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* test/lisp/dnd-tests.el: New file. (dnd-tests-begin-text-drag): (dnd-tests-begin-file-drag): (dnd-tests-begin-drag-files): New tests.
198 lines
8.6 KiB
EmacsLisp
198 lines
8.6 KiB
EmacsLisp
;;; dnd-tests.el --- Tests for window system independent DND support -*- lexical-binding: t; -*-
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;; Copyright (C) 2022 Free Software Foundation, Inc.
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;; Tests for stuff in dnd.el that doesn't require a window system.
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;; At present, these tests only checks the behavior of the simplified
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;; drag APIs in dnd.el. Actual drags are not performed.
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;;; Code:
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(require 'dnd)
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(require 'cl-lib)
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(require 'tramp)
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;; This code was taken from tramp-tests.el: perhaps some of it isn't
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;; strictly necessary.
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(defconst dnd-tests-temporary-file-directory
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(cond
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((getenv "REMOTE_TEMPORARY_FILE_DIRECTORY"))
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((eq system-type 'windows-nt) null-device)
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(t (add-to-list
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'tramp-methods
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'("mock"
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(tramp-login-program "sh")
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(tramp-login-args (("-i")))
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(tramp-remote-shell "/bin/sh")
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(tramp-remote-shell-args ("-c"))
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(tramp-connection-timeout 10)))
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(add-to-list
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'tramp-default-host-alist
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`("\\`mock\\'" nil ,(system-name)))
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;; Emacs's Makefile sets $HOME to a nonexistent value. Needed
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;; in batch mode only, therefore.
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(unless (and (null noninteractive) (file-directory-p "~/"))
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(setenv "HOME" temporary-file-directory))
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(format "/mock::%s" temporary-file-directory)))
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"Temporary directory for drag-and-drop tests involving remote files.")
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;; Substitute for x-begin-drag, which isn't present on all systems.
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(defalias 'x-begin-drag
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(lambda (_targets &optional action frame &rest _)
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;; Verify that frame is either nil or a valid frame.
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(when (and frame (not (frame-live-p frame)))
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(signal 'wrong-type-argument frame))
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;; Verify that the action is valid and pretend the drag succeeded
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;; (by returning the action).
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(cl-ecase action
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('XdndActionCopy action)
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('XdndActionMove action)
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('XdndActionLink action)
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;; These two are not technically valid, but x-begin-drag accepts
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;; them anyway.
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('XdndActionPrivate action)
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('XdndActionAsk 'XdndActionPrivate))))
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;; This doesn't work during tests.
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(defalias 'gui-set-selection
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(lambda (&rest _)))
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(defun dnd-tests-remote-accessible-p ()
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"Return if a test involving remote files can proceed."
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(ignore-errors
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(and
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(file-remote-p dnd-tests-temporary-file-directory)
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(file-directory-p dnd-tests-temporary-file-directory)
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(file-writable-p dnd-tests-temporary-file-directory))))
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(defun dnd-tests-make-temp-name ()
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"Return a temporary remote file name for test.
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The temporary file is not created."
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(expand-file-name (make-temp-name "dnd-test-remote")
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dnd-tests-temporary-file-directory))
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(ert-deftest dnd-tests-begin-text-drag ()
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(should (eq (dnd-begin-text-drag "some test text that will be dragged")
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'copy))
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(should (eq (dnd-begin-text-drag "some test text that will be dragged"
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nil 'move)
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'move)))
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(ert-deftest dnd-tests-begin-file-drag ()
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;; These tests also involve handling remote file names.
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(skip-unless (dnd-tests-remote-accessible-p))
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(let ((normal-temp-file (expand-file-name (make-temp-name "dnd-test")
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temporary-file-directory))
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(remote-temp-file (dnd-tests-make-temp-name)))
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;; Touch those files if they don't exist.
