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shrine-medco/shrine-webclient/src/main/html/node_modules/lru-cache/test/basic.js
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basic.js
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var test = require("tap").test
, LRU = require("../")
test("basic", function (t) {
var cache = new LRU({max: 10})
cache.set("key", "value")
t.equal(cache.get("key"), "value")
t.equal(cache.get("nada"), undefined)
t.equal(cache.length, 1)
t.equal(cache.max, 10)
t.end()
})
test("least recently set", function (t) {
var cache = new LRU(2)
cache.set("a", "A")
cache.set("b", "B")
cache.set("c", "C")
t.equal(cache.get("c"), "C")
t.equal(cache.get("b"), "B")
t.equal(cache.get("a"), undefined)
t.end()
})
test("lru recently gotten", function (t) {
var cache = new LRU(2)
cache.set("a", "A")
cache.set("b", "B")
cache.get("a")
cache.set("c", "C")
t.equal(cache.get("c"), "C")
t.equal(cache.get("b"), undefined)
t.equal(cache.get("a"), "A")
t.end()
})
test("del", function (t) {
var cache = new LRU(2)
cache.set("a", "A")
cache.del("a")
t.equal(cache.get("a"), undefined)
t.end()
})
test("max", function (t) {
var cache = new LRU(3)
// test changing the max, verify that the LRU items get dropped.
cache.max = 100
for (var i = 0; i < 100; i ++) cache.set(i, i)
t.equal(cache.length, 100)
for (var i = 0; i < 100; i ++) {
t.equal(cache.get(i), i)
}
cache.max = 3
t.equal(cache.length, 3)
for (var i = 0; i < 97; i ++) {
t.equal(cache.get(i), undefined)
}
for (var i = 98; i < 100; i ++) {
t.equal(cache.get(i), i)
}
// now remove the max restriction, and try again.
cache.max = "hello"
for (var i = 0; i < 100; i ++) cache.set(i, i)
t.equal(cache.length, 100)
for (var i = 0; i < 100; i ++) {
t.equal(cache.get(i), i)
}
// should trigger an immediate resize
cache.max = 3
t.equal(cache.length, 3)
for (var i = 0; i < 97; i ++) {
t.equal(cache.get(i), undefined)
}
for (var i = 98; i < 100; i ++) {
t.equal(cache.get(i), i)
}
t.end()
})
test("reset", function (t) {
var cache = new LRU(10)
cache.set("a", "A")
cache.set("b", "B")
cache.reset()
t.equal(cache.length, 0)
t.equal(cache.max, 10)
t.equal(cache.get("a"), undefined)
t.equal(cache.get("b"), undefined)
t.end()
})
test("basic with weighed length", function (t) {
var cache = new LRU({
max: 100,
length: function (item) { return item.size }
})
cache.set("key", {val: "value", size: 50})
t.equal(cache.get("key").val, "value")
t.equal(cache.get("nada"), undefined)
t.equal(cache.lengthCalculator(cache.get("key")), 50)
t.equal(cache.length, 50)
t.equal(cache.max, 100)
t.end()
})
test("weighed length item too large", function (t) {
var cache = new LRU({
max: 10,
length: function (item) { return item.size }
})
t.equal(cache.max, 10)
// should fall out immediately
cache.set("key", {val: "value", size: 50})
t.equal(cache.length, 0)
t.equal(cache.get("key"), undefined)
t.end()
})
test("least recently set with weighed length", function (t) {
var cache = new LRU({
max:8,
length: function (item) { return item.length }
})
cache.set("a", "A")
cache.set("b", "BB")
cache.set("c", "CCC")
cache.set("d", "DDDD")
t.equal(cache.get("d"), "DDDD")
t.equal(cache.get("c"), "CCC")
t.equal(cache.get("b"), undefined)
t.equal(cache.get("a"), undefined)
t.end()
})
test("lru recently gotten with weighed length", function (t) {
var cache = new LRU({
max: 8,
length: function (item) { return item.length }
})
cache.set("a", "A")
cache.set("b", "BB")
cache.set("c", "CCC")
cache.get("a")
cache.get("b")
cache.set("d", "DDDD")
t.equal(cache.get("c"), undefined)
t.equal(cache.get("d"), "DDDD")
t.equal(cache.get("b"), "BB")
t.equal(cache.get("a"), "A")
t.end()
})
test("lru recently updated with weighed length", function (t) {
var cache = new LRU({
max: 8,
length: function (item) { return item.length }
})
cache.set("a", "A")
cache.set("b", "BB")
cache.set("c", "CCC")
t.equal(cache.length, 6) //CCC BB A
cache.set("a", "+A")
t.equal(cache.length, 7) //+A CCC BB
cache.set("b", "++BB")
