Do proper dependency calculations
Change-Id: Ic8a9bd2105ebfff3604a45b45eac39da3b1bbcf5 Signed-off-by: Zane Bitter <zbitter@redhat.com>
This commit is contained in:
Zane Bitter
parent
f74219a52d
commit
067e037064
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@ -52,6 +52,8 @@ class CloudWatchAlarm(Resource):
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'Megabits/Second', 'Gigabits/Second', 'Terabits/Second',
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'Count/Second', None]}}
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strict_dependency = False
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def __init__(self, name, json_snippet, stack):
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super(CloudWatchAlarm, self).__init__(name, json_snippet, stack)
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self.instance_id = ''
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@ -96,6 +98,3 @@ class CloudWatchAlarm(Resource):
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def FnGetRefId(self):
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return unicode(self.name)
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def strict_dependency(self):
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return False
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@ -0,0 +1,201 @@
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# vim: tabstop=4 shiftwidth=4 softtabstop=4
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import collections
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import itertools
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from heat.common import exception
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class CircularDependencyException(exception.OpenstackException):
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message = _("Circular Dependency Found: %(cycle)s")
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class Dependencies(object):
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'''Helper class for calculating a dependency graph'''
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class Node(object):
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def __init__(self, requires=None, required_by=None):
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'''
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Initialise the node, optionally with a set of keys this node
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requires and/or a set of keys that this node is required by.
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'''
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self.require = requires and requires.copy() or set()
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self.satisfy = required_by and required_by.copy() or set()
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def copy(self):
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'''Make a copy of the node'''
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return Dependencies.Node(self.require, self.satisfy)
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def reverse_copy(self):
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'''Make a copy of the node with the edge directions reversed'''
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return Dependencies.Node(self.satisfy, self.require)
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def required_by(self, source=None):
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'''
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List the keys that require this node, and optionally add a
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new one
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'''
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if source is not None:
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self.satisfy.add(source)
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return iter(self.satisfy)
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def requires(self, target):
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'''Add a key that this node requires'''
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self.require.add(target)
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def __isub__(self, target):
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'''Remove a key that this node requires'''
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self.require.remove(target)
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return self
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def __nonzero__(self):
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'''Test if this node is a leaf (requires nothing)'''
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return bool(self.require)
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def stem(self):
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'''Test if this node is a stem (required by nothing)'''
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return not bool(self.satisfy)
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def disjoint(self):
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'''Test if this node is both a lead and a stem'''
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return self and self.stem()
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def __len__(self):
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'''Count the number of keys required by this node'''
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return len(self.require)
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def __iter__(self):
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'''Iterate over the keys required by this node'''
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return iter(self.require)
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def __str__(self):
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'''Return a human-readable string representation of the node'''
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return '{%s}' % ', '.join(str(n) for n in self)
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def __repr__(self):
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'''Return a string representation of the node'''
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return repr(self.require)
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def __init__(self, edges=[]):
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'''
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Initialise, optionally with a list of edges, in the form of
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(requirer, required) tuples.
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'''
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self.deps = collections.defaultdict(self.Node)
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for e in edges:
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self += e
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def __iadd__(self, edge):
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'''Add another edge, in the form of a (requirer, required) tuple'''
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requirer, required = edge
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if required is None:
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# Just ensure the node is created by accessing the defaultdict
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self.deps[requirer]
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else:
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self.deps[required].required_by(requirer)
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self.deps[requirer].requires(required)
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return self
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def __getitem__(self, last):
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'''
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Return a partial dependency graph consisting of the specified node and
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all those that require it only.
