themer/dist/template/index.spec.js

Customizable theme creator for editors, terminals, wallpaper, and more.

import test from 'ava';
import { weightedRandom } from './index.js';
test('weightedRandom', (t) => {
    const testData = new Map([
        ['a', 1],
        ['b', 3],
        ['c', 1],
    ]);
    const total = [...testData.values()].reduce((total, weight) => total + weight, 0);
    const samples = 1000;
    let aFrequency = 0, bFrequency = 0, cFrequency = 0;
    for (let i = 0; i < total * samples; i++) {
        switch (weightedRandom(testData)) {
            case 'a':
                aFrequency++;
                break;
            case 'b':
                bFrequency++;
                break;
            case 'c':
                cFrequency++;
                break;
        }
    }
    t.is(Math.round(aFrequency / samples), 1);
    t.is(Math.round(bFrequency / samples), 3);
    t.is(Math.round(cFrequency / samples), 1);
});
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