1 files changed, 51 insertions, 0 deletions
diff --git a/toolkit/components/webextensions/test/xpcshell/test_ext_runtime_sendMessage_self.js b/toolkit/components/webextensions/test/xpcshell/test_ext_runtime_sendMessage_self.js
new file mode 100644
index 000000000..e4f5e951f
--- /dev/null
+++ b/toolkit/components/webextensions/test/xpcshell/test_ext_runtime_sendMessage_self.js
@@ -0,0 +1,51 @@
+/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set sts=2 sw=2 et tw=80: */
+
+"use strict";
+
+add_task(function* test_sendMessage_to_self_should_not_trigger_onMessage() {
+  async function background() {
+    browser.runtime.onMessage.addListener(msg => {
+      browser.test.assertEq("msg from child", msg);
+      browser.test.notifyPass("sendMessage did not call same-frame onMessage");
+    });
+
+    browser.test.onMessage.addListener(msg => {
+      browser.test.assertEq("sendMessage with a listener in another frame", msg);
+      browser.runtime.sendMessage("should only reach another frame");
+    });
+
+    await browser.test.assertRejects(
+      browser.runtime.sendMessage("should not trigger same-frame onMessage"),
+      "Could not establish connection. Receiving end does not exist.");
+
+    let anotherFrame = document.createElement("iframe");
+    anotherFrame.src = browser.extension.getURL("extensionpage.html");
+    document.body.appendChild(anotherFrame);
+  }
+
+  function lastScript() {
+    browser.runtime.onMessage.addListener(msg => {
+      browser.test.assertEq("should only reach another frame", msg);
+      browser.runtime.sendMessage("msg from child");
+    });
+    browser.test.sendMessage("sendMessage callback called");
+  }
+
+  let extensionData = {
+    background,
+    files: {
+      "lastScript.js": lastScript,
+      "extensionpage.html": `<!DOCTYPE html><meta charset="utf-8"><script src="lastScript.js"></script>`,
+    },
+  };
+
+  let extension = ExtensionTestUtils.loadExtension(extensionData);
+  yield extension.startup();
+
+  yield extension.awaitMessage("sendMessage callback called");
+  extension.sendMessage("sendMessage with a listener in another frame");
+  yield extension.awaitFinish("sendMessage did not call same-frame onMessage");
+
+  yield extension.unload();
+});