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'''
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if last not in self.deps:
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raise KeyError
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def get_edges(key):
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def requirer_edges(rqr):
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# Concatenate the dependency on the current node with the
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# recursive generated list
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return itertools.chain([(rqr, key)], get_edges(rqr))
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# Get the edge list for each node that requires the current node
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edge_lists = itertools.imap(requirer_edges,
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self.deps[key].required_by())
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# Combine the lists into one long list
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return itertools.chain.from_iterable(edge_lists)
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if self.deps[last].stem():
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# Nothing requires this, so just add the node itself
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edges = [(last, None)]
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else:
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edges = get_edges(last)
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return Dependencies(edges)
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@staticmethod
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def _deps_to_str(deps):
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'''Convert the given dependency graph to a human-readable string'''
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pairs = ('%s: %s' % (str(k), str(v)) for k, v in deps.items())
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return '{%s}' % ', '.join(pairs)
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def __str__(self):
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'''
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Return a human-readable string representation of the dependency graph
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'''
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return self._deps_to_str(self.deps)
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def _edges(self):
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'''Return an iterator over all of the edges in the graph'''
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def outgoing_edges(rqr, node):
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if node.disjoint():
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yield (rqr, None)
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else:
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for rqd in node:
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yield (rqr, rqd)
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return (outgoing_edges(*item) for item in self.deps.iteritems())
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def __repr__(self):
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'''Return a string representation of the object'''
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return 'Dependencies([%s])' % ', '.join(repr(e) for e in edges)
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def _toposort(self, deps):
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'''Generate a topological sort of a dependency graph'''
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def next_leaf():
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for leaf, node in deps.items():
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if not node:
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return leaf, node
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# There are nodes remaining, but no more leaves: a cycle
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cycle = self._deps_to_str(deps)
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raise CircularDependencyException(cycle=cycle)
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for iteration in xrange(len(deps)):
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leaf, node = next_leaf()
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yield leaf
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# Remove the node and all edges connected to it before continuing
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# to look for more leaves
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for src in node.required_by():
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deps[src] -= leaf
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del deps[leaf]
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def _mapgraph(self, func):
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'''Map the supplied function onto every node in the graph.'''
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return dict((k, func(n)) for k, n in self.deps.items())
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def __iter__(self):
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'''Return a topologically sorted iterator'''
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deps = self._mapgraph(lambda n: n.copy())
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return self._toposort(deps)
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def __reversed__(self):
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'''Return a reverse topologically sorted iterator'''
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rev_deps = self._mapgraph(lambda n: n.reverse_copy())
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return self._toposort(rev_deps)
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@ -381,7 +381,7 @@ class EngineManager(manager.Manager):
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"""
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stack = db_api.stack_get(context, stack_name)
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if stack:
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return [r.name for r in stack.resources]
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return [res.name for res in stack]
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else:
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return None
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@ -464,7 +464,7 @@ class EngineManager(manager.Manager):
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s.raw_template.parsed_template.template,
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s.id)
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for a in wr.rule[action_map[new_state]]:
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ps.resources[a].alarm()
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ps[a].alarm()
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wr.last_evaluated = now
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@ -17,8 +17,10 @@ import eventlet
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import json
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import itertools
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import logging
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from heat.common import exception
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from heat.engine import checkeddict
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from heat.engine import dependencies
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from heat.engine.resources import Resource
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from heat.db import api as db_api
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@ -69,41 +71,64 @@ class Stack(object):
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if parms is not None:
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self._apply_user_parameters(parms)
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self.resources = {}
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for rname, rdesc in self.t['Resources'].items():
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res = Resource(rname, rdesc, self)
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self.resources[rname] = res
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self.resources = dict((name,
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Resource(name, data, self))
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for (name, data) in self.t['Resources'].items())
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self.calulate_dependencies(res.t, res)
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self.dependencies = dependencies.Dependencies()
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for resource in self.resources.values():
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resource.add_dependencies(self.dependencies)
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def __iter__(self):
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'''
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Return an iterator over this template's resources in the order that
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they should be started.
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'''
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return iter(self.dependencies)
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def __reversed__(self):
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'''
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Return an iterator over this template's resources in the order that
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they should be stopped.
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'''
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return reversed(self.dependencies)
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def __len__(self):
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'''Return the number of resources'''
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return len(self.resources)
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def __getitem__(self, key):
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'''Get the resource with the specified name.'''
