From b376e3018abd60e9eafaea0a865a44fb01b5c9d2 Mon Sep 17 00:00:00 2001
From: laentropia <aadrian887mh@gmail.com>
Date: Wed, 29 Apr 2026 15:38:47 -0600
Subject: [PATCH] test: test for new

---
 src/lib.rs | 58 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 58 insertions(+)

diff --git a/src/lib.rs b/src/lib.rs
index 3bc13eb..d3f9743 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -537,4 +537,62 @@ impl Display for Matrix {
 #[cfg(test)]
 mod tests {
     use super::*;
+
+    #[test]
+    fn test_new_valid_matrix() {
+        let m = Matrix::new(2, 3, Fraction::from(1i64)).unwrap();
+
+        assert_eq!(m.rows, 2);
+        assert_eq!(m.columns, 3);
+        assert_eq!(m.data.len(), 6);
+
+        for val in m.data {
+            assert_eq!(val, Fraction::from(1i64));
+        }
+    }
+
+    #[test]
+    fn test_new_single_element() {
+        let m = Matrix::new(1, 1, Fraction::from(5i64)).unwrap();
+
+        assert_eq!(m.rows, 1);
+        assert_eq!(m.columns, 1);
+        assert_eq!(m.data.len(), 1);
+        assert_eq!(m.data[0], Fraction::from(5i64));
+    }
+
+    #[test]
+    fn test_new_zero_rows() {
+        let result = Matrix::new(0, 3, Fraction::from(0i64));
+
+        assert!(result.is_err());
+        assert_eq!(result.unwrap_err(), MatrixError::ZeroSize);
+    }
+
+    #[test]
+    fn test_new_zero_columns() {
+        let result = Matrix::new(3, 0, Fraction::from(0i64));
+
+        assert!(result.is_err());
+        assert_eq!(result.unwrap_err(), MatrixError::ZeroSize);
+    }
+
+    #[test]
+    fn test_new_large_matrix() {
+        let m = Matrix::new(100, 100, Fraction::from(2i64)).unwrap();
+
+        assert_eq!(m.data.len(), 10000);
+        assert!(m.data.iter().all(|x| *x == Fraction::from(2i64)));
+    }
+
+    #[test]
+    fn test_new_independent_data() {
+        let m1 = Matrix::new(2, 2, Fraction::from(1i64)).unwrap();
+        let mut m2 = Matrix::new(2, 2, Fraction::from(1i64)).unwrap();
+
+        // modificar uno no debe afectar al otro
+        m2.data[0] = Fraction::from(99i64);
+
+        assert_ne!(m1.data[0], m2.data[0]);
+    }
 }