linux-kernel - [PATCH v2 1/4] kunit: tool: fix unit test cleanup handling

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Date:   Wed,  2 Dec 2020 11:08:21 -0800
From:   Daniel Latypov <dlatypov@...gle.com>
To:     davidgow@...gle.com
Cc:     brendanhiggins@...gle.com, linux-kernel@...r.kernel.org,
        linux-kselftest@...r.kernel.org, skhan@...uxfoundation.org,
        Daniel Latypov <dlatypov@...gle.com>
Subject: [PATCH v2 1/4] kunit: tool: fix unit test cleanup handling

* Stop leaking file objects.
* Use self.addCleanup() to ensure we call cleanup functions even if
setUp() fails.
* use mock.patch.stopall instead of more error-prone manual approach

Signed-off-by: Daniel Latypov <dlatypov@...gle.com>
---
 tools/testing/kunit/kunit_tool_test.py | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/tools/testing/kunit/kunit_tool_test.py b/tools/testing/kunit/kunit_tool_test.py
index 497ab51bc170..3fbe1acd531a 100755
--- a/tools/testing/kunit/kunit_tool_test.py
+++ b/tools/testing/kunit/kunit_tool_test.py
@@ -288,19 +288,17 @@ class StrContains(str):
 class KUnitMainTest(unittest.TestCase):
 	def setUp(self):
 		path = get_absolute_path('test_data/test_is_test_passed-all_passed.log')
-		file = open(path)
-		all_passed_log = file.readlines()
-		self.print_patch = mock.patch('builtins.print')
-		self.print_mock = self.print_patch.start()
+		with open(path) as file:
+			all_passed_log = file.readlines()
+
+		self.print_mock = mock.patch('builtins.print').start()
+		self.addCleanup(mock.patch.stopall)
+
 		self.linux_source_mock = mock.Mock()
 		self.linux_source_mock.build_reconfig = mock.Mock(return_value=True)
 		self.linux_source_mock.build_um_kernel = mock.Mock(return_value=True)
 		self.linux_source_mock.run_kernel = mock.Mock(return_value=all_passed_log)
 
-	def tearDown(self):
-		self.print_patch.stop()
-		pass
-
 	def test_config_passes_args_pass(self):
 		kunit.main(['config', '--build_dir=.kunit'], self.linux_source_mock)
 		assert self.linux_source_mock.build_reconfig.call_count == 1

base-commit: 509a15421674b9e1a3e1916939d0d0efd3e578da
-- 
2.29.2.576.ga3fc446d84-goog