quick fixes

tests/test_integrator.py

@@ -56,6 +56,8 @@ def test_rk43_soliton(plot=False):
         op.constant_quantity(np.zeros(n)),
         op.envelope_spm(0),
         no_op,
+        np.fft.fft,
+        np.fft.ifft,
     )
 
     res = sc.integrate(spec0, end, lin, non_lin, targets=targets, atol=1e-10, rtol=1e-9)

tests/test_noise.py

@@ -17,14 +17,14 @@ def test_normalisation():
 def test_time_and_back():
     """
     sampling a time series from a spectrum and transforming
-    it back should yield the same spectrum
+    it back yields the same spectrum
     """
     rng = np.random.default_rng(57)
     t = np.linspace(-10, 10, 512)
     signal = np.exp(-((t / 2.568) ** 2)) + rng.random(len(t)) / 15
 
     noise = sc.noise.NoiseMeasurement.from_time_series(signal, 1, "boxcar", detrend=False)
-    _, new_signal = noise.time_series(len(t))
+    _, new_signal = noise.time_series(len(noise.freq))
     new_noise = sc.noise.NoiseMeasurement.from_time_series(new_signal, 1, "boxcar", detrend=False)
     assert new_noise.psd == pytest.approx(noise.psd)