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;;; backtrace-tests.el --- Tests for emacs-lisp/backtrace.el -*- lexical-binding: t; -*-
;; Copyright (C) 2018 Free Software Foundation, Inc.
;; Author: Gemini Lasswell
;; 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/>.
;;; Code:
(require 'backtrace)
(require 'ert)
(require 'seq)
;; Create a backtrace frames list with several frames.
;; TODO load this from an el file in backtrace-resources/ so the tests
;; can be byte-compiled.
(defvar backtrace-tests--frames nil)
(defun backtrace-tests--func1 (arg1 arg2)
(setq backtrace-tests--frames (backtrace-get-frames nil))
(list arg1 arg2))
(defun backtrace-tests--func2 (arg)
(list arg))
(defun backtrace-tests--func3 (arg)
(let ((foo (list 'a arg 'b)))
(list foo (backtrace-tests--func2 arg) (backtrace-tests--func1 arg 0))))
(defun backtrace-tests--create-backtrace-frames ()
(backtrace-tests--func3 "string")
;; Discard frames before this one.
(let (this-index)
(dotimes (index (length backtrace-tests--frames))
(when (eq (backtrace-frame-fun (nth index backtrace-tests--frames))
'backtrace-tests--create-backtrace-frames)
(setq this-index index)))
(setq backtrace-tests--frames (seq-subseq backtrace-tests--frames
0 (1+ this-index)))))
(backtrace-tests--create-backtrace-frames)
;; TODO check that debugger-batch-max-lines still works
(defun backtrace-tests--insert-header ()
(insert "Test header\n"))
(defmacro backtrace-tests--with-buffer (&rest body)
`(with-temp-buffer
(backtrace-mode)
(setq backtrace-frames backtrace-tests--frames)
(setq backtrace-insert-header-function #'backtrace-tests--insert-header)
(backtrace-print)
,@body))
;;; Tests
(ert-deftest backtrace-tests--to-string ()
(should (string= (backtrace-to-string backtrace-tests--frames)
" backtrace-get-frames(nil)
(setq backtrace-tests--frames (backtrace-get-frames nil))
backtrace-tests--func1(\"string\" 0)
(list foo (backtrace-tests--func2 arg) (backtrace-tests--func1 arg 0))
(let ((foo (list 'a arg 'b))) (list foo (backtrace-tests--func2 arg) (backtrace-tests--func1 arg 0)))
backtrace-tests--func3(\"string\")
backtrace-tests--create-backtrace-frames()
")))
(provide 'backtrace-tests)
;; These tests expect to see non-byte compiled stack frames.
;; Local Variables:
;; no-byte-compile: t
;; End:
;;; backtrace-tests.el ends here
|
