From 622153db1822f71afe9efddc35023953a9f16b40 Mon Sep 17 00:00:00 2001
From: Max Schmitt <max@schmitt.mx>
Date: Wed, 31 Jan 2024 23:43:37 +0100
Subject: [PATCH] Revert "chore: remove fake `error` from expect calls
 (#28112)" (#29271)

This reverts commit 2c3955a28c2af6b97a430dfc97fe756d40fcfbda.

Relates https://github.com/microsoft/playwright-python/issues/2258
---
 .../playwright-core/src/server/dispatchers/frameDispatcher.ts   | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/packages/playwright-core/src/server/dispatchers/frameDispatcher.ts b/packages/playwright-core/src/server/dispatchers/frameDispatcher.ts
index b335f27ea0..6782926e7b 100644
--- a/packages/playwright-core/src/server/dispatchers/frameDispatcher.ts
+++ b/packages/playwright-core/src/server/dispatchers/frameDispatcher.ts
@@ -262,6 +262,8 @@ export class FrameDispatcher extends Dispatcher<Frame, channels.FrameChannel, Br
     const result = await this._frame.expect(metadata, params.selector, { ...params, expectedValue });
     if (result.received !== undefined)
       result.received = serializeResult(result.received);
+    if (result.matches === params.isNot)
+      metadata.error = { error: { name: 'Expect', message: 'Expect failed' } };
     return result;
   }
 }