def test_stieltjes():
assert isinstance(stieltjes(x), stieltjes)
assert isinstance(stieltjes(x, a), stieltjes)
# Zero'th constant EulerGamma
assert stieltjes(0) == S.EulerGamma
assert stieltjes(0, 1) == S.EulerGamma
# Not defined
assert stieltjes(nan) == nan
assert stieltjes(0, nan) == nan
assert stieltjes(-1) == S.ComplexInfinity
assert stieltjes(1.5) == S.ComplexInfinity
assert stieltjes(z, 0) == S.ComplexInfinity
assert stieltjes(z, -1) == S.ComplexInfinity
def test_stieltjes():
assert isinstance(stieltjes(x), stieltjes)
assert isinstance(stieltjes(x, a), stieltjes)
# Zero'th constant EulerGamma
assert stieltjes(0) == S.EulerGamma
assert stieltjes(0, 1) == S.EulerGamma
# Not defined
assert stieltjes(nan) == nan
assert stieltjes(0, nan) == nan
assert stieltjes(-1) == S.ComplexInfinity
assert stieltjes(1.5) == S.ComplexInfinity
assert stieltjes(z, 0) == S.ComplexInfinity
assert stieltjes(z, -1) == S.ComplexInfinity
def test_stieltjes_evalf():
assert abs(stieltjes(0).evalf() - 0.577215664) < 1E-9
assert abs(stieltjes(0, 0.5).evalf() - 1.963510026) < 1E-9
assert abs(stieltjes(1, 2).evalf() + 0.072815845) < 1E-9
def test_stieltjes_evalf():
assert abs(stieltjes(0).evalf() - 0.577215664) < 1e-9
assert abs(stieltjes(0, 0.5).evalf() - 1.963510026) < 1e-9
assert abs(stieltjes(1, 2).evalf() + 0.072815845) < 1e-9
