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# encoding: utf-8
"""Tests for IPython.utils.text"""
#-----------------------------------------------------------------------------
# Copyright (C) 2011 The IPython Development Team
#
# Distributed under the terms of the BSD License. The full license is in
# the file COPYING, distributed as part of this software.
#-----------------------------------------------------------------------------
#-----------------------------------------------------------------------------
# Imports
#-----------------------------------------------------------------------------
import os
import math
import nose.tools as nt
from nose import with_setup
from IPython.testing import decorators as dec
from IPython.utils import text
#-----------------------------------------------------------------------------
# Globals
#-----------------------------------------------------------------------------
def test_columnize():
"""Basic columnize tests."""
size = 5
items = [l*size for l in 'abc']
out = text.columnize(items, displaywidth=80)
nt.assert_equals(out, 'aaaaa bbbbb ccccc\n')
out = text.columnize(items, displaywidth=10)
nt.assert_equals(out, 'aaaaa ccccc\nbbbbb\n')
def test_columnize_long():
"""Test columnize with inputs longer than the display window"""
text.columnize(['a'*81, 'b'*81], displaywidth=80)
size = 11
items = [l*size for l in 'abc']
out = text.columnize(items, displaywidth=size-1)
nt.assert_equals(out, '\n'.join(items+['']))
def test_eval_formatter():
f = text.EvalFormatter()
ns = dict(n=12, pi=math.pi, stuff='hello there', os=os)
s = f.format("{n} {n/4} {stuff.split()[0]}", **ns)
nt.assert_equals(s, "12 3 hello")
s = f.format(' '.join(['{n//%i}'%i for i in range(1,8)]), **ns)
nt.assert_equals(s, "12 6 4 3 2 2 1")
s = f.format('{[n//i for i in range(1,8)]}', **ns)
nt.assert_equals(s, "[12, 6, 4, 3, 2, 2, 1]")
s = f.format("{stuff!s}", **ns)
nt.assert_equals(s, ns['stuff'])
s = f.format("{stuff!r}", **ns)
nt.assert_equals(s, repr(ns['stuff']))
nt.assert_raises(NameError, f.format, '{dne}', **ns)
def test_eval_formatter_slicing():
f = text.EvalFormatter()
f.allow_slicing = True
ns = dict(n=12, pi=math.pi, stuff='hello there', os=os)
s = f.format(" {stuff.split()[:]} ", **ns)
nt.assert_equals(s, " ['hello', 'there'] ")
s = f.format(" {stuff.split()[::-1]} ", **ns)
nt.assert_equals(s, " ['there', 'hello'] ")
s = f.format("{stuff[::2]}", **ns)
nt.assert_equals(s, ns['stuff'][::2])
nt.assert_raises(SyntaxError, f.format, "{n:x}", **ns)
def test_eval_formatter_no_slicing():
f = text.EvalFormatter()
f.allow_slicing = False
ns = dict(n=12, pi=math.pi, stuff='hello there', os=os)
s = f.format('{n:x} {pi**2:+f}', **ns)
nt.assert_equals(s, "c +9.869604")
nt.assert_raises(SyntaxError, f.format, "{a[:]}")
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