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;;; let-alist.el --- tests for file handling. -*- lexical-binding: t; -*-
;; Copyright (C) 2012-2021 Free Software Foundation, Inc.
;; 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 'ert)
(require 'cl-lib)
(require 'let-alist)
(ert-deftest let-alist-surface-test ()
"Tests basic macro expansion for `let-alist'."
(should
(equal '(let ((symbol data))
(let ((.test-one (cdr (assq 'test-one symbol)))
(.test-two (cdr (assq 'test-two symbol))))
(list .test-one .test-two
.test-two .test-two)))
(cl-letf (((symbol-function #'make-symbol) (lambda (_x) 'symbol)))
(macroexpand
'(let-alist data (list .test-one .test-two
.test-two .test-two))))))
(should
(equal
(let ((.external "ext")
(.external.too "et"))
(let-alist '((test-two . 0)
(test-three . 1)
(sublist . ((foo . 2)
(bar . 3))))
(list .test-one .test-two .test-three
.sublist.foo .sublist.bar
..external ..external.too)))
(list nil 0 1 2 3 "ext" "et"))))
(ert-deftest let-alist-cons ()
(should
(equal
(let ((.external "ext"))
(let-alist '((test-two . 0)
(test-three . 1)
(sublist . ((foo . 2)
(bar . 3))))
(list `(, .test-one . , .test-two)
.sublist.bar ..external)))
(list '(nil . 0) 3 "ext"))))
(defvar let-alist--test-counter 0
"Used to count number of times a function is called.")
(ert-deftest let-alist-evaluate-once ()
"Check that the alist argument is only evaluated once."
(let ((let-alist--test-counter 0))
(should
(equal
(let-alist (list
(cons 'test-two (cl-incf let-alist--test-counter))
(cons 'test-three (cl-incf let-alist--test-counter)))
(list .test-one .test-two .test-two .test-three .cl-incf))
'(nil 1 1 2 nil)))))
(ert-deftest let-alist-remove-dot ()
"Remove first dot from symbol."
(should (equal (let-alist--remove-dot 'hi) 'hi))
(should (equal (let-alist--remove-dot '.hi) 'hi))
(should (equal (let-alist--remove-dot '..hi) '.hi)))
(ert-deftest let-alist-list-to-sexp ()
"Check that multiple dots are handled correctly."
(should (= 1 (eval (let-alist--list-to-sexp '(a b c d) ''((d (c (b (a . 1)))))) t)))
(should (equal (let-alist--access-sexp '.foo.bar.baz 'var)
'(cdr (assq 'baz (cdr (assq 'bar (cdr (assq 'foo var))))))))
(should (equal (let-alist--access-sexp '..foo.bar.baz 'var) '.foo.bar.baz)))
(ert-deftest let-alist--deep-dot-search--nested ()
"Check that nested `let-alist' forms don't generate spurious bindings.
See Bug#24641."
(should (equal (let-alist--deep-dot-search '(foo .bar (baz .qux)))
'((.bar . bar) (.qux . qux))))
(should (equal (let-alist--deep-dot-search '(foo .bar (let-alist .qux .baz)))
'((.bar . bar) (.qux . qux))))) ; no .baz
(ert-deftest let-alist--vectors ()
(should (equal (let-alist '((a . 1) (b . 2))
`[,(+ .a) ,(+ .a .b .b)])
[1 5])))
;;; let-alist-tests.el ends here
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