1 files changed, 81 insertions, 0 deletions
diff --git a/js/xpconnect/tests/mochitest/shadow_realm_worker.js b/js/xpconnect/tests/mochitest/shadow_realm_worker.js
new file mode 100644
index 0000000000..c91c9bc30c
--- /dev/null
+++ b/js/xpconnect/tests/mochitest/shadow_realm_worker.js
@@ -0,0 +1,81 @@
+
+var sr = new ShadowRealm();
+var resolve;
+
+var allSettled = new Promise((resolved) => { resolve = resolved });
+
+self.onmessage = async function (e) {
+  try {
+    // Test evaluate
+    if (e.data === 'evaluate') {
+      sr.evaluate("var s = 'PASS set string in realm';")
+      var res = sr.evaluate('s');
+      postMessage(res);
+      return;
+    }
+
+    // If Import works in a worker, then it ought to work in a shadow realm
+    //
+    // See  https://bugzilla.mozilla.org/show_bug.cgi?id=1247687 and
+    //      https://bugzilla.mozilla.org/show_bug.cgi?id=1772162
+    if (e.data == 'import') {
+      var import_worked = false;
+      var importValue_worked = false;
+      var importNested_worked = false;
+      try {
+        var module = await import("./shadow_realm_module.js");
+        if (module.x != 1) {
+          throw "mismatch";
+        }
+        import_worked = true;
+      } catch (e) { }
+
+      try {
+        await sr.importValue("./shadow_realm_module.js", 'x').then((x) => {
+          if (x == 1) { importValue_worked = true; }
+        });
+      } catch (e) { }
+
+      try {
+        sr.evaluate(`
+        var imported = false;
+        import("./shadow_realm_module.js").then((module) => {
+          if (module.x == 1) {
+            imported = true;
+          }
+        });
+        true;
+        `);
+
+        importNested_worked = sr.evaluate("imported");
+      } catch (e) {
+
+      }
+
+      if (importValue_worked == importNested_worked) {
+        postMessage(`PASS: import in workers ${
+          import_worked ? "worked" : "failed"
+        }. importValue, and nested import all ${
+          importValue_worked ? "worked" : "failed"
+        } `);
+        resolve();
+        return;
+      }
+
+      postMessage(`FAIL: importValue ${importValue_worked}, import ${import_worked}, importNested ${importNested_worked}`);
+      resolve();
+      return;
+    }
+
+
+    // Reply back with finish
+    if (e.data == 'finish') {
+      await allSettled;
+      postMessage("finish");
+      return;
+    }
+  } catch (e) {
+    postMessage("FAIL: " + e.message);
+  }
+  postMessage('Unknown message type.');
+}