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class QueuedNode(object):
"""Base class for all nodes in the call tree. A node may be an actual call or attribute set/get, in this case this
is a leaf node, or a call group (ordered, unordered, etc.), in that case it's a branch node."""
def __init__(self):
super(QueuedNode, self).__init__()
self._parent = None
def get_parent(self):
return self._parent
def set_parent(self, parent):
self._parent = parent
def get_expected(self):
return [self]
def get_available(self):
return [self]
def pop_matching(self, queue_object):
"""Provide the node with the opportunity to remove queue_object from its subtree. Usually called after
a call to matches(queue_object) as been made.
Returns the matching queued object or None if not found."""
raise NotImplementedError() # pragma: no cover
class QueuedNodeParent(QueuedNode):
"""Base class for all non-leaf nodes."""
def discard_child(self, child):
raise NotImplementedError() # pragma: no cover
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