tests: Add luks creation examples to storagevolxml2argvtest

Add the storagevolxml2xmltest "luks" and "luks-cipher" tests
to the storagevolxml2argvtest.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>
ACKed-by: NMichal Privoznik <mprivozn@redhat.com>

tests/storagevolxml2argvdata/luks-cipher.argv

+qemu-img create -f luks \
+--object secret,id=LuksDemo.img_encrypt0,file=/path/to/secretFile \
+-o key-secret=LuksDemo.img_encrypt0,cipher-alg=serpent-256,cipher-mode=cbc,\
+hash-alg=sha256,ivgen-alg=plain64,ivgen-hash-alg=sha256 \
+/var/lib/libvirt/images/LuksDemo.img 5242880K

tests/storagevolxml2argvdata/luks.argv

+qemu-img create -f luks \
+--object secret,id=LuksDemo.img_encrypt0,file=/path/to/secretFile \
+-o key-secret=LuksDemo.img_encrypt0 \
+/var/lib/libvirt/images/LuksDemo.img 5242880K

tests/storagevolxml2argvtest.c

@@ -232,6 +232,13 @@ mymain(void)
             "pool-dir", "vol-file-iso",
             "iso-input", 0);
 
+    DO_TEST("pool-dir", "vol-luks",
+            NULL, NULL,
+            "luks", 0);
+    DO_TEST("pool-dir", "vol-luks-cipher",
+            NULL, NULL,
+            "luks-cipher", 0);
+
     return ret == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
 }