audit switch

crates/core/tests/switch.rs

@@ -83,6 +83,30 @@ fn disabled_switch_does_not_report_changes() {
     assert!(changes.borrow().is_empty());
 }
 
+/// The track renders at the platform's stated switch dims, not the generic
+/// control height — the stated metric is the whole chrome.
+#[test]
+fn track_renders_at_the_stated_switch_dims() {
+    let (mut cx, _window, _changes) = switch_window(false, false);
+    let (width, height) = cx.update(|_window, cx| {
+        let metrics = Theme::global(cx).sizes.medium;
+        (metrics.switch_width, metrics.switch_height)
+    });
+    let track = cx
+        .debug_bounds("test-switch-track")
+        .expect("the switch track should have been laid out");
+    assert!(
+        (track.size.width - width).abs() <= px(0.5),
+        "track is {:?} wide, stated switch width is {width:?}",
+        track.size.width
+    );
+    assert!(
+        (track.size.height - height).abs() <= px(0.5),
+        "track is {:?} tall, stated switch height is {height:?}",
+        track.size.height
+    );
+}
+
 #[test]
 fn enter_and_space_report_the_next_value_while_focused() {
     let (mut cx, window, changes) = switch_window(false, false);