Added unit tests for all the new widgets

src/ui/widgets/popup_tests.rs

@@ -0,0 +1,15 @@
+#[cfg(test)]
+mod tests {
+  use crate::ui::widgets::popup::Popup;
+  use pretty_assertions::assert_eq;
+  use ratatui::widgets::Block;
+
+  #[test]
+  fn test_popup_new() {
+    let popup = Popup::new(Block::new(), 50, 50);
+
+    assert_eq!(popup.widget, Block::new());
+    assert_eq!(popup.percent_x, 50);
+    assert_eq!(popup.percent_y, 50);
+  }
+}