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Add tests for ring.el
* test/lisp/emacs-lisp/ring-tests.el: New file with tests for ring.el.
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Simen Heggestøyl
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test/lisp/emacs-lisp/ring-tests.el
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test/lisp/emacs-lisp/ring-tests.el
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;;; ring-tests.el --- Tests for ring.el -*- lexical-binding: t; -*-
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;; Copyright (C) 2016 Free Software Foundation, Inc.
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;; Author: Simen Heggestøyl <simenheg@gmail.com>
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;; Keywords:
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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 <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;;
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;;; Code:
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(require 'ert)
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(require 'ring)
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(ert-deftest ring-tests-make-ring-ring-p ()
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(should (ring-p (make-ring 5))))
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(ert-deftest ring-tests-insert-at-beginning ()
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(let ((ring (make-ring 5)))
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(ring-insert-at-beginning ring 'foo)
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(ring-insert-at-beginning ring 'bar)
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(should (equal (ring-elements ring) '(foo bar)))))
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(ert-deftest ring-tests-plus1 ()
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(should (= (ring-plus1 0 5) 1))
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(should (= (ring-plus1 4 5) 0)))
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(ert-deftest ring-tests-minus1 ()
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(should (= (ring-minus1 0 5) 4))
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(should (= (ring-minus1 4 5) 3)))
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(ert-deftest ring-tests-length ()
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(let ((ring (make-ring 2)))
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(should (= (ring-length ring) 0))
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(ring-insert ring 'a)
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(should (= (ring-length ring) 1))
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(ring-insert ring 'b)
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(should (= (ring-length ring) 2))
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(ring-insert ring 'c)
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(should (= (ring-length ring) 2))))
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(ert-deftest ring-tests-index ()
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(should (= (ring-index 0 0 3 3) 2))
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(should (= (ring-index 0 0 3 5) 2))
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(should (= (ring-index 0 2 3 3) 1))
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(should (= (ring-index 1 2 3 3) 0))
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(should (= (ring-index 2 2 3 3) 2)))
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(ert-deftest ring-tests-empty-p ()
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(let ((ring (make-ring 5)))
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(should (ring-empty-p ring))
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(ring-insert ring 1)
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(should-not (ring-empty-p ring))
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(ring-remove ring)
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(should (ring-empty-p ring))))
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(ert-deftest ring-tests-size ()
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(let ((ring (make-ring 2)))
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(should (= (ring-size ring) 2))
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(ring-insert ring "a")
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(ring-insert ring "b")
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(ring-insert ring "c")
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(should (= (ring-size ring) 2))
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(ring-extend ring 3)
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(should (= (ring-size ring) 5))))
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(ert-deftest ring-tests-copy ()
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(let ((ring1 (make-ring 3)))
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(ring-insert ring1 1)
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(ring-insert ring1 2)
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(let ((ring2 (ring-copy ring1)))
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(should-not (eq ring1 ring2))
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(should (= (ring-size ring1) (ring-size ring2)))
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(should (equal (ring-elements ring1) (ring-elements ring2))))))
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(ert-deftest ring-tests-insert ()
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(let ((ring (make-ring 2)))
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(ring-insert ring :a)
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(should (equal (ring-elements ring) '(:a)))
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(ring-insert ring :b)
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(should (equal (ring-elements ring) '(:b :a)))
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(ring-insert ring :c)
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(should (equal (ring-elements ring) '(:c :b)))))
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(ert-deftest ring-tests-remove ()
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(let ((ring (make-ring 2)))
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(should-error (ring-remove ring))
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(ring-insert ring 'foo)
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(ring-insert ring 'bar)
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(should (eq (ring-remove ring) 'foo))
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(should (equal (ring-elements ring) '(bar)))
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(ring-insert ring 'baz)
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(should (eq (ring-remove ring 0) 'baz))
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(should (equal (ring-elements ring) '(bar)))))
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(ert-deftest ring-tests-ref ()
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(let ((ring (make-ring 2)))
