Fixes buffer capacity not being set

pydtn/__init__.py

@@ -227,7 +227,7 @@ class Packet:
 class Buffer:
     """A place for a node to hold packets."""
 
-    def __init__(self, **options):
+    def __init__(self, capacity=None, **options):
         """
         Create a buffer.
 
@@ -237,7 +237,10 @@ class Buffer:
         Keyword arguments:
         capacity -- the maximum number of packets to hold (default infinity).
         """
-        self.capacity = options.get('capacity', float('inf'))
+        if capacity is None:
+            self.capacity = float('inf')
+        else:
+            self.capacity = capacity
         self.store = OrderedDict()
 
     @property
@@ -280,7 +283,7 @@ class Node:
         """Create a node."""
         self.network = None
 
-        self.buffer = Buffer()
+        self.buffer = Buffer(capacity=options.get('buffer_capacity', None))
         self._neighbours = set()
 
         self.options = ChainMap(options, {