remove another py2 only test
remove another py2 only test

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test_inputsplitter.py
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/ IPython / core / tests / test_inputsplitter.py
# -*- coding: utf-8 -*-
"""Tests for the inputsplitter module."""
from __future__ import print_function
# Copyright (c) IPython Development Team.
# Distributed under the terms of the Modified BSD License.
import unittest
import sys
import nose.tools as nt
from IPython.core import inputsplitter as isp
from IPython.core.inputtransformer import InputTransformer
from IPython.core.tests.test_inputtransformer import syntax, syntax_ml
from IPython.testing import tools as tt
from IPython.utils import py3compat
from IPython.utils.py3compat import string_types, input
#-----------------------------------------------------------------------------
# Semi-complete examples (also used as tests)
#-----------------------------------------------------------------------------
# Note: at the bottom, there's a slightly more complete version of this that
# can be useful during development of code here.
def mini_interactive_loop(input_func):
"""Minimal example of the logic of an interactive interpreter loop.
This serves as an example, and it is used by the test system with a fake
raw_input that simulates interactive input."""
from IPython.core.inputsplitter import InputSplitter
isp = InputSplitter()
# In practice, this input loop would be wrapped in an outside loop to read
# input indefinitely, until some exit/quit command was issued. Here we
# only illustrate the basic inner loop.
while isp.push_accepts_more():
indent = ' '*isp.indent_spaces
prompt = '>>> ' + indent
line = indent + input_func(prompt)
isp.push(line)
# Here we just return input so we can use it in a test suite, but a real
# interpreter would instead send it for execution somewhere.
src = isp.source_reset()
#print 'Input source was:\n', src # dbg
return src
#-----------------------------------------------------------------------------
# Test utilities, just for local use
#-----------------------------------------------------------------------------
def assemble(block):
"""Assemble a block into multi-line sub-blocks."""
return ['\n'.join(sub_block)+'\n' for sub_block in block]
def pseudo_input(lines):
"""Return a function that acts like raw_input but feeds the input list."""
ilines = iter(lines)
def raw_in(prompt):
try:
return next(ilines)
except StopIteration:
return ''
return raw_in
#-----------------------------------------------------------------------------
# Tests
#-----------------------------------------------------------------------------
def test_spaces():
tests = [('', 0),
(' ', 1),
('\n', 0),
(' \n', 1),
('x', 0),
(' x', 1),
(' x',2),
(' x',4),
# Note: tabs are counted as a single whitespace!
('\tx', 1),
('\t x', 2),
]
tt.check_pairs(isp.num_ini_spaces, tests)
def test_remove_comments():
tests = [('text', 'text'),
('text # comment', 'text '),
('text # comment\n', 'text \n'),
('text # comment \n', 'text \n'),
('line # c \nline\n','line \nline\n'),
('line # c \nline#c2 \nline\nline #c\n\n',
'line \nline\nline\nline \n\n'),
]
tt.check_pairs(isp.remove_comments, tests)
def test_get_input_encoding():
encoding = isp.get_input_encoding()
nt.assert_true(isinstance(encoding, string_types))
# simple-minded check that at least encoding a simple string works with the
# encoding we got.
nt.assert_equal(u'test'.encode(encoding), b'test')
class NoInputEncodingTestCase(unittest.TestCase):
def setUp(self):
self.old_stdin = sys.stdin
class X: pass
fake_stdin = X()
sys.stdin = fake_stdin
def test(self):
# Verify that if sys.stdin has no 'encoding' attribute we do the right
# thing
enc = isp.get_input_encoding()
self.assertEqual(enc, 'ascii')
def tearDown(self):
sys.stdin = self.old_stdin
class InputSplitterTestCase(unittest.TestCase):
def setUp(self):
self.isp = isp.InputSplitter()
def test_reset(self):
isp = self.isp
isp.push('x=1')
isp.reset()
self.assertEqual(isp._buffer, [])
self.assertEqual(isp.indent_spaces, 0)
self.assertEqual(isp.source, '')
self.assertEqual(isp.code, None)
self.assertEqual(isp._is_complete, False)
def test_source(self):
self.isp._store('1')
self.isp._store('2')
self.assertEqual(self.isp.source, '1\n2\n')
self.assertTrue(len(self.isp._buffer)>0)
self.assertEqual(self.isp.source_reset(), '1\n2\n')
self.assertEqual(self.isp._buffer, [])
self.assertEqual(self.isp.source, '')
def test_indent(self):
isp = self.isp # shorthand
isp.push('x=1')
self.assertEqual(isp.indent_spaces, 0)
isp.push('if 1:\n x=1')
self.assertEqual(isp.indent_spaces, 4)
isp.push('y=2\n')
self.assertEqual(isp.indent_spaces, 0)
def test_indent2(self):
isp = self.isp
isp.push('if 1:')
self.assertEqual(isp.indent_spaces, 4)
isp.push(' x=1')
self.assertEqual(isp.indent_spaces, 4)
# Blank lines shouldn't change the indent level
isp.push(' '*2)
self.assertEqual(isp.indent_spaces, 4)
def test_indent3(self):
