emmental: Wire up the show-sidebar properties

Allowing us to show and hide the sidebar by clicking the button in the
header. I also save the current state of the sidebar, although the
Adw.OverlaySplitView might override this when the window is shown.

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

emmental/__init__.py

@@ -206,11 +206,14 @@ class Application(Adw.Application):
                             now_playing=self.build_now_playing(),
                             sidebar=self.build_sidebar(),
                             tracklist=self.build_tracklist())
+        win.bind_property("show-sidebar", win.header, "show-sidebar",
+                          GObject.BindingFlags.BIDIRECTIONAL)
         win.bind_property("user-editing", win.now_playing, "editing")
 
         for (setting, property) in [("window.width", "default-width"),
                                     ("window.height", "default-height"),
-                                    ("now-playing.size", "now-playing-size")]:
+                                    ("now-playing.size", "now-playing-size"),
+                                    ("sidebar.show", "show-sidebar")]:
             self.db.settings.bind_setting(setting, win, property)
 
         self.__add_accelerators(win.accelerators)

tests/test_emmental.py

@@ -292,3 +292,17 @@ class TestEmmental(unittest.TestCase):
         win.header.bg_volume = 0.5
         self.assertTrue(player.bg_enabled)
         self.assertEqual(player.bg_volume, 0.5)
+
+    @unittest.mock.patch("sys.stdout", new_callable=io.StringIO)
+    def test_show_sidebar(self, mock_stdout: io.StringIO):
+        """Test showing the sidebar."""
+        self.application.db = emmental.db.Connection()
+        self.application.factory = emmental.playlist.Factory(
+                self.application.db)
+        self.application.player = emmental.audio.Player()
+        win = self.application.build_window()
+
+        win.show_sidebar = True
+        self.assertTrue(win.header.show_sidebar)
+        win.header.show_sidebar = False
+        self.assertFalse(win.show_sidebar)

tests/test_settings.py

@@ -38,6 +38,16 @@ class TestSettings(unittest.TestCase):
         win = self.app.build_window()
         self.assertEqual(win.get_default_size(), (100, 200))
 
+    def test_save_show_sidebar(self, mock_stdout: io.StringIO):
+        """Check saving and loading the show-sidebar property."""
+        self.assertFalse(self.settings["sidebar.show"])
+
+        self.win.show_sidebar = True
+        self.assertTrue(self.settings["sidebar.show"])
+
+        win = self.app.build_window()
+        self.assertTrue(win.show_sidebar)
+
     def test_save_volume(self, mock_stdout: io.StringIO):
         """Check saving and loading volume from the database."""
         self.assertEqual(self.settings["audio.volume"], 1.0)