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;; Dependencies
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(require 'ert)
(require 'list)

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;; Tests
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(setq xs '(1 2 3 4 5))

(ert-deftest list-length ()
  (should (= 0 (list-length '())))
  (should (= 5 (list-length xs))))

(ert-deftest list-reduce ()
  (should (= 16 (list-reduce 1 (lambda (x acc) (+ x acc)) xs))))

(ert-deftest list-map ()
  (should
   (equal '(2 4 6 8 10)
          (list-map (lambda (x) (* x 2)) xs))))

(ert-deftest list-xs-distinct-by? ()
  (should
   (equal t (list-xs-distinct-by?
             (lambda (x) (plist-get x :kbd))
             '((:kbd "C-a" :name "foo")
               (:kbd "C-b" :name "foo"))))))

(ert-deftest list-dedupe-adjacent ()
  (should (equal '(1 2 3 4 3 5)
                 (list-dedupe-adjacent '(1 1 1 2 2 3 4 4 3 5 5)))))

(ert-deftest list-contains? ()
  ;; Assert returns t or nil
  (should (equal t (list-contains? 1 xs)))
  (should (equal nil (list-contains? 100 xs))))

(ert-deftest list-join ()
  (should (equal "foo-bar-baz"
                 (list-join "-" '("foo" "bar" "baz")))))

(ert-deftest list-chunk ()
  (should (equal '((1 2 3 4 5 6))
                 (list-chunk 7 '(1 2 3 4 5 6))))
  (should (equal '((1) (2) (3) (4) (5) (6))
                 (list-chunk 1 '(1 2 3 4 5 6))))
  (should (equal '((1 2 3) (4 5 6))
                 (list-chunk 3 '(1 2 3 4 5 6))))
  (should (equal '((1 2) (3 4) (5 6))
                 (list-chunk 2 '(1 2 3 4 5 6)))))

(ert-deftest list-find ()
  (should (equal 2 (list-find (lambda (x) (= 2 x)) '(1 2 3 4)))))

(ert-deftest list-all? ()
  (should (equal t (list-all? (lambda (x) (= 2 x)) nil)))
  (should (null (list-all? (lambda (x) (= 2 x)) '(1 2 3))))
  (should (equal t (list-all? (lambda (x) (= 2 x)) '(2 2 2 2)))))

(ert-deftest list-any? ()
  (should (null (list-any? (lambda (x) (= 2 x)) nil)))
  (should (equal t (list-any? (lambda (x) (= 2 x)) '(1 2 3))))
  (should (null (list-any? (lambda (x) (= 4 x)) '(1 2 3)))))

(ert-deftest list-duplicate ()
  (should (equal '() (list-duplicate 0 "hello")))
  (should (equal '("hi") (list-duplicate 1 "hi")))
  (should (equal '("bye" "bye") (list-duplicate 2 "bye")))
  (should (equal '((1 2) (1 2) (1 2)) (list-duplicate 3 '(1 2)))))

(ert-deftest list-first ()
  (should (null (list-first '())))
  (should (equal 1 (list-first '() 1)))
  (should (equal 1 (list-first '(1))))
  (should (equal 1 (list-first '(1) 2)))
  (should (equal 1 (list-first '(1 2 3)))))

(ert-deftest list-last ()
  (should (null (list-last '())))
  (should (equal 1 (list-last '() 1)))
  (should (equal 1 (list-last '(1))))
  (should (equal 1 (list-last '(1) 2)))
  (should (equal 3 (list-last '(1 2 3)))))

(ert-deftest list-wrap ()
  (should (equal '("hello") (list-wrap "hello")))
  (should (equal '(1 2 3) (list-wrap '(1 2 3))))
  (should (equal '() (list-wrap nil))))

(ert-deftest list-delete ()
  (should (equal '(b c) (list-delete 'a '(a b c))))
  (should (equal '(a b c) (list-delete 'd '(a b c))))
  (should (equal '(a b c) (list-delete 'b '(a b b c))))
  (should (equal '() (list-delete 'b '()))))

;; TODO(wpcarro): Supoprt this.
;; (ert-deftest list-zip ()
;;   (should (equal '((1 3 5) (2 4 6)) (list-zip '(1 2) '(3 4) '(5 6))))
;;   (should (equal '((1 3 5)) (list-zip '(1 2) '(3) '(5 6)))))