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index.spec.js
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index.spec.js
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'use strict';
const assert = require('assert');
const DelayIteratee = require('.');
const asyncLib = require('async');
const { delay } = require('.');
describe('DelayIteratee', () => {
const coll = ['A', 'B', 'C', 'D', 'E', 'F'];
const delayTime = 200;
const toleranceTime = delayTime * 0.1;
function testResult (result, delayTime, toleranceTime) {
for (let i in result) {
const { time, value } = result[i];
assert.ok(value === coll[i].toLowerCase());
assert.ok(time >= (delayTime * i) - toleranceTime && time <= (delayTime * i) + toleranceTime);
}
}
it ('should work with Promise.all()', async () => {
const start_at = Date.now();
const iteratee = async item => {
let time = Date.now() - start_at;
// console.log(`at ${time}ms do ${item}`);
await delay(300);
return { time, value : item.toLowerCase() };
};
const result = await Promise.all(coll.map(DelayIteratee(delayTime, iteratee)));
assert.ok(result.length === coll.length);
testResult(result, delayTime, toleranceTime);
});
it ('should work with asyncLib.eachLimit()', async () => {
const result = [];
const start_at = Date.now();
const iteratee = async item => {
let time = Date.now() - start_at;
// console.log(`at ${time}ms do ${item}`);
await delay(300);
result.push({ time, value : item.toLowerCase() });
};
await asyncLib.eachLimit(coll, 3, DelayIteratee(delayTime, iteratee));
assert.ok(result.length === coll.length);
testResult(result, delayTime, toleranceTime);
});
})