1_0_1a") '(1 0 1 1)))
(should (equal (version-to-list "1_0_1f") '(1 0 1 6)))
(should (equal (version-to-list "1_0_7_5") '(1 0 7 5)))
(should (equal (version-to-list "1_0_git") '(1 0 -4)))
(should (equal (version-to-list "1_0pre2") '(1 0 -1 2)))
(should (equal (version-to-list "22_8 beta3") '(22 8 -2 3)))
(should (equal (version-to-list "22_8-beta3") '(22 8 -2 3)))
(should (equal (version-to-list "22_8.beta3") '(22 8 -2 3)))
(should (equal (version-to-list "22_8beta3") '(22 8 -2 3)))
(should (equal (version-to-list "6_9_30 Beta") '(6 9 30 -2)))
(should (equal (version-to-list "6_9_30-Beta") '(6 9 30 -2)))
(should (equal (version-to-list "6_9_30.Beta") '(6 9 30 -2)))
(should (equal (version-to-list "6_9_30Beta") '(6 9 30 -2)))
(let ((text-quoting-style 'grave))
(should (equal
(error-message-string (should-error (version-to-list "1_0__7_5")))
"Invalid version syntax: `1_0__7_5'"))
(should (equal
(error-message-string (should-error (version-to-list "1_0prepre2")))
"Invalid version syntax: `1_0prepre2'"))
(should (equal
(error-message-string (should-error (version-to-list "22.8X3")))
"Invalid version syntax: `22.8X3'"))
(should (equal
(error-message-string (should-error (version-to-list "beta22_8alpha3")))
"Invalid version syntax: `beta22_8alpha3' (must start with a number)")))))
(ert-deftest subr-test-version-list-< ()
(should (version-list-< '(0) '(1)))
(should (version-list-< '(0 9) '(1 0)))
(should (version-list-< '(1 -1) '(1 0)))
(should (version-list-< '(1 -2) '(1 -1)))
(should (not (version-list-< '(1) '(0))))
(should (not (version-list-< '(1 1) '(1 0))))
(should (not (version-list-< '(1) '(1 0))))
(should (not (version-list-< '(1 0) '(1 0 0)))))
(ert-deftest subr-test-version-list-= ()
(should (version-list-= '(1) '(1)))
(should (version-list-= '(1 0) '(1)))
(should (not (version-list-= '(0) '(1)))))
(ert-deftest subr-test-version-list-<= ()
(should (version-list-<= '(0) '(1)))
(should (version-list-<= '(1) '(1)))
(should (version-list-<= '(1 0) '(1)))
(should (not (version-list-<= '(1) '(0)))))
(defun subr-test--backtrace-frames-with-backtrace-frame (base)
"Reference implementation of `backtrace-frames'."
(let ((idx 0)
(frame nil)
(frames nil))
(while (setq frame (backtrace-frame idx base))
(push frame frames)
(setq idx (1+ idx)))
(nreverse frames)))
(defun subr-test--frames-2 (base)
(let ((_dummy nil))
(progn ;; Add a few frames to top of stack
(unwind-protect
(cons (mapcar (pcase-lambda (`(,evald ,func ,args ,_))
`(,evald ,func ,@args))
(backtrace-frames base))
(subr-test--backtrace-frames-with-backtrace-frame base))))))
(defun subr-test--frames-1 (base)
(subr-test--frames-2 base))
(ert-deftest subr-test-backtrace-simple-tests ()
"Test backtrace-related functions (simple tests).
This exercises `backtrace-frame', and indirectly `mapbacktrace'."
;; `mapbacktrace' returns nil
(should (equal (mapbacktrace #'ignore) nil))
;; Unbound BASE is silently ignored
(let ((unbound (make-symbol "ub")))
(should (equal (backtrace-frame 0 unbound) nil))
(should (equal (mapbacktrace #'error unbound) nil)))
;; First frame is backtrace-related function
(should (equal (backtrace-frame 0) '(t backtrace-frame 0)))
(let ((throw-args (lambda (&rest args) (throw 'ret args))))
(should (equal (catch 'ret (mapbacktrace throw-args))
`(t mapbacktrace (,throw-args) nil))))
;; Past-end NFRAMES is silently ignored
(should (equal (backtrace-frame most-positive-fixnum) nil)))
(ert-deftest subr-test-backtrace-integration-test ()
"Test backtrace-related functions (integration test).
