Add suggested edge cases from initial PR to tests

tests/macros/stack.rs

@@ -1,5 +1,6 @@
-use cool_asserts::assert_panics;
 use crate::macros::assert_eq_and_type;
+use cool_asserts::assert_panics;
+use na::VecStorage;
 use nalgebra::dimension::U1;
 use nalgebra::{dmatrix, matrix, stack};
 use nalgebra::{
@@ -226,6 +227,21 @@ fn stack_edge_cases() {
  let _: SMatrix<i32, 0, 0> = stack![];
  let _: SMatrix<f64, 0, 0> = stack![];
  }
+
+ {
+ // Case suggested by @tpdickso: https://github.com/dimforge/nalgebra/pull/1080#discussion_r1435871752
+ let a = matrix![1, 2;
+ 3, 4];
+ let b = DMatrix::from_data(VecStorage::new(Dyn(2), Dyn(0), vec![]));
+ assert_eq!(
+ stack![a, 0;
+ 0, b],
+ matrix![1, 2;
+ 3, 4;
+ 0, 0;
+ 0, 0]
+ );
+ }
 }
 
 #[rustfmt::skip]
@@ -343,4 +359,13 @@ fn stack_mismatched_dimensions_runtime_panics() {
  stack![s_2x2, s_2x2; d_1x2, d_1x3],
  includes("All blocks in block column 1 must have the same number of columns")
  );
-}
+
+ assert_panics!(
+ {
+ // Edge case suggested by @tpdickso: https://github.com/dimforge/nalgebra/pull/1080#discussion_r1435871752
+ let d_3x0 = DMatrix::from_data(VecStorage::new(Dyn(3), Dyn(0), Vec::<i32>::new()));
+ stack![s_2x2, d_3x0]
+ },
+ includes("All blocks in block row 0 must have the same number of rows")
+ );
+}