isp = self.isp
# When a multiline statement contains parens or multiline strings, we
# shouldn't get confused.
isp.push("if 1:")
isp.push(" x = (1+\n 2)")
self.assertEqual(isp.indent_spaces, 4)
def test_indent4(self):
isp = self.isp
# whitespace after ':' should not screw up indent level
isp.push('if 1: \n x=1')
self.assertEqual(isp.indent_spaces, 4)
isp.push('y=2\n')
self.assertEqual(isp.indent_spaces, 0)
isp.push('if 1:\t\n x=1')
self.assertEqual(isp.indent_spaces, 4)
isp.push('y=2\n')
self.assertEqual(isp.indent_spaces, 0)
def test_dedent_pass(self):
isp = self.isp # shorthand
# should NOT cause dedent
isp.push('if 1:\n passes = 5')
self.assertEqual(isp.indent_spaces, 4)
isp.push('if 1:\n pass')
self.assertEqual(isp.indent_spaces, 0)
isp.push('if 1:\n pass ')
self.assertEqual(isp.indent_spaces, 0)
def test_dedent_break(self):
isp = self.isp # shorthand
# should NOT cause dedent
isp.push('while 1:\n breaks = 5')
self.assertEqual(isp.indent_spaces, 4)
isp.push('while 1:\n break')
self.assertEqual(isp.indent_spaces, 0)
isp.push('while 1:\n break ')
self.assertEqual(isp.indent_spaces, 0)
def test_dedent_continue(self):
isp = self.isp # shorthand
# should NOT cause dedent
isp.push('while 1:\n continues = 5')
self.assertEqual(isp.indent_spaces, 4)
isp.push('while 1:\n continue')
self.assertEqual(isp.indent_spaces, 0)
isp.push('while 1:\n continue ')
self.assertEqual(isp.indent_spaces, 0)
def test_dedent_raise(self):
isp = self.isp # shorthand
# should NOT cause dedent
isp.push('if 1:\n raised = 4')
self.assertEqual(isp.indent_spaces, 4)
isp.push('if 1:\n raise TypeError()')
self.assertEqual(isp.indent_spaces, 0)
isp.push('if 1:\n raise')
self.assertEqual(isp.indent_spaces, 0)
isp.push('if 1:\n raise ')
self.assertEqual(isp.indent_spaces, 0)
def test_dedent_return(self):
isp = self.isp # shorthand
# should NOT cause dedent
isp.push('if 1:\n returning = 4')
self.assertEqual(isp.indent_spaces, 4)
isp.push('if 1:\n return 5 + 493')
self.assertEqual(isp.indent_spaces, 0)
isp.push('if 1:\n return')
self.assertEqual(isp.indent_spaces, 0)
isp.push('if 1:\n return ')
self.assertEqual(isp.indent_spaces, 0)
isp.push('if 1:\n return(0)')
self.assertEqual(isp.indent_spaces, 0)
def test_push(self):
isp = self.isp
self.assertTrue(isp.push('x=1'))
def test_push2(self):
isp = self.isp
self.assertFalse(isp.push('if 1:'))
for line in [' x=1', '# a comment', ' y=2']:
print(line)
self.assertTrue(isp.push(line))
def test_push3(self):
isp = self.isp
isp.push('if True:')
isp.push(' a = 1')
self.assertFalse(isp.push('b = [1,'))
def test_push_accepts_more(self):
isp = self.isp
isp.push('x=1')
self.assertFalse(isp.push_accepts_more())
def test_push_accepts_more2(self):
isp = self.isp
isp.push('if 1:')
self.assertTrue(isp.push_accepts_more())
isp.push(' x=1')
self.assertTrue(isp.push_accepts_more())
isp.push('')
self.assertFalse(isp.push_accepts_more())
def test_push_accepts_more3(self):
isp = self.isp
isp.push("x = (2+\n3)")
self.assertFalse(isp.push_accepts_more())
def test_push_accepts_more4(self):
