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;;; xref-tests.el --- tests for xref -*- lexical-binding:t -*-
;; Copyright (C) 2016-2021 Free Software Foundation, Inc.
;; Author: Dmitry Gutov <dgutov@yandex.ru>
;; 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)
(require 'xref)
(require 'cl-lib)
(defvar xref-tests--data-dir
(expand-file-name "xref-resources/"
(file-name-directory
(or load-file-name buffer-file-name))))
(defun xref-tests--matches-in-data-dir (regexp &optional files)
(xref-matches-in-directory regexp (or files "*") xref-tests--data-dir nil))
(defun xref-tests--locations-in-data-dir (regexp &optional files)
(let ((matches (xref-tests--matches-in-data-dir regexp files)))
;; Sort in order to guarantee an order independent from the
;; filesystem traversal.
(cl-sort (mapcar #'xref-item-location matches)
#'string<
:key #'xref-location-group)))
(ert-deftest xref-matches-in-directory-finds-none-for-some-regexp ()
(should (null (xref-tests--matches-in-data-dir "zzz"))))
(ert-deftest xref-matches-in-directory-finds-some-for-bar ()
(let ((locs (xref-tests--locations-in-data-dir "bar")))
(should (= 2 (length locs)))
(should (string-match-p "file1\\.txt\\'" (xref-location-group (nth 0 locs))))
(should (string-match-p "file2\\.txt\\'" (xref-location-group (nth 1 locs))))))
(ert-deftest xref-matches-in-directory-finds-two-matches-on-the-same-line ()
(let ((locs (xref-tests--locations-in-data-dir "foo")))
(should (= 2 (length locs)))
(should (string-match-p "file1\\.txt\\'" (xref-location-group (nth 0 locs))))
(should (string-match-p "file1\\.txt\\'" (xref-location-group (nth 1 locs))))
(should (equal 1 (xref-location-line (nth 0 locs))))
(should (equal 1 (xref-location-line (nth 1 locs))))
(should (equal 0 (xref-location-column (nth 0 locs))))
(should (equal 4 (xref-location-column (nth 1 locs))))))
(ert-deftest xref-matches-in-directory-finds-an-empty-line-regexp-match ()
(let ((locs (xref-tests--locations-in-data-dir "^$")))
(should (= 1 (length locs)))
(should (string-match-p "file2\\.txt\\'" (xref-location-group (nth 0 locs))))
(should (equal 1 (xref-location-line (nth 0 locs))))
(should (equal 0 (xref-location-column (nth 0 locs))))))
(ert-deftest xref--buf-pairs-iterator-groups-markers-by-buffers-1 ()
(let* ((xrefs (xref-tests--matches-in-data-dir "foo"))
(iter (xref--buf-pairs-iterator xrefs))
(cons (funcall iter :next)))
(should (null (funcall iter :next)))
(should (string-match "file1\\.txt\\'" (buffer-file-name (car cons))))
(should (= 2 (length (cdr cons))))))
(ert-deftest xref--buf-pairs-iterator-groups-markers-by-buffers-2 ()
(let* ((xrefs (xref-tests--matches-in-data-dir "bar"))
(iter (xref--buf-pairs-iterator xrefs))
(cons1 (funcall iter :next))
(cons2 (funcall iter :next)))
(should (null (funcall iter :next)))
(should-not (equal (car cons1) (car cons2)))
(should (= 1 (length (cdr cons1))))
(should (= 1 (length (cdr cons2))))))
(ert-deftest xref--buf-pairs-iterator-cleans-up-markers ()
(let* ((xrefs (xref-tests--matches-in-data-dir "bar"))
(iter (xref--buf-pairs-iterator xrefs))
(cons1 (funcall iter :next))
(cons2 (funcall iter :next)))
(funcall iter :cleanup)
(should (null (marker-position (car (nth 0 (cdr cons1))))))
(should (null (marker-position (cdr (nth 0 (cdr cons1))))))
(should (null (marker-position (car (nth 0 (cdr cons2))))))
(should (null (marker-position (cdr (nth 0 (cdr cons2))))))))
(ert-deftest xref--xref-file-name-display-is-abs ()
(let ((xref-file-name-display 'abs))
(should (equal (delete-dups
(mapcar 'xref-location-group
(xref-tests--locations-in-data-dir "\\(bar\\|foo\\)")))
(list
(concat xref-tests--data-dir "file1.txt")
(concat xref-tests--data-dir "file2.txt"))))))
(ert-deftest xref--xref-file-name-display-is-nondirectory ()
(let ((xref-file-name-display 'nondirectory))
(should (equal (delete-dups
(mapcar 'xref-location-group
(xref-tests--locations-in-data-dir "\\(bar\\|foo\\)")))
(list
"file1.txt"
"file2.txt")))))
(ert-deftest xref--xref-file-name-display-is-relative-to-project-root ()
(let* ((data-parent-dir
(file-name-directory (directory-file-name xref-tests--data-dir)))
(project-find-functions
#'(lambda (_) (cons 'transient data-parent-dir)))
(xref-file-name-display 'project-relative))
(should (equal (delete-dups
(mapcar 'xref-location-group
(xref-tests--locations-in-data-dir "\\(bar\\|foo\\)")))
(list
"xref-resources/file1.txt"
"xref-resources/file2.txt")))))
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