ipfs-interop/test/utils/wait-for.js

Interoperability Tests for IPFS

import delay from 'delay'

/**
 * Wait for a condition to become true
 *
 * @param {() => boolean} predicate
 * @param {number} ttl
 * @param {number} checkInterval
 */
export async function waitFor (predicate, ttl = 10e3, checkInterval = 50) {
  const timeout = Date.now() + ttl

  while (true) {
    if (predicate()) {
      return
    }

    await delay(checkInterval)

    if (Date.now() > timeout) {
      throw new Error('waitFor time expired')
    }
  }
}