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# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import io
import operator
from unittest import mock
import subunit
import testtools
from stestr import bisect_tests
from stestr.repository import abstract
from stestr.tests import base
class FakeTestRun(abstract.AbstractTestRun):
def get_test(self):
case = subunit.ByteStreamToStreamResult(io.BytesIO(self._content))
def wrap_result(result):
# Wrap in a router to mask out startTestRun/stopTestRun from the
# ExtendedToStreamDecorator.
result = testtools.StreamResultRouter(result, do_start_stop_run=False)
# Wrap that in ExtendedToStreamDecorator to convert v1 calls to
# StreamResult.
return testtools.ExtendedToStreamDecorator(result)
return testtools.DecorateTestCaseResult(
case,
wrap_result,
operator.methodcaller("startTestRun"),
operator.methodcaller("stopTestRun"),
)
def get_id(self):
return self.id
class FakeFailedTestRunNoTags(FakeTestRun):
def __init__(self, failure=True):
# Generate a subunit stream
self.id = 2
stream_buf = io.BytesIO()
stream = subunit.StreamResultToBytes(stream_buf)
stream.status(test_id="test_a", test_status="inprogress")
stream.status(test_id="test_a", test_status="success")
stream.status(test_id="test_b", test_status="inprogress")
stream.status(test_id="test_b", test_status="success")
stream.status(test_id="test_c", test_status="inprogress")
stream.status(test_id="test_c", test_status="fail")
stream_buf.seek(0)
self._content = stream_buf.getvalue()
class FakeFailingWithTags(FakeTestRun):
def __init__(self, failure=True):
# Generate a subunit stream
self.id = None
stream_buf = io.BytesIO()
stream = subunit.StreamResultToBytes(stream_buf)
stream.status(
test_id="test_c", test_status="inprogress", test_tags=["worker-0"]
)
stream.status(test_id="test_c", test_status="fail", test_tags=["worker-0"])
stream_buf.seek(0)
self._content = stream_buf.getvalue()
class FakeNoFailing(FakeTestRun):
def __init__(self, failure=True):
# Generate a subunit stream
stream_buf = io.BytesIO(bytes(b""))
self._content = stream_buf.getvalue()
self.id = None
class FakeFailedTestRunWithTags(FakeTestRun):
def __init__(self, failure=True):
# Generate a subunit stream
stream_buf = io.BytesIO()
stream = subunit.StreamResultToBytes(stream_buf)
stream.status(
test_id="test_a", test_status="inprogress", test_tags=["worker-0"]
)
stream.status(test_id="test_a", test_status="success", test_tags=["worker-0"])
stream.status(
test_id="test_b", test_status="inprogress", test_tags=["worker-1"]
)
stream.status(test_id="test_b", test_status="success", test_tags=["worker-1"])
stream.status(
test_id="test_c", test_status="inprogress", test_tags=["worker-0"]
)
stream.status(test_id="test_c", test_status="fail", test_tags=["worker-0"])
stream_buf.seek(0)
self._content = stream_buf.getvalue()
self.id = 2
class FakeFailedMultiWorkerTestRunWithTags(FakeTestRun):
def __init__(self, failure=True):
# Generate a subunit stream
stream_buf = io.BytesIO()
stream = subunit.StreamResultToBytes(stream_buf)
stream.status(
test_id="test_a", test_status="inprogress", test_tags=["worker-0"]
)
stream.status(test_id="test_a", test_status="success", test_tags=["worker-0"])
stream.status(
test_id="test_b", test_status="inprogress", test_tags=["worker-1"]
)
stream.status(test_id="test_b", test_status="fail", test_tags=["worker-1"])
stream.status(
test_id="test_c", test_status="inprogress", test_tags=["worker-0"]
)
