diff -r 000000000000 -r 6474c204b198 ipc/ipdl/test/cxx/TestSanity.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ipc/ipdl/test/cxx/TestSanity.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,75 @@
+#include "TestSanity.h"
+
+#include "IPDLUnitTests.h"      // fail etc.
+
+namespace mozilla {
+namespace _ipdltest {
+
+//-----------------------------------------------------------------------------
+// parent
+
+TestSanityParent::TestSanityParent()
+{
+    MOZ_COUNT_CTOR(TestSanityParent);
+}
+
+TestSanityParent::~TestSanityParent()
+{
+    MOZ_COUNT_DTOR(TestSanityParent);
+}
+
+void
+TestSanityParent::Main()
+{
+    if (!SendPing(0, 0.5f, 0))
+        fail("sending Ping");
+}
+
+
+bool
+TestSanityParent::RecvPong(const int& one, const float& zeroPtTwoFive,
+                           const uint8_t&/*unused*/)
+{
+    if (1 != one)
+        fail("invalid argument `%d', should have been `1'", one);
+
+    if (0.25f != zeroPtTwoFive)
+        fail("invalid argument `%g', should have been `0.25'", zeroPtTwoFive);
+
+    Close();
+
+    return true;
+}
+
+
+//-----------------------------------------------------------------------------
+// child
+
+TestSanityChild::TestSanityChild()
+{
+    MOZ_COUNT_CTOR(TestSanityChild);
+}
+
+TestSanityChild::~TestSanityChild()
+{
+    MOZ_COUNT_DTOR(TestSanityChild);
+}
+
+bool
+TestSanityChild::RecvPing(const int& zero, const float& zeroPtFive,
+                          const int8_t&/*unused*/)
+{
+    if (0 != zero)
+        fail("invalid argument `%d', should have been `0'", zero);
+
+    if (0.5f != zeroPtFive)
+        fail("invalid argument `%g', should have been `0.5'", zeroPtFive);
+
+    if (!SendPong(1, 0.25f, 0))
+        fail("sending Pong");
+    return true;
+}
+
+
+} // namespace _ipdltest
+} // namespace mozilla