test(app): add basic tab tests

tests/app.rs

@@ -0,0 +1,66 @@
+use traxor::app::App;
+
+#[test]
+fn test_app_creation() {
+    let app = App::new().unwrap();
+    assert_eq!(app.tabs().len(), 3);
+}
+
+#[test]
+fn test_app_quit() {
+    let mut app = App::new().unwrap();
+    app.quit();
+    assert!(!app.running);
+}
+
+#[test]
+fn test_app_next_tab() {
+    let mut app = App::new().unwrap();
+    assert_eq!(app.index(), 0);
+    app.next_tab();
+    assert_eq!(app.index(), 1);
+    app.next_tab();
+    assert_eq!(app.index(), 2);
+    app.next_tab();
+    assert_eq!(app.index(), 0); // Wraps around
+}
+
+#[test]
+fn test_app_prev_tab() {
+    let mut app = App::new().unwrap();
+    assert_eq!(app.index(), 0);
+    app.prev_tab();
+    assert_eq!(app.index(), 2); // Wraps around
+    app.prev_tab();
+    assert_eq!(app.index(), 1);
+}
+
+#[test]
+fn test_app_switch_tab() {
+    let mut app = App::new().unwrap();
+    assert_eq!(app.index(), 0);
+    app.switch_tab(2);
+    assert_eq!(app.index(), 2);
+    app.switch_tab(0);
+    assert_eq!(app.index(), 0);
+}
+
+#[test]
+fn test_app_toggle_popup() {
+    let mut app = App::new().unwrap();
+    assert!(!app.show_popup);
+    app.toggle_popup();
+    assert!(app.show_popup);
+    app.toggle_popup();
+    assert!(!app.show_popup);
+}
+
+#[test]
+fn test_app_open_close_popup() {
+    let mut app = App::new().unwrap();
+    assert!(!app.show_popup);
+    app.open_popup();
+    assert!(app.show_popup);
+    app.close_popup();
+    assert!(!app.show_popup);
+}