1 files changed, 65 insertions, 0 deletions
diff --git a/dom/workers/test/sourcemap_header.js b/dom/workers/test/sourcemap_header.js
new file mode 100644
index 0000000000..9f10b35ed9
--- /dev/null
+++ b/dom/workers/test/sourcemap_header.js
@@ -0,0 +1,65 @@
+/**
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ */
+"use strict";
+
+(async () => {
+  SimpleTest.waitForExplicitFinish();
+
+  const HTTP_BASE_URL = "http://mochi.test:8888/tests/dom/workers/test/";
+  const IFRAME_URL = HTTP_BASE_URL + "sourcemap_header_iframe.html";
+  const WORKER_URL = HTTP_BASE_URL + "sourcemap_header_worker.js";
+  const DEBUGGER_URL = BASE_URL + "sourcemap_header_debugger.js";
+
+  const workerFrame = document.getElementById("worker-frame");
+  ok(workerFrame, "has frame");
+
+  await new Promise(r => {
+    workerFrame.onload = r;
+    workerFrame.src = IFRAME_URL;
+  });
+
+  info("Start worker and watch for registration");
+  const workerLoadedChannel = new MessageChannel();
+
+  const loadDebuggerAndWorker = Promise.all([
+    waitForRegister(WORKER_URL, DEBUGGER_URL),
+    // We need to wait for the worker to load so a Debugger.Source will be
+    // guaranteed to exist.
+    new Promise(r => {
+      workerLoadedChannel.port1.onmessage = r;
+    }),
+  ]);
+  workerFrame.contentWindow.postMessage(WORKER_URL, "*", [
+    workerLoadedChannel.port2,
+  ]);
+  const [dbg] = await loadDebuggerAndWorker;
+
+  // Wait for the debugger server to reply with the sourceMapURL of the
+  // loaded worker scripts.
+  info("Querying for the sourceMapURL of the worker script");
+  const urls = await new Promise(res => {
+    dbg.addListener({
+      onMessage(msg) {
+        const data = JSON.parse(msg);
+        if (data.type !== "response-sourceMapURL") {
+          return;
+        }
+        dbg.removeListener(this);
+        res(data.value);
+      },
+    });
+    dbg.postMessage(
+      JSON.stringify({
+        type: "request-sourceMapURL",
+        url: WORKER_URL,
+      })
+    );
+  });
+
+  ok(Array.isArray(urls) && urls.length === 1, "has a single source actor");
+  is(urls[0], "worker-header.js.map", "has the right map URL");
+
+  SimpleTest.finish();
+})();