Replay Tabs:

- Add stability detection and threshold classification features with corresponding tests

tests/test_threshold_classifier.py

@@ -0,0 +1,29 @@
+import math
+
+from pygui.backend.threshold_classifier import (
+    ThresholdConfig, classify, classify_all, resolve_bounds,
+    BAND_IN, BAND_HIGH, BAND_LOW
+)
+
+
+def test_classify_about_target_margin():
+    assert classify(149.0, target=149.0, margin=1.0) ==BAND_IN      # exactly
+    assert classify(149.9, target=149.0, margin=1.0) ==BAND_IN      # within
+    assert classify(150.5, target=149.0, margin=1.0) ==BAND_HIGH    # 1.5 above
+    assert classify(147.5, target=149.0, margin=1.0) ==BAND_LOW     # 1.5 below
+    
+    
+def test_manual_bounds_use_set_point_and_margin():
+    cfg = ThresholdConfig(set_point=149.0, margin=1.0, auto=False)
+    assert resolve_bounds([200.0, 0.0], cfg) == (149.0, 1.0)
+    
+def test_auto_bounds_use_mean_and_sigma():
+    cfg = ThresholdConfig(auto=True)
+    target, margin = resolve_bounds([148.0, 150.0, 149.0], cfg)
+    assert target == 149.0
+    assert margin == math.sqrt(2 / 3) 
+    
+def test_classify_all_manual():
+    cfg = ThresholdConfig(set_point=149.0, margin=1.0, auto=False)
+    assert classify_all([149.0, 151.0, 147.0], cfg) == [BAND_IN, BAND_HIGH, BAND_LOW]
+