+const { WorkerFunctions } = require('./test-types')
+
class TestUtils {
static async waitExits (pool, numberOfExitEventsToWait) {
- let exitEvents = 0
- return new Promise(function (resolve, reject) {
- pool.workers.forEach(w => {
- w.on('exit', () => {
+ return new Promise(resolve => {
+ let exitEvents = 0
+ for (const worker of pool.workers) {
+ worker.on('exit', () => {
exitEvents++
if (exitEvents === numberOfExitEventsToWait) {
resolve(exitEvents)
}
})
- })
+ }
})
}
static async sleep (ms) {
return new Promise(resolve => setTimeout(resolve, ms))
}
+
+ static async sleepWorkerFunction (
+ data,
+ ms,
+ rejection = false,
+ rejectionMessage = ''
+ ) {
+ return new Promise((resolve, reject) => {
+ setTimeout(
+ () =>
+ rejection === true
+ ? reject(new Error(rejectionMessage))
+ : resolve(data),
+ ms
+ )
+ })
+ }
+
+ static generateRandomInteger (max = Number.MAX_SAFE_INTEGER, min = 0) {
+ if (max < min || max < 0 || min < 0) {
+ throw new RangeError('Invalid interval')
+ }
+ max = Math.floor(max)
+ if (min != null && min !== 0) {
+ min = Math.ceil(min)
+ return Math.floor(Math.random() * (max - min + 1)) + min
+ }
+ return Math.floor(Math.random() * (max + 1))
+ }
+
+ static jsonIntegerSerialization (n) {
+ for (let i = 0; i < n; i++) {
+ const o = {
+ a: i
+ }
+ JSON.stringify(o)
+ }
+ }
+
+ /**
+ * Intentionally inefficient implementation.
+ *
+ * @param {number} n - The number of fibonacci numbers to generate.
+ * @returns {number} - The nth fibonacci number.
+ */
+ static fibonacci (n) {
+ if (n <= 1) return 1
+ return TestUtils.fibonacci(n - 1) + TestUtils.fibonacci(n - 2)
+ }
+
+ /**
+ * Intentionally inefficient implementation.
+ *
+ * @param {number} n - The number to calculate the factorial of.
+ * @returns {number} - The factorial of n.
+ */
+ static factorial (n) {
+ if (n === 0) {
+ return 1
+ } else {
+ return TestUtils.factorial(n - 1) * n
+ }
+ }
+
+ static executeWorkerFunction (data) {
+ switch (data.function) {
+ case WorkerFunctions.jsonIntegerSerialization:
+ return TestUtils.jsonIntegerSerialization(data.n || 100)
+ case WorkerFunctions.fibonacci:
+ return TestUtils.fibonacci(data.n || 25)
+ case WorkerFunctions.factorial:
+ return TestUtils.factorial(data.n || 100)
+ default:
+ throw new Error('Unknown worker function')
+ }
+ }
}
module.exports = TestUtils