Bug 1744858 [wpt PR 31947] - Tests for abortSignal.throwIfAborted();, a=testonly

Automatic update from web-platform-tests
Tests for abortSignal.throwIfAborted()

Follows whatwg/dom#1034.
--

wpt-commits: b03df354b93b285fe1764d567b7c1a074df4a808
wpt-pr: 31947

Author: jasnell

testing/web-platform/tests/dom/abort/event.any.js

@@ -168,4 +168,23 @@ test(t => {
   );
 }, "AbortController.signal.reason returns the same DOMException");
 
+test(t => {
+  const reason = new Error('boom');
+  const signal = AbortSignal.abort(reason);
+  assert_true(signal.aborted);
+  assert_throws_exactly(reason, () => signal.throwIfAborted());
+}, "throwIfAborted() should throw abort.reason if signal aborted");
+
+test(t => {
+  const signal = AbortSignal.abort('hello');
+  assert_true(signal.aborted);
+  assert_throws_exactly('hello', () => signal.throwIfAborted());
+}, "throwIfAborted() should throw primitive abort.reason if signal aborted");
+
+test(t => {
+  const controller = new AbortController();
+  assert_false(controller.signal.aborted);
+  controller.signal.throwIfAborted();
+}, "throwIfAborted() should not throw if signal not aborted");
+
 done();