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refactor: remove seeding from randomVal

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This commit is contained in:
Blade Barringer
2016-09-24 21:25:14 -05:00
parent 136e2de125
commit 331993c1df
2 changed files with 5 additions and 6 deletions
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3
test/common/fns/randomVal.js
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@@ -40,12 +40,11 @@ describe('shared.fns.randomVal', () => {
let result = randomVal(obj, {
user,
seed: 100,
randomFunc: randomSpy,
predictableRandom: randomSpy,
});
expect(Math.random).to.not.be.called;
expect(randomSpy).to.be.calledOnce;
expect(randomSpy).to.be.calledWith(user, 100);
expect(result).to.equal(2);
});

8
website/common/script/fns/randomVal.js
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@@ -3,17 +3,17 @@ import _ from 'lodash';
// Get a random property from an object
// returns random property (the value)
function randomGenerator (user, seed, providedRandom) {
return providedRandom ? providedRandom(user, seed) : Math.random();
function trueRandom () {
return Math.random();
}
module.exports = function randomVal (obj, options = {}) {
let array = options.key ? _.keys(obj) : _.values(obj);
let rand = randomGenerator(options.user, options.seed, options.randomFunc);
let random = (options.predictableRandom || trueRandom)();
array.sort();
let randomIndex = Math.floor(rand * array.length);
let randomIndex = Math.floor(random * array.length);
return array[randomIndex];
};