From 81821b35835971e8adfb509d64f864223ceed218 Mon Sep 17 00:00:00 2001
From: AnupamBahl <13972559+AnupamBahl@users.noreply.github.com>
Date: Sat, 7 Oct 2023 17:39:26 -0700
Subject: [PATCH] Adding more tests

---
 data_structures/stacks/stack_tracking_min_max.py | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/data_structures/stacks/stack_tracking_min_max.py b/data_structures/stacks/stack_tracking_min_max.py
index 102504446..6c638110d 100644
--- a/data_structures/stacks/stack_tracking_min_max.py
+++ b/data_structures/stacks/stack_tracking_min_max.py
@@ -152,6 +152,15 @@ class MinMaxStack:
     def stack_is_valid(self) -> bool:
         """
         Validate stack is not empty
+
+        >>> test_stack = MinMaxStack(3)
+        >>> test_stack.stack_is_valid()
+        Stack is empty
+        False
+        >>> test_stack.push_value(0)
+        True
+        >>> test_stack.stack_is_valid()
+        True
         """
         if len(self.stack) == 0:
             print("Stack is empty")