From 6e7832790c36b320880f4b6d38dc31388d1fae3a Mon Sep 17 00:00:00 2001
From: Jordan Harband <ljharb@gmail.com>
Date: Fri, 2 Feb 2024 12:07:56 -0800
Subject: [PATCH] [Tests] add test coverage

See https://github.com/tc39/test262/pull/4000
---
 test/tests.js | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/test/tests.js b/test/tests.js
index 5f0bf7f..e3a99b2 100644
--- a/test/tests.js
+++ b/test/tests.js
@@ -40,4 +40,22 @@ module.exports = function (flatMap, t) {
 
 		st.end();
 	});
+
+	t.test('test262: staging test from v8', function (st) {
+		var arr1 = [0, 1, 2, 3];
+		var f = function (e) {
+			arr1[4] = 42;
+			return e;
+		};
+		st.deepEqual(flatMap(arr1, f), [0, 1, 2, 3]);
+
+		var arr2 = [0, 1, 2, 3];
+		var g = function (e) {
+			arr2.length = 3;
+			return e;
+		};
+		st.deepEqual(flatMap(arr2, g), [0, 1, 2]);
+
+		st.end();
+	});
 };