cut the range feature

tests/test_ring_buffer.py

@@ -70,6 +70,19 @@ class RingBufferTests(unittest.TestCase):
         self.assertEqual(ring.last_fft_db.shape, (ring.fft_bins,))
         self.assertIsNotNone(ring.distance_axis)
 
+    def test_ring_buffer_reset_clears_cached_history(self):
+        ring = RingBuffer(max_sweeps=2)
+        ring.push(np.linspace(0.0, 1.0, 64, dtype=np.float32), np.linspace(4.0, 10.0, 64))
+
+        ring.reset()
+
+        self.assertIsNone(ring.ring)
+        self.assertIsNone(ring.ring_fft)
+        self.assertIsNone(ring.distance_axis)
+        self.assertIsNone(ring.last_fft_db)
+        self.assertEqual(ring.width, 0)
+        self.assertEqual(ring.head, 0)
+
 
 if __name__ == "__main__":
     unittest.main()