`URLSearchParams` deleting appended multiple (#2201)

1 files changed, 14 insertions, 0 deletions

diff --git a/js/url_search_params_test.ts b/js/url_search_params_test.ts
index 9b20b3b75..8da11382f 100644
--- a/js/url_search_params_test.ts
+++ b/js/url_search_params_test.ts
@@ -182,3 +182,17 @@ test(function urlSearchParamsAppendArgumentsCheck(): void {
     }
   );
 });
+
+// ref: https://github.com/web-platform-tests/wpt/blob/master/url/urlsearchparams-delete.any.js
+test(function urlSearchParamsDeletingAppendedMultiple(): void {
+  const params = new URLSearchParams();
+  params.append("first", (1 as unknown) as string);
+  assert(params.has("first"));
+  assertEquals(params.get("first"), "1");
+  params.delete("first");
+  assertEquals(params.has("first"), false);
+  params.append("first", (1 as unknown) as string);
+  params.append("first", (10 as unknown) as string);
+  params.delete("first");
+  assertEquals(params.has("first"), false);
+});