chore: align some Web API type definitions to lib.dom.d.ts (#15219)

1 files changed, 13 insertions, 1 deletions

diff --git a/cli/tests/unit/websocket_test.ts b/cli/tests/unit/websocket_test.ts
index f033c5ac4..6bd35efca 100644
--- a/cli/tests/unit/websocket_test.ts
+++ b/cli/tests/unit/websocket_test.ts
@@ -1,5 +1,5 @@
 // Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
-import { assertThrows } from "./test_util.ts";
+import { assertEquals, assertThrows, deferred, fail } from "./test_util.ts";
 
 Deno.test({ permissions: "none" }, function websocketPermissionless() {
   assertThrows(
@@ -7,3 +7,15 @@ Deno.test({ permissions: "none" }, function websocketPermissionless() {
     Deno.errors.PermissionDenied,
   );
 });
+
+Deno.test(async function websocketConstructorTakeURLObjectAsParameter() {
+  const promise = deferred();
+  const ws = new WebSocket(new URL("ws://localhost:4242/"));
+  assertEquals(ws.url, "ws://localhost:4242/");
+  ws.onerror = () => fail();
+  ws.onopen = () => ws.close();
+  ws.onclose = () => {
+    promise.resolve();
+  };
+  await promise;
+});