Initial investigation of custom helper type definition issue

Co-authored-by: kobenguyent <7845001+kobenguyent@users.noreply.github.com>

Author: Copilot

test/data/sandbox/configs/custom-helper-esm/codecept.conf.js

@@ -0,0 +1,14 @@
+export const config = {
+  tests: './*_test.js',
+  output: './output',
+  helpers: {
+    FileSystem: {},
+    MyHelper: {
+      require: './myhelper_helper.js',
+    },
+  },
+  include: {},
+  bootstrap: false,
+  mocha: {},
+  name: 'custom-helper-esm',
+};

test/data/sandbox/configs/custom-helper-esm/myhelper_helper.js

@@ -0,0 +1,9 @@
+import Helper from '../../../../../lib/helper.js';
+
+class MyHelper extends Helper {
+  openPage(url) {
+    return this.helpers.FileSystem.amInPath(url);
+  }
+}
+
+export default MyHelper;

test/data/sandbox/configs/custom-helper-esm/steps.d.ts

@@ -0,0 +1,11 @@
+/// <reference types='codeceptjs' />
+type MyHelper = import('./myhelper_helper.js');
+
+declare namespace CodeceptJS {
+  interface SupportObject { I: I, current: any }
+  interface Methods extends FileSystem, MyHelper {}
+  interface I extends WithTranslation<Methods> {}
+  namespace Translation {
+    interface Actions {}
+  }
+}