test: Ensure pytest-timeout is available and skip qemu_nb_test on centos

- Skip test_block_device on CentOS due to the use pwrite_zeroes_alignment patch not being included on qemu-img, see https://gitlab.com/qemu-project/qemu/-/commit/d704a13d2c025779bc91d04e127427347ddcf3b3 for more information.
- Ensure pytest-timeout is available during bench to avoid possible dependency errors.

Signed-off-by: Jasper Berton <jasper.berton@team.blue>

Author: JasperB-TeamBlue

test/qemu_nbd_test.py

@@ -482,6 +482,10 @@ def test_block_signals(tmpdir):
         assert s.wait(0.2) is not None
 
 
+@pytest.mark.skipif(
+    testutil.is_centos_9_or_10,
+    reason="Skip until patch for qemu-img due to using pwrite_zeroes_alignment when writing first sector is also in CentOS.",
+)
 @pytest.mark.parametrize("fmt", ["raw", "qcow2"])
 def test_block_device(tmpdir, user_block, fmt):
     qemu_img.create(user_block.path, fmt, size=1024**3)

test/testutil.py

@@ -68,3 +68,12 @@ def ipv6_enabled():
     out = subprocess.check_output(["ip", "-6", "-j", "addr"])
     addresses = json.loads(out)
     return len(addresses) > 0
+
+
+def is_centos_9_or_10():
+    try:
+        with open("/etc/os-release") as f:
+            content = f.read()
+            return ("ID=\"centos\"" in content or "ID=centos" in content)
+    except OSError:
+        return False

tox.ini

@@ -19,8 +19,8 @@ deps =
     test,bench: pytest
     test,bench: userstorage>=0.5.3
     test,bench: setuptools>=68.2.2
+    test,bench: pytest-timeout
     test: pytest-cov
-    test: pytest-timeout
 commands_pre =
     # Since Python 3.12, setuptools is not installed by default.
     pip install setuptools>=68.2.2