tests/hmp: test "none" machine with memory

and add a test case of dump-guest-memory without
"[begin length]" parameters.

Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Message-Id: <20170913142036.2469-5-lvivier@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>

tests/test-hmp.c

@@ -35,6 +35,7 @@ static const char *hmp_cmds[] = {
     "mouse_button 0",
     "device_del mouse1",
     "dump-guest-memory /dev/null 0 4096",
+    "dump-guest-memory /dev/null",
     "gdbserver",
     "host_net_add user id=net0",
     "hostfwd_add tcp::43210-:43210",
@@ -159,5 +160,8 @@ int main(int argc, char **argv)
 
     qtest_cb_for_every_machine(add_machine_test_case);
 
+    /* as none machine has no memory by default, add a test case with memory */
+    qtest_add_data_func("hmp/none+2MB", g_strdup("none -m 2"), test_machine);
+
     return g_test_run();
 }