1 files changed, 54 insertions, 0 deletions
diff --git a/dom/workers/test/browser_WorkerDebugger.initialize.js b/dom/workers/test/browser_WorkerDebugger.initialize.js
new file mode 100644
index 0000000000..edc20af4e0
--- /dev/null
+++ b/dom/workers/test/browser_WorkerDebugger.initialize.js
@@ -0,0 +1,54 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+const wdm = Cc["@mozilla.org/dom/workers/workerdebuggermanager;1"].getService(
+  Ci.nsIWorkerDebuggerManager
+);
+
+const BASE_URL = "chrome://mochitests/content/browser/dom/workers/test/";
+const WORKER_URL = BASE_URL + "WorkerDebugger.initialize_es_worker.js";
+const DEBUGGER_URL =
+  BASE_URL + "WorkerDebugger.initialize_debugger_es_worker.js";
+
+add_task(async function test() {
+  const onDbg = waitForRegister(WORKER_URL);
+  const worker = new Worker(WORKER_URL, { type: "module" });
+
+  info("Wait for worker message");
+  await new Promise(resolve => (worker.onmessage = resolve));
+
+  const dbg = await onDbg;
+
+  info("Calling WorkerDebugger::Initialize");
+  const onDebuggerScriptEvaluated = new Promise(resolve => {
+    const listener = {
+      onMessage(msg) {
+        is(msg, "debugger script ran");
+        dbg.removeListener(listener);
+        resolve();
+      },
+    };
+    dbg.addListener(listener);
+  });
+  dbg.initialize(DEBUGGER_URL);
+  ok(true, "dbg.initialize didn't throw");
+
+  info("Waiting for debugger script to be evaluated and dispatching a message");
+  await onDebuggerScriptEvaluated;
+});
+
+function waitForRegister(url, dbgUrl) {
+  return new Promise(function (resolve) {
+    wdm.addListener({
+      onRegister(dbg) {
+        if (dbg.url !== url) {
+          return;
+        }
+        ok(true, "Debugger with url " + url + " should be registered.");
+        wdm.removeListener(this);
+        resolve(dbg);
+      },
+    });
+  });
+}