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# -*- coding: utf-8 -*-
# Copyright (C) 2014 Yahoo! Inc. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
from taskflow.patterns import unordered_flow as uf
from taskflow import retry
from taskflow import test
from taskflow.tests import utils
def _task(name, provides=None, requires=None):
return utils.ProvidesRequiresTask(name, provides, requires)
class UnorderedFlowTest(test.TestCase):
def test_unordered_flow_stringy(self):
f = uf.Flow('test')
expected = '"unordered_flow.Flow: test(len=0)"'
self.assertEqual(expected, str(f))
task1 = _task(name='task1')
task2 = _task(name='task2')
task3 = _task(name='task3')
f = uf.Flow('test')
f.add(task1, task2, task3)
expected = '"unordered_flow.Flow: test(len=3)"'
self.assertEqual(expected, str(f))
def test_unordered_flow_starts_as_empty(self):
f = uf.Flow('test')
self.assertEqual(0, len(f))
self.assertEqual([], list(f))
self.assertEqual([], list(f.iter_links()))
self.assertEqual(set(), f.requires)
self.assertEqual(set(), f.provides)
def test_unordered_flow_add_nothing(self):
f = uf.Flow('test')
result = f.add()
self.assertIs(f, result)
self.assertEqual(0, len(f))
def test_unordered_flow_one_task(self):
f = uf.Flow('test')
task = _task(name='task1', requires=['a', 'b'], provides=['c', 'd'])
result = f.add(task)
self.assertIs(f, result)
self.assertEqual(1, len(f))
self.assertEqual([task], list(f))
self.assertEqual([], list(f.iter_links()))
self.assertEqual(set(['a', 'b']), f.requires)
self.assertEqual(set(['c', 'd']), f.provides)
def test_unordered_flow_two_tasks(self):
task1 = _task(name='task1')
task2 = _task(name='task2')
f = uf.Flow('test').add(task1, task2)
self.assertEqual(2, len(f))
self.assertEqual(set([task1, task2]), set(f))
self.assertEqual([], list(f.iter_links()))
def test_unordered_flow_two_tasks_two_different_calls(self):
task1 = _task(name='task1', provides=['a'])
task2 = _task(name='task2', requires=['a'])
f = uf.Flow('test').add(task1)
f.add(task2)
self.assertEqual(2, len(f))
self.assertEqual(set(['a']), f.requires)
self.assertEqual(set(['a']), f.provides)
def test_unordered_flow_two_tasks_reverse_order(self):
task1 = _task(name='task1', provides=['a'])
task2 = _task(name='task2', requires=['a'])
f = uf.Flow('test').add(task2).add(task1)
self.assertEqual(2, len(f))
self.assertEqual(set(['a']), f.requires)
self.assertEqual(set(['a']), f.provides)
def test_unordered_flow_two_task_same_provide(self):
task1 = _task(name='task1', provides=['a', 'b'])
task2 = _task(name='task2', provides=['a', 'c'])
f = uf.Flow('test')
f.add(task2, task1)
self.assertEqual(2, len(f))
def test_unordered_flow_with_retry(self):
ret = retry.AlwaysRevert(requires=['a'], provides=['b'])
f = uf.Flow('test', ret)
self.assertIs(f.retry, ret)
self.assertEqual('test_retry', ret.name)
self.assertEqual(set(['a']), f.requires)
self.assertEqual(set(['b']), f.provides)
def test_unordered_flow_with_retry_fully_satisfies(self):
ret = retry.AlwaysRevert(provides=['b', 'a'])
f = uf.Flow('test', ret)
f.add(_task(name='task1', requires=['a']))
self.assertIs(f.retry, ret)
self.assertEqual('test_retry', ret.name)
self.assertEqual(set([]), f.requires)
self.assertEqual(set(['b', 'a']), f.provides)
def test_iter_nodes(self):
task1 = _task(name='task1', provides=['a', 'b'])
task2 = _task(name='task2', provides=['a', 'c'])
tasks = set([task1, task2])
f = uf.Flow('test')
f.add(task2, task1)
for (node, data) in f.iter_nodes():
self.assertTrue(node in tasks)
self.assertDictEqual({}, data)
def test_iter_links(self):
task1 = _task(name='task1', provides=['a', 'b'])
task2 = _task(name='task2', provides=['a', 'c'])
f = uf.Flow('test')
f.add(task2, task1)
for (u, v, data) in f.iter_links():
raise AssertionError('links iterator should be empty')
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