app: add slash commands

tests/test_widgets.py

@@ -256,6 +256,39 @@ async def test_statusbar_deaf():
         assert "\u2298" in rendered
 
 
+@pytest.mark.asyncio
+async def test_statusbar_muted():
+    app = StatusBarApp()
+    async with app.run_test(size=(80, 5)) as _pilot:
+        bar = app.query_one("#status", StatusBar)
+        bar.self_mute = True
+        rendered = bar.render()
+        assert "\u2715" in rendered
+
+
+@pytest.mark.asyncio
+async def test_statusbar_muted_compact():
+    app = StatusBarApp()
+    async with app.run_test(size=(30, 5)) as pilot:
+        bar = app.query_one("#status", StatusBar)
+        bar.self_mute = True
+        await pilot.resize_terminal(30, 5)
+        await pilot.pause()
+        rendered = bar.render()
+        assert "\u2715" in rendered
+
+
+@pytest.mark.asyncio
+async def test_statusbar_muted_medium():
+    app = StatusBarApp()
+    async with app.run_test(size=(50, 5)) as _pilot:
+        bar = app.query_one("#status", StatusBar)
+        bar.self_mute = True
+        rendered = bar.render()
+        assert "\u2715" in rendered
+        assert "mute" in rendered
+
+
 @pytest.mark.asyncio
 async def test_statusbar_reconnecting():
     app = StatusBarApp()