update tests

cognitive_mapping_probe/signal_analysis.py

@@ -73,4 +73,4 @@ def get_power_spectrum_for_plotting(state_deltas: np.ndarray) -> Tuple[np.ndarra
     xf = rfftfreq(n, 1.0)
     
     power_spectrum = np.abs(yf)**2
-    return xf, power_spectrum
+    return xf, power_spectrum

tests/test_components.py

@@ -82,4 +82,4 @@ def test_analyze_cognitive_signal_with_multiple_peaks():
 
     assert results["dominant_periods_steps"] is not None
     expected_periods = [10.0, 4.0, 30.0]
-    assert results["dominant_periods_steps"] == expected_periods
+    assert results["dominant_periods_steps"] == expected_periods