stream.status(test_id="test_c", test_status="fail", test_tags=["worker-0"])
stream_buf.seek(0)
self._content = stream_buf.getvalue()
self.id = 2
class TestBisectTests(base.TestCase):
def setUp(self):
super().setUp()
self.repo_mock = mock.create_autospec("stestr.repository.file.Repository")
self.conf_mock = mock.create_autospec("stestr.config_file.TestrConf")
self.run_func_mock = mock.MagicMock()
self.latest_run_mock = mock.MagicMock()
def test_bisect_no_failures_provided(self):
bisector = bisect_tests.IsolationAnalyzer(
self.latest_run_mock, self.conf_mock, self.run_func_mock, self.repo_mock
)
self.assertRaises(ValueError, bisector.bisect_tests, [])
def test_prior_tests_invlaid_test_id(self):
bisector = bisect_tests.IsolationAnalyzer(
self.latest_run_mock, self.conf_mock, self.run_func_mock, self.repo_mock
)
run = FakeFailedTestRunNoTags()
self.assertRaises(KeyError, bisector._prior_tests, run, "bad_test_id")
def test_get_prior_tests_no_tags(self):
bisector = bisect_tests.IsolationAnalyzer(
self.latest_run_mock, self.conf_mock, self.run_func_mock, self.repo_mock
)
run = FakeFailedTestRunNoTags()
prior_tests = bisector._prior_tests(run, "test_c")
self.assertEqual(["test_a", "test_b"], prior_tests)
def test_get_prior_tests_with_tags(self):
bisector = bisect_tests.IsolationAnalyzer(
self.latest_run_mock, self.conf_mock, self.run_func_mock, self.repo_mock
)
run = FakeFailedTestRunWithTags()
prior_tests = bisector._prior_tests(run, "test_c")
self.assertEqual(["test_a"], prior_tests)
@mock.patch("stestr.output.output_table")
def test_bisect_tests_isolated_failure(self, table_mock):
run = FakeFailedTestRunWithTags()
self.conf_mock.get_run_command = mock.MagicMock()
def get_failures(*args, **kwargs):
return FakeNoFailing()
self.repo_mock.get_failing = get_failures
bisector = bisect_tests.IsolationAnalyzer(
run, self.conf_mock, self.run_func_mock, self.repo_mock
)
return_code = bisector.bisect_tests(["test_c"])
expected_issue = [
("failing test", "caused by test"),
("test_c", "unknown - no conflicts"),
]
table_mock.assert_called_once_with(expected_issue)
self.assertEqual(3, return_code)
@mock.patch("stestr.output.output_table")
def test_bisect_tests_not_isolated_failure(self, table_mock):
run = FakeFailedTestRunWithTags()
self.conf_mock.get_run_command = mock.MagicMock()
def get_failures(*args, **kwargs):
return FakeFailingWithTags()
self.repo_mock.get_failing = get_failures
bisector = bisect_tests.IsolationAnalyzer(
run, self.conf_mock, self.run_func_mock, self.repo_mock
)
return_code = bisector.bisect_tests(["test_c"])
expected_issue = [("failing test", "caused by test"), ("test_c", "test_a")]
table_mock.assert_called_once_with(expected_issue)
self.assertEqual(3, return_code)
@mock.patch("stestr.output.output_table")
def test_bisect_tests_not_isolated_multiworker_failures(self, table_mock):
run = FakeFailedMultiWorkerTestRunWithTags()
self.conf_mock.get_run_command = mock.MagicMock()
def get_failures(*args, **kwargs):
return FakeFailingWithTags()
self.repo_mock.get_failing = get_failures
bisector = bisect_tests.IsolationAnalyzer(
run, self.conf_mock, self.run_func_mock, self.repo_mock
)
return_code = bisector.bisect_tests(["test_b", "test_c"])
expected_issue = [
("failing test", "caused by test"),
("test_b", "unknown - no conflicts"),
("test_c", "test_a"),
]
table_mock.assert_called_once_with(expected_issue)
self.assertEqual(3, return_code)
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