feat: make windows flow pass

Signed-off-by: SuZhou-Joe <[email protected]>

babel.config.js

@@ -0,0 +1,26 @@
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+// babelrc doesn't respect NODE_PATH anymore but using require does.
+// Alternative to install them locally in node_modules
+module.exports = function (api) {
+  // ensure env is test so that this config won't impact build or dev server
+  if (api.env('test')) {
+    return {
+      presets: [
+        require('@babel/preset-env'),
+        require('@babel/preset-react'),
+        require('@babel/preset-typescript'),
+      ],
+      plugins: [
+        [require('@babel/plugin-transform-runtime'), { regenerator: true }],
+        require('@babel/plugin-proposal-class-properties'),
+        require('@babel/plugin-proposal-object-rest-spread'),
+        [require('@babel/plugin-transform-modules-commonjs'), { allowTopLevelThis: true }],
+      ],
+    };
+  }
+  return {};
+};

test/jest.config.js

@@ -22,11 +22,7 @@ module.exports = {
     '<rootDir>/public/requests/',
     '/__utils__/',
   ],
-  transform: {
-    '^.+\\.tsx?$': ['ts-jest', { diagnostics: false }],
-    'node_modules/(langchain|langsmith)/.+\\.js$': ['ts-jest', { diagnostics: false }],
-  },
-  transformIgnorePatterns: ['<rootDir>/node_modules/(?!langchain|langsmith)'],
+  transformIgnorePatterns: ['node_modules/(?!langchain|langsmith)'],
   moduleNameMapper: {
     '\\.(css|less|sass|scss)$': '<rootDir>/test/__mocks__/styleMock.js',
     '\\.(gif|ttf|eot|svg|png)$': '<rootDir>/test/__mocks__/fileMock.js',