Merge bitcoin/bitcoin#29470: test: Add option to skip python unit tests

5f240ab test: Add option to skip unit tests for the test runner (Martin Zumsande)

Pull request description:

  In the python `test_runner`, it's possible to disable specific functional tests (or just enable a few specific ones), but the unit tests for the python test framework cannot be skipped.
  Add this option (`--skipunit` or `-u`), it would save some time for devs not interested in running those every time.

ACKs for top commit:
  fjahr:
    re-ACK 5f240ab
  tdb3:
    Code review and tested ACK 5f240ab
  stratospher:
    tested ACK 5f240ab.

Tree-SHA512: f7c9cfefc18a6510e24ca4601309b40fdf4180a4c5fe592be9cf7607be6541784b283c46c8d6e60740ff3eba83025dd5d0db36e55bf8bad1404b38120859e113

Author: fanquake

test/functional/test_runner.py

@@ -434,6 +434,8 @@ def main():
     parser.add_argument('--tmpdirprefix', '-t', default=tempfile.gettempdir(), help="Root directory for datadirs")
     parser.add_argument('--failfast', '-F', action='store_true', help='stop execution after the first test failure')
     parser.add_argument('--filter', help='filter scripts to run by regular expression')
+    parser.add_argument('--skipunit', '-u', action='store_true', help='skip unit tests for the test framework')
+
 
     args, unknown_args = parser.parse_known_args()
     if not args.ansi:
@@ -544,9 +546,10 @@ def main():
         combined_logs_len=args.combinedlogslen,
         failfast=args.failfast,
         use_term_control=args.ansi,
+        skipunit=args.skipunit,
     )
 
-def run_tests(*, test_list, src_dir, build_dir, tmpdir, jobs=1, enable_coverage=False, args=None, combined_logs_len=0, failfast=False, use_term_control):
+def run_tests(*, test_list, src_dir, build_dir, tmpdir, jobs=1, enable_coverage=False, args=None, combined_logs_len=0, failfast=False, use_term_control, skipunit=False):
     args = args or []
 
     # Warn if bitcoind is already running
@@ -563,20 +566,20 @@ def run_tests(*, test_list, src_dir, build_dir, tmpdir, jobs=1, enable_coverage=
     if os.path.isdir(cache_dir):
         print("%sWARNING!%s There is a cache directory here: %s. If tests fail unexpectedly, try deleting the cache directory." % (BOLD[1], BOLD[0], cache_dir))
 
-    # Test Framework Tests
-    print("Running Unit Tests for Test Framework Modules")
 
     tests_dir = src_dir + '/test/functional/'
     # This allows `test_runner.py` to work from an out-of-source build directory using a symlink,
     # a hard link or a copy on any platform. See https://github.com/bitcoin/bitcoin/pull/27561.
     sys.path.append(tests_dir)
 
-    test_framework_tests = unittest.TestSuite()
-    for module in TEST_FRAMEWORK_MODULES:
-        test_framework_tests.addTest(unittest.TestLoader().loadTestsFromName("test_framework.{}".format(module)))
-    result = unittest.TextTestRunner(verbosity=1, failfast=True).run(test_framework_tests)
-    if not result.wasSuccessful():
-        sys.exit("Early exiting after failure in TestFramework unit tests")
+    if not skipunit:
+        print("Running Unit Tests for Test Framework Modules")
+        test_framework_tests = unittest.TestSuite()
+        for module in TEST_FRAMEWORK_MODULES:
+            test_framework_tests.addTest(unittest.TestLoader().loadTestsFromName("test_framework.{}".format(module)))
+        result = unittest.TextTestRunner(verbosity=1, failfast=True).run(test_framework_tests)
+        if not result.wasSuccessful():
+            sys.exit("Early exiting after failure in TestFramework unit tests")
 
     flags = ['--cachedir={}'.format(cache_dir)] + args