fix: add extensions to the test option of React plugin (#24)

Author: chenjiahan

package.json

@@ -40,7 +40,7 @@
 		"@playwright/test": "^1.54.1",
 		"@rsbuild/core": "^1.4.12",
 		"@rsbuild/plugin-preact": "^1.5.1",
-		"@rsbuild/plugin-react": "^1.3.4",
+		"@rsbuild/plugin-react": "^1.4.0",
 		"@rsbuild/plugin-svgr": "^1.2.1",
 		"@rsbuild/plugin-vue": "^1.1.0",
 		"@rslib/core": "^0.11.0",

pnpm-lock.yaml

@@ -63,6 +63,14 @@ export const pluginMdx = (options: PluginMdxOptions = {}): RsbuildPlugin => ({
 			if (chain.plugins.has(REACT_FAST_REFRESH)) {
 				chain.plugins.get(REACT_FAST_REFRESH).tap((options) => {
 					const firstOption = options[0] ?? {};
+					if (firstOption.test) {
+						firstOption.test = [
+							...(Array.isArray(firstOption.test)
+								? firstOption.test
+								: [firstOption.test]),
+							MDX_REGEXP,
+						];
+					}
 					firstOption.include = [...(firstOption.include || []), MDX_REGEXP];
 					options[0] = firstOption;
 					return options;