Test the "--managed-save" option

When the VM have a managedsave file, it can not be undefined without the
"--managed-save" option. This option can remove the managedsave file and
then undefine the VM.

libvirt/tests/cfg/virsh_cmd/domain/virsh_managedsave_undefine.cfg

@@ -0,0 +1,3 @@
+- virsh.managedsave_undefine:
+    type = "virsh_managedsave_undefine"
+    start_vm = "yes"

libvirt/tests/src/virsh_cmd/domain/virsh_managedsave_undefine.py

@@ -0,0 +1,58 @@
+import os
+import logging
+from virttest import virsh
+from virttest.libvirt_xml import vm_xml
+
+VIRSH_ARGS = {'debug': True, 'ignore_status': False}
+LOG = logging.getLogger('avocado.' + __name__)
+
+
+def run(test, params, env):
+    """
+    Test option: --managed-save
+
+    Undefine a vm with or without --managed-save option
+    1. start a vm, and do managedsave
+    2. try to undefine the vm without "--managed-save" option, it should fail
+    3. try to undefine the vm with "--managed-save" option, it succeeds
+    """
+
+    def vm_undefine_check(vm_name):
+        """
+        Check if vm can be undefined with manage-save option
+        """
+        if not os.path.exists(managed_save_file):
+            test.fail("Can't find managed save image")
+        LOG.info("Step2: Undefine the VM without --managed-save option")
+        ret = virsh.undefine(vm_name, options='--nvram', ignore_status=True)
+        LOG.debug("%s", ret)
+        if not ret.exit_status:
+            test.fail("Guest shouldn't be undefined"
+                      "while domain managed save image exists")
+        LOG.info("Step3: Undefine the VM with --managed-save option")
+        ret1 = virsh.undefine(vm_name, options="--managed-save --nvram",
+                              ignore_status=True)
+        LOG.debug("%s", ret1)
+        if ret1.exit_status:
+            test.fail("Guest can't be undefine with "
+                      "managed-save option")
+
+        if os.path.exists(managed_save_file):
+            test.fail("Managed save image exists after undefining vm")
+        # restore and start the vm
+        bk_xml.define()
+        vm.start()
+
+    vm_name = params.get('main_vm')
+    managed_save_file = "/var/lib/libvirt/qemu/save/%s.save" % vm_name
+    vmxml = vm_xml.VMXML.new_from_inactive_dumpxml(vm_name)
+    bk_xml = vmxml.copy()
+    try:
+        vm = env.get_vm(vm_name)
+        LOG.info("Step1: start the VM and do managedsave")
+        if not vm.is_alive:
+            vm.start()
+        virsh.managedsave(vm_name, **VIRSH_ARGS)
+        vm_undefine_check(vm_name)
+    finally:
+        bk_xml.sync()