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# file scalene/runningstats.py:67-69
# lines [69]
# branches []
import pytest
from scalene.runningstats import RunningStats
@pytest.fixture
def running_stats():
stats = RunningStats()
yield stats
def test_std_with_single_value(running_stats):
running_stats.push(5.0)
running_stats.push(3.0) # Add another value to avoid division by zero
assert running_stats.std() >= 0.0 # Standard deviation should be non-negative
def test_std_with_multiple_values(running_stats):
running_stats.push(2.0)
running_stats.push(4.0)
running_stats.push(4.0)
running_stats.push(4.0)
running_stats.push(5.0)
running_stats.push(5.0)
running_stats.push(7.0)
running_stats.push(9.0)
assert running_stats.std() > 0.0
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