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tests: modernize assertions in test_persistencelength (ref #3743) #5407

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tests: modernize assertions in test_persistencelength (ref #3743) #5407

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tests: modernize assertions in test_persistencelength (ref #3743)
palak22291 Jun 22, 2026
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palak22291 Jun 23, 2026
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8 changes: 4 additions & 4 deletions testsuite/MDAnalysisTests/analysis/test_persistencelength.py
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Original file line number Diff line number Diff line change
Expand Up @@ -31,7 +31,7 @@
import matplotlib
import matplotlib.pyplot as plt

from numpy.testing import assert_almost_equal, assert_equal
from numpy.testing import assert_equal

from MDAnalysisTests.datafiles import Plength, TRZ_psf, TRZ

Expand Down Expand Up @@ -73,10 +73,10 @@ def test_run(self, p_run):
assert len(p_run.results.bond_autocorrelation) == 280

def test_lb(self, p_run):
assert_almost_equal(p_run.results.lb, 1.485, 3)
assert p_run.results.lb == pytest.approx(1.485, abs=1e-3)

def test_fit(self, p_run):
assert_almost_equal(p_run.results.lp, 6.504, 3)
assert p_run.results.lp == pytest.approx(6.504, abs=1e-3)
assert len(p_run.results.fit) == len(
p_run.results.bond_autocorrelation
)
Expand Down Expand Up @@ -124,7 +124,7 @@ def test_fit_noisy(self):

a = polymer.fit_exponential_decay(self.x, y2)

assert_almost_equal(a, self.a_ref, decimal=3)
assert a == pytest.approx(self.a_ref, abs=1e-3)
# assert np.rint(a) == self.a_ref


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