linux-kernel - [PATCH] kunit: tool: fix extra trailing \n in parsed test output

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Date:   Tue, 20 Oct 2020 16:32:19 -0700
From:   Daniel Latypov <dlatypov@...gle.com>
To:     brendanhiggins@...gle.com
Cc:     davidgow@...gle.com, linux-kernel@...r.kernel.org,
        linux-kselftest@...r.kernel.org, skhan@...uxfoundation.org,
        Daniel Latypov <dlatypov@...gle.com>
Subject: [PATCH] kunit: tool: fix extra trailing \n in parsed test output

For simplcity, strip all trailing whitespace from parsed output.
I imagine no one is printing out meaningful trailing whitespace via
KUNIT_FAIL() or similar, and that if they are, they really shouldn't.

At some point, the lines from `isolate_kunit_output()` started having
trailing \n, which results in artifacty output like this:

$ ./tools/testing/kunit/kunit.py run
[16:16:46] [FAILED] example_simple_test
[16:16:46]     # example_simple_test: EXPECTATION FAILED at lib/kunit/kunit-example-test.c:29

[16:16:46]     Expected 1 + 1 == 3, but

[16:16:46]         1 + 1 == 2

[16:16:46]         3 == 3

[16:16:46]     not ok 1 - example_simple_test

[16:16:46]

After this change:
[16:16:46]     # example_simple_test: EXPECTATION FAILED at lib/kunit/kunit-example-test.c:29
[16:16:46]     Expected 1 + 1 == 3, but
[16:16:46]         1 + 1 == 2
[16:16:46]         3 == 3
[16:16:46]     not ok 1 - example_simple_test
[16:16:46]

Signed-off-by: Daniel Latypov <dlatypov@...gle.com>
---
 tools/testing/kunit/kunit_parser.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/testing/kunit/kunit_parser.py b/tools/testing/kunit/kunit_parser.py
index 8019e3dd4c32..e68b1c66a73f 100644
--- a/tools/testing/kunit/kunit_parser.py
+++ b/tools/testing/kunit/kunit_parser.py
@@ -342,7 +342,8 @@ def parse_run_tests(kernel_output) -> TestResult:
 	total_tests = 0
 	failed_tests = 0
 	crashed_tests = 0
-	test_result = parse_test_result(list(isolate_kunit_output(kernel_output)))
+	test_result = parse_test_result(list(
+            l.rstrip() for l in isolate_kunit_output(kernel_output)))
 	if test_result.status == TestStatus.NO_TESTS:
 		print(red('[ERROR] ') + yellow('no tests run!'))
 	elif test_result.status == TestStatus.FAILURE_TO_PARSE_TESTS:

base-commit: c4d6fe7311762f2e03b3c27ad38df7c40c80cc93
-- 
2.29.0.rc1.297.gfa9743e501-goog