diff -r 000000000000 -r 6474c204b198 ipc/ipdl/test/cxx/TestMultiMgrs.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ipc/ipdl/test/cxx/TestMultiMgrs.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,103 @@
+#include "TestMultiMgrs.h"
+
+#include "IPDLUnitTests.h"      // fail etc.
+
+namespace mozilla {
+namespace _ipdltest {
+
+//-----------------------------------------------------------------------------
+// parent
+
+void
+TestMultiMgrsParent::Main()
+{
+    TestMultiMgrsLeftParent* leftie = new TestMultiMgrsLeftParent();
+    if (!SendPTestMultiMgrsLeftConstructor(leftie))
+        fail("error sending ctor");
+
+    TestMultiMgrsRightParent* rightie = new TestMultiMgrsRightParent();
+    if (!SendPTestMultiMgrsRightConstructor(rightie))
+        fail("error sending ctor");
+
+    TestMultiMgrsBottomParent* bottomL = new TestMultiMgrsBottomParent();
+    if (!leftie->SendPTestMultiMgrsBottomConstructor(bottomL))
+        fail("error sending ctor");
+
+    TestMultiMgrsBottomParent* bottomR = new TestMultiMgrsBottomParent();
+    if (!rightie->SendPTestMultiMgrsBottomConstructor(bottomR))
+        fail("error sending ctor");
+
+    if (!leftie->HasChild(bottomL))
+        fail("leftie didn't have a child it was supposed to!");
+    if (leftie->HasChild(bottomR))
+        fail("leftie had rightie's child!");
+
+    if (!rightie->HasChild(bottomR))
+        fail("rightie didn't have a child it was supposed to!");
+    if (rightie->HasChild(bottomL))
+        fail("rightie had rightie's child!");
+
+    if (!SendCheck())
+        fail("couldn't kick off the child-side check");
+}
+
+bool
+TestMultiMgrsParent::RecvOK()
+{
+    Close();
+    return true;
+}
+
+//-----------------------------------------------------------------------------
+// child
+
+bool
+TestMultiMgrsLeftChild::RecvPTestMultiMgrsBottomConstructor(
+    PTestMultiMgrsBottomChild* actor)
+{
+    static_cast<TestMultiMgrsChild*>(Manager())->mBottomL = actor;
+    return true;
+}
+
+bool
+TestMultiMgrsRightChild::RecvPTestMultiMgrsBottomConstructor(
+    PTestMultiMgrsBottomChild* actor)
+{
+    static_cast<TestMultiMgrsChild*>(Manager())->mBottomR = actor;
+    return true;
+}
+
+bool
+TestMultiMgrsChild::RecvCheck()
+{
+    if (1 != ManagedPTestMultiMgrsLeftChild().Length())
+        fail("where's leftie?");
+    if (1 != ManagedPTestMultiMgrsRightChild().Length())
+        fail("where's rightie?");
+
+    TestMultiMgrsLeftChild* leftie =
+        static_cast<TestMultiMgrsLeftChild*>(
+            ManagedPTestMultiMgrsLeftChild()[0]);
+    TestMultiMgrsRightChild* rightie =
+        static_cast<TestMultiMgrsRightChild*>(
+            ManagedPTestMultiMgrsRightChild()[0]);
+
+    if (!leftie->HasChild(mBottomL))
+        fail("leftie didn't have a child it was supposed to!");
+    if (leftie->HasChild(mBottomR))
+        fail("leftie had rightie's child!");
+
+    if (!rightie->HasChild(mBottomR))
+        fail("rightie didn't have a child it was supposed to!");
+    if (rightie->HasChild(mBottomL))
+        fail("rightie had leftie's child!");
+
+    if (!SendOK())
+        fail("couldn't send OK()");
+
+    return true;
+}
+
+
+} // namespace _ipdltest
+} // namespace mozilla