import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

devtools/shared/worker/tests/browser/browser_worker-03.js

@@ -0,0 +1,52 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Tests that the devtools/shared/worker can handle:
+// returned primitives (or promise or Error)
+//
+// And tests `workerify` by doing so.
+
+const { DevToolsWorker, workerify } = require("devtools/shared/worker/worker");
+function square(x) {
+  return x * x;
+}
+
+function squarePromise(x) {
+  return new Promise((resolve) => resolve(x * x));
+}
+
+function squareError(x) {
+  return new Error("Nope");
+}
+
+function squarePromiseReject(x) {
+  return new Promise((_, reject) => reject("Nope"));
+}
+
+add_task(function* () {
+  let fn = workerify(square);
+  is((yield fn(5)), 25, "return primitives successful");
+  fn.destroy();
+
+  fn = workerify(squarePromise);
+  is((yield fn(5)), 25, "promise primitives successful");
+  fn.destroy();
+
+  fn = workerify(squareError);
+  try {
+    yield fn(5);
+    ok(false, "return error should reject");
+  } catch (e) {
+    ok(true, "return error should reject");
+  }
+  fn.destroy();
+
+  fn = workerify(squarePromiseReject);
+  try {
+    yield fn(5);
+    ok(false, "returned rejected promise rejects");
+  } catch (e) {
+    ok(true, "returned rejected promise rejects");
+  }
+  fn.destroy();
+});