From 5ed5ac82c07cda0a2a8601251a35852d5d25357b Mon Sep 17 00:00:00 2001
From: Ivan Enderlin <ivan.enderlin@hoa-project.net>
Date: Mon, 10 Feb 2020 15:22:22 +0100
Subject: [PATCH] test(interface-types) Improve test cases for `Stack`.

---
 lib/interface-types/src/interpreter/stack.rs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/interface-types/src/interpreter/stack.rs b/lib/interface-types/src/interpreter/stack.rs
index 57b999df2..324c94a1f 100644
--- a/lib/interface-types/src/interpreter/stack.rs
+++ b/lib/interface-types/src/interpreter/stack.rs
@@ -100,7 +100,9 @@ mod tests {
 
         assert_eq!(stack.pop(1), Some(vec![6]));
         assert_eq!(stack.pop(2), Some(vec![5, 4]));
+        assert_eq!(stack.pop(4), None); // not enough items
         assert_eq!(stack.pop(3), Some(vec![3, 2, 1]));
+        assert_eq!(stack.pop1(), None);
         assert_eq!(stack.is_empty(), true);
     }
 }