On 07/11/2025 02.49, Akihiko Odaki wrote:
On 2025/11/06 15:30, Thomas Huth wrote:
On 06/11/2025 03.34, Akihiko Odaki wrote:
On 2025/11/05 21:09, Thomas Huth wrote:
From: Thomas Huth <[email protected]>

Use the recommended order for import statements, specify the kind of
exceptions that we try to catch, use f-strings where it makes sense,
rewrite the vug_log_file part with a proper "with" statement and
fix some FIXMEs by checking for the availability of the devices, etc.

Signed-off-by: Thomas Huth <[email protected]>
---
  tests/functional/x86_64/test_virtio_gpu.py | 46 +++++++++++-----------
  1 file changed, 23 insertions(+), 23 deletions(-)

diff --git a/tests/functional/x86_64/test_virtio_gpu.py b/tests/ functional/x86_64/test_virtio_gpu.py
index be96de24da2..a25f15cdb00 100755
--- a/tests/functional/x86_64/test_virtio_gpu.py
+++ b/tests/functional/x86_64/test_virtio_gpu.py
@@ -5,22 +5,23 @@
  # This work is licensed under the terms of the GNU GPL, version 2 or
  # later.  See the COPYING file in the top-level directory.
+import os
+import socket
+import subprocess
  from qemu_test import QemuSystemTest, Asset
  from qemu_test import wait_for_console_pattern
  from qemu_test import exec_command_and_wait_for_pattern
  from qemu_test import is_readable_executable_file
-
-import os
-import socket
-import subprocess
+from qemu.machine.machine import VMLaunchFailure
  def pick_default_vug_bin(test):
      bld_dir_path = test.build_file("contrib", "vhost-user-gpu", "vhost- user-gpu")
      if is_readable_executable_file(bld_dir_path):
          return bld_dir_path
+    return None
  class VirtioGPUx86(QemuSystemTest):
@@ -46,8 +47,8 @@ def wait_for_console_pattern(self, success_message, vm=None):
          )
      def test_virtio_vga_virgl(self):
-        # FIXME: should check presence of virtio, virgl etc
          self.require_accelerator('kvm')
+        self.require_device('virtio-vga-gl')
          kernel_path = self.ASSET_KERNEL.fetch()
          initrd_path = self.ASSET_INITRD.fetch()
@@ -68,7 +69,7 @@ def test_virtio_vga_virgl(self):
          )
          try:
              self.vm.launch()
-        except:
+        except VMLaunchFailure:
              # TODO: probably fails because we are missing the VirGL features
              self.skipTest("VirGL not enabled?")
@@ -78,8 +79,8 @@ def test_virtio_vga_virgl(self):
          )
      def test_vhost_user_vga_virgl(self):
-        # FIXME: should check presence of vhost-user-gpu, virgl, memfd etc
          self.require_accelerator('kvm')
+        self.require_device('vhost-user-vga')
          vug = pick_default_vug_bin(self)
          if not vug:
@@ -95,27 +96,26 @@ def test_vhost_user_vga_virgl(self):
          os.set_inheritable(qemu_sock.fileno(), True)
          os.set_inheritable(vug_sock.fileno(), True)
-        self._vug_log_path = self.log_file("vhost-user-gpu.log")
-        self._vug_log_file = open(self._vug_log_path, "wb")
-        self.log.info('Complete vhost-user-gpu.log file can be '
-                      'found at %s', self._vug_log_path)
-
-        vugp = subprocess.Popen(
-            [vug, "--virgl", "--fd=%d" % vug_sock.fileno()],
-            stdin=subprocess.DEVNULL,
-            stdout=self._vug_log_file,
-            stderr=subprocess.STDOUT,
-            shell=False,
-            close_fds=False,
-        )
-        self._vug_log_file.close()
+        vug_log_path = self.log_file("vhost-user-gpu.log")
+        self.log.info('Complete vhost-user-gpu.log file can be found at %s',
+                      vug_log_path)
+        with open(vug_log_path, "wb") as vug_log_file:
+            # pylint: disable=consider-using-with
+            vugp = subprocess.Popen(
+                [vug, "--virgl", f"--fd={vug_sock.fileno()}"],
+                stdin=subprocess.DEVNULL,
+                stdout=vug_log_file,
+                stderr=subprocess.STDOUT,
+                shell=False,
+                close_fds=False,
+            )

Let's use with for subproces.Popen() too.

You may leave vug_log_file.close() after subprocess.Popen(); if subprocess.Popen() raises an exception, the with statement for vug_log_file will close the file. Otherwise, the vug_log_file.close() after subprocess.Popen() will close it and the with statement for vug_log_file will be no-op; the documentation says it is allowed to call IOBase.call() twice:
https://docs.python.org/3.14/library/io.html#io.IOBase.close

Not quite sure whether I got your point, but the "vugp" variable is still used later in the function to terminate the subprocess manually. So if we really want to use a "when" here, I guess I have to move the whole remaining part of this function into the "when" block, don't I? Is that what you are suggesting?

I suppose you meant "with" instead of "when"; if so, yes, that's what I meant.

D'oh, of course I meant "with", not "when" ... must have been too tired yesterday to type properly, sorry!

 Thomas


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