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30 lines
755 B
Python
30 lines
755 B
Python
import contextlib
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import time
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class DeadlineExceeded(Exception):
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pass
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class TimedContext(contextlib.ContextDecorator):
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"""
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A context that will raise DeadlineExceeded if the
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max duration is reached during the execution.
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>>> TimedContext(1)(time.sleep)(.1)
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>>> TimedContext(0)(time.sleep)(.1)
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Traceback (most recent call last):
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...
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tests._context.DeadlineExceeded: (..., 0)
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"""
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def __init__(self, max_duration: int):
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self.max_duration = max_duration
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def __enter__(self):
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self.start = time.monotonic()
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def __exit__(self, *err):
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duration = time.monotonic() - self.start
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if duration > self.max_duration:
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raise DeadlineExceeded(duration, self.max_duration)
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