1 files changed, 50 insertions, 0 deletions
diff --git a/devtools/server/tests/xpcshell/test_nesting-03.js b/devtools/server/tests/xpcshell/test_nesting-03.js
new file mode 100644
index 0000000000..0a64e751cd
--- /dev/null
+++ b/devtools/server/tests/xpcshell/test_nesting-03.js
@@ -0,0 +1,50 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Test that we can detect nested event loops in tabs with the same URL.
+
+add_task(async function () {
+  const GLOBAL_NAME = "test-nesting1";
+
+  initTestDevToolsServer();
+  addTestGlobal(GLOBAL_NAME);
+  addTestGlobal(GLOBAL_NAME);
+
+  // Connect two thread actors, debugging the same debuggee, and both being paused.
+  const firstClient = new DevToolsClient(DevToolsServer.connectPipe());
+  await firstClient.connect();
+  const { threadFront: firstThreadFront } = await attachTestThread(
+    firstClient,
+    GLOBAL_NAME
+  );
+  await firstThreadFront.interrupt();
+
+  const secondClient = new DevToolsClient(DevToolsServer.connectPipe());
+  await secondClient.connect();
+  const { threadFront: secondThreadFront } = await attachTestThread(
+    secondClient,
+    GLOBAL_NAME
+  );
+  await secondThreadFront.interrupt();
+
+  // Then check how concurrent resume work
+  let result;
+  try {
+    result = await firstThreadFront.resume();
+  } catch (e) {
+    Assert.ok(e.includes("wrongOrder"), "rejects with the wrong order");
+  }
+  Assert.ok(!result, "no response");
+
+  result = await secondThreadFront.resume();
+  Assert.ok(true, "resumed as expected");
+
+  await firstThreadFront.resume();
+
+  Assert.ok(true, "resumed as expected");
+  await firstClient.close();
+
+  await finishClient(secondClient);
+});