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;;; Test GNU Emacs modules.
;; Copyright 2015-2017 Free Software Foundation, Inc.
;; 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 <http://www.gnu.org/licenses/>. */
(require 'ert)
(defconst mod-test-emacs
(expand-file-name invocation-name invocation-directory)
"File name of the Emacs binary currently running.")
(eval-and-compile
(defconst mod-test-file
(substitute-in-file-name
"$EMACS_TEST_DIRECTORY/data/emacs-module/mod-test")
"File name of the module test file."))
(require 'mod-test mod-test-file)
;;
;; Basic tests.
;;
(ert-deftest mod-test-sum-test ()
(should (= (mod-test-sum 1 2) 3))
(let ((descr (should-error (mod-test-sum 1 2 3))))
(should (eq (car descr) 'wrong-number-of-arguments))
(should (module-function-p (nth 1 descr)))
(should (eq 0
(string-match
(concat "#<module function "
"\\(at \\(0x\\)?[0-9a-fA-F]+\\( from .*\\)?"
"\\|Fmod_test_sum from .*\\)>")
(prin1-to-string (nth 1 descr)))))
(should (= (nth 2 descr) 3)))
(should-error (mod-test-sum "1" 2) :type 'wrong-type-argument)
(should-error (mod-test-sum 1 "2") :type 'wrong-type-argument)
;; The following tests are for 32-bit build --with-wide-int.
(should (= (mod-test-sum -1 most-positive-fixnum)
(1- most-positive-fixnum)))
(should (= (mod-test-sum 1 most-negative-fixnum)
(1+ most-negative-fixnum)))
(when (< #x1fffffff most-positive-fixnum)
(should (= (mod-test-sum 1 #x1fffffff)
(1+ #x1fffffff)))
(should (= (mod-test-sum -1 #x20000000)
#x1fffffff)))
(should-error (mod-test-sum 1 most-positive-fixnum)
:type 'overflow-error)
(should-error (mod-test-sum -1 most-negative-fixnum)
:type 'overflow-error))
(ert-deftest mod-test-sum-docstring ()
(should (string= (documentation 'mod-test-sum) "Return A + B\n\n(fn a b)")))
(ert-deftest module-function-object ()
"Extract and test the implementation of a module function.
This test needs to be changed whenever the implementation
changes."
(let ((func (symbol-function #'mod-test-sum)))
(should (module-function-p func))
(should (equal (type-of func) 'module-function))
(should (string-match-p
(rx bos "#<module function "
(or "Fmod_test_sum"
(and "at 0x" (+ hex-digit)))
(? " from " (* nonl) "mod-test" (* nonl) )
">" eos)
(prin1-to-string func)))))
;;
;; Non-local exists (throw, signal).
;;
(ert-deftest mod-test-non-local-exit-signal-test ()
(should-error (mod-test-signal))
(let (debugger-args backtrace)
(should-error
(let ((debugger (lambda (&rest args)
(setq debugger-args args
backtrace (with-output-to-string (backtrace)))
(cl-incf num-nonmacro-input-events)))
(debug-on-signal t))
(mod-test-signal)))
(should (equal debugger-args '(error (error . 56))))
(should (string-match-p
(rx bol " mod-test-signal()" eol)
backtrace))))
(ert-deftest mod-test-non-local-exit-throw-test ()
(should (equal
(catch 'tag
(mod-test-throw)
(ert-fail "expected throw"))
65)))
(ert-deftest mod-test-non-local-exit-funcall-normal ()
(should (equal (mod-test-non-local-exit-funcall (lambda () 23))
23)))
(ert-deftest mod-test-non-local-exit-funcall-signal ()
(should (equal (mod-test-non-local-exit-funcall
(lambda () (signal 'error '(32))))
'(signal error (32)))))
(ert-deftest mod-test-non-local-exit-funcall-throw ()
(should (equal (mod-test-non-local-exit-funcall (lambda () (throw 'tag 32)))
'(throw tag 32))))
;;
;; String tests.
;;
(defun multiply-string (s n)
(let ((res ""))
(dotimes (i n res)
(setq res (concat res s)))))
(ert-deftest mod-test-globref-make-test ()
(let ((mod-str (mod-test-globref-make))
(ref-str (multiply-string "abcdefghijklmnopqrstuvwxyz" 100)))
(garbage-collect) ;; XXX: not enough to really test but it's something..
