playlist: Create a Model and have it shown by the Selection

Signed-off-by: Anna Schumaker <Anna@NoWheyCreamery.com>

playlist/__init__.py

@@ -1,8 +1,12 @@
 # Copyright 2021 (c) Anna Schumaker.
 from . import column
+from . import model
 from gi.repository import Gtk
 
+Model = model.TagModel()
+
 Selection = Gtk.SingleSelection()
+Selection.set_model(Model)
 
 View = Gtk.ColumnView()
 View.set_hexpand(True)

test_playlist.py

@@ -20,10 +20,12 @@ columns = [ ColumnEV("#", -1, False),
 
 class TestPlaylist(unittest.TestCase):
     def test_playlist_init(self):
+        self.assertIsInstance(playlist.Model, playlist.model.TagModel)
         self.assertIsInstance(playlist.Selection, Gtk.SingleSelection)
         self.assertIsInstance(playlist.View, Gtk.ColumnView)
         self.assertIsInstance(playlist.Scroll, Gtk.ScrolledWindow)
 
+        self.assertEqual(playlist.Selection.get_model(), playlist.Model)
         self.assertEqual(playlist.View.get_model(), playlist.Selection)
         self.assertEqual(playlist.Scroll.get_child(), playlist.View)