188 lines
5.9 KiB
Python
188 lines
5.9 KiB
Python
# -*- coding: utf-8 -*-
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# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright (C) 2012 Yahoo! Inc. All Rights Reserved.
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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 string
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import networkx as nx
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from taskflow import exceptions as exc
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from taskflow.patterns import graph_flow as gf
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from taskflow.patterns import linear_flow as lf
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from taskflow.patterns import unordered_flow as uf
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from taskflow import test
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from taskflow.tests import utils as t_utils
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from taskflow.utils import flow_utils as f_utils
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from taskflow.utils import graph_utils as g_utils
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def _make_many(amount):
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assert amount <= len(string.ascii_lowercase), 'Not enough letters'
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tasks = []
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for i in range(0, amount):
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tasks.append(t_utils.DummyTask(name=string.ascii_lowercase[i]))
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return tasks
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class FlattenTest(test.TestCase):
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def test_linear_flatten(self):
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a, b, c, d = _make_many(4)
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flo = lf.Flow("test")
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flo.add(a, b, c)
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sflo = lf.Flow("sub-test")
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sflo.add(d)
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flo.add(sflo)
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g = f_utils.flatten(flo)
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self.assertEqual(4, len(g))
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order = nx.topological_sort(g)
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self.assertEqual([a, b, c, d], order)
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self.assertTrue(g.has_edge(c, d))
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self.assertEqual([d], list(g_utils.get_no_successors(g)))
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self.assertEqual([a], list(g_utils.get_no_predecessors(g)))
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def test_invalid_flatten(self):
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a, b, c = _make_many(3)
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flo = lf.Flow("test")
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flo.add(a, b, c)
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flo.add(flo)
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self.assertRaises(ValueError, f_utils.flatten, flo)
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def test_unordered_flatten(self):
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a, b, c, d = _make_many(4)
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flo = uf.Flow("test")
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flo.add(a, b, c, d)
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g = f_utils.flatten(flo)
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self.assertEqual(4, len(g))
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self.assertEqual(0, g.number_of_edges())
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self.assertEqual(set([a, b, c, d]),
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set(g_utils.get_no_successors(g)))
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self.assertEqual(set([a, b, c, d]),
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set(g_utils.get_no_predecessors(g)))
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def test_linear_nested_flatten(self):
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a, b, c, d = _make_many(4)
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flo = lf.Flow("test")
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flo.add(a, b)
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flo2 = uf.Flow("test2")
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flo2.add(c, d)
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flo.add(flo2)
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g = f_utils.flatten(flo)
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self.assertEqual(4, len(g))
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lb = g.subgraph([a, b])
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self.assertTrue(lb.has_edge(a, b))
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self.assertFalse(lb.has_edge(b, a))
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ub = g.subgraph([c, d])
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self.assertEqual(0, ub.number_of_edges())
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# This ensures that c and d do not start executing until after b.
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self.assertTrue(g.has_edge(b, c))
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self.assertTrue(g.has_edge(b, d))
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def test_unordered_nested_flatten(self):
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a, b, c, d = _make_many(4)
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flo = uf.Flow("test")
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flo.add(a, b)
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flo2 = lf.Flow("test2")
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flo2.add(c, d)
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flo.add(flo2)
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g = f_utils.flatten(flo)
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self.assertEqual(4, len(g))
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for n in [a, b]:
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self.assertFalse(g.has_edge(n, c))
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self.assertFalse(g.has_edge(n, d))
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self.assertTrue(g.has_edge(c, d))
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self.assertFalse(g.has_edge(d, c))
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ub = g.subgraph([a, b])
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self.assertEqual(0, ub.number_of_edges())
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lb = g.subgraph([c, d])
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self.assertEqual(1, lb.number_of_edges())
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def test_graph_flatten(self):
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a, b, c, d = _make_many(4)
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flo = gf.Flow("test")
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flo.add(a, b, c, d)
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g = f_utils.flatten(flo)
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self.assertEqual(4, len(g))
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self.assertEqual(0, g.number_of_edges())
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def test_graph_flatten_nested(self):
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a, b, c, d, e, f, g = _make_many(7)
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flo = gf.Flow("test")
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flo.add(a, b, c, d)
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flo2 = lf.Flow('test2')
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flo2.add(e, f, g)
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flo.add(flo2)
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g = f_utils.flatten(flo)
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self.assertEqual(7, len(g))
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self.assertEqual(2, g.number_of_edges())
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def test_graph_flatten_nested_graph(self):
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a, b, c, d, e, f, g = _make_many(7)
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flo = gf.Flow("test")
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flo.add(a, b, c, d)
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flo2 = gf.Flow('test2')
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flo2.add(e, f, g)
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flo.add(flo2)
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g = f_utils.flatten(flo)
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self.assertEqual(7, len(g))
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self.assertEqual(0, g.number_of_edges())
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def test_graph_flatten_links(self):
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a, b, c, d = _make_many(4)
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flo = gf.Flow("test")
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flo.add(a, b, c, d)
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flo.link(a, b)
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flo.link(b, c)
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flo.link(c, d)
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g = f_utils.flatten(flo)
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self.assertEqual(4, len(g))
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self.assertEqual(3, g.number_of_edges())
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self.assertEqual(set([a]),
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set(g_utils.get_no_predecessors(g)))
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self.assertEqual(set([d]),
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set(g_utils.get_no_successors(g)))
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def test_flatten_checks_for_dups(self):
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flo = gf.Flow("test").add(
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t_utils.DummyTask(name="a"),
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t_utils.DummyTask(name="a")
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)
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self.assertRaisesRegexp(exc.InvariantViolationException,
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'^Tasks with duplicate names',
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f_utils.flatten, flo)
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def test_flatten_checks_for_dups_globally(self):
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flo = gf.Flow("test").add(
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gf.Flow("int1").add(t_utils.DummyTask(name="a")),
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gf.Flow("int2").add(t_utils.DummyTask(name="a")))
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self.assertRaisesRegexp(exc.InvariantViolationException,
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'^Tasks with duplicate names',
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f_utils.flatten, flo)
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