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return self.resources[key]
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def __contains__(self, key):
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'''Determine whether the stack contains the specified resource'''
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return key in self.resources
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def keys(self):
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return self.resources.keys()
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def __str__(self):
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return 'Stack "%s"' % self.name
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def validate(self):
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'''
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http://docs.amazonwebservices.com/AWSCloudFormation/latest/ \
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http://docs.amazonwebservices.com/AWSCloudFormation/latest/\
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APIReference/API_ValidateTemplate.html
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'''
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# TODO(sdake) Should return line number of invalid reference
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response = None
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try:
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order = self.get_create_order()
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except KeyError as ex:
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res = 'A Ref operation referenced a non-existent key '\
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'[%s]' % str(ex)
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response = {'ValidateTemplateResult': {
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'Description': 'Malformed Query Response [%s]' % (res),
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'Parameters': []}}
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return response
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for r in order:
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for res in self:
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try:
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res = self.resources[r].validate()
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result = res.validate()
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except Exception as ex:
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logger.exception('validate')
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res = str(ex)
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finally:
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if res:
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err_str = 'Malformed Query Response %s' % (res)
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result = str(ex)
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if result:
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err_str = 'Malformed Query Response %s' % result
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response = {'ValidateTemplateResult': {
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'Description': err_str,
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'Parameters': []}}
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@ -123,33 +148,6 @@ class Stack(object):
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response['ValidateTemplateResult']['Parameters'].append(res)
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return response
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def resource_append_deps(self, resource, order_list):
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'''
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For the given resource first append it's dependancies then
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it's self to order_list.
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'''
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for r in resource.depends_on:
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self.resource_append_deps(self.resources[r], order_list)
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if not resource.name in order_list:
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order_list.append(resource.name)
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def get_create_order(self):
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'''
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return a list of Resource names in the correct order
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for startup.
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'''
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order = []
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for r in self.t['Resources']:
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if self.t['Resources'][r]['Type'] == 'AWS::EC2::Volume' or \
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self.t['Resources'][r]['Type'] == 'AWS::EC2::EIP':
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if len(self.resources[r].depends_on) == 0:
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order.append(r)
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for r in self.t['Resources']:
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self.resource_append_deps(self.resources[r], order)
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return order
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def update_parsed_template(self):
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'''
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Update the parsed template after each resource has been
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@ -180,9 +178,8 @@ class Stack(object):
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def create_blocking(self):
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'''
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create all the resources in the order specified by get_create_order
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Create the stack and all of the resources.
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'''
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order = self.get_create_order()
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self.status_set(self.IN_PROGRESS, 'Stack creation started')
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stack_status = self.CREATE_COMPLETE
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@ -197,8 +194,7 @@ class Stack(object):
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logger.exception('create timeout conversion')
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tmo = eventlet.Timeout(secs_tmo)
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try:
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for r in order:
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res = self.resources[r]
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for res in self:
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if stack_status != self.CREATE_FAILED:
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try:
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res.create()
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@ -236,24 +232,21 @@ class Stack(object):
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def delete_blocking(self):
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'''
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delete all the resources in the reverse order specified by
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get_create_order().
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Delete all of the resources, and then the stack itself.
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'''
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order = self.get_create_order()
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failed = False
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self.status_set(self.DELETE_IN_PROGRESS)
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for r in reversed(order):
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res = self.resources[r]
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for res in reversed(self):
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try:
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res.delete()
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except Exception as ex:
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failed = True
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res.state_set(res.DELETE_FAILED)
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logger.error('delete: %s' % str(ex))
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else:
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try:
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re = db_api.resource_get(self.context, self.resources[r].id)
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re.delete()
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db_api.resource_get(self.context, res.id).delete()
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except Exception as ex:
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# don't fail the delete if the db entry has
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# not been created yet.
