qemuxml2argv: Mock virSCSIDeviceGetSgName

When constructing SCSI hostdev command line for qemu, the
/sys/bus/scsi/devices/... dir is scanned. Unfortunately, even in
the tests. This is needed to determine the name of SCSI device to
passthrough to qemu, because in the domain XML we were given its
address instead. Anyway, we should not be touching live system
data in our test suite as it produced unpredictable results. The
test is regressing from 1e9a0837 on.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

tests/qemuxml2argvmock.c

@@ -26,6 +26,7 @@
 #include "virutil.h"
 #include "virstring.h"
 #include "virtpm.h"
+#include "virscsi.h"
 #include <time.h>
 #include <unistd.h>
 
@@ -84,3 +85,16 @@ virMemoryMaxValue(bool capped ATTRIBUTE_UNUSED)
 {
     return LLONG_MAX;
 }
+
+char *
+virSCSIDeviceGetSgName(const char *sysfs_prefix ATTRIBUTE_UNUSED,
+                       const char *adapter ATTRIBUTE_UNUSED,
+                       unsigned int bus ATTRIBUTE_UNUSED,
+                       unsigned int target ATTRIBUTE_UNUSED,
+                       unsigned long long unit ATTRIBUTE_UNUSED)
+{
+    char *ret;
+
+    ignore_value(VIR_STRDUP(ret, "sg0"));
+    return ret;
+}