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Original file line number | Diff line number | Diff line change |
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from __future__ import annotations | ||
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from time import monotonic | ||
from typing import Callable | ||
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import rich.repr | ||
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@rich.repr.auto(angular=True) | ||
class Clock: | ||
"""An object to get relative time. | ||
The `time` attribute of clock will return the time in seconds since the | ||
Clock was created or reset. | ||
""" | ||
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def __init__(self, *, get_time: Callable[[], float] = monotonic) -> None: | ||
"""Create a clock. | ||
Args: | ||
get_time: A callable to get time in seconds. | ||
start: Start the clock (time is 0 unless clock has been started). | ||
""" | ||
self._get_time = get_time | ||
self._start_time = self._get_time() | ||
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def __rich_repr__(self) -> rich.repr.Result: | ||
yield self.time | ||
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def clone(self) -> Clock: | ||
"""Clone the Clock with an independent time.""" | ||
return Clock(get_time=self._get_time) | ||
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def reset(self) -> None: | ||
"""Reset the clock.""" | ||
self._start_time = self._get_time() | ||
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@property | ||
def time(self) -> float: | ||
"""Time since creation or reset.""" | ||
return self._get_time() - self._start_time | ||
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class MockClock(Clock): | ||
"""A mock clock object where the time may be explicitly set.""" | ||
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def __init__(self, time: float = 0.0) -> None: | ||
"""Construct a mock clock.""" | ||
self._time = time | ||
super().__init__(get_time=lambda: self._time) | ||
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def clone(self) -> MockClock: | ||
"""Clone the mocked clock (clone will return the same time as original).""" | ||
clock = MockClock(self._time) | ||
clock._get_time = self._get_time | ||
clock._time = self._time | ||
return clock | ||
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def reset(self) -> None: | ||
"""A null-op because it doesn't make sense to reset a mocked clock.""" | ||
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def set_time(self, time: float) -> None: | ||
"""Set the time for the clock. | ||
Args: | ||
time: Time to set. | ||
""" | ||
self._time = time | ||
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@property | ||
def time(self) -> float: | ||
"""Time since creation or reset.""" | ||
return self._get_time() |
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