Andreas Hocevar
128 lines
3.6 KiB
Python
128 lines
3.6 KiB
Python
#!/usr/bin/env python
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#
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# Copyright 2009 The Closure Library Authors. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Unit test for depstree."""
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__author__ = 'nnaze@google.com (Nathan Naze)'
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import unittest
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import depstree
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def _GetProvides(sources):
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"""Get all namespaces provided by a collection of sources."""
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provides = set()
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for source in sources:
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provides.update(source.provides)
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return provides
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class MockSource(object):
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"""Mock Source file."""
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def __init__(self, provides, requires):
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self.provides = set(provides)
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self.requires = set(requires)
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def __repr__(self):
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return 'MockSource %s' % self.provides
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class DepsTreeTestCase(unittest.TestCase):
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"""Unit test for DepsTree. Tests several common situations and errors."""
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def AssertValidDependencies(self, deps_list):
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"""Validates a dependency list.
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Asserts that a dependency list is valid: For every source in the list,
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ensure that every require is provided by a source earlier in the list.
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Args:
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deps_list: A list of sources that should be in dependency order.
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"""
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for i in range(len(deps_list)):
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source = deps_list[i]
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previous_provides = _GetProvides(deps_list[:i])
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for require in source.requires:
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self.assertTrue(
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require in previous_provides,
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'Namespace "%s" not provided before required by %s' % (
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require, source))
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def testSimpleDepsTree(self):
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a = MockSource(['A'], ['B', 'C'])
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b = MockSource(['B'], [])
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c = MockSource(['C'], ['D'])
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d = MockSource(['D'], ['E'])
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e = MockSource(['E'], [])
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tree = depstree.DepsTree([a, b, c, d, e])
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self.AssertValidDependencies(tree.GetDependencies('A'))
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self.AssertValidDependencies(tree.GetDependencies('B'))
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self.AssertValidDependencies(tree.GetDependencies('C'))
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self.AssertValidDependencies(tree.GetDependencies('D'))
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self.AssertValidDependencies(tree.GetDependencies('E'))
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def testCircularDependency(self):
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# Circular deps
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a = MockSource(['A'], ['B'])
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b = MockSource(['B'], ['C'])
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c = MockSource(['C'], ['A'])
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tree = depstree.DepsTree([a, b, c])
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self.assertRaises(depstree.CircularDependencyError,
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tree.GetDependencies, 'A')
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def testRequiresUndefinedNamespace(self):
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a = MockSource(['A'], ['B'])
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b = MockSource(['B'], ['C'])
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c = MockSource(['C'], ['D']) # But there is no D.
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def MakeDepsTree():
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return depstree.DepsTree([a, b, c])
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self.assertRaises(depstree.NamespaceNotFoundError, MakeDepsTree)
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def testDepsForMissingNamespace(self):
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a = MockSource(['A'], ['B'])
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b = MockSource(['B'], [])
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tree = depstree.DepsTree([a, b])
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# There is no C.
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self.assertRaises(depstree.NamespaceNotFoundError,
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tree.GetDependencies, 'C')
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def testMultipleRequires(self):
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a = MockSource(['A'], ['B'])
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b = MockSource(['B'], ['C'])
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c = MockSource(['C'], [])
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d = MockSource(['D'], ['B'])
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tree = depstree.DepsTree([a, b, c, d])
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self.AssertValidDependencies(tree.GetDependencies(['D', 'A']))
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if __name__ == '__main__':
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unittest.main()
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