1 files changed, 110 insertions, 0 deletions
diff --git a/devtools/shared/worker/tests/browser/browser_worker-01.js b/devtools/shared/worker/tests/browser/browser_worker-01.js
new file mode 100644
index 0000000000..a8dafcf4cb
--- /dev/null
+++ b/devtools/shared/worker/tests/browser/browser_worker-01.js
@@ -0,0 +1,110 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Tests that the devtools/shared/worker communicates properly
+// as both CommonJS module and as a JSM.
+
+const BUFFER_SIZE = 8;
+
+registerCleanupFunction(function () {
+  Services.prefs.clearUserPref("security.allow_parent_unrestricted_js_loads");
+});
+
+add_task(async function () {
+  // Test both CJS and JSM versions
+
+  await testWorker("JSM", () =>
+    ChromeUtils.import("resource://devtools/shared/worker/worker.js")
+  );
+  await testWorker("CommonJS", () =>
+    require("resource://devtools/shared/worker/worker.js")
+  );
+  await testTransfer();
+});
+
+async function testWorker(context, workerFactory) {
+  // Needed for blob:null
+  Services.prefs.setBoolPref(
+    "security.allow_parent_unrestricted_js_loads",
+    true
+  );
+  const { DevToolsWorker, workerify } = workerFactory();
+
+  const blob = new Blob(
+    [
+      `
+importScripts("resource://gre/modules/workers/require.js");
+const { createTask } = require("resource://devtools/shared/worker/helper.js");
+
+createTask(self, "groupByField", function({
+  items,
+  groupField
+}) {
+  const groups = {};
+  for (const item of items) {
+    if (!groups[item[groupField]]) {
+      groups[item[groupField]] = [];
+    }
+    groups[item[groupField]].push(item);
+  }
+  return { groups };
+});
+    `,
+    ],
+    { type: "application/javascript" }
+  );
+
+  const WORKER_URL = URL.createObjectURL(blob);
+  const worker = new DevToolsWorker(WORKER_URL);
+
+  const results = await worker.performTask("groupByField", {
+    items: [
+      { name: "Paris", country: "France" },
+      { name: "Lagos", country: "Nigeria" },
+      { name: "Lyon", country: "France" },
+    ],
+    groupField: "country",
+  });
+
+  is(
+    Object.keys(results.groups).join(","),
+    "France,Nigeria",
+    `worker should have returned the expected result in ${context}`
+  );
+
+  URL.revokeObjectURL(WORKER_URL);
+
+  const fn = workerify(x => x * x);
+  is(await fn(5), 25, `workerify works in ${context}`);
+  fn.destroy();
+
+  worker.destroy();
+}
+
+async function testTransfer() {
+  Services.prefs.setBoolPref(
+    "security.allow_parent_unrestricted_js_loads",
+    true
+  );
+  const { workerify } = ChromeUtils.import(
+    "resource://devtools/shared/worker/worker.js"
+  );
+  const workerFn = workerify(({ buf }) => buf.byteLength);
+  const buf = new ArrayBuffer(BUFFER_SIZE);
+
+  is(
+    buf.byteLength,
+    BUFFER_SIZE,
+    "Size of the buffer before transfer is correct."
+  );
+
+  is(await workerFn({ buf }), 8, "Sent array buffer to worker");
+  is(buf.byteLength, 8, "Array buffer was copied, not transferred.");
+
+  is(await workerFn({ buf }, [buf]), 8, "Sent array buffer to worker");
+  is(buf.byteLength, 0, "Array buffer was transferred, not copied.");
+
+  workerFn.destroy();
+}