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(should-error (ring-ref ring 0))
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(ring-insert ring :a)
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(should (eq (ring-ref ring 0) :a))
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(ring-insert ring :b)
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(should (eq (ring-ref ring 0) :b))
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(should (eq (ring-ref ring 1) :a))
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(should (eq (ring-ref ring 2) :b))))
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(ert-deftest ring-tests-elements ()
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(let ((ring (make-ring 5)))
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(ring-insert ring 3)
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(ring-insert ring 2)
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(ring-insert ring 1)
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(should (equal (ring-elements ring) '(1 2 3)))))
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(ert-deftest ring-tests-member ()
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(let ((ring (make-ring 3)))
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(ring-insert ring "foo")
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(ring-insert ring "bar")
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(should (= (ring-member ring "foo") 1))
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(should (= (ring-member ring "bar") 0))
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(should-not (ring-member ring "baz"))))
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(ert-deftest ring-tests-next ()
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(let ((ring (make-ring 3)))
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(ring-insert ring 'a)
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(ring-insert ring 'b)
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(should (eq (ring-next ring 'b) 'a))
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(should (eq (ring-next ring 'a) 'b))
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(should-error (ring-next ring 'c))))
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(ert-deftest ring-tests-previous ()
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(let ((ring (make-ring 3)))
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(ring-insert ring 'a)
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(ring-insert ring 'b)
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(should (eq (ring-previous ring 'b) 'a))
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(should (eq (ring-previous ring 'a) 'b))
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(should-error (ring-previous ring 'c))))
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(ert-deftest ring-tests-extend ()
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(let ((ring (make-ring 2)))
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(ring-insert ring 1)
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(ring-insert ring 2)
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(should (= (ring-size ring) 2))
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(should (= (ring-length ring) 2))
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(ring-extend ring 3)
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(ring-insert ring 3)
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(should (= (ring-size ring) 5))
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(should (equal (ring-elements ring) '(3 2 1)))))
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(ert-deftest ring-tests-insert ()
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(let ((ring (make-ring 2)))
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(ring-insert+extend ring :a)
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(ring-insert+extend ring :b)
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(should (equal (ring-elements ring) '(:b :a)))
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(ring-insert+extend ring :c)
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(should (equal (ring-elements ring) '(:c :b)))
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(ring-insert+extend ring :d t)
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(should (equal (ring-elements ring) '(:d :c :b)))))
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(ert-deftest ring-tests-remove+insert+extend ()
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(let ((ring (make-ring 3)))
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(ring-insert ring 1)
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(ring-insert ring 1)
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(ring-insert ring 2)
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(ring-remove+insert+extend ring 1)
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(should (equal (ring-elements ring) '(1 2)))
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(ring-remove+insert+extend ring 0)
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(should (equal (ring-elements ring) '(0 1 2)))
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(ring-remove+insert+extend ring 3)
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(should (equal (ring-elements ring) '(3 0 1)))
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(ring-remove+insert+extend ring 4 t)
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(should (equal (ring-elements ring) '(4 3 0 1)))
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(ring-remove+insert+extend ring 1 t)
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(should (equal (ring-elements ring) '(1 4 3 0)))))
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(ert-deftest ring-tests-convert-sequence-to-ring ()
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(let ((ring (ring-convert-sequence-to-ring '(a b c))))
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(should (equal (ring-elements ring) '(a b c))))
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(let ((ring (ring-convert-sequence-to-ring [1 2 3])))
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(should (equal (ring-elements ring) '(1 2 3))))
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(let ((ring (ring-convert-sequence-to-ring "abc")))
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(should (equal (ring-elements ring) '(?a ?b ?c))))
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(let ((ring (make-ring 2)))
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(ring-insert ring :a)
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(ring-insert ring :b)
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(should
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(equal (ring-elements (ring-convert-sequence-to-ring ring))
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(ring-elements ring)))))
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(provide 'ring-tests)
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;;; ring-tests.el ends here
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