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test_interactivshell.py
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test_interactivshell.py
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# -*- coding: utf-8 -*-
"""Tests for the key interactiveshell module.
Authors
-------
* Julian Taylor
"""
#-----------------------------------------------------------------------------
# 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
#-----------------------------------------------------------------------------
# stdlib
import sys
import types
import unittest
from IPython.core.inputtransformer import InputTransformer
from IPython.testing.decorators import skipif
from IPython.utils import py3compat
from IPython.testing import tools as tt
# Decorator for interaction loop tests -----------------------------------------
class mock_input_helper(object):
"""Machinery for tests of the main interact loop.
Used by the mock_input decorator.
"""
def __init__(self, testgen):
self.testgen = testgen
self.exception = None
self.ip = get_ipython()
def __enter__(self):
self.orig_raw_input = self.ip.raw_input
self.ip.raw_input = self.fake_input
return self
def __exit__(self, etype, value, tb):
self.ip.raw_input = self.orig_raw_input
def fake_input(self, prompt):
try:
return next(self.testgen)
except StopIteration:
self.ip.exit_now = True
return u''
except:
self.exception = sys.exc_info()
self.ip.exit_now = True
return u''
def mock_input(testfunc):
"""Decorator for tests of the main interact loop.
Write the test as a generator, yield-ing the input strings, which IPython
will see as if they were typed in at the prompt.
"""
def test_method(self):
testgen = testfunc(self)
with mock_input_helper(testgen) as mih:
mih.ip.interact(display_banner=False)
if mih.exception is not None:
# Re-raise captured exception
etype, value, tb = mih.exception
import traceback
traceback.print_tb(tb, file=sys.stdout)
del tb # Avoid reference loop
raise value
return test_method
# Test classes -----------------------------------------------------------------
class InteractiveShellTestCase(unittest.TestCase):
def rl_hist_entries(self, rl, n):
"""Get last n readline history entries as a list"""
return [rl.get_history_item(rl.get_current_history_length() - x)
for x in range(n - 1, -1, -1)]
def test_runs_without_rl(self):
"""Test that function does not throw without readline"""
ip = get_ipython()
ip.has_readline = False
ip.readline = None
ip._replace_rlhist_multiline(u'source', 0)
@skipif(not get_ipython().has_readline, 'no readline')
def test_runs_without_remove_history_item(self):
"""Test that function does not throw on windows without
remove_history_item"""
ip = get_ipython()
if hasattr(ip.readline, 'remove_history_item'):
del ip.readline.remove_history_item
ip._replace_rlhist_multiline(u'source', 0)
@skipif(not get_ipython().has_readline, 'no readline')
@skipif(not hasattr(get_ipython().readline, 'remove_history_item'),
'no remove_history_item')
def test_replace_multiline_hist_disabled(self):
"""Test that multiline replace does nothing if disabled"""
ip = get_ipython()
ip.multiline_history = False
ghist = [u'line1', u'line2']
for h in ghist:
ip.readline.add_history(h)
hlen_b4_cell = ip.readline.get_current_history_length()
hlen_b4_cell = ip._replace_rlhist_multiline(u'sourc€\nsource2',
hlen_b4_cell)
self.assertEqual(ip.readline.get_current_history_length(),
hlen_b4_cell)
hist = self.rl_hist_entries(ip.readline, 2)
self.assertEqual(hist, ghist)
@skipif(not get_ipython().has_readline, 'no readline')
@skipif(not hasattr(get_ipython().readline, 'remove_history_item'),
'no remove_history_item')
def test_replace_multiline_hist_adds(self):
"""Test that multiline replace function adds history"""
ip = get_ipython()
hlen_b4_cell = ip.readline.get_current_history_length()
hlen_b4_cell = ip._replace_rlhist_multiline(u'sourc€', hlen_b4_cell)
self.assertEqual(hlen_b4_cell,
ip.readline.get_current_history_length())
@skipif(not get_ipython().has_readline, 'no readline')
@skipif(not hasattr(get_ipython().readline, 'remove_history_item'),
'no remove_history_item')
def test_replace_multiline_hist_keeps_history(self):
"""Test that multiline replace does not delete history"""
ip = get_ipython()
ip.multiline_history = True
ghist = [u'line1', u'line2']
for h in ghist:
ip.readline.add_history(h)
#start cell
hlen_b4_cell = ip.readline.get_current_history_length()
# nothing added to rl history, should do nothing
hlen_b4_cell = ip._replace_rlhist_multiline(u'sourc€\nsource2',
hlen_b4_cell)
