Added doctest to skew_heap.py

data_structures/heap/skew_heap.py

@@ -21,14 +21,37 @@ def __init__(self, value: T) -> None:
 
     @property
     def value(self) -> T:
-        """Return the value of the node."""
+        """
+        Return the value of the node.
+
+        >>> sn = SkewNode(10)
+        >>> sn.value
+        10
+        >>> sn = SkewNode(-10.5)
+        >>> sn.value
+        -10.5
+        >>> sn = SkewNode()
+        Traceback (most recent call last):
+        ...
+        TypeError: SkewNode.__init__() missing 1 required positional argument: 'value'
+        """
         return self._value
 
     @staticmethod
     def merge(
         root1: SkewNode[T] | None, root2: SkewNode[T] | None
     ) -> SkewNode[T] | None:
-        """Merge 2 nodes together."""
+        """
+        Merge 2 nodes together.
+        >>> SkewNode.merge(SkewNode(10),SkewNode(-10.5)).value
+        -10.5
+        >>> SkewNode.merge(SkewNode(10),SkewNode(10.5)).value
+        10
+        >>> SkewNode.merge(SkewNode(10),SkewNode(10)).value
+        10
+        >>> SkewNode.merge(SkewNode(-100),SkewNode(-10.5)).value
+        -100
+        """
         if not root1:
             return root2