Moving complex quad file to comlpex integrate

tests/noise/test_zeta.py

@@ -0,0 +1,28 @@
+import numpy as np
+import pytest
+
+import pynam.dielectric
+import pynam.noise.zeta
+from pynam.baskets import CalculationParams
+
+
+@pytest.fixture
+def zeta_p_integrand_lindhard():
+	params = CalculationParams(omega=1e9, v_f=2e6, omega_p=3.544907701811032e15, tau=1e-14)
+	eps_l = pynam.dielectric.get_lindhard_dielectric(params)
+	return pynam.noise.zeta.get_zeta_p_integrand(eps_l)
+
+
+@pytest.mark.parametrize("test_input,expected", [
+	# u    y     zeta_p_i(u, y)
+	((100, 100), -6.891930153028566e-13 - 7.957747045025948e-9j),
+	((100, 1e5), -1.0057257267146669e-10 - 4.0591966623027983e-13j),
+	((1e5, 100), 1.1789175285399862e-8 - 7.957833322596519e-9j)
+])
+def test_zeta_p_integrand_lindhard(zeta_p_integrand_lindhard, test_input, expected):
+	actual = zeta_p_integrand_lindhard(*test_input)
+
+	np.testing.assert_allclose(
+		actual, expected,
+		rtol=1e-7, err_msg='Zeta_p is inaccurate for Lindhard case', verbose=True
+	)