test: add tests for centered_with_size

src/helpers.rs

@@ -9,3 +9,43 @@ pub fn centered_with_size(pixel_pos: IVec2, size: UVec2) -> Rect {
         size.y,
     )
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_centered_with_size_basic() {
+        let rect = centered_with_size(IVec2::new(100, 100), UVec2::new(50, 30));
+        assert_eq!(rect.origin(), (75, 85));
+        assert_eq!(rect.size(), (50, 30));
+    }
+
+    #[test]
+    fn test_centered_with_size_odd_dimensions() {
+        let rect = centered_with_size(IVec2::new(50, 50), UVec2::new(51, 31));
+        assert_eq!(rect.origin(), (25, 35));
+        assert_eq!(rect.size(), (51, 31));
+    }
+
+    #[test]
+    fn test_centered_with_size_zero_position() {
+        let rect = centered_with_size(IVec2::new(0, 0), UVec2::new(100, 100));
+        assert_eq!(rect.origin(), (-50, -50));
+        assert_eq!(rect.size(), (100, 100));
+    }
+
+    #[test]
+    fn test_centered_with_size_negative_position() {
+        let rect = centered_with_size(IVec2::new(-100, -50), UVec2::new(80, 40));
+        assert_eq!(rect.origin(), (-140, -70));
+        assert_eq!(rect.size(), (80, 40));
+    }
+
+    #[test]
+    fn test_centered_with_size_large_dimensions() {
+        let rect = centered_with_size(IVec2::new(1000, 1000), UVec2::new(1000, 1000));
+        assert_eq!(rect.origin(), (500, 500));
+        assert_eq!(rect.size(), (1000, 1000));
+    }
+}