tests: add native TAP protocol support

The nose2 framework is not really adding any value to the whole tests
setup. It even makes it hard to pass on information to Meson's test
framework. Thus replace it with our own simple wrapper which speaks TAP.

This reduces the number of build/test dependencies and it's not
necessary to copy the tests around anymore to get them working.

Signed-off-by: Daniel Wagner <[email protected]>

Author: Copilot

tests/meson.build

@@ -6,6 +6,7 @@ infra = [
     'nvme_test_io.py',
     'nvme_test_logger.py',
     'nvme_simple_template_test.py',
+    'tap_runner.py',
 ]
 
 tests = [
@@ -31,29 +32,26 @@ tests = [
     'nvme_ctrl_reset_test.py',
 ]
 
-runtests = find_program('nose2', required : false)
-
-if runtests.found()
-    foreach file : infra + tests
-        configure_file(input: file, output: file, copy: true)
-    endforeach
-
-    foreach t : tests
-        t_name = t.split('.')[0]
-        test(
-            'nvme-cli - @0@'.format(t_name),
-            runtests,
-            args: ['--verbose', '--start-dir', meson.current_build_dir(), t_name],
-            env: ['PATH=' + meson.project_build_root() + ':/usr/bin:/usr/sbin'],
-            timeout: 500,
-        )
-    endforeach
-endif
-
 python_module = import('python')
 
 python = python_module.find_installation('python3')
 
+foreach t : tests
+    t_name = t.split('.')[0]
+    test(
+        'nvme-cli - @0@'.format(t_name),
+        python,
+        args: [
+            meson.current_source_dir() / 'tap_runner.py',
+            '--start-dir', meson.current_source_dir(),
+            t_name,
+        ],
+        env: ['PATH=' + meson.project_build_root() + ':/usr/bin:/usr/sbin'],
+        timeout: 500,
+        protocol: 'tap',
+    )
+endforeach
+
 mypy = find_program(
     'mypy',
     required : false,

tests/tap_runner.py

@@ -0,0 +1,112 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: GPL-2.0-or-later
+#
+# This file is part of nvme.
+# Copyright (c) 2026 SUSE LLC
+#
+# Authors: Daniel Wagner <[email protected]>
+"""
+TAP (Test Anything Protocol) version 13 runner for nvme-cli Python tests.
+
+Wraps Python's unittest framework and emits TAP output so that meson can
+parse individual subtest results when protocol: 'tap' is set in meson.build.
+"""
+
+import argparse
+import importlib
+import sys
+import traceback
+import unittest
+
+
+class TAPTestResult(unittest.TestResult):
+    """Collect unittest results and render them as TAP version 13."""
+
+    def __init__(self) -> None:
+        super().__init__()
+        self._test_count = 0
+        self._lines: list[str] = []
+
+    def _description(self, test: unittest.TestCase) -> str:
+        return '{} ({})'.format(test._testMethodName, type(test).__name__)
+
+    def addSuccess(self, test: unittest.TestCase) -> None:
+        super().addSuccess(test)
+        self._test_count += 1
+        self._lines.append('ok {} - {}\n'.format(
+            self._test_count, self._description(test)))
+
+    def addError(self, test: unittest.TestCase, err: object) -> None:
+        super().addError(test, err)
+        self._test_count += 1
+        self._lines.append('not ok {} - {}\n'.format(
+            self._test_count, self._description(test)))
+        for line in traceback.format_exception(*err):  # type: ignore[misc]
+            for subline in line.splitlines():
+                self._lines.append('# {}\n'.format(subline))
+
+    def addFailure(self, test: unittest.TestCase, err: object) -> None:
+        super().addFailure(test, err)
+        self._test_count += 1
+        self._lines.append('not ok {} - {}\n'.format(
+            self._test_count, self._description(test)))
+        for line in traceback.format_exception(*err):  # type: ignore[misc]
+            for subline in line.splitlines():
+                self._lines.append('# {}\n'.format(subline))
+
+    def addSkip(self, test: unittest.TestCase, reason: str) -> None:
+        super().addSkip(test, reason)
+        self._test_count += 1
+        self._lines.append('ok {} - {} # SKIP {}\n'.format(
+            self._test_count, self._description(test), reason))
+
+    def addExpectedFailure(self, test: unittest.TestCase, err: object) -> None:
+        super().addExpectedFailure(test, err)
+        self._test_count += 1
+        self._lines.append('ok {} - {} # TODO expected failure\n'.format(
+            self._test_count, self._description(test)))
+
+    def addUnexpectedSuccess(self, test: unittest.TestCase) -> None:
+        super().addUnexpectedSuccess(test)
+        self._test_count += 1
+        self._lines.append('not ok {} - {} # TODO unexpected success\n'.format(
+            self._test_count, self._description(test)))
+
+    def print_tap(self, stream: object = sys.stdout) -> None:
+        stream.write('TAP version 13\n')  # type: ignore[union-attr]
+        stream.write('1..{}\n'.format(self._test_count))  # type: ignore[union-attr]
+        for line in self._lines:
+            stream.write(line)  # type: ignore[union-attr]
+        stream.flush()  # type: ignore[union-attr]
+
+
+def run_tests(test_module_name: str, start_dir: str | None = None) -> bool:
+    if start_dir:
+        sys.path.insert(0, start_dir)
+
+    module = importlib.import_module(test_module_name)
+
+    loader = unittest.TestLoader()
+    suite = loader.loadTestsFromModule(module)
+
+    result = TAPTestResult()
+    suite.run(result)
+    result.print_tap()
+    return result.wasSuccessful()
+
+
+def main() -> None:
+    parser = argparse.ArgumentParser(
+        description='TAP test runner for nvme-cli tests')
+    parser.add_argument('test_module', help='Test module name to run')
+    parser.add_argument('--start-dir',
+                        help='Directory to prepend to sys.path for imports',
+                        default=None)
+    args = parser.parse_args()
+
+    success = run_tests(args.test_module, args.start_dir)
+    sys.exit(0 if success else 1)
+
+
+if __name__ == '__main__':
+    main()