test/automated/let-alist.el

   1 ;;; let-alist.el --- tests for file handling. -*- lexical-binding: t; -*-
   2
   3 ;; Copyright (C) 2012-2014 Free Software Foundation, Inc.
   4
   5 ;; This file is part of GNU Emacs.
   6
   7 ;; GNU Emacs is free software: you can redistribute it and/or modify
   8 ;; it under the terms of the GNU General Public License as published by
   9 ;; the Free Software Foundation, either version 3 of the License, or
  10 ;; (at your option) any later version.
  11
  12 ;; GNU Emacs is distributed in the hope that it will be useful,
  13 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 ;; GNU General Public License for more details.
  16
  17 ;; You should have received a copy of the GNU General Public License
  18 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  19
  20 ;;; Code:
  21
  22 (require 'ert)
  23 (require 'cl-lib)
  24
  25 (ert-deftest let-alist-surface-test ()
  26   "Tests basic macro expansion for `let-alist'."
  27   (should
  28    (equal '(let ((symbol data))
  29              (let ((.test-one (cdr (assq 'test-one symbol)))
  30                    (.test-two (cdr (assq 'test-two symbol))))
  31                (list .test-one .test-two
  32                      .test-two .test-two)))
  33           (cl-letf (((symbol-function #'gensym) (lambda (x) 'symbol)))
  34             (macroexpand
  35              '(let-alist data (list .test-one .test-two
  36                                     .test-two .test-two))))))
  37   (should
  38    (equal
  39     (let ((.external "ext")
  40           (.external.too "et"))
  41       (let-alist '((test-two . 0)
  42                    (test-three . 1)
  43                    (sublist . ((foo . 2)
  44                                (bar . 3))))
  45         (list .test-one .test-two .test-three
  46               .sublist.foo .sublist.bar
  47               ..external ..external.too)))
  48     (list nil 0 1 2 3 "ext" "et"))))
  49
  50 (defvar let-alist--test-counter 0
  51   "Used to count number of times a function is called.")
  52
  53 (ert-deftest let-alist-evaluate-once ()
  54   "Check that the alist argument is only evaluated once."
  55   (let ((let-alist--test-counter 0))
  56     (should
  57      (equal
  58       (let-alist (list
  59                   (cons 'test-two (cl-incf let-alist--test-counter))
  60                   (cons 'test-three (cl-incf let-alist--test-counter)))
  61         (list .test-one .test-two .test-two .test-three .cl-incf))
  62       '(nil 1 1 2 nil)))))
  63
  64 (ert-deftest let-alist-remove-dot ()
  65   "Remove firt dot from symbol."
  66   (should (equal (let-alist--remove-dot 'hi) 'hi))
  67   (should (equal (let-alist--remove-dot '.hi) 'hi))
  68   (should (equal (let-alist--remove-dot '..hi) '.hi)))
  69
  70 (ert-deftest let-alist-list-to-sexp ()
  71   "Check that multiple dots are handled correctly."
  72   (should (= 1 (eval (let-alist--list-to-sexp '(a b c d) ''((d (c (b (a . 1)))))))))
  73   (should (equal (let-alist--access-sexp '.foo.bar.baz 'var)
  74                  '(cdr (assq 'baz (cdr (assq 'bar (cdr (assq 'foo var))))))))
  75   (should (equal (let-alist--access-sexp '..foo.bar.baz 'var) '.foo.bar.baz)))
  76
  77 ;;; let-alist.el ends here