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feat(wpcarro/emacs): Support default value for al-get

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Similar to Elixir's `Map.get/3`.

Change-Id: I736f7e618aafc786a32eeba46ca635cb27db18b6
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6000
Reviewed-by: wpcarro <wpcarro@gmail.com>
Autosubmit: wpcarro <wpcarro@gmail.com>
Tested-by: BuildkiteCI
This commit is contained in:
William Carroll 2022-07-29 18:12:16 -07:00 • committed by clbot
parent 230c4bbb3e
commit 6b3f4113cc
2 changed files with 18 additions and 3 deletions
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13
users/wpcarro/emacs/pkgs/al/tests.el
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@ -14,6 +14,19 @@
(al-has-key? 'fname '((fname . "William")))
(not (al-has-key? 'lname '((fname . "William"))))))
(ert-deftest al-get ()
(let ((xs (->> (al-new)
(al-set 'fname "John")
(al-set 'employed? nil))))
(and
(string= "John" (al-get 'fname xs))
(string= "Cleese" (al-get 'lname xs "Cleese"))
;; Test that the value of nil is returned even when a default is defined,
;; which could be a subtle bug in the typical Elisp pattern of supporting
;; defaults with: (or foo default).
(eq nil (al-get 'employed? xs))
(eq nil (al-get 'employed? xs "default")))))
(ert-deftest al-has-value? ()
(and
(al-has-value? "William" '((fname . "William")))