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backend/node_modules/fastify/lib/promise.js

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+'use strict'
+
+const { kTestInternals } = require('./symbols')
+
+function withResolvers () {
+  let res, rej
+  const promise = new Promise((resolve, reject) => {
+    res = resolve
+    rej = reject
+  })
+  return { promise, resolve: res, reject: rej }
+}
+
+module.exports = {
+  // TODO(20.x): remove when node@20 is not supported
+  withResolvers: typeof Promise.withResolvers === 'function'
+    ? Promise.withResolvers.bind(Promise) // Promise.withResolvers must bind to itself
+    /* c8 ignore next */
+    : withResolvers, // Tested using the kTestInternals
+  [kTestInternals]: {
+    withResolvers
+  }
+}