test_runner: empty pending tests queue post running

PR-URL: https://github.com/nodejs/node/pull/44059
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>

lib/internal/test_runner/test.js

@@ -523,6 +523,7 @@ class Test extends AsyncResource {
 
     // The test has run, so recursively cancel any outstanding subtests and
     // mark this test as failed if any subtests failed.
+    this.pendingSubtests = [];
     for (let i = 0; i < this.subtests.length; i++) {
       const subtest = this.subtests[i];
 

test/message/test_runner_unresolved_promise.js

@@ -5,4 +5,4 @@ const test = require('node:test');
 
 test('pass');
 test('never resolving promise', () => new Promise(() => {}));
-test('fail');
+test('fail', () => console.log('this should not appear'));

test/message/test_runner_unresolved_promise.out

@@ -17,7 +17,7 @@ not ok 2 - never resolving promise
 # Subtest: fail
 not ok 3 - fail
   ---
-  duration_ms: *
+  duration_ms: 0
   failureType: 'cancelledByParent'
   error: 'test did not finish before its parent and was cancelled'
   code: 'ERR_TEST_FAILURE'