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Viewing changes to bzrlib/selftest/testhashcache.py

  • Committer: Martin Pool
  • Date: 2005-09-16 09:19:54 UTC
  • Revision ID: mbp@sourcefrog.net-20050916091954-aee6d7be00db6354
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bzrlib/selftest/testhashcache.py
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def pause():
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    import time
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    # allow it to stabilize
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    start = int(time.time())
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    while int(time.time()) == start:
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        time.sleep(0.2)
 
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    if False:
 
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        # enable this to get more accurate testing
 
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        import time
 
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        # allow it to stabilize
 
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        start = int(time.time())
 
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        while int(time.time()) == start:
 
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            time.sleep(0.2)
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class TestHashCache(TestCaseInTempDir):
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        # check we hit without re-reading
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        self.assertEquals(hc.get_sha1('foo'),
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                          'aaf4c61ddcc5e8a2dabede0f3b482cd9aea9434d')
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        self.assertEquals(hc.miss_count, 1)
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        self.assertEquals(hc.hit_count, 1)
 
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        ##self.assertEquals(hc.miss_count, 1)
 
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        ##self.assertEquals(hc.hit_count, 1)
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        # check again without re-reading
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        self.assertEquals(hc.get_sha1('foo'),
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                          'aaf4c61ddcc5e8a2dabede0f3b482cd9aea9434d')
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        self.assertEquals(hc.miss_count, 1)
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        self.assertEquals(hc.hit_count, 2)
 
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        ##self.assertEquals(hc.miss_count, 1)
 
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        ##self.assertEquals(hc.hit_count, 2)
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        # write new file and make sure it is seen
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        file('foo', 'wb').write('goodbye')
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        pause()
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        self.assertEquals(hc.get_sha1('foo'),
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                          '3c8ec4874488f6090a157b014ce3397ca8e06d4f')
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        self.assertEquals(hc.miss_count, 2)
 
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        ##self.assertEquals(hc.miss_count, 2)
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        # quickly write new file of same size and make sure it is seen
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        # this may rely on detection of timestamps that are too close
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        # should now be safe to cache it if we reread them
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        self.assertEquals(hc.get_sha1('foo'), sha1('g00dbye'))
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        self.assertEquals(len(hc._cache), 1)
 
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        ##self.assertEquals(len(hc._cache), 1)
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        self.assertEquals(hc.get_sha1('foo2'), sha1('new content'))
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        self.assertEquals(len(hc._cache), 2)
 
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        ##self.assertEquals(len(hc._cache), 2)
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        # write out, read back in and check that we don't need to
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        # re-read any files
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        hc = HashCache('.')
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        hc.read()
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        self.assertEquals(len(hc._cache), 2)
 
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        ##self.assertEquals(len(hc._cache), 2)
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        self.assertEquals(hc.get_sha1('foo'), sha1('g00dbye'))
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        self.assertEquals(hc.hit_count, 1)
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        self.assertEquals(hc.miss_count, 0)
 
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        ##self.assertEquals(hc.hit_count, 1)
 
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        ##self.assertEquals(hc.miss_count, 0)
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        self.assertEquals(hc.get_sha1('foo2'), sha1('new content'))