testing js app

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

@@ -0,0 +1,263 @@
+'use strict';
+
+Object.defineProperty(exports, '__esModule', {
+  value: true
+});
+exports.default = collectHandles;
+exports.formatHandleErrors = formatHandleErrors;
+
+function asyncHooks() {
+  const data = _interopRequireWildcard(require('async_hooks'));
+
+  asyncHooks = function () {
+    return data;
+  };
+
+  return data;
+}
+
+function _util() {
+  const data = require('util');
+
+  _util = function () {
+    return data;
+  };
+
+  return data;
+}
+
+function _stripAnsi() {
+  const data = _interopRequireDefault(require('strip-ansi'));
+
+  _stripAnsi = function () {
+    return data;
+  };
+
+  return data;
+}
+
+function _jestMessageUtil() {
+  const data = require('jest-message-util');
+
+  _jestMessageUtil = function () {
+    return data;
+  };
+
+  return data;
+}
+
+function _jestUtil() {
+  const data = require('jest-util');
+
+  _jestUtil = function () {
+    return data;
+  };
+
+  return data;
+}
+
+function _interopRequireDefault(obj) {
+  return obj && obj.__esModule ? obj : {default: obj};
+}
+
+function _getRequireWildcardCache(nodeInterop) {
+  if (typeof WeakMap !== 'function') return null;
+  var cacheBabelInterop = new WeakMap();
+  var cacheNodeInterop = new WeakMap();
+  return (_getRequireWildcardCache = function (nodeInterop) {
+    return nodeInterop ? cacheNodeInterop : cacheBabelInterop;
+  })(nodeInterop);
+}
+
+function _interopRequireWildcard(obj, nodeInterop) {
+  if (!nodeInterop && obj && obj.__esModule) {
+    return obj;
+  }
+  if (obj === null || (typeof obj !== 'object' && typeof obj !== 'function')) {
+    return {default: obj};
+  }
+  var cache = _getRequireWildcardCache(nodeInterop);
+  if (cache && cache.has(obj)) {
+    return cache.get(obj);
+  }
+  var newObj = {};
+  var hasPropertyDescriptor =
+    Object.defineProperty && Object.getOwnPropertyDescriptor;
+  for (var key in obj) {
+    if (key !== 'default' && Object.prototype.hasOwnProperty.call(obj, key)) {
+      var desc = hasPropertyDescriptor
+        ? Object.getOwnPropertyDescriptor(obj, key)
+        : null;
+      if (desc && (desc.get || desc.set)) {
+        Object.defineProperty(newObj, key, desc);
+      } else {
+        newObj[key] = obj[key];
+      }
+    }
+  }
+  newObj.default = obj;
+  if (cache) {
+    cache.set(obj, newObj);
+  }
+  return newObj;
+}
+
+/**
+ * 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.
+ */
+
+/* eslint-disable local/ban-types-eventually */
+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;
+}
+
+const alwaysActive = () => true; // @ts-expect-error: doesn't exist in v12 typings
+
+const hasWeakRef = typeof WeakRef === 'function';
+const asyncSleep = (0, _util().promisify)(setTimeout); // 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();
+  const hook = asyncHooks().createHook({
+    destroy(asyncId) {
+      activeHandles.delete(asyncId);
+    },
+
+    init: function initHook(asyncId, type, triggerAsyncId, resource) {
+      // Skip resources that should not generally prevent the process from
+      // exiting, not last a meaningfully long time, or otherwise shouldn't be
+      // tracked.
+      if (
+        type === 'PROMISE' ||
+        type === 'TIMERWRAP' ||
+        type === 'ELDHISTOGRAM' ||
+        type === 'PerformanceObserver' ||
+        type === 'RANDOMBYTESREQUEST' ||
+        type === 'DNSCHANNEL' ||
+        type === 'ZLIB' ||
+        type === 'SIGNREQUEST'
+      ) {
+        return;
+      }
+
+      const error = new (_jestUtil().ErrorWithStack)(type, initHook, 100);
+      let fromUser = stackIsFromUser(error.stack || ''); // If the async resource was not directly created by user code, but was
+      // triggered by another async resource from user code, track it and use
+      // the original triggering resource's stack.
+
+      if (!fromUser) {
+        const triggeringHandle = activeHandles.get(triggerAsyncId);
+
+        if (triggeringHandle) {
+          fromUser = true;
+          error.stack = triggeringHandle.error.stack;
+        }
+      }
+
+      if (fromUser) {
+        let isActive; // Handle that supports hasRef
+
+        if ('hasRef' in resource) {
+          if (hasWeakRef) {
+            // @ts-expect-error: doesn't exist in v12 typings
+            const ref = new WeakRef(resource);
+
+            isActive = () => {
+              var _ref$deref$hasRef, _ref$deref;
+
+              return (_ref$deref$hasRef =
+                (_ref$deref = ref.deref()) === null || _ref$deref === void 0
+                  ? void 0
+                  : _ref$deref.hasRef()) !== null &&
+                _ref$deref$hasRef !== void 0
+                ? _ref$deref$hasRef
+                : false;
+            };
+          } else {
+            isActive = resource.hasRef.bind(resource);
+          }
+        } else {
+          // Handle that doesn't support hasRef
+          isActive = alwaysActive;
+        }
+
+        activeHandles.set(asyncId, {
+          error,
+          isActive
+        });
+      }
+    }
+  });
+  hook.enable();
+  return async () => {
+    // Wait briefly for any async resources that have been queued for
+    // destruction to actually be destroyed.
+    // For example, Node.js TCP Servers are not destroyed until *after* their
+    // `close` callback runs. If someone finishes a test from the `close`
+    // callback, we will not yet have seen the resource be destroyed here.
+    await asyncSleep(100);
+    hook.disable(); // Get errors for every async resource still referenced at this moment
+
+    const result = Array.from(activeHandles.values())
+      .filter(({isActive}) => isActive())
+      .map(({error}) => error);
+    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;
+      })
+  );
+}