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seed-random

seed-random

Generate random numbers with a seed, useful for reproducible tests

build status Dependency Status NPM version

Installation

$ npm install seed-random

API

var assert = require('assert');
var seed = require('../');
 
var trueRandomA = seed();
var trueRandomB = seed();
assert(trueRandomA() != trueRandomB());
 
var fakeRandomA = seed('foo');
var fakeRandomB = seed('foo');
assert(fakeRandomA() == fakeRandomB());
 
var fakeRandomC = seed('foo', {entropy: true});
var fakeRandomD = seed('foo', {entropy: true});
assert(fakeRandomC() != fakeRandomD());
 
 
seed('foo', {global: true});//over-ride global Math.random 
var numA = Math.random();
seed('foo', {global: true});
var numB = Math.random();
assert(numA == numB);//always true 
 
seed.resetGlobal();//reset to default Math.random 

License

MIT