def testCreateDefault(self):
"""Simply create a default object."""
n = FixedPoint();
self.assertEquals(n.get_precision(), DEFAULT_PRECISION)
self.assertEquals(long(n), 0)
n = SonOfFixedPoint();
self.assertEquals(n.get_precision(), DEFAULT_PRECISION)
self.assertEquals(long(n), 0)
def testSetAndGetPrecision(self):
"""Change and retrieve the precision of an existin object"""
# try a floating point number with a negative exponent
n = FixedPoint(42.3e-1);
self.assertEquals(n.get_precision(), DEFAULT_PRECISION)
self.assertEquals(n.precision, DEFAULT_PRECISION)
self.assertEquals(n.n, 423L)
n = SonOfFixedPoint(42.3e-1);
self.assertEquals(n.get_precision(), DEFAULT_PRECISION)
self.assertEquals(n.precision, DEFAULT_PRECISION)
self.assertEquals(n.n, 423L)
# try something that's not a number
self.failUnlessRaises(TypeError, n.set_precision, object);
self.failUnlessRaises(TypeError, n.precision, object);
# try a negative number
self.failUnlessRaises(ValueError, n.set_precision, -3);
# try a precision greater than we started with
newprecision = DEFAULT_PRECISION + 1
n.set_precision(newprecision)
self.assertEquals(n.get_precision(), newprecision)
self.assertEquals(n.n, 4230L)
precision = n.precision + 1
n.precision += 1
self.assertEquals(n.precision, precision)
# try a precision less than we started with
newprecision = DEFAULT_PRECISION - 1
n.set_precision(newprecision)
self.assertEquals(n.get_precision(), newprecision)
self.assertEquals(n.n, 42)
def test__repr__(self):
"""test representation"""
REPR_FORMAT = "FixedPoint('%s', %d)"
# try the default
n = FixedPoint()
self.assertEquals(repr(n), REPR_FORMAT % (str(n), n.get_precision()))
# try a floating point number with a negative exponent
n = FixedPoint(42.3e-1);
self.assertEquals(repr(n), REPR_FORMAT % (str(n), n.get_precision()))
# try a negative floating point number
n = FixedPoint(-4.23);
self.assertEquals(repr(n), REPR_FORMAT % (str(n), n.get_precision()))
# try an int
n = FixedPoint(1, 0);
self.assertEquals(repr(n), REPR_FORMAT % (str(n), n.get_precision()))
SON_OF_FORMAT = "SonOfFixedPoint('%s', %d)"
# try the default
n = SonOfFixedPoint()
self.assertEquals(repr(n), SON_OF_FORMAT % (str(n), n.get_precision()))
# try a floating point number with a negative exponent
n = SonOfFixedPoint(42.3e-1);
self.assertEquals(repr(n), SON_OF_FORMAT % (str(n), n.get_precision()))
# try a negative floating point number
n = SonOfFixedPoint(-4.23);
self.assertEquals(repr(n), SON_OF_FORMAT % (str(n), n.get_precision()))
# try an int
n = SonOfFixedPoint(1, 0);
self.assertEquals(repr(n), SON_OF_FORMAT % (str(n), n.get_precision()))
