def testHashWithFeatureOnRight(self):
"""
The database hash function must return the expected (positive offset)
hash when the second feature is to the right of the first.
"""
dbParams = DatabaseParameters(landmarks=[], trigPoints=[])
be = Backend()
be.configure(dbParams)
landmark = Landmark('name', 'A', 20, 0)
trigPoint = TrigPoint('name', 'B', 30)
distance10 = str(scaleLog(10, _DEFAULT_DISTANCE_BASE))
self.assertEqual('A:B:' + distance10, be.hash(landmark, trigPoint))
def testHashWithSymbolDetail(self):
"""
The database hash function must return the expected value when the
landmark it is passed has a repeat count.
"""
dbParams = DatabaseParameters(landmarks=[], trigPoints=[])
be = Backend()
be.configure(dbParams)
landmark = Landmark('name', 'A', 20, 0, 5)
trigPoint = TrigPoint('name', 'B', 30)
distance10 = str(scaleLog(10, _DEFAULT_DISTANCE_BASE))
self.assertEqual('A5:B:' + distance10, be.hash(landmark, trigPoint))
def testHashWithFeatureOnRightAndNonDefaultDistanceBase(self):
"""
The database hash function must return the expected hash when the
database has a non-default distance base and the second feature is to
the right of the first.
"""
dbParams = DatabaseParameters(landmarks=[], trigPoints=[],
distanceBase=1.5)
be = Backend()
be.configure(dbParams)
landmark = Landmark('name', 'A', 20, 0)
trigPoint = TrigPoint('name', 'B', 30)
distance10 = str(scaleLog(10, 1.5))
self.assertEqual('A:B:' + distance10, be.hash(landmark, trigPoint))
