tests: add one -device video device testcase

The testcase is for testing non-fixed PCI address for primary
video device and using video args to -deivce qemu option.

tests/qemuxml2argvdata/qemuxml2argv-video-device-pciaddr-default.args

+LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test QEMU_AUDIO_DRV=none \
+/usr/bin/qemu -S -M pc-0.15 -m 1024 -smp 1 -nodefaults \
+-monitor unix:/tmp/test-monitor,server,nowait -no-acpi -boot c \
+-usb \
+-hda /var/lib/libvirt/images/QEMUGuest1 -vnc 127.0.0.1:-5900 \
+-device qxl-vga,id=video0,vram_size=67108864,bus=pci.0,addr=0x3 \
+-device qxl,id=video1,vram_size=67108864,bus=pci.0,addr=0x4 \
+-device qxl,id=video2,vram_size=67108864,bus=pci.0,addr=0x5 \
+-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x2

tests/qemuxml2argvdata/qemuxml2argv-video-device-pciaddr-default.xml

+<domain type='kvm'>
+  <name>QEMUGuest1</name>
+  <uuid>cdbebdfa-1d6d-65c3-be0f-fd74b978a773</uuid>
+  <memory unit='KiB'>1048576</memory>
+  <currentMemory unit='KiB'>1048576</currentMemory>
+  <vcpu placement='static'>1</vcpu>
+  <os>
+    <type arch='x86_64' machine='pc-0.15'>hvm</type>
+    <boot dev='hd'/>
+  </os>
+  <clock offset='utc'/>
+  <on_poweroff>destroy</on_poweroff>
+  <on_reboot>restart</on_reboot>
+  <on_crash>restart</on_crash>
+  <devices>
+    <emulator>/usr/bin/qemu</emulator>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='none'/>
+      <source file='/var/lib/libvirt/images/QEMUGuest1'/>
+      <target dev='hda' bus='ide'/>
+      <address type='drive' controller='0' bus='0' target='0' unit='0'/>
+    </disk>
+    <controller type='usb' index='0'>
+    </controller>
+    <controller type='ide' index='0'>
+    </controller>
+    <input type='mouse' bus='ps2'/>
+    <graphics type='vnc' port='5900' autoport='yes' listen='127.0.0.1'>
+      <listen type='address' address='127.0.0.1'/>
+    </graphics>
+    <video>
+      <model type='qxl' vram='65536' heads='1'/>
+    </video>
+    <video>
+      <model type='qxl' vram='65536' heads='1' primary='yes'/>
+    </video>
+    <video>
+      <model type='qxl' vram='65536' heads='1'/>
+    </video>
+    <memballoon model='virtio'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
+    </memballoon>
+  </devices>
+</domain>

tests/qemuxml2argvtest.c

@@ -869,6 +869,11 @@ mymain(void)
             QEMU_CAPS_DRIVE, QEMU_CAPS_DEVICE, QEMU_CAPS_NODEFCONFIG,
             QEMU_CAPS_IDE_CD, QEMU_CAPS_BLOCKIO);
 
+    DO_TEST("video-device-pciaddr-default",
+            QEMU_CAPS_KVM, QEMU_CAPS_VNC,
+            QEMU_CAPS_DEVICE, QEMU_CAPS_DEVICE_VIDEO_PRIMARY,
+            QEMU_CAPS_DEVICE_QXL, QEMU_CAPS_DEVICE_QXL_VGA);
+
     VIR_FREE(driver.stateDir);
     virCapabilitiesFree(driver.caps);
     VIR_FREE(map);