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;;; test-wttrin-clear-cache.el --- Tests for wttrin-clear-cache -*- lexical-binding: t; -*-
;; Copyright (C) 2025-2026 Craig Jennings
;;; Commentary:
;; Unit tests for wttrin-clear-cache function.
;; Tests the interactive command that clears all cached weather data.
;;; Code:
(require 'ert)
(require 'wttrin)
(require 'testutil-wttrin)
;;; Setup and Teardown
(defun test-wttrin-clear-cache-setup ()
"Setup for clear-cache tests."
(testutil-wttrin-setup))
(defun test-wttrin-clear-cache-teardown ()
"Teardown for clear-cache tests."
(testutil-wttrin-teardown))
;;; Normal Cases
(ert-deftest test-wttrin-clear-cache-normal-empties-all-entries ()
"Clearing the cache should remove all stored weather entries."
(test-wttrin-clear-cache-setup)
(unwind-protect
(progn
;; Populate cache with several entries
(testutil-wttrin-add-to-cache "Paris" "data1")
(testutil-wttrin-add-to-cache "London" "data2")
(testutil-wttrin-add-to-cache "Tokyo" "data3")
(should (= 3 (testutil-wttrin-cache-size)))
(wttrin-clear-cache)
(should (= 0 (testutil-wttrin-cache-size))))
(test-wttrin-clear-cache-teardown)))
(ert-deftest test-wttrin-clear-cache-normal-shows-confirmation ()
"User should be told the cache was cleared."
(test-wttrin-clear-cache-setup)
(unwind-protect
(let ((displayed-message nil))
(cl-letf (((symbol-function 'message)
(lambda (fmt &rest args)
(setq displayed-message (apply #'format fmt args)))))
(wttrin-clear-cache)
(should displayed-message)
(should (string-match-p "cache cleared" displayed-message))))
(test-wttrin-clear-cache-teardown)))
;;; Boundary Cases
(ert-deftest test-wttrin-clear-cache-boundary-already-empty ()
"Clearing an already empty cache should not error."
(test-wttrin-clear-cache-setup)
(unwind-protect
(progn
(should (= 0 (testutil-wttrin-cache-size)))
;; Should not error
(wttrin-clear-cache)
(should (= 0 (testutil-wttrin-cache-size))))
(test-wttrin-clear-cache-teardown)))
(provide 'test-wttrin-clear-cache)
;;; test-wttrin-clear-cache.el ends here
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