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@ -292,23 +285,20 @@ class Stack(object):
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if stack:
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self.parsed_template_id = stack.raw_template.parsed_template.id
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order = []
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self.resource_append_deps(self.resources[resource_name], order)
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deps = self.dependencies[self[resource_name]]
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failed = False
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for r in reversed(order):
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res = self.resources[r]
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for res in reversed(deps):
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try:
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res.delete()
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re = db_api.resource_get(self.context, self.resources[r].id)
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re = db_api.resource_get(self.context, res.id)
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re.delete()
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except Exception as ex:
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failed = True
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res.state_set(res.DELETE_FAILED)
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logger.error('delete: %s' % str(ex))
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for r in order:
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res = self.resources[r]
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for res in deps:
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if not failed:
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try:
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res.create()
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@ -331,26 +321,6 @@ class Stack(object):
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pool = eventlet.GreenPool()
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pool.spawn_n(self.restart_resource_blocking, resource_name)
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def calulate_dependencies(self, s, r):
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if isinstance(s, dict):
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for i in s:
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if i == 'Fn::GetAtt':
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#print '%s seems to depend on %s' % (r.name, s[i][0])
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#r.depends_on.append(s[i][0])
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pass
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elif i == 'Ref':
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#print '%s Refences %s' % (r.name, s[i])
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if r.strict_dependency():
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r.depends_on.append(s[i])
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elif i == 'DependsOn':
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#print '%s DependsOn on %s' % (r.name, s[i])
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r.depends_on.append(s[i])
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else:
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self.calulate_dependencies(s[i], r)
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elif isinstance(s, list):
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for index, item in enumerate(s):
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self.calulate_dependencies(item, r)
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def _apply_user_parameters(self, parms):
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for p in parms:
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if 'Parameters.member.' in p and 'ParameterKey' in p:
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@ -358,7 +328,7 @@ class Stack(object):
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try:
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key_name = 'Parameters.member.%s.ParameterKey' % s[2]
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value_name = 'Parameters.member.%s.ParameterValue' % s[2]
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logger.debug('appling user parameter %s=%s' %
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logger.debug('applying user parameter %s=%s' %
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(key_name, value_name))
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self.parms[parms[key_name]] = parms[value_name]
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except Exception:
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@ -402,15 +372,15 @@ class Stack(object):
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{ "Fn::GetAtt" : [ "DBInstance", "Endpoint.Address" ] }
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'''
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def match_ref(key, value):
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return key == 'Ref' and value in self.resources
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return key == 'Ref' and value in self
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def handle_ref(arg):
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||||
return self.resources[arg].FnGetRefId()
|
||||
return self[arg].FnGetRefId()
|
||||
|
||||
def handle_getatt(args):
|
||||
resource, att = args
|
||||
try:
|
||||
return self.resources[resource].FnGetAtt(att)
|
||||
return self[resource].FnGetAtt(att)
|
||||
except KeyError:
|
||||
raise exception.InvalidTemplateAttribute(resource=resource,
|
||||
key=att)
|
||||
|
|
|
|||
|
|
@ -42,6 +42,9 @@ class Resource(object):
|
|||
UPDATE_FAILED = 'UPDATE_FAILED'
|
||||
UPDATE_COMPLETE = 'UPDATE_COMPLETE'
|
||||
|
||||
# If True, this resource must be created before it can be referenced.
|
||||
strict_dependency = True
|
||||
|
||||
def __new__(cls, name, json, stack):
|
||||
'''Create a new Resource of the appropriate class for its type.'''
