Add type weak-napi use in jest-leak-detector and import package at top level

Author: lh0x00

packages/jest-leak-detector/package.json

@@ -11,10 +11,11 @@
   "types": "build/index.d.ts",
   "dependencies": {
     "jest-get-type": "^24.8.0",
-    "pretty-format": "^24.8.0"
+    "pretty-format": "^24.8.0",
+    "weak-napi": "^1.0.3"
   },
   "devDependencies": {
-    "weak-napi": "^1.0.3"
+    "@types/weak-napi": "^1.0.0"
   },
   "engines": {
     "node": ">= 6"

packages/jest-leak-detector/src/index.ts

@@ -7,6 +7,7 @@
 
 import v8 from 'v8';
 import vm from 'vm';
+import weak from 'weak-napi';
 import prettyFormat from 'pretty-format';
 import {isPrimitive} from 'jest-get-type';
 
@@ -23,23 +24,7 @@ export default class {
       );
     }
 
-    let weak;
-
-    try {
-      // eslint-disable-next-line import/no-extraneous-dependencies
-      weak = require('weak-napi');
-    } catch (err) {
-      if (!err || err.code !== 'MODULE_NOT_FOUND') {
-        throw err;
-      }
-
-      throw new Error(
-        'The leaking detection mechanism requires the "weak-api" package to be installed and work. ' +
-          'Please install it as a dependency on your main project',
-      );
-    }
-
-    weak(value, () => (this._isReferenceBeingHeld = false));
+    weak(value as object, () => (this._isReferenceBeingHeld = false));
     this._isReferenceBeingHeld = true;
 
     // Ensure value is not leaked by the closure created by the "weak" callback.

yarn.lock

@@ -2103,6 +2103,13 @@
   resolved "https://registry.yarnpkg.com/@types/tough-cookie/-/tough-cookie-2.3.5.tgz#9da44ed75571999b65c37b60c9b2b88db54c585d"
   integrity sha512-SCcK7mvGi3+ZNz833RRjFIxrn4gI1PPR3NtuIS+6vMkvmsGjosqTJwRt5bAEFLRz+wtJMWv8+uOnZf2hi2QXTg==
 
+"@types/weak-napi@^1.0.0":
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/@types/weak-napi/-/weak-napi-1.0.0.tgz#b0977c0737cb62d028c4eda76f4e295bb3ae3c49"
+  integrity sha512-viW/kPA1gpeoNdUge025WqmThQ2lnnHzZWZJM5KlH8w9E5YehOh3GnDjW5w/sAEC91VOlePEiFSQmbnX7VVyLw==
+  dependencies:
+    "@types/node" "*"
+
 "@types/write-file-atomic@^2.1.1":
   version "2.1.2"
   resolved "https://registry.yarnpkg.com/@types/write-file-atomic/-/write-file-atomic-2.1.2.tgz#1657761692b70cf9ad2593e4eb4ac498adb9463f"