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;;; test-gptel-tools-write-text-file.el --- Tests for write_text_file gptel tool -*- lexical-binding: t; -*-
;;; Commentary:
;; Tests for `cj/write-text-file--run' and its helpers.
;;; Code:
(require 'ert)
(require 'cl-lib)
(eval-and-compile
(add-to-list 'load-path (expand-file-name "tests" user-emacs-directory))
(add-to-list 'load-path (expand-file-name "gptel-tools" user-emacs-directory))
(setq load-prefer-newer t)
(unless (featurep 'gptel)
(defvar gptel-tools nil)
(defun gptel-make-tool (&rest _args) nil)
(defun gptel-get-tool (&rest _args) nil)
(provide 'gptel)))
(require 'write_text_file)
;; ------------------------------------------------------- helpers
(defun test-gptel-tools-write-text-file--in-home (suffix fn)
"Run FN with a fresh path under HOME using SUFFIX. Clean up after."
(let* ((name (format ".test-gptel-tools-write-text-file-%s-%s.tmp"
suffix (format-time-string "%s%N")))
(path (expand-file-name name "~")))
(unwind-protect
(funcall fn path)
(when (file-exists-p path) (delete-file path))
(dolist (b (file-expand-wildcards (concat path "-*.bak")))
(when (file-exists-p b) (delete-file b))))))
;; --------------------------------------------- validate-path
(ert-deftest test-gptel-tools-write-text-file-validate-path-normal ()
"Normal: returns the expanded path for a HOME-relative input."
(let ((result (cj/write-text-file--validate-path "foo.txt")))
(should (string-prefix-p (expand-file-name "~") result))
(should (string-suffix-p "/foo.txt" result))))
(ert-deftest test-gptel-tools-write-text-file-validate-path-error-outside-home ()
"Error: a path outside HOME signals."
(should-error (cj/write-text-file--validate-path "/etc/hostname")))
;; --------------------------------------------- backup-name
(ert-deftest test-gptel-tools-write-text-file-backup-name-shape ()
"Backup names append a YYYY-MM-DD-HHMMSS suffix and .bak."
(let ((name (cj/write-text-file--backup-name "/home/user/foo.txt")))
(should (string-prefix-p "/home/user/foo.txt-" name))
(should (string-suffix-p ".bak" name))
(should (string-match-p "-[0-9]\\{4\\}-[0-9]\\{2\\}-[0-9]\\{2\\}-[0-9]\\{6\\}\\.bak\\'"
name))))
;; --------------------------------------------- ensure-parent
(ert-deftest test-gptel-tools-write-text-file-ensure-parent-creates-missing ()
"Normal: creates missing parent directories."
(let* ((base (make-temp-file "test-gptel-tools-write-text-file-" t))
(deep (expand-file-name "a/b/c/file.txt" base)))
(unwind-protect
(progn
(cj/write-text-file--ensure-parent deep)
(should (file-directory-p (file-name-directory deep))))
(delete-directory base t))))
(ert-deftest test-gptel-tools-write-text-file-ensure-parent-error-unwritable ()
"Error: an unwritable parent signals."
(let* ((parent (make-temp-file "test-gptel-tools-write-text-file-ro-" t))
(target (expand-file-name "child.txt" parent)))
(unwind-protect
(progn
(set-file-modes parent #o500)
(should-error (cj/write-text-file--ensure-parent target)))
(set-file-modes parent #o700)
(delete-directory parent t))))
;; --------------------------------------------- run
(ert-deftest test-gptel-tools-write-text-file-run-normal ()
"Normal: writes new content and returns a status string."
(test-gptel-tools-write-text-file--in-home
"new"
(lambda (path)
(let ((result (cj/write-text-file--run
(file-name-nondirectory path) "hello\n" nil)))
(should (string-match-p "Successfully wrote" result))
(with-temp-buffer
(insert-file-contents path)
(should (equal (buffer-string) "hello\n")))))))
(ert-deftest test-gptel-tools-write-text-file-run-error-existing-no-overwrite ()
"Error: existing file without overwrite signals."
(test-gptel-tools-write-text-file--in-home
"existing"
(lambda (path)
(with-temp-file path (insert "old content\n"))
(should-error (cj/write-text-file--run
(file-name-nondirectory path) "new content\n" nil))
;; File preserved
(with-temp-buffer
(insert-file-contents path)
(should (equal (buffer-string) "old content\n"))))))
(ert-deftest test-gptel-tools-write-text-file-run-overwrite-creates-backup ()
"Overwrite path makes a timestamped backup before writing."
(test-gptel-tools-write-text-file--in-home
"overwrite"
(lambda (path)
(with-temp-file path (insert "old content\n"))
(cj/write-text-file--run
(file-name-nondirectory path) "new content\n" t)
;; New content landed
(with-temp-buffer
(insert-file-contents path)
(should (equal (buffer-string) "new content\n")))
;; Backup exists with old content
(let ((backups (file-expand-wildcards (concat path "-*.bak"))))
(should (= 1 (length backups)))
(with-temp-buffer
(insert-file-contents (car backups))
(should (equal (buffer-string) "old content\n")))))))
(ert-deftest test-gptel-tools-write-text-file-run-boundary-empty-content ()
"Boundary: nil content writes an empty file."
(test-gptel-tools-write-text-file--in-home
"empty"
(lambda (path)
(cj/write-text-file--run (file-name-nondirectory path) nil nil)
(should (file-exists-p path))
(should (= 0 (file-attribute-size (file-attributes path)))))))
(ert-deftest test-gptel-tools-write-text-file-run-error-outside-home ()
"Error: a path outside HOME signals."
(should-error (cj/write-text-file--run "/etc/test-write.txt" "x" nil)))
(provide 'test-gptel-tools-write-text-file)
;;; test-gptel-tools-write-text-file.el ends here
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