myapp/node_modules/@jest/core/build/collectHandles.js

'use strict';

Object.defineProperty(exports, '__esModule', {
  value: true
});
exports.default = collectHandles;
exports.formatHandleErrors = formatHandleErrors;

function _jestMessageUtil() {
  const data = require('jest-message-util');

  _jestMessageUtil = function _jestMessageUtil() {
    return data;
  };

  return data;
}

function _jestUtil() {
  const data = require('jest-util');

  _jestUtil = function _jestUtil() {
    return data;
  };

  return data;
}

function _stripAnsi() {
  const data = _interopRequireDefault(require('strip-ansi'));

  _stripAnsi = function _stripAnsi() {
    return data;
  };

  return data;
}

function _interopRequireDefault(obj) {
  return obj && obj.__esModule ? obj : {default: obj};
}

/**
 * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */
function stackIsFromUser(stack) {
  // Either the test file, or something required by it
  if (stack.includes('Runtime.requireModule')) {
    return true;
  } // jest-jasmine it or describe call

  if (stack.includes('asyncJestTest') || stack.includes('asyncJestLifecycle')) {
    return true;
  } // An async function call from within circus

  if (stack.includes('callAsyncCircusFn')) {
    // jest-circus it or describe call
    return (
      stack.includes('_callCircusTest') || stack.includes('_callCircusHook')
    );
  }

  return false;
} // Inspired by https://github.com/mafintosh/why-is-node-running/blob/master/index.js
// Extracted as we want to format the result ourselves

function collectHandles() {
  const activeHandles = new Map();
  let hook;

  try {
    const asyncHooks = require('async_hooks');

    hook = asyncHooks.createHook({
      destroy(asyncId) {
        activeHandles.delete(asyncId);
      },

      init: function initHook(asyncId, type) {
        if (type === 'PROMISE' || type === 'TIMERWRAP') {
          return;
        }

        const error = new (_jestUtil()).ErrorWithStack(type, initHook);

        if (stackIsFromUser(error.stack || '')) {
          activeHandles.set(asyncId, error);
        }
      }
    });
    hook.enable();
  } catch (e) {
    const nodeMajor = Number(process.versions.node.split('.')[0]);

    if (e.code === 'MODULE_NOT_FOUND' && nodeMajor < 8) {
      throw new Error(
        'You can only use --detectOpenHandles on Node 8 and newer.'
      );
    } else {
      throw e;
    }
  }

  return () => {
    hook.disable();
    const result = Array.from(activeHandles.values());
    activeHandles.clear();
    return result;
  };
}

function formatHandleErrors(errors, config) {
  const stacks = new Set();
  return (
    errors
      .map(err =>
        (0, _jestMessageUtil().formatExecError)(
          err,
          config,
          {
            noStackTrace: false
          },
          undefined,
          true
        )
      ) // E.g. timeouts might give multiple traces to the same line of code
      // This hairy filtering tries to remove entries with duplicate stack traces
      .filter(handle => {
        const ansiFree = (0, _stripAnsi().default)(handle);
        const match = ansiFree.match(/\s+at(.*)/);

        if (!match || match.length < 2) {
          return true;
        }

        const stack = ansiFree.substr(ansiFree.indexOf(match[1])).trim();

        if (stacks.has(stack)) {
          return false;
        }

        stacks.add(stack);
        return true;
      })
  );
}