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Add an ERT explainer for 'time-equal-p'.

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* lisp/emacs-lisp/ert.el (ert--explain-time-equal-p): New explainer
function.

* test/lisp/emacs-lisp/ert-tests.el (ert-test-explain-time-equal-p): New
test.
This commit is contained in:
Philipp Stephani 2025-03-25 00:12:20 +01:00
parent cf6d0b48d8
commit 8be7e98557
2 changed files with 21 additions and 0 deletions
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13
lisp/emacs-lisp/ert.el
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@ -669,6 +669,19 @@ Return nil if they are."
(put 'equal-including-properties 'ert-explainer
'ert--explain-equal-including-properties)
(defun ert--explain-time-equal-p (a b)
"Explainer function for `time-equal-p'.
A and B are the time values to compare."
(declare (ftype (function (t t) list))
(side-effect-free t))
(unless (time-equal-p a b)
`(different-time-values
,(format-time-string "%F %T.%N %Z" a t)
,(format-time-string "%F %T.%N %Z" b t)
difference
,(format-time-string "%s.%N" (time-subtract a b) t))))
(function-put #'time-equal-p 'ert-explainer #'ert--explain-time-equal-p)
;;; Implementation of `ert-info'.
;; TODO(ohler): The name `info' clashes with