Fix EvalFormatter test for Python 3.4

Changes to string formatting mean slicing in EvalFormatter now works.

IPython/utils/tests/test_text.py

@@ -1,171 +1,177 b''
 # encoding: utf-8
 """Tests for IPython.utils.text"""
 from __future__ import print_function
 
 #-----------------------------------------------------------------------------
 #  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 random
+import sys
 
 import nose.tools as nt
 
 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_equal(out, 'aaaaa  bbbbb  ccccc\n')
     out = text.columnize(items, displaywidth=12)
     nt.assert_equal(out, 'aaaaa  ccccc\nbbbbb\n')
     out = text.columnize(items, displaywidth=10)
     nt.assert_equal(out, 'aaaaa\nbbbbb\nccccc\n')
 
 def test_columnize_random():
     """Test with random input to hopfully catch edge case """
     for nitems in [random.randint(2,70) for i in range(2,20)]:
         displaywidth = random.randint(20,200)
         rand_len = [random.randint(2,displaywidth) for i in range(nitems)]
         items = ['x'*l for l in rand_len]
         out = text.columnize(items, displaywidth=displaywidth)
         longer_line = max([len(x) for x in out.split('\n')])
         longer_element = max(rand_len)
         if longer_line > displaywidth:
             print("Columnize displayed something lager than displaywidth : %s " % longer_line)
             print("longer element : %s " % longer_element)
             print("displaywidth : %s " % displaywidth)
             print("number of element : %s " % nitems)
             print("size of each element :\n %s" % rand_len)
             assert False
 
 def test_columnize_medium():
     """Test with inputs than shouldn't be wider tahn 80 """
     size = 40
     items = [l*size for l in 'abc']
     out = text.columnize(items, displaywidth=80)
     nt.assert_equal(out, '\n'.join(items+['']))
 
 def test_columnize_long():
     """Test columnize with inputs longer than the display window"""
     size = 11
     items = [l*size for l in 'abc']
     out = text.columnize(items, displaywidth=size-1)
     nt.assert_equal(out, '\n'.join(items+['']))
 
 def eval_formatter_check(f):
     ns = dict(n=12, pi=math.pi, stuff='hello there', os=os, u=u"café", b="café")
     s = f.format("{n} {n//4} {stuff.split()[0]}", **ns)
     nt.assert_equal(s, "12 3 hello")
     s = f.format(' '.join(['{n//%i}'%i for i in range(1,8)]), **ns)
     nt.assert_equal(s, "12 6 4 3 2 2 1")
     s = f.format('{[n//i for i in range(1,8)]}', **ns)
     nt.assert_equal(s, "[12, 6, 4, 3, 2, 2, 1]")
     s = f.format("{stuff!s}", **ns)
     nt.assert_equal(s, ns['stuff'])
     s = f.format("{stuff!r}", **ns)
     nt.assert_equal(s, repr(ns['stuff']))
     
     # Check with unicode:
     s = f.format("{u}", **ns)
     nt.assert_equal(s, ns['u'])
     # This decodes in a platform dependent manner, but it shouldn't error out
     s = f.format("{b}", **ns)
         
     nt.assert_raises(NameError, f.format, '{dne}', **ns)
 
 def eval_formatter_slicing_check(f):
     ns = dict(n=12, pi=math.pi, stuff='hello there', os=os)
     s = f.format(" {stuff.split()[:]} ", **ns)
     nt.assert_equal(s, " ['hello', 'there'] ")
     s = f.format(" {stuff.split()[::-1]} ", **ns)
     nt.assert_equal(s, " ['there', 'hello'] ")
     s = f.format("{stuff[::2]}", **ns)
     nt.assert_equal(s, ns['stuff'][::2])
     
     nt.assert_raises(SyntaxError, f.format, "{n:x}", **ns)
 
 def eval_formatter_no_slicing_check(f):
     ns = dict(n=12, pi=math.pi, stuff='hello there', os=os)
     
     s = f.format('{n:x} {pi**2:+f}', **ns)
     nt.assert_equal(s, "c +9.869604")
     
     s = f.format('{stuff[slice(1,4)]}', **ns)
     nt.assert_equal(s, 'ell')
     
-    nt.assert_raises(SyntaxError, f.format, "{a[:]}")
+    if sys.version_info >= (3, 4):
+        # String formatting has changed in Python 3.4, so this now works.
+        s = f.format("{a[:]}", a=[1, 2])
+        nt.assert_equal(s, "[1, 2]")
+    else:
+        nt.assert_raises(SyntaxError, f.format, "{a[:]}")
 
 def test_eval_formatter():
     f = text.EvalFormatter()
     eval_formatter_check(f)
     eval_formatter_no_slicing_check(f)
 
 def test_full_eval_formatter():
     f = text.FullEvalFormatter()
     eval_formatter_check(f)
     eval_formatter_slicing_check(f)
 
 def test_dollar_formatter():
     f = text.DollarFormatter()
     eval_formatter_check(f)
     eval_formatter_slicing_check(f)
     
     ns = dict(n=12, pi=math.pi, stuff='hello there', os=os)
     s = f.format("$n", **ns)
     nt.assert_equal(s, "12")
     s = f.format("$n.real", **ns)
     nt.assert_equal(s, "12")
     s = f.format("$n/{stuff[:5]}", **ns)
     nt.assert_equal(s, "12/hello")
     s = f.format("$n $$HOME", **ns)
     nt.assert_equal(s, "12 $HOME")
     s = f.format("${foo}", foo="HOME")
     nt.assert_equal(s, "$HOME")
 
 
 def test_long_substr():
     data = ['hi']
     nt.assert_equal(text.long_substr(data), 'hi')
 
 
 def test_long_substr2():
     data = ['abc', 'abd', 'abf', 'ab']
     nt.assert_equal(text.long_substr(data), 'ab')
 
 def test_long_substr_empty():
     data = []
     nt.assert_equal(text.long_substr(data), '')
 
 def test_strip_email():
     src = """\
         >> >>> def f(x):
         >> ...   return x+1
         >> ... 
         >> >>> zz = f(2.5)"""
     cln = """\
 >>> def f(x):
 ...   return x+1
 ... 
 >>> zz = f(2.5)"""
     nt.assert_equal(text.strip_email_quotes(src), cln)
 
 
 def test_strip_email2():
     src = '> > > list()'
     cln = 'list()'
     nt.assert_equal(text.strip_email_quotes(src), cln)