[PATCH 5/6] tests/avocado: Do not run tests that require libslirp if it is not available

[Thomas Huth <thuth@redhat.com>]

Some avocado tests blindly assume that QEMU has been compiled with libslirp
enabled and fail badly if it is missing. Add a proper check to cancel the
tests in this case.

Signed-off-by: Thomas Huth <thuth@redhat.com>
---
 tests/avocado/avocado_qemu/__init__.py | 7 +++++++
 tests/avocado/info_usernet.py          | 1 +
 tests/avocado/replay_linux.py          | 1 +
 3 files changed, 9 insertions(+)

diff --git a/tests/avocado/avocado_qemu/__init__.py b/tests/avocado/avocado_qemu/__init__.py
index ed4853c805..5ebf5c1766 100644
--- a/tests/avocado/avocado_qemu/__init__.py
+++ b/tests/avocado/avocado_qemu/__init__.py
@@ -295,6 +295,12 @@ def require_accelerator(self, accelerator):
             self.cancel("%s accelerator does not seem to be "
                         "available" % accelerator)
 
+    def require_netdev(self, netdevname):
+        netdevhelp = run_cmd([self.qemu_bin,
+                             '-M', 'none', '-netdev', 'help'])[0];
+        if netdevhelp.find('\n' + netdevname + '\n') < 0:
+            self.cancel('no support for user networking')
+
     def _new_vm(self, name, *args):
         self._sd = tempfile.TemporaryDirectory(prefix="avo_qemu_sock_")
         vm = QEMUMachine(self.qemu_bin, base_temp_dir=self.workdir,
@@ -547,6 +553,7 @@ def _set_distro(self):
 
     def setUp(self, ssh_pubkey=None, network_device_type='virtio-net'):
         super().setUp()
+        self.require_netdev('user')
         self._set_distro()
         self.vm.add_args('-smp', self.smp)
         self.vm.add_args('-m', self.memory)
diff --git a/tests/avocado/info_usernet.py b/tests/avocado/info_usernet.py
index dc01f74150..b862a47dba 100644
--- a/tests/avocado/info_usernet.py
+++ b/tests/avocado/info_usernet.py
@@ -16,6 +16,7 @@
 class InfoUsernet(QemuSystemTest):
 
     def test_hostfwd(self):
+        self.require_netdev('user')
         self.vm.add_args('-netdev', 'user,id=vnet,hostfwd=:127.0.0.1:0-:22')
         self.vm.launch()
         res = self.vm.command('human-monitor-command',
diff --git a/tests/avocado/replay_linux.py b/tests/avocado/replay_linux.py
index e1f9981a34..a76dd507fc 100644
--- a/tests/avocado/replay_linux.py
+++ b/tests/avocado/replay_linux.py
@@ -55,6 +55,7 @@ def vm_add_disk(self, vm, path, id, device):
             '%s,drive=disk%s-rr%s' % (device, id, bus_string))
 
     def launch_and_wait(self, record, args, shift):
+        self.require_netdev('user')
         vm = self.get_vm()
         vm.add_args('-smp', '1')
         vm.add_args('-m', '1024')
-- 
2.31.1