fix(ext/web): align DOMException better with spec (#15097)

1 files changed, 15 insertions, 1 deletions

diff --git a/cli/tests/unit/dom_exception_test.ts b/cli/tests/unit/dom_exception_test.ts
index 01f7b5db5..b6b6a4440 100644
--- a/cli/tests/unit/dom_exception_test.ts
+++ b/cli/tests/unit/dom_exception_test.ts
@@ -1,4 +1,8 @@
-import { assertEquals, assertStringIncludes } from "./test_util.ts";
+import {
+  assertEquals,
+  assertNotEquals,
+  assertStringIncludes,
+} from "./test_util.ts";
 
 Deno.test(function customInspectFunction() {
   const blob = new DOMException("test");
@@ -8,3 +12,13 @@ Deno.test(function customInspectFunction() {
   );
   assertStringIncludes(Deno.inspect(DOMException.prototype), "DOMException");
 });
+
+Deno.test(function nameToCodeMappingPrototypeAccess() {
+  const newCode = 100;
+  const objectPrototype = Object.prototype as unknown as {
+    pollution: number;
+  };
+  objectPrototype.pollution = newCode;
+  assertNotEquals(newCode, new DOMException("test", "pollution").code);
+  Reflect.deleteProperty(objectPrototype, "pollution");
+});