from array import array
from unittest import TestCase

from midi_controller import MidiMsg


class TestMidiMsg(TestCase):
    def test_create(self):
        msg = MidiMsg.create(0x92, 127, 127)
        self.assertEqual(0x90, msg.msg_type)
        self.assertEqual('NOTE_ON', msg.msg_type_str)
        self.assertEqual(3, msg.channel)
        self.assertEqual(127, msg.data0)
        self.assertEqual(127, msg.data1)
        self.assertEqual((0x92, 0x7f, 0x7f), msg.as_tuple())

    def test_create_from_bytes(self):
        msg = MidiMsg.create_from_bytes(array('B', (0x8f, 0x00, 0x7f)))
        self.assertEqual(0x80, msg.msg_type)
        self.assertEqual('NOTE_OFF', msg.msg_type_str)
        self.assertEqual(16, msg.channel)
        self.assertEqual(0, msg.data0)
        self.assertEqual(127, msg.data1)
        self.assertEqual((0x8f, 0x00, 0x7f), msg.as_tuple())

    def test_equality(self):
        m1 = MidiMsg.create_from_bytes(array('B', (0x92, 0x00, 0x7f)))
        m2 = MidiMsg.create(0x92, 0x00, 0x7f)
        self.assertEqual(m1, m2)
        self.assertIsNot(m1, m2)