Refactor code structure for improved readability and maintainability

tests/test_sensor_editor.py

@@ -0,0 +1,49 @@
+"""Tests for src/pygui/backend/sensor_editor.py."""
+import pytest
+from pygui.backend.sensor_editor import SensorEditor
+
+
+def test_replace_overrides_raw_value():
+    ed = SensorEditor()
+    ed.set_replacement(2, 150.0)     # index 2 forced to 150.0 regardless of raw
+    assert ed.apply([149.0, 149.0, 99.0]) == [149.0, 149.0, 150.0]
+
+
+def test_offset_shifts_raw_value():
+    ed = SensorEditor()
+    ed.set_offset(0, +0.5)
+    assert ed.apply([149.0, 149.0]) == [149.5, 149.0]
+
+
+def test_replace_and_offset_apply_in_order():
+    """Replacement wins over raw, then offset is added on top."""
+    ed = SensorEditor()
+    ed.set_replacement(2, 150.0)
+    ed.set_offset(2, +1.0)           # sensor 2: replace 99→150, then +1 → 151
+    ed.set_offset(0, +0.5)
+    out = ed.apply([149.0, 149.0, 99.0, 149.0])
+    assert out == [149.5, 149.0, 151.0, 149.0]
+
+
+def test_clear_single_index_restores_only_that_sensor():
+    ed = SensorEditor()
+    ed.set_replacement(0, 0.0)
+    ed.set_replacement(1, 0.0)
+    ed.clear(0)                       # clear only index 0
+    assert ed.apply([149.0, 149.0]) == [149.0, 0.0]
+
+
+def test_clear_restores_all():
+    ed = SensorEditor()
+    ed.set_offset(0, 5.0)
+    ed.set_replacement(1, 200.0)
+    ed.clear()
+    assert ed.apply([149.0, 149.0]) == [149.0, 149.0]
+
+
+def test_no_overrides_returns_copy():
+    ed = SensorEditor()
+    original = [149.0, 149.0]
+    result = ed.apply(original)
+    assert result == original
+    assert result is not original