self.assertEqual(ip.readline.get_current_history_length(),
hlen_b4_cell)
hist = self.rl_hist_entries(ip.readline, 2)
self.assertEqual(hist, ghist)
@skipif(not get_ipython().has_readline, 'no readline')
@skipif(not hasattr(get_ipython().readline, 'remove_history_item'),
'no remove_history_item')
def test_replace_multiline_hist_replaces_twice(self):
"""Test that multiline entries are replaced twice"""
ip = get_ipython()
ip.multiline_history = True
ip.readline.add_history(u'line0')
#start cell
hlen_b4_cell = ip.readline.get_current_history_length()
ip.readline.add_history('l€ne1')
ip.readline.add_history('line2')
#replace cell with single line
hlen_b4_cell = ip._replace_rlhist_multiline(u'l€ne1\nline2',
hlen_b4_cell)
ip.readline.add_history('l€ne3')
ip.readline.add_history('line4')
#replace cell with single line
hlen_b4_cell = ip._replace_rlhist_multiline(u'l€ne3\nline4',
hlen_b4_cell)
self.assertEqual(ip.readline.get_current_history_length(),
hlen_b4_cell)
hist = self.rl_hist_entries(ip.readline, 3)
expected = [u'line0', u'l€ne1\nline2', u'l€ne3\nline4']
# perform encoding, in case of casting due to ASCII locale
enc = sys.stdin.encoding or "utf-8"
expected = [ py3compat.unicode_to_str(e, enc) for e in expected ]
self.assertEqual(hist, expected)
@skipif(not get_ipython().has_readline, 'no readline')
@skipif(not hasattr(get_ipython().readline, 'remove_history_item'),
'no remove_history_item')
def test_replace_multiline_hist_replaces_empty_line(self):
"""Test that multiline history skips empty line cells"""
ip = get_ipython()
ip.multiline_history = True
ip.readline.add_history(u'line0')
#start cell
hlen_b4_cell = ip.readline.get_current_history_length()
ip.readline.add_history('l€ne1')
ip.readline.add_history('line2')
hlen_b4_cell = ip._replace_rlhist_multiline(u'l€ne1\nline2',
hlen_b4_cell)
ip.readline.add_history('')
hlen_b4_cell = ip._replace_rlhist_multiline(u'', hlen_b4_cell)
ip.readline.add_history('l€ne3')
hlen_b4_cell = ip._replace_rlhist_multiline(u'l€ne3', hlen_b4_cell)
ip.readline.add_history(' ')
hlen_b4_cell = ip._replace_rlhist_multiline(' ', hlen_b4_cell)
ip.readline.add_history('\t')
ip.readline.add_history('\t ')
hlen_b4_cell = ip._replace_rlhist_multiline('\t', hlen_b4_cell)
ip.readline.add_history('line4')
hlen_b4_cell = ip._replace_rlhist_multiline(u'line4', hlen_b4_cell)
self.assertEqual(ip.readline.get_current_history_length(),
hlen_b4_cell)
hist = self.rl_hist_entries(ip.readline, 4)
# expect no empty cells in history
expected = [u'line0', u'l€ne1\nline2', u'l€ne3', u'line4']
# perform encoding, in case of casting due to ASCII locale
enc = sys.stdin.encoding or "utf-8"
expected = [ py3compat.unicode_to_str(e, enc) for e in expected ]
self.assertEqual(hist, expected)
@mock_input
def test_inputtransformer_syntaxerror(self):
ip = get_ipython()
transformer = SyntaxErrorTransformer()
ip.input_splitter.python_line_transforms.append(transformer)
ip.input_transformer_manager.python_line_transforms.append(transformer)
try:
#raise Exception
with tt.AssertPrints('4', suppress=False):
yield u'print(2*2)'
with tt.AssertPrints('SyntaxError: input contains', suppress=False):
yield u'print(2345) # syntaxerror'
with tt.AssertPrints('16', suppress=False):
yield u'print(4*4)'
finally:
ip.input_splitter.python_line_transforms.remove(transformer)
ip.input_transformer_manager.python_line_transforms.remove(transformer)
class SyntaxErrorTransformer(InputTransformer):
def push(self, line):
pos = line.find('syntaxerror')
if pos >= 0:
e = SyntaxError('input contains "syntaxerror"')
e.text = line
e.offset = pos + 1
raise e
return line
def reset(self):
pass
class TerminalMagicsTestCase(unittest.TestCase):
def test_paste_magics_message(self):
"""Test that an IndentationError while using paste magics doesn't
trigger a message about paste magics and also the opposite."""
ip = get_ipython()
s = ('for a in range(5):\n'
'print(a)')
tm = ip.magics_manager.registry['TerminalMagics']
with tt.AssertPrints("If you want to paste code into IPython, try the "
"%paste and %cpaste magic functions."):
ip.run_cell(s)
with tt.AssertNotPrints("If you want to paste code into IPython, try the "
"%paste and %cpaste magic functions."):
tm.store_or_execute(s, name=None)
def test_paste_magics_blankline(self):
"""Test that code with a blank line doesn't get split (gh-3246)."""
ip = get_ipython()
s = ('def pasted_func(a):\n'
' b = a+1\n'
'\n'
' return b')
tm = ip.magics_manager.registry['TerminalMagics']
tm.store_or_execute(s, name=None)
self.assertEqual(ip.user_ns['pasted_func'](54), 55)