[PATCH v3 4/4] tests/functional: add -k TEST_NAME_PATTERN CLI arg

[Manos Pitsidianakis <manos.pitsidianakis@linaro.org>]

Add a CLI argument that takes fnmatch(3)-style patterns as value and can
be specified many times. Only tests that match the pattern will be
executed. This argument is passed to unittest.main which takes the same
argument.

Acked-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
---
 tests/functional/qemu_test/testcase.py | 23 +++++++++++++++++++++--
 1 file changed, 21 insertions(+), 2 deletions(-)

diff --git a/tests/functional/qemu_test/testcase.py b/tests/functional/qemu_test/testcase.py
index ab564f873c303bcc28c3bf7bec8c8c4569fae91c..b045d82caa79d9d161fb868b0b0748ad7de453d9 100644
--- a/tests/functional/qemu_test/testcase.py
+++ b/tests/functional/qemu_test/testcase.py
@@ -16,6 +16,7 @@
 import os
 from pathlib import Path
 import pycotap
+import itertools
 import shutil
 from subprocess import run
 import sys
@@ -37,6 +38,7 @@ class QemuBaseTest(unittest.TestCase):
     debug: bool = False
     keep_scratch: bool = "QEMU_TEST_KEEP_SCRATCH" in os.environ
     list_tests: bool = False
+    test_name_patterns: list[str] = []
 
     """
     Class method that initializes class attributes from given command-line
@@ -67,10 +69,19 @@ def parse_args():
             action="store_true",
             help="List all tests that would be executed and exit.",
         )
+        parser.add_argument(
+            "-k",
+            dest="test_name_patterns",
+            action="append",
+            type=str,
+            help="Only run tests which match the given substring. "
+            "This argument is passed to unittest.main verbatim.",
+        )
         args = parser.parse_args()
         QemuBaseTest.debug = args.debug
         QemuBaseTest.keep_scratch |= args.keep_scratch
         QemuBaseTest.list_tests = args.list_tests
+        QemuBaseTest.test_name_patterns = args.test_name_patterns
         return
 
     '''
@@ -313,8 +324,16 @@ def main():
 
         tr = pycotap.TAPTestRunner(message_log = pycotap.LogMode.LogToError,
                                    test_output_log = pycotap.LogMode.LogToError)
-        res = unittest.main(module = None, testRunner = tr, exit = False,
-                            argv=["__dummy__", path])
+        argv = ["__dummy__", path] + (
+            list(
+                itertools.chain.from_iterable(
+                    ["-k", x] for x in QemuBaseTest.test_name_patterns
+                )
+            )
+            if QemuBaseTest.test_name_patterns
+            else []
+        )
+        res = unittest.main(module=None, testRunner=tr, exit=False, argv=argv)
         for (test, message) in res.result.errors + res.result.failures:
 
             if hasattr(test, "log_filename"):

-- 
2.47.2