|
|
"""Tests for the Formatters.
|
|
|
"""
|
|
|
|
|
|
from math import pi
|
|
|
|
|
|
try:
|
|
|
import numpy
|
|
|
except:
|
|
|
numpy = None
|
|
|
import nose.tools as nt
|
|
|
|
|
|
from IPython.core.formatters import PlainTextFormatter
|
|
|
|
|
|
class A(object):
|
|
|
def __repr__(self):
|
|
|
return 'A()'
|
|
|
|
|
|
class B(A):
|
|
|
def __repr__(self):
|
|
|
return 'B()'
|
|
|
|
|
|
class BadPretty(object):
|
|
|
_repr_pretty_ = None
|
|
|
|
|
|
class GoodPretty(object):
|
|
|
def _repr_pretty_(self, pp, cycle):
|
|
|
pp.text('foo')
|
|
|
|
|
|
def __repr__(self):
|
|
|
return 'GoodPretty()'
|
|
|
|
|
|
def foo_printer(obj, pp, cycle):
|
|
|
pp.text('foo')
|
|
|
|
|
|
def test_pretty():
|
|
|
f = PlainTextFormatter()
|
|
|
f.for_type(A, foo_printer)
|
|
|
nt.assert_equal(f(A()), 'foo')
|
|
|
nt.assert_equal(f(B()), 'foo')
|
|
|
nt.assert_equal(f(GoodPretty()), 'foo')
|
|
|
# Just don't raise an exception for the following:
|
|
|
f(BadPretty())
|
|
|
|
|
|
f.pprint = False
|
|
|
nt.assert_equal(f(A()), 'A()')
|
|
|
nt.assert_equal(f(B()), 'B()')
|
|
|
nt.assert_equal(f(GoodPretty()), 'GoodPretty()')
|
|
|
|
|
|
|
|
|
def test_deferred():
|
|
|
f = PlainTextFormatter()
|
|
|
|
|
|
def test_precision():
|
|
|
"""test various values for float_precision."""
|
|
|
f = PlainTextFormatter()
|
|
|
nt.assert_equal(f(pi), repr(pi))
|
|
|
f.float_precision = 0
|
|
|
if numpy:
|
|
|
po = numpy.get_printoptions()
|
|
|
nt.assert_equal(po['precision'], 0)
|
|
|
nt.assert_equal(f(pi), '3')
|
|
|
f.float_precision = 2
|
|
|
if numpy:
|
|
|
po = numpy.get_printoptions()
|
|
|
nt.assert_equal(po['precision'], 2)
|
|
|
nt.assert_equal(f(pi), '3.14')
|
|
|
f.float_precision = '%g'
|
|
|
if numpy:
|
|
|
po = numpy.get_printoptions()
|
|
|
nt.assert_equal(po['precision'], 2)
|
|
|
nt.assert_equal(f(pi), '3.14159')
|
|
|
f.float_precision = '%e'
|
|
|
nt.assert_equal(f(pi), '3.141593e+00')
|
|
|
f.float_precision = ''
|
|
|
if numpy:
|
|
|
po = numpy.get_printoptions()
|
|
|
nt.assert_equal(po['precision'], 8)
|
|
|
nt.assert_equal(f(pi), repr(pi))
|
|
|
|
|
|
def test_bad_precision():
|
|
|
"""test various invalid values for float_precision."""
|
|
|
f = PlainTextFormatter()
|
|
|
def set_fp(p):
|
|
|
f.float_precision=p
|
|
|
nt.assert_raises(ValueError, set_fp, '%')
|
|
|
nt.assert_raises(ValueError, set_fp, '%.3f%i')
|
|
|
nt.assert_raises(ValueError, set_fp, 'foo')
|
|
|
nt.assert_raises(ValueError, set_fp, -1)
|
|
|
|
|
|
|
|
|
|