isp = self.isp
# When a multiline statement contains parens or multiline strings, we
# shouldn't get confused.
# FIXME: we should be able to better handle de-dents in statements like
# multiline strings and multiline expressions (continued with \ or
# parens). Right now we aren't handling the indentation tracking quite
# correctly with this, though in practice it may not be too much of a
# problem. We'll need to see.
isp.push("if 1:")
isp.push(" x = (2+")
isp.push(" 3)")
self.assertTrue(isp.push_accepts_more())
isp.push(" y = 3")
self.assertTrue(isp.push_accepts_more())
isp.push('')
self.assertFalse(isp.push_accepts_more())
def test_push_accepts_more5(self):
isp = self.isp
isp.push('try:')
isp.push(' a = 5')
isp.push('except:')
isp.push(' raise')
# We want to be able to add an else: block at this point, so it should
# wait for a blank line.
self.assertTrue(isp.push_accepts_more())
def test_continuation(self):
isp = self.isp
isp.push("import os, \\")
self.assertTrue(isp.push_accepts_more())
isp.push("sys")
self.assertFalse(isp.push_accepts_more())
def test_syntax_error(self):
isp = self.isp
# Syntax errors immediately produce a 'ready' block, so the invalid
# Python can be sent to the kernel for evaluation with possible ipython
# special-syntax conversion.
isp.push('run foo')
self.assertFalse(isp.push_accepts_more())
def test_unicode(self):
self.isp.push(u"Pérez")
self.isp.push(u'\xc3\xa9')
self.isp.push(u"u'\xc3\xa9'")
def test_line_continuation(self):
""" Test issue #2108."""
isp = self.isp
# A blank line after a line continuation should not accept more
isp.push("1 \\\n\n")
self.assertFalse(isp.push_accepts_more())
# Whitespace after a \ is a SyntaxError. The only way to test that
# here is to test that push doesn't accept more (as with
# test_syntax_error() above).
isp.push(r"1 \ ")
self.assertFalse(isp.push_accepts_more())
# Even if the line is continuable (c.f. the regular Python
# interpreter)
isp.push(r"(1 \ ")
self.assertFalse(isp.push_accepts_more())
def test_check_complete(self):
isp = self.isp
self.assertEqual(isp.check_complete("a = 1"), ('complete', None))
self.assertEqual(isp.check_complete("for a in range(5):"), ('incomplete', 4))
self.assertEqual(isp.check_complete("raise = 2"), ('invalid', None))
self.assertEqual(isp.check_complete("a = [1,\n2,"), ('incomplete', 0))
self.assertEqual(isp.check_complete("def a():\n x=1\n global x"), ('invalid', None))
class InteractiveLoopTestCase(unittest.TestCase):
"""Tests for an interactive loop like a python shell.
"""
def check_ns(self, lines, ns):
"""Validate that the given input lines produce the resulting namespace.
Note: the input lines are given exactly as they would be typed in an
auto-indenting environment, as mini_interactive_loop above already does
auto-indenting and prepends spaces to the input.
"""
src = mini_interactive_loop(pseudo_input(lines))
test_ns = {}
exec(src, test_ns)
# We can't check that the provided ns is identical to the test_ns,
# because Python fills test_ns with extra keys (copyright, etc). But
# we can check that the given dict is *contained* in test_ns
for k,v in ns.items():
self.assertEqual(test_ns[k], v)
def test_simple(self):
self.check_ns(['x=1'], dict(x=1))
def test_simple2(self):
self.check_ns(['if 1:', 'x=2'], dict(x=2))
def test_xy(self):
self.check_ns(['x=1; y=2'], dict(x=1, y=2))
def test_abc(self):
self.check_ns(['if 1:','a=1','b=2','c=3'], dict(a=1, b=2, c=3))
def test_multi(self):
self.check_ns(['x =(1+','1+','2)'], dict(x=4))
class IPythonInputTestCase(InputSplitterTestCase):
"""By just creating a new class whose .isp is a different instance, we
re-run the same test battery on the new input splitter.