|
||||
|
||||
|
|
@ -55,7 +58,6 @@ class Resource(object):
|
|||
return ResourceClass(name, json, stack)
|
||||
|
||||
def __init__(self, name, json_snippet, stack):
|
||||
self.depends_on = []
|
||||
self.references = []
|
||||
self.stack = stack
|
||||
self.name = name
|
||||
|
|
@ -82,6 +84,26 @@ class Resource(object):
|
|||
def parsed_template(self):
|
||||
return self.stack.resolve_runtime_data(self.t)
|
||||
|
||||
def __str__(self):
|
||||
return '%s "%s"' % (self.__class__.__name__, self.name)
|
||||
|
||||
def _add_dependencies(self, deps, fragment):
|
||||
if isinstance(fragment, dict):
|
||||
for key, value in fragment.items():
|
||||
if key in ('DependsOn', 'Ref'):
|
||||
target = self.stack.resources[value]
|
||||
if key == 'DependsOn' or target.strict_dependency:
|
||||
deps += (self, target)
|
||||
elif key != 'Fn::GetAtt':
|
||||
self._add_dependencies(deps, value)
|
||||
elif isinstance(fragment, list):
|
||||
for item in fragment:
|
||||
self._add_dependencies(deps, item)
|
||||
|
||||
def add_dependencies(self, deps):
|
||||
self._add_dependencies(deps, self.t)
|
||||
deps += (self, None)
|
||||
|
||||
def keystone(self):
|
||||
if self._keystone:
|
||||
return self._keystone
|
||||
|
|
@ -187,7 +209,7 @@ class Resource(object):
|
|||
|
||||
def FnGetRefId(self):
|
||||
'''
|
||||
http://docs.amazonwebservices.com/AWSCloudFormation/latest/UserGuide/ \
|
||||
http://docs.amazonwebservices.com/AWSCloudFormation/latest/UserGuide/\
|
||||
intrinsic-function-reference-ref.html
|
||||
'''
|
||||
if self.instance_id is not None:
|
||||
|
|
@ -197,24 +219,18 @@ class Resource(object):
|
|||
|
||||
def FnGetAtt(self, key):
|
||||
'''
|
||||
http://docs.amazonwebservices.com/AWSCloudFormation/latest/UserGuide/ \
|
||||
http://docs.amazonwebservices.com/AWSCloudFormation/latest/UserGuide/\
|
||||
intrinsic-function-reference-getatt.html
|
||||
'''
|
||||
return unicode(self.name)
|
||||
|
||||
def FnBase64(self, data):
|
||||
'''
|
||||
http://docs.amazonwebservices.com/AWSCloudFormation/latest/UserGuide/ \
|
||||
http://docs.amazonwebservices.com/AWSCloudFormation/latest/UserGuide/\
|
||||
intrinsic-function-reference-base64.html
|
||||
'''
|
||||
return base64.b64encode(data)
|
||||
|
||||
def strict_dependency(self):
|
||||
'''
|
||||
If True, this resource must be created before it can be referenced.
|
||||
'''
|
||||
return True
|
||||
|
||||
|
||||
class GenericResource(Resource):
|
||||
properties_schema = {}
|
||||
|
|
|
|||
|
|
@ -0,0 +1,186 @@
|
|||
import nose
|
||||
import unittest
|
||||
from nose.plugins.attrib import attr
|
||||
|
||||
from heat.engine.dependencies import Dependencies
|
||||
from heat.engine.dependencies import CircularDependencyException
|
||||
|
||||
|
||||
@attr(tag=['unit', 'dependencies'])
|
||||
@attr(speed='fast')
|
||||
class dependenciesTest(unittest.TestCase):
|
||||
|
||||
def _dep_test(self, func, checkorder, deps):
|
||||
nodes = set.union(*[set(e) for e in deps])
|
||||
|
||||
d = Dependencies(deps)