This exercises `backtrace-frame', `backtrace-frames', and
indirectly `mapbacktrace'."
;; Compare two implementations of backtrace-frames
(let ((frame-lists (subr-test--frames-1 'subr-test--frames-2)))
(should (equal (car frame-lists) (cdr frame-lists)))))
(ert-deftest subr-tests--string-match-p--blank ()
"Test that [:blank:] matches horizontal whitespace, cf. Bug#25366."
(should (equal (string-match-p "\\`[[:blank:]]\\'" " ") 0))
(should (equal (string-match-p "\\`[[:blank:]]\\'" "\t") 0))
(should-not (string-match-p "\\`[[:blank:]]\\'" "\n"))
(should-not (string-match-p "\\`[[:blank:]]\\'" "a"))
(should (equal (string-match-p "\\`[[:blank:]]\\'" "\N{HAIR SPACE}") 0))
(should (equal (string-match-p "\\`[[:blank:]]\\'" "\u3000") 0))
(should-not (string-match-p "\\`[[:blank:]]\\'" "\N{LINE SEPARATOR}")))
(ert-deftest subr-tests--dolist--wrong-number-of-args ()
"Test that `dolist' doesn't accept wrong types or length of SPEC,
cf. Bug#25477."
(should-error (eval '(dolist (a)))
:type 'wrong-number-of-arguments)
(should-error (eval '(dolist (a () 'result 'invalid)) t)
:type 'wrong-number-of-arguments)
(should-error (eval '(dolist "foo") t)
:type 'wrong-type-argument))
(ert-deftest subr-tests-bug22027 ()
"Test for https://debbugs.gnu.org/22027 ."
(let ((default "foo") res)
(cl-letf (((symbol-function 'read-string)
(lambda (_prompt _init _hist def) def)))
(setq res (read-passwd "pass: " 'confirm (mapconcat #'string default "")))
(should (string= default res)))))
(ert-deftest subr-tests--gensym ()
"Test `gensym' behavior."
(should (equal (symbol-name (let ((gensym-counter 0)) (gensym)))
"g0"))
(should (eq (string-to-char (symbol-name (gensym))) ?g))
(should (eq (string-to-char (symbol-name (gensym "X"))) ?X)))
(ert-deftest subr-tests--assq-delete-all ()
"Test `assq-delete-all' behavior."
(cl-flet ((new-list-fn
()
(list (cons 'a 1) (cons 'b 2) (cons 'c 3) 'd (cons "foo" "bar"))))
(should (equal (cdr (new-list-fn)) (assq-delete-all 'a (new-list-fn))))
(should (equal (new-list-fn) (assq-delete-all 'd (new-list-fn))))
(should (equal (new-list-fn) (assq-delete-all "foo" (new-list-fn))))))
(ert-deftest subr-tests--assoc-delete-all ()
"Test `assoc-delete-all' behavior."
(cl-flet ((new-list-fn
()
(list (cons 'a 1) (cons 'b 2) (cons 'c 3) 'd (cons "foo" "bar"))))
(should (equal (cdr (new-list-fn)) (assoc-delete-all 'a (new-list-fn))))
(should (equal (new-list-fn) (assoc-delete-all 'd (new-list-fn))))
(should (equal (butlast (new-list-fn))
(assoc-delete-all "foo" (new-list-fn))))))
(ert-deftest shell-quote-argument-%-on-w32 ()
"Quoting of `%' in w32 shells isn't perfect.
See https://debbugs.gnu.org/cgi/bugreport.cgi?bug=19350."
:expected-result :failed
(skip-unless (and (fboundp 'w32-shell-dos-semantics)
(w32-shell-dos-semantics)))
(let ((process-environment (append '("ca^=with-caret"
"ca=without-caret")
process-environment)))
;; It actually results in
;; without-caret with-caret
(should (equal (shell-command-to-string
(format "echo %s %s"
"%ca%"
(shell-quote-argument "%ca%")))
"without-caret %ca%"))))
(ert-deftest subr-tests-flatten-tree ()
"Test `flatten-tree' behavior."
