🧪 [testing improvement] Add target visualization testing

src/ui/mod.rs

@@ -13,6 +13,8 @@ mod setup_test;
 mod curriculum_test;
 pub mod systems;
 pub mod target;
+#[cfg(test)]
+mod target_test;
 
 use bevy::prelude::*;
 use bevy_ui_widgets::SliderPlugin;

src/ui/target_test.rs

@@ -0,0 +1,45 @@
+//! Tests for the target visualization logic.
+
+#[cfg(test)]
+mod tests {
+    use bevy::prelude::*;
+    use std::f32::consts::PI;
+    use crate::ui::target::spawn_target_circle;
+    use crate::components::NumberIndex;
+    use crate::constants::{CIRCLE_RADIUS, LABELS};
+    use crate::resources::Typography;
+
+    fn test_setup_system(mut commands: Commands, typography: Res<Typography>) {
+        spawn_target_circle(&mut commands, &typography);
+    }
+
+    #[test]
+    fn test_spawn_target_circle() {
+        let mut app = App::new();
+        app.add_plugins(MinimalPlugins);
+        app.add_plugins(bevy::asset::AssetPlugin::default());
+        app.insert_resource(Typography::default());
+        app.add_systems(Startup, test_setup_system);
+        app.update();
+
+        let mut query = app.world_mut().query::<(&NumberIndex, &Transform, &Text2d, &Name)>();
+        let count = query.iter(app.world()).count();
+        assert_eq!(count, 8, "Expected 8 target entities to be spawned");
+
+        for (index, transform, text, name) in query.iter(app.world()) {
+            let i = index.0;
+            let expected_label = LABELS[i as usize];
+
+            assert_eq!(text.0, format!("{}", expected_label));
+            assert_eq!(name.as_str(), format!("Target {}", expected_label));
+
+            let angle = PI / 2.0 - (i as f32) * (PI / 4.0);
+            let expected_x = angle.cos() * CIRCLE_RADIUS;
+            let expected_y = angle.sin() * CIRCLE_RADIUS;
+
+            assert!((transform.translation.x - expected_x).abs() < 0.001);
+            assert!((transform.translation.y - expected_y).abs() < 0.001);
+            assert_eq!(transform.translation.z, 1.0);
+        }
+    }
+}