From a098ea9fd92214a752cdc6009c6dde81c7558bb1 Mon Sep 17 00:00:00 2001
From: "google-labs-jules[bot]"
 <161369871+google-labs-jules[bot]@users.noreply.github.com>
Date: Thu, 16 Apr 2026 14:00:31 +0000
Subject: [PATCH] =?UTF-8?q?=F0=9F=A7=AA=20Add=20unit=20tests=20for=20`curr?=
 =?UTF-8?q?iculum=5Fpage=5Fbutton=5Fsystem`?=
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Co-authored-by: dynamikdev <717692+dynamikdev@users.noreply.github.com>
---
 src/ui/mod.rs          |  2 ++
 src/ui/systems_test.rs | 73 ++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 75 insertions(+)
 create mode 100644 src/ui/systems_test.rs

diff --git a/src/ui/mod.rs b/src/ui/mod.rs
index f77092d..ba51e35 100644
--- a/src/ui/mod.rs
+++ b/src/ui/mod.rs
@@ -12,6 +12,8 @@ mod setup_test;
 #[cfg(test)]
 mod curriculum_test;
 pub mod systems;
+#[cfg(test)]
+mod systems_test;
 pub mod target;
 
 use bevy::prelude::*;
diff --git a/src/ui/systems_test.rs b/src/ui/systems_test.rs
new file mode 100644
index 0000000..347db39
--- /dev/null
+++ b/src/ui/systems_test.rs
@@ -0,0 +1,73 @@
+use bevy::prelude::*;
+use crate::components::{CurriculumPrevPageButton, CurriculumNextPageButton};
+use crate::resources::CurriculumState;
+use super::systems::curriculum_page_button_system;
+
+fn setup_app(is_visible: bool, pages_count: usize, current_page: usize) -> App {
+    let mut app = App::new();
+    app.add_plugins(bevy::prelude::TaskPoolPlugin::default());
+
+    let mut state = CurriculumState::default();
+    state.is_visible = is_visible;
+    state.current_page = current_page;
+    for _ in 0..pages_count {
+        state.pages.push(Handle::default());
+    }
+    app.insert_resource(state);
+    app.add_systems(Update, curriculum_page_button_system);
+    app
+}
+
+#[test]
+fn test_hidden_or_empty_no_effect() {
+    let mut app = setup_app(false, 2, 0); // hidden
+    app.world_mut().spawn((Interaction::Pressed, CurriculumNextPageButton));
+    app.update();
+    assert_eq!(app.world().resource::<CurriculumState>().current_page, 0);
+
+    let mut app = setup_app(true, 0, 0); // empty
+    app.world_mut().spawn((Interaction::Pressed, CurriculumNextPageButton));
+    app.update();
+    assert_eq!(app.world().resource::<CurriculumState>().current_page, 0);
+}
+
+#[test]
+fn test_prev_button_decrements() {
+    let mut app = setup_app(true, 3, 1);
+    app.world_mut().spawn((Interaction::Pressed, CurriculumPrevPageButton));
+    app.update();
+    assert_eq!(app.world().resource::<CurriculumState>().current_page, 0);
+}
+
+#[test]
+fn test_prev_button_at_zero() {
+    let mut app = setup_app(true, 3, 0);
+    app.world_mut().spawn((Interaction::Pressed, CurriculumPrevPageButton));
+    app.update();
+    assert_eq!(app.world().resource::<CurriculumState>().current_page, 0);
+}
+
+#[test]
+fn test_next_button_increments() {
+    let mut app = setup_app(true, 3, 1);
+    app.world_mut().spawn((Interaction::Pressed, CurriculumNextPageButton));
+    app.update();
+    assert_eq!(app.world().resource::<CurriculumState>().current_page, 2);
+}
+
+#[test]
+fn test_next_button_at_max() {
+    let mut app = setup_app(true, 3, 2);
+    app.world_mut().spawn((Interaction::Pressed, CurriculumNextPageButton));
+    app.update();
+    assert_eq!(app.world().resource::<CurriculumState>().current_page, 2);
+}
+
+#[test]
+fn test_ignore_hover_none() {
+    let mut app = setup_app(true, 3, 1);
+    app.world_mut().spawn((Interaction::Hovered, CurriculumNextPageButton));
+    app.world_mut().spawn((Interaction::None, CurriculumPrevPageButton));
+    app.update();
+    assert_eq!(app.world().resource::<CurriculumState>().current_page, 1);
+}