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(unless (file-exists-p normal-temp-file)
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(write-region "" 0 normal-temp-file))
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(unless (file-exists-p remote-temp-file)
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(write-region "" 0 remote-temp-file))
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(unwind-protect
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(progn
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;; Now test dragging a normal file.
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(should (eq (dnd-begin-file-drag normal-temp-file) 'copy))
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;; And the remote file.
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(should (eq (dnd-begin-file-drag remote-temp-file) 'copy))
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;; Test that the remote file was added to the list of files
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;; to remove later.
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(should dnd-last-dragged-remote-file)
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;; Test that the remote file was removed.
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(should (progn
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(dnd-begin-file-drag normal-temp-file)
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(not dnd-last-dragged-remote-file)))
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;; Test that links to remote files can't be created.
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(should-error (dnd-begin-file-drag remote-temp-file nil 'link)))
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(delete-file normal-temp-file)
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(delete-file remote-temp-file))))
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(ert-deftest dnd-tests-begin-drag-files ()
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(skip-unless (dnd-tests-remote-accessible-p))
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(let ((normal-temp-file (expand-file-name (make-temp-name "dnd-test")
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temporary-file-directory))
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(normal-temp-file-1 (expand-file-name (make-temp-name "dnd-test")
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temporary-file-directory))
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(remote-temp-file (dnd-tests-make-temp-name))
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(nonexistent-local-file
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(expand-file-name (make-temp-name "dnd-test")
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temporary-file-directory))
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(nonexistent-remote-file (dnd-tests-make-temp-name))
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(nonexistent-remote-file-1 (dnd-tests-make-temp-name)))
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;; Touch those files if they don't exist.
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(unless (file-exists-p normal-temp-file)
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(write-region "" 0 normal-temp-file))
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(unless (file-exists-p normal-temp-file-1)
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(write-region "" 0 normal-temp-file))
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(unless (file-exists-p remote-temp-file)
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(write-region "" 0 remote-temp-file))
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(ignore-errors
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(delete-file nonexistent-local-file)
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(delete-file nonexistent-remote-file)
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(delete-file nonexistent-remote-file-1))
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(unwind-protect
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(progn
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;; Now test dragging a normal file and a remote file.
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(should (eq (dnd-begin-drag-files (list normal-temp-file
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remote-temp-file))
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'copy))
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;; Test that the remote file produced was added to the list
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;; of files to remove upon the next call.
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(should dnd-last-dragged-remote-file)
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;; Two remote files at the same time.
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(should (eq (dnd-begin-drag-files (list normal-temp-file
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normal-temp-file-1))
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'copy))
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;; Test that the remote files were removed.
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(should-not dnd-last-dragged-remote-file)
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;; Multiple local files with some remote files that will
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;; fail, and some that won't.
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(should (and (eq (dnd-begin-drag-files (list normal-temp-file
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remote-temp-file
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remote-temp-file
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nonexistent-remote-file
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normal-temp-file-1
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nonexistent-remote-file-1))
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'copy)
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;; Make sure exactly two valid remote files
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;; were downloaded.
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(eq (length dnd-last-dragged-remote-file) 2)))
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;; Make sure links can't be created to remote files.
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(should-error (dnd-begin-drag-files (list normal-temp-file
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remote-temp-file
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normal-temp-file-1)
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nil 'link))
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;; And that they can to normal files.
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(should (eq (dnd-begin-drag-files (list normal-temp-file
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normal-temp-file-1)
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nil 'link)
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'link))
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;; Make sure you can't drag an empty list of files.
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(should-error (dnd-begin-drag-files nil))
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;; And when all remote files are inaccessible.
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(should-error (dnd-begin-drag-files (list nonexistent-remote-file
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nonexistent-remote-file-1))))
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(delete-file normal-temp-file)
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(delete-file normal-temp-file-1)
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(delete-file remote-temp-file))))
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(provide 'dnd-tests)
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;;; dnd-tests.el ends here
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