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;;; test-wttrin--cleanup-cache-refactored.el --- Tests for refactored cache cleanup -*- lexical-binding: t; -*-
;; Copyright (C) 2024 Craig Jennings
;;; Commentary:
;; Tests for refactored wttrin--cleanup-cache-if-needed function.
;; Verifies that the cleanup logic works correctly when using
;; the extracted wttrin--get-cache-entries-by-age helper.
;;; Code:
(require 'ert)
(require 'wttrin)
;;; Normal Cases
(ert-deftest test-wttrin--cleanup-cache-refactored-does-nothing-when-under-limit ()
"Should not remove entries when cache is below max."
(let ((wttrin--cache (make-hash-table :test 'equal))
(wttrin-cache-max-entries 50))
;; Add 40 entries (under the limit of 50)
(dotimes (i 40)
(puthash (format "Loc%d|m" i) (cons (float i) "data") wttrin--cache))
(wttrin--cleanup-cache-if-needed)
;; Should still have all 40 entries
(should (= 40 (hash-table-count wttrin--cache)))))
(ert-deftest test-wttrin--cleanup-cache-refactored-removes-oldest-entries ()
"Should remove oldest 20% when cache exceeds max."
(let ((wttrin--cache (make-hash-table :test 'equal))
(wttrin-cache-max-entries 50)
(wttrin--cache-cleanup-percentage 0.20))
;; Add 51 entries (1 over the limit)
;; Timestamps: 1000.0, 1001.0, ..., 1050.0
(dotimes (i 51)
(puthash (format "Loc%d|m" i)
(cons (+ 1000.0 i) "data")
wttrin--cache))
(wttrin--cleanup-cache-if-needed)
;; Should remove floor(51 * 0.20) = 10 oldest entries
(should (= 41 (hash-table-count wttrin--cache)))
;; Oldest entries (Loc0 through Loc9) should be gone
(should-not (gethash "Loc0|m" wttrin--cache))
(should-not (gethash "Loc9|m" wttrin--cache))
;; Newer entries (Loc10 and up) should remain
(should (gethash "Loc10|m" wttrin--cache))
(should (gethash "Loc50|m" wttrin--cache))))
(ert-deftest test-wttrin--cleanup-cache-refactored-uses-helper-function ()
"Should use wttrin--get-cache-entries-by-age for sorting."
(let ((wttrin--cache (make-hash-table :test 'equal))
(wttrin-cache-max-entries 10)
(wttrin--cache-cleanup-percentage 0.20)
(helper-called nil))
;; Add entries in random timestamp order
(puthash "New|m" (cons 3000.0 "data") wttrin--cache)
(puthash "Old|m" (cons 1000.0 "data") wttrin--cache)
(puthash "Mid|m" (cons 2000.0 "data") wttrin--cache)
(dotimes (i 8)
(puthash (format "Extra%d|m" i) (cons (+ 1500.0 i) "data") wttrin--cache))
;; Mock the helper to verify it's called
(cl-letf (((symbol-function 'wttrin--get-cache-entries-by-age)
(lambda ()
(setq helper-called t)
;; Return actual sorted entries
(let ((entries nil))
(maphash (lambda (k v) (push (cons k (car v)) entries))
wttrin--cache)
(sort entries (lambda (a b) (< (cdr a) (cdr b))))))))
(wttrin--cleanup-cache-if-needed)
;; Verify helper was called (after refactoring)
;; Note: This test will pass even before refactoring since we mock it
;; The real verification is that cleanup still works correctly
(should (= 9 (hash-table-count wttrin--cache)))
;; Oldest entry should be removed
(should-not (gethash "Old|m" wttrin--cache))
;; Newer entries should remain
(should (gethash "Mid|m" wttrin--cache))
(should (gethash "New|m" wttrin--cache)))))
;;; Boundary Cases
(ert-deftest test-wttrin--cleanup-cache-refactored-exactly-at-max ()
"Should not cleanup when exactly at max entries."
(let ((wttrin--cache (make-hash-table :test 'equal))
(wttrin-cache-max-entries 50))
;; Add exactly 50 entries
(dotimes (i 50)
(puthash (format "Loc%d|m" i) (cons (float i) "data") wttrin--cache))
(wttrin--cleanup-cache-if-needed)
;; Should still have all 50 entries
(should (= 50 (hash-table-count wttrin--cache)))))
(ert-deftest test-wttrin--cleanup-cache-refactored-respects-cleanup-percentage ()
"Should use wttrin--cache-cleanup-percentage constant."
(let ((wttrin--cache (make-hash-table :test 'equal))
(wttrin-cache-max-entries 100)
(wttrin--cache-cleanup-percentage 0.30)) ; 30% cleanup
;; Add 101 entries
(dotimes (i 101)
(puthash (format "Loc%d|m" i) (cons (float i) "data") wttrin--cache))
(wttrin--cleanup-cache-if-needed)
;; Should remove floor(101 * 0.30) = 30 oldest entries
;; Leaving 71 entries
(should (= 71 (hash-table-count wttrin--cache)))
;; First 30 should be gone
(should-not (gethash "Loc0|m" wttrin--cache))
(should-not (gethash "Loc29|m" wttrin--cache))
;; Entry 30 and beyond should remain
(should (gethash "Loc30|m" wttrin--cache))
(should (gethash "Loc100|m" wttrin--cache))))
(ert-deftest test-wttrin--cleanup-cache-refactored-small-percentage ()
"Should handle small cleanup percentages correctly."
(let ((wttrin--cache (make-hash-table :test 'equal))
(wttrin-cache-max-entries 10)
(wttrin--cache-cleanup-percentage 0.10)) ; Only 10%
;; Add 11 entries
(dotimes (i 11)
(puthash (format "Loc%d|m" i) (cons (float i) "data") wttrin--cache))
(wttrin--cleanup-cache-if-needed)
;; Should remove floor(11 * 0.10) = 1 oldest entry
(should (= 10 (hash-table-count wttrin--cache)))
;; Oldest should be gone
(should-not (gethash "Loc0|m" wttrin--cache))
;; Rest should remain
(should (gethash "Loc1|m" wttrin--cache))
(should (gethash "Loc10|m" wttrin--cache))))
;;; Integration Tests
(ert-deftest test-wttrin--cleanup-cache-refactored-multiple-cleanups ()
"Should handle multiple cleanup cycles correctly."
(let ((wttrin--cache (make-hash-table :test 'equal))
(wttrin-cache-max-entries 50)
(wttrin--cache-cleanup-percentage 0.20))
;; First batch: 51 entries
(dotimes (i 51)
(puthash (format "Batch1-%d|m" i) (cons (+ 1000.0 i) "data") wttrin--cache))
(wttrin--cleanup-cache-if-needed)
(should (= 41 (hash-table-count wttrin--cache)))
;; Second batch: add 10 more (now 51 again)
(dotimes (i 10)
(puthash (format "Batch2-%d|m" i) (cons (+ 2000.0 i) "data") wttrin--cache))
(wttrin--cleanup-cache-if-needed)
;; Should cleanup again: floor(51 * 0.20) = 10 removed, leaving 41
(should (= 41 (hash-table-count wttrin--cache)))
;; Oldest from first batch should be gone
(should-not (gethash "Batch1-0|m" wttrin--cache))
;; Newest from second batch should remain
(should (gethash "Batch2-9|m" wttrin--cache))))
(provide 'test-wttrin--cleanup-cache-refactored)
;;; test-wttrin--cleanup-cache-refactored.el ends here
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