fix(storage): use standard fast-xml-parser import for Metro compatibility

Replace the try/catch require workaround with a standard ESM import
of fast-xml-parser. Add react-native field to storage package.json
for proper Metro bundler resolution. Remove the now-unnecessary
__mocks__/fast-xml-parser.js and moduleNameMapper jest config.

Author: soberm

__mocks__/fast-xml-parser.js

@@ -122,10 +122,7 @@
 		"verbose": true,
 		"transformIgnorePatterns": [
 			"node_modules/(?!(fast-xml-parser)/)"
-		],
-		"moduleNameMapper": {
-			"fast-xml-parser/src/xmlparser/XMLParser.js": "<rootDir>/__mocks__/fast-xml-parser.js"
-		}
+		]
 	},
 	"packageManager": "yarn@1.22.22+sha512.a6b2f7906b721bba3d67d4aff083df04dad64c399707841b7acf00f6b133b7ac24255f2652fa22ae3534329dc6180534e98d17432037ff6fd140556e2bb3137e"
 }

package.json

@@ -5,6 +5,11 @@
   "main": "./lib/index.js",
   "module": "./lib-esm/index.js",
   "typings": "./lib-esm/index.d.ts",
+  "react-native": {
+    "./lib/index": "./src/index.ts",
+    "fast-xml-parser": "fast-xml-parser",
+    "buffer": "buffer"
+  },
   "browser": {
     "./lib-esm/AwsClients/S3/runtime/index.js": "./lib-esm/AwsClients/S3/runtime/index.browser.js",
     "./lib/AwsClients/S3/runtime/index.js": "./lib/AwsClients/S3/runtime/index.browser.js"
@@ -84,9 +89,6 @@
     "transformIgnorePatterns": [
       "node_modules/(?!(fast-xml-parser)/)"
     ],
-    "moduleNameMapper": {
-      "fast-xml-parser/src/xmlparser/XMLParser.js": "<rootDir>/../../__mocks__/fast-xml-parser.js"
-    },
     "moduleFileExtensions": [
       "ts",
       "tsx",

packages/storage/package.json

@@ -1,25 +1,18 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
 // SPDX-License-Identifier: Apache-2.0
 
-let XMLParser: any;
+import { XMLParser } from 'fast-xml-parser';
+
 /**
  * Pure JS XML parser that can be used in Non-browser environments, like React Native and Node.js. This is the same
  * XML parser implementation as used in AWS SDK S3 client. It depends on pure JavaScript XML parser library
  * `fast-xml-parser`.
  *
  * Ref: https://github.com/aws/aws-sdk-js-v3/blob/1e806ba3f4a83c9e3eb0b41a3a7092da93826b8f/clients/client-s3/src/protocols/Aws_restXml.ts#L12938-L12959
  */
-
-// Use require to avoid all ESM/Metro issues
-try {
-	XMLParser = require('fast-xml-parser/src/xmlparser/XMLParser.js');
-} catch (e) {
-	XMLParser = require('fast-xml-parser').XMLParser;
-}
-
 export const parser = {
 	parse: (xmlStr: string): any => {
-		const parser = new XMLParser({
+		const xmlParser = new XMLParser({
 			attributeNamePrefix: '',
 			htmlEntities: true,
 			ignoreAttributes: false,
@@ -30,9 +23,9 @@ export const parser = {
 			tagValueProcessor: (_, val) =>
 				val.trim() === '' && val.includes('\n') ? '' : undefined,
 		});
-		parser.addEntity('#xD', '\r');
-		parser.addEntity('#10', '\n');
-		const parsedObj = parser.parse(xmlStr);
+		xmlParser.addEntity('#xD', '\r');
+		xmlParser.addEntity('#10', '\n');
+		const parsedObj = xmlParser.parse(xmlStr);
 		const textNodeName = '#text';
 		const key = Object.keys(parsedObj)[0];
 		const parsedObjToReturn = parsedObj[key];