1 files changed, 69 insertions, 0 deletions
diff --git a/toolkit/components/extensions/test/xpcshell/test_ext_runtime_ports.js b/toolkit/components/extensions/test/xpcshell/test_ext_runtime_ports.js
new file mode 100644
index 0000000000..7365a13f93
--- /dev/null
+++ b/toolkit/components/extensions/test/xpcshell/test_ext_runtime_ports.js
@@ -0,0 +1,69 @@
+"use strict";
+
+add_task(async function test_port_disconnected_from_wrong_window() {
+  let extensionData = {
+    background() {
+      let num = 0;
+      let ports = {};
+      let done = false;
+
+      browser.runtime.onConnect.addListener(port => {
+        num++;
+        ports[num] = port;
+
+        port.onMessage.addListener(msg => {
+          browser.test.assertEq(msg, "port-2-response", "Got port 2 response");
+          browser.test.sendMessage(msg + "-received");
+          done = true;
+        });
+
+        port.onDisconnect.addListener(err => {
+          if (port === ports[1]) {
+            browser.test.log("Port 1 disconnected, sending message via port 2");
+            ports[2].postMessage("port-2-msg");
+          } else {
+            browser.test.assertTrue(
+              done,
+              "Port 2 disconnected only after a full roundtrip received"
+            );
+          }
+        });
+
+        browser.test.sendMessage("port-connect-" + num);
+      });
+    },
+    files: {
+      "page.html": `
+        <!DOCTYPE html><meta charset="utf8">
+        <script src="script.js"></script>
+      `,
+      "script.js"() {
+        let port = browser.runtime.connect();
+        port.onMessage.addListener(msg => {
+          browser.test.assertEq(msg, "port-2-msg", "Got message via port 2");
+          port.postMessage("port-2-response");
+        });
+      },
+    },
+  };
+
+  let extension = ExtensionTestUtils.loadExtension(extensionData);
+  let url = `moz-extension://${extension.uuid}/page.html`;
+  await extension.startup();
+
+  let page1 = await ExtensionTestUtils.loadContentPage(url, { extension });
+  await extension.awaitMessage("port-connect-1");
+  info("First page opened port 1");
+
+  let page2 = await ExtensionTestUtils.loadContentPage(url, { extension });
+  await extension.awaitMessage("port-connect-2");
+  info("Second page opened port 2");
+
+  info("Closing the first page should not close port 2");
+  await page1.close();
+  await extension.awaitMessage("port-2-response-received");
+  info("Roundtrip message through port 2 received");
+
+  await page2.close();
+  await extension.unload();
+});