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author | Florian Dold <florian.dold@gmail.com> | 2016-10-10 03:43:44 +0200 |
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committer | Florian Dold <florian.dold@gmail.com> | 2016-10-10 03:43:44 +0200 |
commit | abd94a7f5a50f43c797a11b53549ae48fff667c3 (patch) | |
tree | ab8ed457f65cdd72e13e0571d2975729428f1551 /node_modules/lru-cache/test/basic.js | |
parent | a0247c6a3fd6a09a41a7e35a3441324c4dcb58be (diff) | |
download | wallet-core-abd94a7f5a50f43c797a11b53549ae48fff667c3.tar.xz |
add node_modules to address #4364
Diffstat (limited to 'node_modules/lru-cache/test/basic.js')
-rw-r--r-- | node_modules/lru-cache/test/basic.js | 396 |
1 files changed, 396 insertions, 0 deletions
diff --git a/node_modules/lru-cache/test/basic.js b/node_modules/lru-cache/test/basic.js new file mode 100644 index 000000000..b47225f10 --- /dev/null +++ b/node_modules/lru-cache/test/basic.js @@ -0,0 +1,396 @@ +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() +}) |