tests: Add storagevol tests for format=iso

Demonstrates the bug fix in commit 0e5db762

tests/storagevolxml2argvdata/iso-input.argv

+qemu-img convert -f raw -O raw /var/lib/libvirt/images/test.iso \
+/var/lib/libvirt/images/sparse.img

tests/storagevolxml2argvdata/iso.argv

+qemu-img create -f raw /var/lib/libvirt/images/test.iso 1024K

tests/storagevolxml2argvtest.c

@@ -272,6 +272,13 @@ mymain(void)
                  "pool-dir", "vol-qcow2-nocapacity-backing", NULL, NULL,
                  "qcow2-nocapacity", 0, FMT_OPTIONS);
 
+    DO_TEST("pool-dir", "vol-file-iso",
+            NULL, NULL,
+            "iso", 0, FMT_OPTIONS);
+    DO_TEST("pool-dir", "vol-file",
+            "pool-dir", "vol-file-iso",
+            "iso-input", 0, FMT_OPTIONS);
+
     return ret == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
 }
 

tests/storagevolxml2xmlin/vol-file-iso.xml

+<volume>
+  <name>test.iso</name>
+  <source/>
+  <capacity unit="MiB">1</capacity>
+  <allocation unit="MiB">1</allocation>
+  <target>
+    <format type='iso'/>
+    <path>/var/lib/libvirt/images/test.iso</path>
+  </target>
+</volume>

tests/storagevolxml2xmlout/vol-file-iso.xml

+<volume type='file'>
+  <name>test.iso</name>
+  <source>
+  </source>
+  <capacity unit='bytes'>1048576</capacity>
+  <allocation unit='bytes'>1048576</allocation>
+  <target>
+    <path>/var/lib/libvirt/images/test.iso</path>
+    <format type='iso'/>
+  </target>
+</volume>

tests/storagevolxml2xmltest.c

@@ -100,6 +100,7 @@ mymain(void)
     DO_TEST("pool-dir", "vol-file");
     DO_TEST("pool-dir", "vol-file-naming");
     DO_TEST("pool-dir", "vol-file-backing");
+    DO_TEST("pool-dir", "vol-file-iso");
     DO_TEST("pool-dir", "vol-qcow2");
     DO_TEST("pool-dir", "vol-qcow2-1.1");
     DO_TEST("pool-dir", "vol-qcow2-lazy");