From 0fe97cdfe491d4a4e0f8490fb409e1f075b14b3b Mon Sep 17 00:00:00 2001
From: Ali Mohammad Pur <ali.mpfard@gmail.com>
Date: Tue, 22 Feb 2022 07:47:48 +0330
Subject: [PATCH] LibJS: Print the expected and received value on
 expect.toEqual() failure

'ExpectationError' is hardly an actionable error message.
---
 Userland/Libraries/LibJS/Tests/test-common.js | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/Userland/Libraries/LibJS/Tests/test-common.js b/Userland/Libraries/LibJS/Tests/test-common.js
index b02c9cb287..a43477902e 100644
--- a/Userland/Libraries/LibJS/Tests/test-common.js
+++ b/Userland/Libraries/LibJS/Tests/test-common.js
@@ -280,7 +280,13 @@ class ExpectationError extends Error {
 
         toEqual(value) {
             this.__doMatcher(() => {
-                this.__expect(deepEquals(this.target, value));
+                this.__expect(
+                    deepEquals(this.target, value),
+                    () =>
+                        `Expected _${valueToString(value)}_, but got _${valueToString(
+                            this.target
+                        )}_`
+                );
             });
         }