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local ffi = require('ffi')
-- Test LRU interface
local function test_lru()
local capacity = 1024
local lru = kres.lru(capacity)
local dict = {
"catagmatic", "prevaricator", "statoscope", "workhand", "benzamide",
"alluvia", "fanciful", "bladish", "Tarsius", "unfast", "appropriative",
"seraphically", "monkeypod", "deflectometer", "tanglesome", "zodiacal",
"physiologically", "economizer", "forcepslike", "betrumpet",
"Danization", "broadthroat", "randir", "usherette", "nephropyosis",
"hematocyanin", "chrysohermidin", "uncave", "mirksome", "podophyllum",
"siphonognathous", "indoor", "featheriness", "forwardation",
"archruler", "soricoid", "Dailamite", "carmoisin", "controllability",
"unpragmatical", "childless", "transumpt", "productive",
"thyreotoxicosis", "oversorrow", "disshadow", "osse", "roar",
"pantomnesia", "talcer", "hydrorrhoea", "Satyridae", "undetesting",
"smoothbored", "widower", "sivathere", "pendle", "saltation",
"autopelagic", "campfight", "unexplained", "Macrorhamphosus",
"absconsa", "counterflory", "interdependent", "triact", "reconcentration",
"oversharpness", "sarcoenchondroma", "superstimulate", "assessory",
"pseudepiscopacy", "telescopically", "ventriloque", "politicaster",
"Caesalpiniaceae", "inopportunity", "Helion", "uncompatible",
"cephaloclasia", "oversearch", "Mahayanistic", "quarterspace",
"bacillogenic", "hamartite", "polytheistical", "unescapableness",
"Pterophorus", "cradlemaking", "Hippoboscidae", "overindustrialize",
"perishless", "cupidity", "semilichen", "gadge", "detrimental",
"misencourage", "toparchia", "lurchingly", "apocatastasis"
}
-- Check that key insertion works
local inserted = 0
for i, word in ipairs(dict) do
if lru:set(word, i) then
if lru:get(word) == i then
inserted = inserted + 1
end
end
end
is(inserted, #dict, 'all inserted keys can be retrieved')
-- Check that using binary data as keys works
local badinserts = 0
for i, word in ipairs(dict) do
local word_len = #word
word = ffi.cast('char *', word)
if lru:set(word, i, word_len) then
if lru:get(word, word_len) ~= i then
badinserts = badinserts + 1
end
end
end
is(badinserts, 0, 'insertion works for binary keys')
-- Sanity check that non-existent keys cannot be retrieved
local missing = "not in lru"
is(lru:get(missing, #missing, false), nil, 'key that wasnt inserted cannot be retrieved')
-- Test whether key eviction works and LRU is able to insert past the capacity
badinserts = 0
for i = 0, capacity do
local word = dict[1] .. tostring(i)
if lru:set(word, i) then
if lru:get(word) ~= i then
badinserts = badinserts + 1
end
end
end
is(badinserts, 0, 'insertion works for more keys than LRU capacity')
-- Delete and GC
lru = nil -- luacheck: ignore 311
collectgarbage()
collectgarbage()
end
return {
test_lru,
}
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