Add tests for message decoding

src/data/midi/channel.rs

@@ -3,7 +3,7 @@ use core::convert::TryFrom;
 /// The Channel is a value ranging from 0x0 to 0xF 
 /// This is a standard midi concept
 /// Note Channel1 = 0 on the wire
-#[derive(Debug,Copy,Clone)]
+#[derive(Debug,Copy,Clone, Eq, PartialEq)]
 #[repr(u8)]
 pub enum Channel {
     Channel1  = 0x0, Channel2  = 0x1, Channel3  = 0x2, Channel4  = 0x3,

src/data/midi/message/message.rs

@@ -14,7 +14,7 @@ type Velocity = U7;
 /// Note: not current exhaustive and SysEx messages end up
 /// being a confusing case. So are currently note implemented 
 /// they are sort-of unbounded
-#[derive(Debug)]
+#[derive(Debug, Eq, PartialEq)]
 pub enum Message {
     NoteOff(Channel,Note,Velocity),
     NoteOn(Channel,Note,Velocity),

src/data/midi/notes.rs

@@ -5,7 +5,7 @@ use num_enum::TryFromPrimitive;
 /// note the flat versions are associated constants
 /// but can be referenced like Note::Bb3
 /// C1m is the C-1
-#[derive(Debug,Copy,Clone,TryFromPrimitive)]
+#[derive(Debug,Copy,Clone,TryFromPrimitive,Eq,PartialEq)]
 #[repr(u8)]
 pub enum Note {
     C1m, Cs1m, D1m, Ds1m, E1m, F1m, Fs1m, G1m, Gs1m, A1m, As1m, B1m,

src/data/usb_midi/cable_number.rs

@@ -4,7 +4,7 @@ use crate::data::byte::u4::U4;
 /// The Cable Number (CN) is a value ranging from 0x0 to 0xF 
 /// indicating the number assignment of the Embedded MIDI Jack associated 
 /// with the endpoint that is transferring the data
-#[derive(Debug,Clone,Copy)]
+#[derive(Debug,Clone,Copy,Eq, PartialEq)]
 #[repr(u8)]
 pub enum CableNumber {
     Cable0  = 0x0, Cable1  = 0x1, Cable2  = 0x2, Cable3  = 0x3,

src/data/usb_midi/usb_midi_event_packet.rs

@@ -9,7 +9,7 @@ use core::convert::TryFrom;
 /// A packet that communicates with the host
 /// Currently supported is sending the specified normal midi
 /// message over the supplied cable number
-#[derive(Debug)]
+#[derive(Debug,Eq, PartialEq)]
 pub struct UsbMidiEventPacket {
     pub cable_number : CableNumber,
     pub message: Message
@@ -85,3 +85,59 @@ impl UsbMidiEventPacket{
         }
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use core::convert::TryFrom;
+    use crate::data::usb_midi::usb_midi_event_packet::UsbMidiEventPacket;
+    use crate::data::midi::channel::Channel::{Channel1, Channel2};
+    use crate::data::midi::notes::Note;
+    use crate::data::byte::u7::U7;
+    use crate::data::midi::message::Message;
+    use crate::data::usb_midi::cable_number::CableNumber::{Cable0,Cable1};
+    use crate::data::midi::message::control_function::ControlFunction;
+
+    macro_rules! decode_message_test {
+        ($($id:ident:$value:expr,)*) => {
+            $(
+                #[test]
+                fn $id() {
+                    let (usb_midi_data_packet,expected) = $value;
+                    let message = UsbMidiEventPacket::try_from(&usb_midi_data_packet[..]).unwrap();
+                    assert_eq!(expected, message);
+                }
+            )*
+        }
+    }
+
+    decode_message_test! {
+        note_on: ([9, 144, 36, 127], UsbMidiEventPacket {
+            cable_number: Cable0,
+            message: Message::NoteOn(Channel1, Note::C2, U7(127))
+        }),
+        note_off: ([8, 128, 36, 0], UsbMidiEventPacket {
+            cable_number: Cable0,
+            message: Message::NoteOff(Channel1, Note::C2, U7(0))
+        }),
+        polyphonic_aftertouch: ([10, 160, 36, 64], UsbMidiEventPacket {
+            cable_number: Cable0,
+            message: Message::PolyphonicAftertouch(Channel1, Note::C2, U7(64))
+        }),
+        program_change: ([28, 192, 127, 0], UsbMidiEventPacket {
+            cable_number: Cable1,
+            message: Message::ProgramChange(Channel1, U7(127))
+        }),
+        channel_aftertouch: ([13, 208, 127, 0], UsbMidiEventPacket {
+            cable_number: Cable0,
+            message: Message::ChannelAftertouch(Channel1, U7(127))
+        }),
+        pitch_wheel: ([14, 224, 64, 32], UsbMidiEventPacket {
+            cable_number: Cable0,
+            message: Message::PitchWheelChange(Channel1, U7(64), U7(32))
+        }),
+        control_change: ([11, 177, 1, 32], UsbMidiEventPacket {
+            cable_number: Cable0,
+            message: Message::ControlChange(Channel2, ControlFunction::MOD_WHEEL_1, U7(32))
+        }),
+    }
+}