add assertOps sanitizer in cli/js/ unit tests (#4209)

* add "assertOps" test assertion which makes sure test case
  is not "leaking" ops - ie. after test finishes there are no 
  pending async ops

* apply "assertOps" to all tests in "cli/js/"

* fix numerous tests leaking ops

* document problem with edge case in "clearInterval"
   and "clearTimeout" implementation where they
   may leak async ops

* move "cli/js/worker_test.ts" to "cli/tests/worker_test.ts" and 
  run as integration test; workers leak ops because of missing
  "terminate" implementation

1 files changed, 0 insertions, 11 deletions

diff --git a/cli/tests/workers_basic.ts b/cli/tests/workers_basic.ts
deleted file mode 100644
index 64bd58fcc..000000000
--- a/cli/tests/workers_basic.ts
+++ /dev/null
@@ -1,11 +0,0 @@
-// Tests basic postMessage, close, onmessage
-const jsWorker = new Worker("./subdir/test_worker_basic.js", {
-  type: "module",
-  name: "jsWorker"
-});
-
-jsWorker.onmessage = (e): void => {
-  console.log("main recv: " + e.data);
-};
-
-jsWorker.postMessage("msg1");