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from __future__ import print_function
import sys
import ctypes
import textwrap
from nose.tools import assert_equal
from nose_parameterized import parameterized, param
sys.path.append("pp/")
import pp
import pprintpp as p
from pprintpp import Counter, defaultdict, OrderedDict
class PPrintppTestBase(object):
def assertStdout(self, expected, trim=True):
if trim:
expected = textwrap.dedent(expected.rstrip().lstrip("\n"))
# Assumes that nose's capture plugin is active
assert_equal(sys.stdout.getvalue().rstrip(), expected)
class TestPP(PPrintppTestBase):
def test_pp(self):
pp(["hello", "world"])
self.assertStdout("['hello', 'world']")
def test_pp_pprint(self):
pp.pprint("stuff")
self.assertStdout("'stuff'")
def test_fmt(self):
print(pp.pformat("asdf"))
print(pp.fmt("stuff"))
self.assertStdout("""
'asdf'
'stuff'
""")
def test_module_like(self):
print(dir(pp))
print(repr(pp))
class MyDict(dict):
pass
class MyList(list):
pass
class MyTuple(tuple):
pass
class MySet(set):
pass
class MyFrozenSet(frozenset):
pass
class MyOrderedDict(p.OrderedDict):
pass
class MyDefaultDict(p.defaultdict):
pass
class MyCounter(p.Counter):
pass
class MyCounterWithRepr(p.Counter):
def __repr__(self):
return "MyCounterWithRepr('dummy')"
class TestPPrint(PPrintppTestBase):
uni_safe = u"\xe9 \u6f02 \u0e4f \u2661"
uni_unsafe = u"\u200a \u0302 \n"
slashed = lambda s: u"%s'%s'" %(
p.u_prefix,
s.encode("ascii", "backslashreplace").decode("ascii").replace("\n", "\\n")
)
@parameterized([
param("safe", uni_safe, "%s'%s'" %(p.u_prefix, uni_safe)),
param("unsafe", uni_unsafe, slashed(uni_unsafe)),
param("encoding-aware", uni_safe, slashed(uni_safe), encoding="ascii"),
param("high-end-chars", u"\U0002F9B2", slashed(u"\U0002F9B2"), encoding="ascii"),
])
def test_unicode(self, name, input, expected, encoding="utf-8"):
stream = p.TextIO(encoding=encoding)
p.pprint(input, stream=stream)
assert_equal(stream.getvalue().rstrip("\n"), expected)
@parameterized([
param(u"'\\'\"'"),
param(u'"\'"'),
param(u"'\"'"),
param("frozenset(['a', 'b', 'c'])"),
param("set([None, 1, 'a'])"),
param("[]"),
param("[1]"),
param("{}"),
param("{1: 1}"),
param("set()"),
param("set([1])"),
param("frozenset()"),
param("frozenset([1])"),
param("()"),
param("(1, )"),
param("MyDict({})"),
param("MyDict({1: 1})"),
param("MyList([])"),
param("MyList([1])"),
param("MyTuple(())"),
param("MyTuple((1, ))"),
param("MySet()"),
param("MySet([1])"),
param("MyFrozenSet()"),
param("MyFrozenSet([1])"),
] + ([] if not p._test_has_collections else [
param("Counter()"),
param("Counter({1: 1})"),
param("OrderedDict()"),
param("OrderedDict([(1, 1), (5, 5), (2, 2)])"),
param("MyOrderedDict()"),
param("MyOrderedDict([(1, 1)])"),
param("MyCounter()"),
param("MyCounter({1: 1})"),
param("MyCounterWithRepr('dummy')"),
]))
def test_back_and_forth(self, expected):
input = eval(expected)
stream = p.TextIO()
p.pprint(input, stream=stream)
assert_equal(stream.getvalue().rstrip("\n"), expected)
if p._test_has_collections:
@parameterized([
param("defaultdict(%r, {})" %(int, ), defaultdict(int)),
param("defaultdict(%r, {1: 1})" %(int, ), defaultdict(int, [(1, 1)])),
param("MyDefaultDict(%r, {})" %(int, ), MyDefaultDict(int)),
param("MyDefaultDict(%r, {1: 1})" %(int, ), MyDefaultDict(int, [(1, 1)])),
])
def test_expected_input(self, expected, input):
stream = p.TextIO()
p.pprint(input, stream=stream)
assert_equal(stream.getvalue().rstrip("\n"), expected)
def test_unhashable_repr(self):
# In Python 3, C extensions can define a __repr__ method which is an
# instance of `instancemethod`, which is unhashable. It turns out to be
# spectacularly difficult to create an `instancemethod` and attach it to
# a type without using C... so we'll simulate it using a more explicitly
# unhashable type.
# See also: http://stackoverflow.com/q/40876368/71522
class UnhashableCallable(object):
__hash__ = None
def __call__(self):
return "some-repr"
class MyCls(object):
__repr__ = UnhashableCallable()
obj = MyCls()
assert_equal(p.pformat(obj), "some-repr")
if __name__ == "__main__":
import nose
nose.main()
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