def testIntegerPos(self): lat_long.signbit(5) is False
def testPosZero(self): lat_long.signbit(0.0) is False
def testPos(self): lat_long.signbit(5.0) is False
def testIntegerNeg(self): lat_long.signbit(-5) is True
def testNegZero(self): lat_long.signbit(-0.0) is True
def testNeg(self): lat_long.signbit(-5.0) is True