(should (string= ref-str mod-str))))
(ert-deftest mod-test-string-a-to-b-test ()
(should (string= (mod-test-string-a-to-b "aaa") "bbb")))
;;
;; User-pointer tests.
;;
(ert-deftest mod-test-userptr-fun-test ()
(let* ((n 42)
(v (mod-test-userptr-make n))
(r (mod-test-userptr-get v)))
(should (eq (type-of v) 'user-ptr))
(should (integerp r))
(should (= r n))))
;; TODO: try to test finalizer
;;
;; Vector tests.
;;
(ert-deftest mod-test-vector-test ()
(dolist (s '(2 10 100 1000))
(dolist (e '(42 foo "foo"))
(let* ((v-ref (make-vector 2 e))
(eq-ref (eq (aref v-ref 0) (aref v-ref 1)))
(v-test (make-vector s nil)))
(should (eq (mod-test-vector-fill v-test e) t))
(should (eq (mod-test-vector-eq v-test e) eq-ref))))))
(ert-deftest module--func-arity ()
(should (equal (func-arity #'mod-test-return-t) '(1 . 1)))
(should (equal (func-arity #'mod-test-sum) '(2 . 2))))
(ert-deftest module--help-function-arglist ()
(should (equal (help-function-arglist #'mod-test-return-t :preserve-names)
'(arg1)))
(should (equal (help-function-arglist #'mod-test-return-t)
'(arg1)))
(should (equal (help-function-arglist #'mod-test-sum :preserve-names)
'(a b)))
(should (equal (help-function-arglist #'mod-test-sum)
'(arg1 arg2))))
(defmacro module--with-temp-directory (name &rest body)
"Bind NAME to the name of a temporary directory and evaluate BODY.
NAME must be a symbol. Delete the temporary directory after BODY
exits normally or non-locally. NAME will be bound to the
directory name (not the directory file name) of the temporary
directory."
(declare (indent 1))
(cl-check-type name symbol)
`(let ((,name (file-name-as-directory
(make-temp-file "emacs-module-test" :directory))))
(unwind-protect
(progn ,@body)
(delete-directory ,name :recursive))))
(defmacro module--test-assertion (pattern &rest body)
"Test that PATTERN matches the assertion triggered by BODY.
Run Emacs as a subprocess, load the test module `mod-test-file',
and evaluate BODY. Verify that Emacs aborts and prints a module
assertion message that matches PATTERN. PATTERN is evaluated and
must evaluate to a regular expression string."
(declare (indent 1))
;; To contain any core dumps.
`(module--with-temp-directory tempdir
(with-temp-buffer
(let* ((default-directory tempdir)
(status (call-process mod-test-emacs nil t nil
"-batch" "-Q" "-module-assertions"
"-eval" "(setq w32-disable-abort-dialog t)"
"-eval"
,(prin1-to-string
`(progn
(require 'mod-test ,mod-test-file)
,@body)))))
;; Aborting doesn't raise a signal on MS-DOS/Windows, but
;; rather exits with a non-zero status: 2 on MS-DOS (see
;; msdos.c:msdos_abort), 3 on Windows, per MSDN documentation
;; of 'abort'.
(if (memq system-type '(ms-dos windows-nt))
(should (>= status 2))
(should (stringp status))
;; eg "Aborted" or "Abort trap: 6"
(should (string-prefix-p "Abort" status)))
(search-backward "Emacs module assertion: ")
(goto-char (match-end 0))
(should (string-match-p ,pattern
(buffer-substring-no-properties
(point) (point-max))))))))
(ert-deftest module--test-assertions--load-non-live-object ()
"Check that -module-assertions verify that non-live objects
aren’t accessed."
(skip-unless (file-executable-p mod-test-emacs))
;; This doesn’t yet cause undefined behavior.
(should (eq (mod-test-invalid-store) 123))
(module--test-assertion (rx "Emacs value not found in "
(+ digit) " values of "
(+ digit) " environments\n")
;; Storing and reloading a local value causes undefined behavior,
;; which should be detected by the module assertions.
(mod-test-invalid-store)
(mod-test-invalid-load)))
(ert-deftest module--test-assertions--call-emacs-from-gc ()
"Check that -module-assertions prevents calling Emacs functions
during garbage collection."
(skip-unless (file-executable-p mod-test-emacs))
(module--test-assertion
(rx "Module function called during garbage collection\n")
(mod-test-invalid-finalizer)))
;;; emacs-module-tests.el ends here
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