(should (equal (flatten-tree '(1 (2 . 3) nil (4 5 (6)) 7))
'(1 2 3 4 5 6 7)))
(should (equal (flatten-tree '((1 . 2)))
'(1 2)))
(should (equal (flatten-tree '(1 nil 2))
'(1 2)))
(should (equal (flatten-tree 42)
'(42)))
(should (equal (flatten-tree t)
'(t)))
(should (equal (flatten-tree nil)
nil))
(should (equal (flatten-tree '((nil) ((((nil)))) nil))
nil))
(should (equal (flatten-tree '(1 ("foo" "bar") 2))
'(1 "foo" "bar" 2))))
(defvar subr-tests--hook nil)
(ert-deftest subr-tests-add-hook-depth ()
"Test the `depth' arg of `add-hook'."
(setq-default subr-tests--hook nil)
(add-hook 'subr-tests--hook 'f1)
(add-hook 'subr-tests--hook 'f2)
(should (equal subr-tests--hook '(f2 f1)))
(add-hook 'subr-tests--hook 'f3 t)
(should (equal subr-tests--hook '(f2 f1 f3)))
(add-hook 'subr-tests--hook 'f4 50)
(should (equal subr-tests--hook '(f2 f1 f4 f3)))
(add-hook 'subr-tests--hook 'f5 -50)
(should (equal subr-tests--hook '(f5 f2 f1 f4 f3)))
(add-hook 'subr-tests--hook 'f6)
(should (equal subr-tests--hook '(f5 f6 f2 f1 f4 f3)))
;; Make sure `t' is equivalent to 90.
(add-hook 'subr-tests--hook 'f7 90)
(add-hook 'subr-tests--hook 'f8 t)
(should (equal subr-tests--hook '(f5 f6 f2 f1 f4 f3 f7 f8)))
;; Make sue `nil' is equivalent to 0.
(add-hook 'subr-tests--hook 'f9 0)
(add-hook 'subr-tests--hook 'f10)
(should (equal subr-tests--hook '(f5 f10 f9 f6 f2 f1 f4 f3 f7 f8)))
)
(ert-deftest ignore-error-tests ()
(should (equal (ignore-error (end-of-file)
(read ""))
nil))
(should (equal (ignore-error end-of-file
(read ""))
nil))
(should-error (ignore-error foo
(read ""))))
(ert-deftest string-replace ()
(should (equal (string-replace "foo" "bar" "zot")
"zot"))
(should (equal (string-replace "foo" "bar" "foozot")
"barzot"))
(should (equal (string-replace "foo" "bar" "barfoozot")
"barbarzot"))
(should (equal (string-replace "zot" "bar" "barfoozot")
"barfoobar"))
(should (equal (string-replace "z" "bar" "barfoozot")
"barfoobarot"))
(should (equal (string-replace "zot" "bar" "zat")
"zat"))
(should (equal (string-replace "azot" "bar" "zat")
"zat"))
(should (equal (string-replace "azot" "bar" "azot")
"bar"))
(should (equal (string-replace "azot" "bar" "foozotbar")
"foozotbar"))
(should (equal (string-replace "fo" "bar" "lafofofozot")
"labarbarbarzot"))
(should (equal (string-replace "\377" "x" "a\377b")
"axb"))
(should (equal (string-replace "\377" "x" "a\377ø")
"axø"))
(should (equal (string-replace (string-to-multibyte "\377") "x" "a\377b")
"axb"))
(should (equal (string-replace (string-to-multibyte "\377") "x" "a\377ø")
"axø"))
(should (equal (string-replace "ana" "ANA" "ananas") "ANAnas"))
(should (equal (string-replace "a" "" "") ""))
(should (equal (string-replace "a" "" "aaaaa") ""))
(should (equal (string-replace "ab" "" "ababab") ""))
(should (equal (string-replace "ab" "" "abcabcabc") "ccc"))
(should (equal (string-replace "a" "aa" "aaa") "aaaaaa"))
(should (equal (string-replace "abc" "defg" "abc") "defg"))
(should-error (string-replace "" "x" "abc")))
(provide 'subr-tests)
;;; subr-tests.el ends here
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