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102 lines
3.1 KiB
JavaScript
102 lines
3.1 KiB
JavaScript
var assert = require('assert'),
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math = require('../../../index');
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describe('seed', function () {
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after(function () {
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// Randomly seed random number generator
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math.config({randomSeed: null});
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});
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it('should generate same number with seed', function () {
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math.config({randomSeed: 'a'});
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var first = math.random();
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math.config({randomSeed: 'a'});
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var second = math.random();
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assert.equal(first, second);
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});
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it('should generate different number subsequent calls to seeded random', function () {
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math.config({randomSeed: 'a'});
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var first = math.random();
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var second = math.random();
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assert.notEqual(first, second);
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});
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it('calling with no parameters should unseed rng', function () {
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math.config({randomSeed: 'a'});
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var firstA = math.random();
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var secondA = math.random();
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math.config({randomSeed: 'a'});
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var firstB = math.random();
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math.config({randomSeed: null});
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var secondB = math.random();
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assert.equal(firstA, firstB);
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assert.notEqual(secondA, secondB);
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});
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it('should generate same matrix with seed', function () {
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math.config({randomSeed: 'a'});
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var first = math.random([5, 5]);
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math.config({randomSeed: 'a'});
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var second = math.random([5, 5]);
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assert.equal(math.deepEqual(first, second), true);
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});
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it('should generate different matrices subsequent calls to seeded random', function () {
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math.config({randomSeed: 'a'});
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var first = math.random([5, 5]);
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var second = math.random([5, 5]);
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assert.equal(math.deepEqual(first, second), false);
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});
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it('should pick same number with seed', function () {
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var range = math.range(1,1000);
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math.config({randomSeed: 'a'});
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var first = math.pickRandom(range);
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math.config({randomSeed: 'a'});
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var second = math.pickRandom(range);
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assert.equal(first, second);
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});
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it('should pick different number subsequent calls to seeded random', function () {
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// In theory these might be the same but with 'a' as seed they are different and always will be
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var range = math.range(1, 1000);
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math.config({randomSeed: 'a'});
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var first = math.pickRandom(range);
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var second = math.pickRandom(range);
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assert.notEqual(first, second);
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});
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it('should pick same int with seed', function () {
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math.config({randomSeed: 'a'});
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var first = math.randomInt(1, 100);
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math.config({randomSeed: 'a'});
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var second = math.randomInt(1, 100);
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assert.equal(first, second);
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});
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it('should pick different int subsequent calls to seeded random', function () {
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math.config({randomSeed: 'a'});
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var first = math.randomInt(1, 100);
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var second = math.randomInt(1, 100);
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assert.notEqual(first, second);
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});
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it('should work for number seeds', function () {
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math.config({randomSeed: 1});
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var first = math.random();
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math.config({randomSeed: 1});
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var second = math.random();
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assert.equal(first, second);
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});
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it('should work for object seeds', function () {
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math.config({randomSeed: {a: 1}});
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var first = math.random();
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math.config({randomSeed: {a: 1}});
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var second = math.random();
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assert.equal(first, second);
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});
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});
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