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# Copyright (C) 2012 Codethink Limited
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
import unittest
import morphlib
class FakeSource(object):
pass
class BuildOrderTests(unittest.TestCase):
def test_empty_list_results_in_no_groups_at_all(self):
order = morphlib.buildorder.BuildOrder([])
self.assertEqual(len(order.groups), 0)
def test_list_with_one_artifact_results_in_one_group(self):
chunk = FakeSource()
artifact = morphlib.artifact.Artifact(chunk, 'chunk')
order = morphlib.buildorder.BuildOrder([artifact])
self.assertEqual(len(order.groups), 1)
self.assertEqual(order.groups[0], [artifact])
def test_list_with_two_unrelated_artifacts_results_in_one_group(self):
chunk1 = FakeSource()
artifact1 = morphlib.artifact.Artifact(chunk1, 'chunk1')
chunk2 = FakeSource()
artifact2 = morphlib.artifact.Artifact(chunk2, 'chunk2')
order = morphlib.buildorder.BuildOrder([artifact1, artifact2])
self.assertEqual(len(order.groups), 1)
self.assertEqual(order.groups[0], [artifact1, artifact2])
def test_list_with_two_dependent_artifacts_results_in_two_groups(self):
chunk1 = FakeSource()
artifact1 = morphlib.artifact.Artifact(chunk1, 'chunk1')
chunk2 = FakeSource()
artifact2 = morphlib.artifact.Artifact(chunk2, 'chunk2')
artifact2.add_dependency(artifact1)
order = morphlib.buildorder.BuildOrder([artifact1, artifact2])
self.assertEqual(len(order.groups), 2)
self.assertEqual(order.groups[0], [artifact1])
self.assertEqual(order.groups[1], [artifact2])
def test_chain_of_three_dependent_artifacts_results_in_three_groups(self):
chunk1 = FakeSource()
artifact1 = morphlib.artifact.Artifact(chunk1, 'chunk1')
chunk2 = FakeSource()
artifact2 = morphlib.artifact.Artifact(chunk2, 'chunk2')
artifact2.add_dependency(artifact1)
chunk3 = FakeSource()
artifact3 = morphlib.artifact.Artifact(chunk3, 'chunk3')
artifact3.add_dependency(artifact2)
order = morphlib.buildorder.BuildOrder(
[artifact1, artifact2, artifact3])
self.assertEqual(len(order.groups), 3)
self.assertEqual(order.groups[0], [artifact1])
self.assertEqual(order.groups[1], [artifact2])
self.assertEqual(order.groups[2], [artifact3])
def test_two_artifacts_depending_on_another_results_in_two_groups(self):
chunk1 = FakeSource()
artifact1 = morphlib.artifact.Artifact(chunk1, 'chunk1')
chunk2 = FakeSource()
artifact2 = morphlib.artifact.Artifact(chunk2, 'chunk2')
artifact2.add_dependency(artifact1)
chunk3 = FakeSource()
artifact3 = morphlib.artifact.Artifact(chunk3, 'chunk3')
artifact3.add_dependency(artifact1)
order = morphlib.buildorder.BuildOrder(
[artifact1, artifact2, artifact3])
self.assertEqual(len(order.groups), 2)
self.assertEqual(order.groups[0], [artifact1])
self.assertEqual(order.groups[1], [artifact2, artifact3])
def test_one_artifact_depending_on_two_others_results_in_two_groups(self):
chunk1 = FakeSource()
artifact1 = morphlib.artifact.Artifact(chunk1, 'chunk1')
chunk2 = FakeSource()
artifact2 = morphlib.artifact.Artifact(chunk2, 'chunk2')
chunk3 = FakeSource()
artifact3 = morphlib.artifact.Artifact(chunk3, 'chunk3')
artifact3.add_dependency(artifact1)
artifact3.add_dependency(artifact2)
order = morphlib.buildorder.BuildOrder(
[artifact1, artifact2, artifact3])
self.assertEqual(len(order.groups), 2)
self.assertEqual(order.groups[0], [artifact1, artifact2])
self.assertEqual(order.groups[1], [artifact3])
def test_detection_of_cyclic_dependency_chain(self):
chunk1 = FakeSource()
artifact1 = morphlib.artifact.Artifact(chunk1, 'chunk1')
chunk2 = FakeSource()
artifact2 = morphlib.artifact.Artifact(chunk2, 'chunk2')
chunk3 = FakeSource()
artifact3 = morphlib.artifact.Artifact(chunk3, 'chunk3')
artifact1.add_dependency(artifact3)
artifact2.add_dependency(artifact1)
artifact3.add_dependency(artifact2)
self.assertRaises(morphlib.buildorder.CyclicDependencyChainError,
morphlib.buildorder.BuildOrder,
[artifact1, artifact2, artifact3])
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