|
||||
order = list(func(d))
|
||||
|
||||
for n in nodes:
|
||||
self.assertTrue(n in order, '"%s" is not in the sequence' % n)
|
||||
self.assertEqual(order.count(n), 1)
|
||||
|
||||
self.assertEqual(len(order), len(nodes))
|
||||
|
||||
for l, f in deps:
|
||||
checkorder(order.index(f), order.index(l))
|
||||
|
||||
def _dep_test_fwd(self, *deps):
|
||||
def assertLess(a, b):
|
||||
self.assertTrue(a < b,
|
||||
'"%s" is not less than "%s"' % (str(a), str(b)))
|
||||
self._dep_test(iter, assertLess, deps)
|
||||
|
||||
def _dep_test_rev(self, *deps):
|
||||
def assertGreater(a, b):
|
||||
self.assertTrue(a > b,
|
||||
'"%s" is not greater than "%s"' % (str(a), str(b)))
|
||||
self._dep_test(reversed, assertGreater, deps)
|
||||
|
||||
def test_single_node(self):
|
||||
d = Dependencies([('only', None)])
|
||||
l = list(iter(d))
|
||||
self.assertEqual(len(l), 1)
|
||||
self.assertEqual(l[0], 'only')
|
||||
|
||||
def test_disjoint(self):
|
||||
d = Dependencies([('1', None), ('2', None)])
|
||||
l = list(iter(d))
|
||||
self.assertEqual(len(l), 2)
|
||||
self.assertTrue('1' in l)
|
||||
self.assertTrue('2' in l)
|
||||
|
||||
def test_single_fwd(self):
|
||||
self._dep_test_fwd(('second', 'first'))
|
||||
|
||||
def test_single_rev(self):
|
||||
self._dep_test_rev(('second', 'first'))
|
||||
|
||||
def test_chain_fwd(self):
|
||||
self._dep_test_fwd(('third', 'second'), ('second', 'first'))
|
||||
|
||||
def test_chain_rev(self):
|
||||
self._dep_test_rev(('third', 'second'), ('second', 'first'))
|
||||
|
||||
def test_diamond_fwd(self):
|
||||
self._dep_test_fwd(('last', 'mid1'), ('last', 'mid2'),
|
||||
('mid1', 'first'), ('mid2', 'first'))
|
||||
|
||||
def test_diamond_rev(self):
|
||||
self._dep_test_rev(('last', 'mid1'), ('last', 'mid2'),
|
||||
('mid1', 'first'), ('mid2', 'first'))
|
||||
|
||||
def test_complex_fwd(self):
|
||||
self._dep_test_fwd(('last', 'mid1'), ('last', 'mid2'),
|
||||
('mid1', 'mid3'), ('mid1', 'first'),
|
||||
('mid3', 'first'), ('mid2', 'first'))
|
||||
|
||||
def test_complex_rev(self):
|
||||
self._dep_test_rev(('last', 'mid1'), ('last', 'mid2'),
|
||||
('mid1', 'mid3'), ('mid1', 'first'),
|
||||
('mid3', 'first'), ('mid2', 'first'))
|
||||
|
||||
def test_many_edges_fwd(self):
|
||||
self._dep_test_fwd(('last', 'e1'), ('last', 'mid1'), ('last', 'mid2'),
|
||||
('mid1', 'e2'), ('mid1', 'mid3'),
|
||||
('mid2', 'mid3'),
|
||||
('mid3', 'e3'))
|
||||
|
||||
def test_many_edges_rev(self):
|
||||
self._dep_test_rev(('last', 'e1'), ('last', 'mid1'), ('last', 'mid2'),
|
||||
('mid1', 'e2'), ('mid1', 'mid3'),
|
||||
('mid2', 'mid3'),
|
||||
('mid3', 'e3'))
|
||||
|
||||
def test_dbldiamond_fwd(self):
|
||||
self._dep_test_fwd(('last', 'a1'), ('last', 'a2'),
|
||||
('a1', 'b1'), ('a2', 'b1'), ('a2', 'b2'),
|
||||
('b1', 'first'), ('b2', 'first'))
|
||||
|
||||
def test_dbldiamond_rev(self):
|
||||
self._dep_test_rev(('last', 'a1'), ('last', 'a2'),
|
||||
('a1', 'b1'), ('a2', 'b1'), ('a2', 'b2'),
|
||||
