emmental/lib/test_tag.py

# Copyright 2021 (c) Anna Schumaker.
from . import publisher
from . import tag
import threading
import unittest

class FakeTrack:
    def __init__(self, trackid):
        self.trackid = trackid


class TestTag(unittest.TestCase):
    def setUp(self):
        self.changed = None

    def callback_func(self, tag, track):
        self.changed = (tag, track)

    def test_tag_init(self):
        t = tag.Tag("test")
        self.assertEqual(t.name, "test")
        self.assertEqual(t.tracks, [ ])
        self.assertIsNone(t.widgets)
        self.assertIsInstance(t.lock, type(threading.Lock()))
        self.assertIsInstance(t.TrackAdded, publisher.Publisher)
        self.assertIsInstance(t.TrackRemoved, publisher.Publisher)

        self.assertEqual(str(t), "test")

    def test_tag_len(self):
        t = tag.Tag("Test")
        self.assertEqual(len(t), 0)
        t.tracks = [ FakeTrack(i) for i in range(5) ]
        self.assertEqual(len(t), 5)

    def test_tag_lt(self):
        a = tag.Tag("A")
        b = tag.Tag("B")

        self.assertTrue( a < b)
        self.assertFalse(b < a)
        self.assertFalse(a < a)

    def test_tag_state(self):
        t = tag.Tag("test")
        tracks = [ FakeTrack(i) for i in range(5) ]
        t.tracks = tracks

        state = t.__getstate__()
        self.assertEqual(set(state.keys()), set([ "name", "tracks" ]))
        self.assertEqual(state["name"], "test")
        self.assertEqual(state["tracks"], [ 0, 1, 2, 3, 4 ])

        t.__dict__.clear()
        t.__setstate__(state)
        self.assertEqual(t.name, "test")
        self.assertEqual(t.tracks, [ 0, 1, 2, 3, 4 ])
        self.assertEqual(t.widgets, None)
        self.assertIsInstance(t.lock, type(threading.Lock()))
        self.assertIsInstance(t.TrackAdded, publisher.Publisher)
        self.assertIsInstance(t.TrackRemoved, publisher.Publisher)

        for track in tracks:
            t.init_track(track)
        self.assertEqual(t.tracks, tracks)

    def test_tag_add_track(self):
        t = tag.Tag("test")
        t.TrackAdded.register(self.callback_func)

        t.add_track(1)
        self.assertEqual(t.tracks, [ 1 ])
        self.assertEqual(self.changed, (t, 1))

        t.add_track(2)
        self.assertEqual(t.tracks, [ 1, 2 ])
        self.assertEqual(self.changed, (t, 2))

    def test_tag_remove_track(self):
        t = tag.Tag("test")
        t.tracks = [ 1, 2 ]
        t.TrackRemoved.register(self.callback_func)

        t.remove_track(1)
        self.assertEqual(t.tracks, [ 2 ])
        self.assertEqual(self.changed, (t, 1))

        t.remove_track(2)
        self.assertEqual(t.tracks, [ ])
        self.assertEqual(self.changed, (t, 2))