[PATCH BlueZ 2/2] unit/test-midi: Add multi-channel writer test

[RasmusML <rasmusml0501@gmail.com>]

From: RasmusML <rasmusml@hotmail.dk>

Add a writer test with messages of the same type on different channels
for Note On, Note Off, Control Change and Pitch Bend. Each of these
needs its own status byte preceded by timestampLow, and running status
must only be used when the channel matches too.

The existing writer tests use a single channel for every event, which
is why the missing timestampLow was not caught before.

Assisted-by: Claude:claude-opus-5-5
---
 unit/test-midi.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/unit/test-midi.c b/unit/test-midi.c
index 702133e59..79cb03123 100644
--- a/unit/test-midi.c
+++ b/unit/test-midi.c
@@ -525,6 +525,24 @@ static const snd_seq_event_t event5_expect[] = {
 
 static const struct midi_write_test midi5 = BLE_WRITE_TEST_INIT(event5, event5_expect);
 
+/*
+ * Same event type on different channels: each needs its own status byte and
+ * timestampLow, so running status must not carry over between them.
+ */
+static const snd_seq_event_t event6[] = {
+	NOTE_EVENT(NOTEON, 0, 60, 100),       /* Note On */
+	NOTE_EVENT(NOTEON, 1, 64, 100),       /* Note On, other channel */
+	NOTE_EVENT(NOTEON, 1, 67, 100),       /* Note On, running status */
+	NOTE_EVENT(NOTEOFF, 0, 60, 0),        /* Note Off */
+	NOTE_EVENT(NOTEOFF, 1, 64, 0),        /* Note Off, other channel */
+	CONTROL_EVENT(CONTROLLER, 2, 0, 123), /* All Notes Off */
+	CONTROL_EVENT(CONTROLLER, 3, 0, 123), /* All Notes Off, other channel */
+	CONTROL_EVENT(PITCHBEND, 4, 0, 0),    /* Pitch Bend */
+	CONTROL_EVENT(PITCHBEND, 5, 0, 0),    /* Pitch Bend, other channel */
+};
+
+static const struct midi_write_test midi6 = BLE_WRITE_TEST_INIT_BASIC(event6);
+
 struct midi_data {
 	size_t events_tested;
 	const struct midi_write_test *midi_test;
@@ -618,6 +636,8 @@ int main(int argc, char *argv[])
 	           &midi4, NULL, test_midi_writer, NULL);
 	tester_add("Split ALSA SysEx events to raw BLE packets",
 	           &midi5, NULL, test_midi_writer, NULL);
+	tester_add("ALSA Seq events on several channels to Raw BLE packets",
+			&midi6, NULL, test_midi_writer, NULL);
 
 	return tester_run();
 }
-- 
2.43.0