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module.exports = {
timeout,
queryAsync,
findAsync,
pollUntilTruthy,
}
function timeout (time) {
return new Promise((resolve, reject) => {
setTimeout(resolve, time || 1500)
})
}
async function findAsync(container, selector, opts) {
try {
return await pollUntilTruthy(() => {
const result = container.find(selector)
if (result.length > 0) return result
}, opts)
} catch (err) {
throw new Error(`Failed to find element within interval: "${selector}"`)
}
}
async function queryAsync(jQuery, selector, opts) {
try {
return await pollUntilTruthy(() => {
const result = jQuery(selector)
if (result.length > 0) return result
}, opts)
} catch (err) {
throw new Error(`Failed to find element within interval: "${selector}"`)
}
}
async function pollUntilTruthy(fn, opts = {}){
const pollingInterval = opts.pollingInterval || 100
const timeoutInterval = opts.timeoutInterval || 5000
const start = Date.now()
let result
while (!result) {
// check if timedout
const now = Date.now()
if ((now - start) > timeoutInterval) {
throw new Error(`pollUntilTruthy - failed to return truthy within interval`)
}
// check for result
result = fn()
// run again after timeout
await timeout(pollingInterval, timeoutInterval)
}
return result
}
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