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tools/tuxdmx-midi-bridge/tests/test_midi_serialization.py

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+from __future__ import annotations
+
+from dataclasses import dataclass
+
+from tuxdmx_midi_bridge.midi import MidiEventFilter, normalize_message
+
+
+@dataclass
+class FakeMessage:
+    type: str
+    channel: int
+    note: int | None = None
+    control: int | None = None
+    program: int | None = None
+    velocity: int | None = None
+    value: int | None = None
+
+
+def test_normalize_note_on() -> None:
+    payload = normalize_message(
+        FakeMessage(type="note_on", channel=0, note=36, velocity=127),
+        "bridge-a",
+        "USB MIDI",
+    )
+    assert payload is not None
+    assert payload["message"]["type"] == "note_on"
+    assert payload["message"]["number"] == 36
+    assert payload["message"]["value"] == 127
+
+
+def test_filter_suppresses_duplicates_and_rate_limits_control_change() -> None:
+    event_filter = MidiEventFilter(channel_filter=None, control_change_interval_ms=25, suppress_duplicate_values=True)
+    payload = {
+        "message": {"type": "control_change", "channel": 0, "number": 14, "value": 64}
+    }
+    assert event_filter.should_forward(payload) is True
+    assert event_filter.should_forward(payload) is False
+