malwoden/dist/lib/rand/alea.spec.js

   

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var alea_1 = require("./alea");
describe("AleaRNG", function () {
    it("Can generate numbers", function () {
        var aa = new alea_1.AleaRNG("hello");
        var bb = new alea_1.AleaRNG("hello");
        var cc = aa.clone();
        // Run them in sync to compare
        for (var i = 0; i < 100; i++) {
            var a = aa.next();
            var b = bb.next();
            var c = cc.next();
            expect(a).toEqual(b);
            expect(b).toEqual(c);
        }
        // Ints
        for (var i = 0; i < 100; i++) {
            var a = aa.nextInt();
            var b = bb.nextInt();
            var c = cc.nextInt();
            expect(a).toEqual(b);
            expect(b).toEqual(c);
        }
    });
    it("Will generate different numbers with different seeds", function () {
        var aa = new alea_1.AleaRNG(Math.random().toString());
        var bb = new alea_1.AleaRNG(Math.random().toString());
        var a = [];
        var b = [];
        for (var i = 0; i < 100; i++) {
            a.push(aa.next());
            b.push(bb.next());
        }
        expect(a).not.toEqual(b);
    });
    it("will generate numbers in the correct ranges", function () {
        var aa = new alea_1.AleaRNG();
        // ints
        var min = 50;
        var max = 55;
        for (var i = 0; i < 1000; i++) {
            var v = aa.nextInt(min, max);
            var v2 = aa.next(min, max);
            // Test int
            expect(v).toBeGreaterThanOrEqual(min);
            expect(v).toBeLessThan(max);
            // Test float
            expect(v2).toBeGreaterThanOrEqual(min);
            expect(v2).toBeLessThan(max);
        }
    });
    it("Can reset itself", function () {
        var aa = new alea_1.AleaRNG("hello");
        var bb = new alea_1.AleaRNG("hello");
        for (var i = 0; i < 10; i++) {
            aa.next();
        }
        aa.reset();
        for (var i = 0; i < 100; i++) {
            expect(aa.next()).toEqual(bb.next());
        }
    });
    it("Can get booleans", function () {
        var aa = new alea_1.AleaRNG();
        var bools = [];
        for (var i = 0; i < 100; i++) {
            bools.push(aa.nextBoolean());
        }
        expect(bools.some(function (x) { return x; })).toBeTruthy();
        expect(bools.some(function (x) { return !x; })).toBeTruthy();
    });
    it("Can get a random item from an array", function () {
        var aa = new alea_1.AleaRNG();
        var nums = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
        for (var i = 0; i < 100; i++) {
            var e = aa.nextItem(nums);
            expect(e).not.toBeUndefined();
            expect(nums.includes(e)).toBeTruthy();
        }
        expect(nums).toEqual([0, 1, 2, 3, 4, 5, 6, 7, 8, 9]);
        expect(aa.nextItem([])).toEqual(undefined);
    });
    it("Can shuffle an array", function () {
        var aa = new alea_1.AleaRNG();
        var alph = "abcdefghijklmnopqrstuvwxyz".split("");
        var alph2 = aa.shuffle(alph);
        expect(alph).toEqual("abcdefghijklmnopqrstuvwxyz".split(""));
        expect(alph).not.toEqual(alph2);
        expect(alph).toHaveLength(alph2.length);
        for (var _i = 0, alph_1 = alph; _i < alph_1.length; _i++) {
            var c = alph_1[_i];
            expect(alph2.indexOf(c)).toBeGreaterThanOrEqual(0);
        }
    });
    it("Will sanitize the initial mash function 0 < x < 1", function () {
        var a = new alea_1.AleaRNG();
        a["s0"] = -0.5;
        a["s1"] = -0.2;
        a["s2"] = -0.1;
        a["sanitize"]();
        expect(a["s0"]).toEqual(0.5);
        expect(a["s1"]).toEqual(0.8);
        expect(a["s2"]).toEqual(0.9);
    });
});
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