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from unittest import TestCase as StdlibTestCase
from unittest.mock import Mock
from synapse.logging.context import ContextResourceUsage, LoggingContext
from synapse.metrics.background_process_metrics import _BackgroundProcess
class TestBackgroundProcessMetrics(StdlibTestCase):
def test_update_metrics_with_negative_time_diff(self) -> None:
"""We should ignore negative reported utime and stime differences"""
usage = ContextResourceUsage()
usage.ru_stime = usage.ru_utime = -1.0
mock_logging_context = Mock(spec=LoggingContext)
mock_logging_context.get_resource_usage.return_value = usage
process = _BackgroundProcess("test process", mock_logging_context)
# Should not raise
process.update_metrics()
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