1 files changed, 49 insertions, 0 deletions
diff --git a/remote/test/puppeteer/packages/puppeteer-core/src/common/GetQueryHandler.ts b/remote/test/puppeteer/packages/puppeteer-core/src/common/GetQueryHandler.ts
new file mode 100644
index 0000000000..1d8bb01414
--- /dev/null
+++ b/remote/test/puppeteer/packages/puppeteer-core/src/common/GetQueryHandler.ts
@@ -0,0 +1,49 @@
+/**
+ * @license
+ * Copyright 2023 Google Inc.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import {ARIAQueryHandler} from '../cdp/AriaQueryHandler.js';
+
+import {customQueryHandlers} from './CustomQueryHandler.js';
+import {PierceQueryHandler} from './PierceQueryHandler.js';
+import {PQueryHandler} from './PQueryHandler.js';
+import type {QueryHandler} from './QueryHandler.js';
+import {TextQueryHandler} from './TextQueryHandler.js';
+import {XPathQueryHandler} from './XPathQueryHandler.js';
+
+const BUILTIN_QUERY_HANDLERS = {
+  aria: ARIAQueryHandler,
+  pierce: PierceQueryHandler,
+  xpath: XPathQueryHandler,
+  text: TextQueryHandler,
+} as const;
+
+const QUERY_SEPARATORS = ['=', '/'];
+
+/**
+ * @internal
+ */
+export function getQueryHandlerAndSelector(selector: string): {
+  updatedSelector: string;
+  QueryHandler: typeof QueryHandler;
+} {
+  for (const handlerMap of [
+    customQueryHandlers.names().map(name => {
+      return [name, customQueryHandlers.get(name)!] as const;
+    }),
+    Object.entries(BUILTIN_QUERY_HANDLERS),
+  ]) {
+    for (const [name, QueryHandler] of handlerMap) {
+      for (const separator of QUERY_SEPARATORS) {
+        const prefix = `${name}${separator}`;
+        if (selector.startsWith(prefix)) {
+          selector = selector.slice(prefix.length);
+          return {updatedSelector: selector, QueryHandler};
+        }
+      }
+    }
+  }
+  return {updatedSelector: selector, QueryHandler: PQueryHandler};
+}