t.equal(cache.length, 6) //++BB +A
t.equal(cache.get("c"), undefined)
cache.set("c", "oversized")
t.equal(cache.length, 6) //++BB +A
t.equal(cache.get("c"), undefined)
cache.set("a", "oversized")
t.equal(cache.length, 4) //++BB
t.equal(cache.get("a"), undefined)
t.equal(cache.get("b"), "++BB")
t.end()
})
test("set returns proper booleans", function(t) {
var cache = new LRU({
max: 5,
length: function (item) { return item.length }
})
t.equal(cache.set("a", "A"), true)
// should return false for max exceeded
t.equal(cache.set("b", "donuts"), false)
t.equal(cache.set("b", "B"), true)
t.equal(cache.set("c", "CCCC"), true)
t.end()
})
test("drop the old items", function(t) {
var cache = new LRU({
max: 5,
maxAge: 50
})
cache.set("a", "A")
setTimeout(function () {
cache.set("b", "b")
t.equal(cache.get("a"), "A")
}, 25)
setTimeout(function () {
cache.set("c", "C")
// timed out
t.notOk(cache.get("a"))
}, 60 + 25)
setTimeout(function () {
t.notOk(cache.get("b"))
t.equal(cache.get("c"), "C")
}, 90)
setTimeout(function () {
t.notOk(cache.get("c"))
t.end()
}, 155)
})
test("individual item can have it's own maxAge", function(t) {
var cache = new LRU({
max: 5,
maxAge: 50
})
cache.set("a", "A", 20)
setTimeout(function () {
t.notOk(cache.get("a"))
t.end()
}, 25)
})
test("individual item can have it's own maxAge > cache's", function(t) {
var cache = new LRU({
max: 5,
maxAge: 20
})
cache.set("a", "A", 50)
setTimeout(function () {
t.equal(cache.get("a"), "A")
t.end()
}, 25)
})
test("disposal function", function(t) {
var disposed = false
var cache = new LRU({
max: 1,
dispose: function (k, n) {
disposed = n
}
})
cache.set(1, 1)
cache.set(2, 2)
t.equal(disposed, 1)
cache.set(3, 3)
t.equal(disposed, 2)
cache.reset()
t.equal(disposed, 3)
t.end()
})
test("disposal function on too big of item", function(t) {
var disposed = false
var cache = new LRU({
max: 1,
length: function (k) {
return k.length
},
dispose: function (k, n) {
disposed = n
}
})
var obj = [ 1, 2 ]
t.equal(disposed, false)
cache.set("obj", obj)
t.equal(disposed, obj)
t.end()
})
test("has()", function(t) {
var cache = new LRU({
max: 1,
maxAge: 10
})
cache.set('foo', 'bar')
t.equal(cache.has('foo'), true)
cache.set('blu', 'baz')
t.equal(cache.has('foo'), false)
t.equal(cache.has('blu'), true)
setTimeout(function() {
t.equal(cache.has('blu'), false)
t.end()
}, 15)
})
test("stale", function(t) {
var cache = new LRU({
maxAge: 10,
stale: true
})
cache.set('foo', 'bar')
t.equal(cache.get('foo'), 'bar')
t.equal(cache.has('foo'), true)
setTimeout(function() {
t.equal(cache.has('foo'), false)
t.equal(cache.get('foo'), 'bar')
t.equal(cache.get('foo'), undefined)
t.end()
}, 15)
})
test("lru update via set", function(t) {
var cache = LRU({ max: 2 });
cache.set('foo', 1);
cache.set('bar', 2);
cache.del('bar');
cache.set('baz', 3);
cache.set('qux', 4);
t.equal(cache.get('foo'), undefined)
t.equal(cache.get('bar'), undefined)
t.equal(cache.get('baz'), 3)
t.equal(cache.get('qux'), 4)
t.end()
})
test("least recently set w/ peek", function (t) {
var cache = new LRU(2)
cache.set("a", "A")
cache.set("b", "B")
t.equal(cache.peek("a"), "A")
cache.set("c", "C")
t.equal(cache.get("c"), "C")
t.equal(cache.get("b"), "B")
t.equal(cache.get("a"), undefined)
t.end()
})
test("pop the least used item", function (t) {
var cache = new LRU(3)
, last
cache.set("a", "A")
cache.set("b", "B")
cache.set("c", "C")
t.equal(cache.length, 3)
t.equal(cache.max, 3)
// Ensure we pop a, c, b
cache.get("b", "B")
last = cache.pop()
t.equal(last.key, "a")
t.equal(last.value, "A")
t.equal(cache.length, 2)
t.equal(cache.max, 3)
last = cache.pop()
t.equal(last.key, "c")
t.equal(last.value, "C")
t.equal(cache.length, 1)
t.equal(cache.max, 3)
last = cache.pop()
t.equal(last.key, "b")
t.equal(last.value, "B")
t.equal(cache.length, 0)
t.equal(cache.max, 3)
last = cache.pop()
t.equal(last, null)
t.equal(cache.length, 0)
t.equal(cache.max, 3)
t.end()
})
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