From db4f62187c64a73307bee0e8451c285cf5abdecf Mon Sep 17 00:00:00 2001
From: thelovekesh <lovekesh.kumar@rtcamp.com>
Date: Sat, 6 May 2023 18:46:39 +0530
Subject: [PATCH] Add custom jest resolver to fix export statement syntax
 errors

See: https://github.com/WordPress/gutenberg/pull/47388#issuecomment-1534502094
---
 tests/js/jest.config.js |  1 +
 tests/js/resolver.js    | 33 +++++++++++++++++++++++++++++++++
 2 files changed, 34 insertions(+)
 create mode 100644 tests/js/resolver.js

diff --git a/tests/js/jest.config.js b/tests/js/jest.config.js
index efebe06fb39..b2b2cc052d8 100644
--- a/tests/js/jest.config.js
+++ b/tests/js/jest.config.js
@@ -1,6 +1,7 @@
 module.exports = {
 	rootDir: '../../',
 	...require('@wordpress/scripts/config/jest-unit.config'),
+	resolver: '<rootDir>/tests/js/resolver.js',
 	transform: {
 		'^.+\\.[jt]sx?$':
 			'<rootDir>/node_modules/@wordpress/scripts/config/babel-transform',
diff --git a/tests/js/resolver.js b/tests/js/resolver.js
new file mode 100644
index 00000000000..a1f00cc5905
--- /dev/null
+++ b/tests/js/resolver.js
@@ -0,0 +1,33 @@
+// See: https://github.com/WordPress/gutenberg/blob/61aa916e4e55d9eefa06abff884e3dde9bd1b2eb/test/unit/scripts/resolver.js
+module.exports = (path, options) => {
+	// Call the defaultResolver, so we leverage its cache, error handling, etc.
+	return options.defaultResolver(path, {
+		...options,
+		// Use packageFilter to process parsed `package.json` before the resolution (see https://www.npmjs.com/package/resolve#resolveid-opts-cb)
+		packageFilter: (pkg) => {
+			// This is a workaround for https://github.com/uuidjs/uuid/pull/616
+			//
+			// jest-environment-jsdom 28+ tries to use browser exports instead of default exports,
+			// but uuid v8 only offers an ESM browser export and not a CommonJS one. Jest does not yet
+			// support ESM modules natively, so this causes a Jest error related to trying to parse
+			// "export" syntax.
+			//
+			// This workaround prevents Jest from considering uuid's module-based exports at all;
+			// it falls back to uuid's CommonJS+node "main" property.
+			//
+			// Once we're able to migrate our Jest config to ESM and a browser crypto
+			// implementation is available for the browser+ESM version of uuid to use (eg, via
+			// https://github.com/jsdom/jsdom/pull/3352 or a similar polyfill), this can go away.
+			if (
+				pkg.name === 'uuid' ||
+				pkg.name === 'react-colorful' ||
+				pkg.name === '@eslint/eslintrc' ||
+				pkg.name === 'expect'
+			) {
+				delete pkg.exports;
+				delete pkg.module;
+			}
+			return pkg;
+		},
+	});
+};