[PATCH v2 2/4] kunit: tool: Report an error if any test has no subtests

David Gow
2021-10-27T01:37:19Z

It's possible for a test to have a subtest header, but zero valid
subtests. We used to error on this if the test plan had no subtests
listed, but it's possible to have subtests without a test plan (indeed,
this is how parameterised tests work).

Tests with 0 subtests now have the result NO_TESTS, and will report an
error (which does not halt test execution, but is printed in a scary red
colour and is noted in the results summary).

Signed-off-by: David Gow <davidgow@google.com>
---
tools/testing/kunit/kunit_parser.py | 14 +++++++++-----
tools/testing/kunit/kunit_tool_test.py | 9 +++++++++
.../test_is_test_passed-no_tests_no_plan.log | 7 +++++++
3 files changed, 25 insertions(+), 5 deletions(-)
create mode 100644 tools/testing/kunit/test_data/test_is_test_passed-no_tests_no_plan.log

diff --git a/tools/testing/kunit/kunit_parser.py b/tools/testing/kunit/kunit_parser.py
index 50ded55c168c..3a838423c381 100644
--- a/tools/testing/kunit/kunit_parser.py
+++ b/tools/testing/kunit/kunit_parser.py
@@ -360,9 +360,6 @@ def parse_test_plan(lines: LineStream, test: Test) -> bool:
test.log.append(lines.pop())
expected_count = int(match.group(1))
test.expected_count = expected_count
- if expected_count == 0:
- test.status = TestStatus.NO_TESTS
- test.add_error('0 tests run!')
return True

TEST_RESULT = re.compile(r'^(ok|not ok) ([0-9]+) (- )?([^#]*)( # .*)?$')
@@ -731,6 +728,7 @@ def parse_test(lines: LineStream, expected_num: int, log: List[str]) -> Test:
# test plan
test.name = "main"
parse_test_plan(lines, test)
+ parent_test = True
else:
# If KTAP/TAP header is not found, test must be subtest
# header or test result line so parse attempt to parser
@@ -744,7 +742,7 @@ def parse_test(lines: LineStream, expected_num: int, log: List[str]) -> Test:
expected_count = test.expected_count
subtests = []
test_num = 1
- while expected_count is None or test_num <= expected_count:
+ while parent_test and (expected_count is None or test_num <= expected_count):
# Loop to parse any subtests.
# Break after parsing expected number of tests or
# if expected number of tests is unknown break when test
@@ -779,9 +777,15 @@ def parse_test(lines: LineStream, expected_num: int, log: List[str]) -> Test:
parse_test_result(lines, test, expected_num)
else:
test.add_error('missing subtest result line!')
+
+ # Check for there being no tests
+ if parent_test and len(subtests) == 0:
+ test.status = TestStatus.NO_TESTS
+ test.add_error('0 tests run!')
+
# Add statuses to TestCounts attribute in Test object
bubble_up_test_results(test)
- if parent_test:
+ if parent_test and not main:
# If test has subtests and is not the main test object, print
# footer.
print_test_footer(test)
diff --git a/tools/testing/kunit/kunit_tool_test.py b/tools/testing/kunit/kunit_tool_test.py
index bc8793145713..c59fe0777387 100755
--- a/tools/testing/kunit/kunit_tool_test.py
+++ b/tools/testing/kunit/kunit_tool_test.py
@@ -208,6 +208,15 @@ class KUnitParserTest(unittest.TestCase):
self.assertEqual(
kunit_parser.TestStatus.NO_TESTS,
result.status)
+ no_plan_log = test_data_path('test_is_test_passed-no_tests_no_plan.log')
+ with open(no_plan_log) as file:
+ result = kunit_parser.parse_run_tests(
+ kunit_parser.extract_tap_lines(file.readlines()))
+ self.assertEqual(0, len(result.test.subtests[0].subtests[0].subtests))
+ self.assertEqual(
+ kunit_parser.TestStatus.NO_TESTS,
+ result.test.subtests[0].subtests[0].status)
+

def test_no_kunit_output(self):
crash_log = test_data_path('test_insufficient_memory.log')
diff --git a/tools/testing/kunit/test_data/test_is_test_passed-no_tests_no_plan.log b/tools/testing/kunit/test_data/test_is_test_passed-no_tests_no_plan.log
new file mode 100644
index 000000000000..dd873c981108
--- /dev/null
+++ b/tools/testing/kunit/test_data/test_is_test_passed-no_tests_no_plan.log
@@ -0,0 +1,7 @@
+TAP version 14
+1..1
+ # Subtest: suite
+ 1..1
+ # Subtest: case
+ ok 1 - case # SKIP
+ok 1 - suite
--
2.33.0.1079.g6e70778dc9-goog