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"""Tests for the FileChangeCache in loggerhead.changecache."""
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from loggerhead.changecache import FileChangeCache
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class MockEntry(object):
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def __init__(self, revid):
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class MockHistory(object):
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self.fetched_revids = set()
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def get_file_changes_uncached(self, entries):
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self.fetched_revids.add(entry.revid)
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output.append(entry.revid)
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class TestFileChangeCache(object):
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# setup_method and teardown_method are so i can run the tests with
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# py.test and take advantage of the error reporting.
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def setup_method(self, meth):
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def teardown_method(self, meth):
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self.cache_folders = []
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for folder in self.cache_folders:
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def makeHistoryAndEntriesForRevids(self, revids, fill_cache_with=[]):
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cache_folder = tempfile.mkdtemp()
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self.cache_folders.append(cache_folder)
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self.history = MockHistory()
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self.cache = FileChangeCache(self.history, cache_folder)
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self.entries = [MockEntry(revid) for revid in revids]
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self.cache.get_file_changes([entry for entry in self.entries
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if entry.revid in fill_cache_with])
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self.history.fetched_revids.clear()
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def test_empty_cache(self):
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"""An empty cache passes all the revids through to the history object.
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self.makeHistoryAndEntriesForRevids(revids)
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result = self.cache.get_file_changes(self.entries)
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assert result == revids
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assert self.history.fetched_revids == set(revids)
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def test_full_cache(self):
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"""A full cache passes none of the revids through to the history
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self.makeHistoryAndEntriesForRevids(revids, fill_cache_with=revids)
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result = self.cache.get_file_changes(self.entries)
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assert result == revids
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assert self.history.fetched_revids == set()
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def test_partial_cache(self):
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"""A partially full cache passes some of the revids through to the
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history object, and preserves the ordering of the argument list.
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# To test the preservation of argument order code, we put the uncached
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# revid at the beginning, middle and then end of the list of revids
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cached_revids = ['a', 'b']
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revids = cached_revids[:]
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revids.insert(i, 'uncached')
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self.makeHistoryAndEntriesForRevids(
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revids, fill_cache_with=cached_revids)
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result = self.cache.get_file_changes(self.entries)
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assert result == revids
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assert self.history.fetched_revids == set(['uncached'])
added
removed
loggerhead/tests/test_filechangecache.py