('b1', 'first'), ('b2', 'first'))
|
||||
|
||||
def test_circular_fwd(self):
|
||||
d = Dependencies([('first', 'second'),
|
||||
('second', 'third'),
|
||||
('third', 'first')])
|
||||
self.assertRaises(CircularDependencyException, list, iter(d))
|
||||
|
||||
def test_circular_rev(self):
|
||||
d = Dependencies([('first', 'second'),
|
||||
('second', 'third'),
|
||||
('third', 'first')])
|
||||
self.assertRaises(CircularDependencyException, list, reversed(d))
|
||||
|
||||
def test_self_ref(self):
|
||||
d = Dependencies([('node', 'node')])
|
||||
self.assertRaises(CircularDependencyException, list, iter(d))
|
||||
|
||||
def test_complex_circular_fwd(self):
|
||||
d = Dependencies([('last', 'e1'), ('last', 'mid1'), ('last', 'mid2'),
|
||||
('mid1', 'e2'), ('mid1', 'mid3'),
|
||||
('mid2', 'mid3'),
|
||||
('mid3', 'e3'),
|
||||
('e3', 'mid1')])
|
||||
self.assertRaises(CircularDependencyException, list, iter(d))
|
||||
|
||||
def test_complex_circular_rev(self):
|
||||
d = Dependencies([('last', 'e1'), ('last', 'mid1'), ('last', 'mid2'),
|
||||
('mid1', 'e2'), ('mid1', 'mid3'),
|
||||
('mid2', 'mid3'),
|
||||
('mid3', 'e3'),
|
||||
('e3', 'mid1')])
|
||||
self.assertRaises(CircularDependencyException, list, reversed(d))
|
||||
|
||||
def test_noexist_partial(self):
|
||||
d = Dependencies([('foo', 'bar')])
|
||||
get = lambda i: d[i]
|
||||
self.assertRaises(KeyError, get, 'baz')
|
||||
|
||||
def test_single_partial(self):
|
||||
d = Dependencies([('last', 'first')])
|
||||
p = d['last']
|
||||
l = list(iter(p))
|
||||
self.assertEqual(len(l), 1)
|
||||
self.assertEqual(l[0], 'last')
|
||||
|
||||
def test_simple_partial(self):
|
||||
d = Dependencies([('last', 'middle'), ('middle', 'first')])
|
||||
p = d['middle']
|
||||
order = list(iter(p))
|
||||
self.assertEqual(len(order), 2)
|
||||
for n in ('last', 'middle'):
|
||||
self.assertTrue(n in order,
|
||||
"'%s' not found in dependency order" % n)
|
||||
self.assertTrue(order.index('last') > order.index('middle'))
|
||||
|
||||
def test_simple_multilevel_partial(self):
|
||||
d = Dependencies([('last', 'middle'),
|
||||
('middle', 'target'),
|
||||
('target', 'first')])
|
||||
p = d['target']
|
||||
order = list(iter(p))
|
||||
self.assertEqual(len(order), 3)
|
||||
for n in ('last', 'middle', 'target'):
|
||||
self.assertTrue(n in order,
|
||||
"'%s' not found in dependency order" % n)
|
||||
|
||||
def test_complex_partial(self):
|
||||
d = Dependencies([('last', 'e1'), ('last', 'mid1'), ('last', 'mid2'),
|
||||
('mid1', 'e2'), ('mid1', 'mid3'),
|
||||
('mid2', 'mid3'),
|
||||
('mid3', 'e3')])
|
||||
p = d['mid3']
|
||||
order = list(iter(p))
|
||||
self.assertEqual(len(order), 4)
|
||||
for n in ('last', 'mid1', 'mid2', 'mid3'):
|
||||
self.assertTrue(n in order,
|
||||
"'%s' not found in dependency order" % n)
|
||||
|
||||
|
||||
# allows testing of the test directly, shown below
|
||||
if __name__ == '__main__':
|
||||
sys.argv.append(__file__)
|
||||
nose.main()
|
||||
Loading…
Reference in New Issue