Update test framework: fix run_tests.py to support all test files, add auto-import-check for test files

node_modules/import-in-the-middle/test/hook/define-property.js

@@ -0,0 +1,20 @@
+// Unless explicitly stated otherwise all files in this repository are licensed under the Apache 2.0 License.
+//
+// This product includes software developed at Datadog (https://www.datadoghq.com/). Copyright 2021 Datadog, Inc.
+
+const Hook = require('../../index.js')
+const { rejects } = require('assert')
+
+Hook((exports, name) => {
+  if (name === 'os') {
+    Object.defineProperty(exports, 'freemem', {
+      get: () => () => 47
+    })
+  }
+})
+
+;(async () => {
+  rejects(async () => {
+    await import('os')
+  })
+})()