playlist: Create a Footer box

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

playlist/footer.py

@@ -29,3 +29,21 @@ class Runtime(Gtk.Label):
         text = [ f"{v} {k}{'s' if v != 1 else ''}" for (k, v) in vals if v != 0 ]
 
         self.set_text(', '.join(text) if len(text) > 0 else "0 seconds")
+
+
+class Footer(Gtk.Box):
+    def __init__(self, filter):
+        Gtk.Box.__init__(self)
+        self.visible = VisibleTracks()
+        self.runtime = Runtime()
+
+        self.append(self.visible)
+        self.append(self.runtime)
+
+        filter.connect("notify::pending", self.update_visible)
+        self.set_margin_start(5)
+        self.set_margin_end(5)
+
+    def update_visible(self, model, param):
+        self.visible.set_count(model.get_n_items())
+        self.runtime.set_runtime(model.get_runtime())

playlist/test_footer.py

@@ -1,7 +1,9 @@
 # Copyright 2021 (c) Anna Schumaker.
+import db
 import unittest
 from gi.repository import Gtk
 from . import footer
+from . import model
 
 class TestVisibleTracks(unittest.TestCase):
     def test_init(self):
@@ -41,3 +43,27 @@ class TestRuntime(unittest.TestCase):
         self.assertEqual(runtime.get_text(), "1 week, 2 days")
         runtime.set_runtime(1209600)
         self.assertEqual(runtime.get_text(), "2 weeks")
+
+
+class TestFooter(unittest.TestCase):
+    def test_init(self):
+        foot = footer.Footer(model.FilterPlaylistModel())
+        self.assertIsInstance(foot, Gtk.Box)
+        self.assertIsInstance(foot.visible, footer.VisibleTracks)
+        self.assertIsInstance(foot.runtime, footer.Runtime)
+
+        self.assertEqual(foot.get_orientation(), Gtk.Orientation.HORIZONTAL)
+        self.assertEqual(foot.get_margin_start(), 5)
+        self.assertEqual(foot.get_margin_end(), 5)
+        self.assertEqual(foot.get_first_child(), foot.visible)
+        self.assertEqual(foot.visible.get_next_sibling(), foot.runtime)
+
+    def test_updates(self):
+        db.reset()
+        filter = model.FilterPlaylistModel()
+        foot = footer.Footer(filter)
+        filter.set_playlist(db.user.Table.find("Collection"))
+
+        db.make_fake_track(1, 1, "Test Track 1", "/a/b/c/1.ogg")
+        self.assertEqual(foot.visible.get_text(), "Showing 1 track")
+        self.assertEqual(foot.runtime.get_text(), "1 second")