In addition, this runs the tests over the syntax and syntax_ml dicts that
were tested by individual functions, as part of the OO interface.
It also makes some checks on the raw buffer storage.
"""
def setUp(self):
self.isp = isp.IPythonInputSplitter()
def test_syntax(self):
"""Call all single-line syntax tests from the main object"""
isp = self.isp
for example in syntax.values():
for raw, out_t in example:
if raw.startswith(' '):
continue
isp.push(raw+'\n')
out_raw = isp.source_raw
out = isp.source_reset()
self.assertEqual(out.rstrip(), out_t,
tt.pair_fail_msg.format("inputsplitter",raw, out_t, out))
self.assertEqual(out_raw.rstrip(), raw.rstrip())
def test_syntax_multiline(self):
isp = self.isp
for example in syntax_ml.values():
for line_pairs in example:
out_t_parts = []
raw_parts = []
for lraw, out_t_part in line_pairs:
if out_t_part is not None:
out_t_parts.append(out_t_part)
if lraw is not None:
isp.push(lraw)
raw_parts.append(lraw)
out_raw = isp.source_raw
out = isp.source_reset()
out_t = '\n'.join(out_t_parts).rstrip()
raw = '\n'.join(raw_parts).rstrip()
self.assertEqual(out.rstrip(), out_t)
self.assertEqual(out_raw.rstrip(), raw)
def test_syntax_multiline_cell(self):
isp = self.isp
for example in syntax_ml.values():
out_t_parts = []
for line_pairs in example:
raw = '\n'.join(r for r, _ in line_pairs if r is not None)
out_t = '\n'.join(t for _,t in line_pairs if t is not None)
out = isp.transform_cell(raw)
# Match ignoring trailing whitespace
self.assertEqual(out.rstrip(), out_t.rstrip())
def test_cellmagic_preempt(self):
isp = self.isp
for raw, name, line, cell in [
("%%cellm a\nIn[1]:", u'cellm', u'a', u'In[1]:'),
("%%cellm \nline\n>>> hi", u'cellm', u'', u'line\n>>> hi'),
(">>> %%cellm \nline\n>>> hi", u'cellm', u'', u'line\nhi'),
("%%cellm \n>>> hi", u'cellm', u'', u'>>> hi'),
("%%cellm \nline1\nline2", u'cellm', u'', u'line1\nline2'),
("%%cellm \nline1\\\\\nline2", u'cellm', u'', u'line1\\\\\nline2'),
]:
expected = "get_ipython().run_cell_magic(%r, %r, %r)" % (
name, line, cell
)
out = isp.transform_cell(raw)
self.assertEqual(out.rstrip(), expected.rstrip())
def test_multiline_passthrough(self):
isp = self.isp
class CommentTransformer(InputTransformer):
def __init__(self):
self._lines = []
def push(self, line):
self._lines.append(line + '#')
def reset(self):
text = '\n'.join(self._lines)
self._lines = []
return text
isp.physical_line_transforms.insert(0, CommentTransformer())
for raw, expected in [
("a=5", "a=5#"),
("%ls foo", "get_ipython().magic(%r)" % u'ls foo#'),
("!ls foo\n%ls bar", "get_ipython().system(%r)\nget_ipython().magic(%r)" % (
u'ls foo#', u'ls bar#'
)),
("1\n2\n3\n%ls foo\n4\n5", "1#\n2#\n3#\nget_ipython().magic(%r)\n4#\n5#" % u'ls foo#'),
]:
out = isp.transform_cell(raw)
self.assertEqual(out.rstrip(), expected.rstrip())
#-----------------------------------------------------------------------------
# Main - use as a script, mostly for developer experiments
#-----------------------------------------------------------------------------
if __name__ == '__main__':
# A simple demo for interactive experimentation. This code will not get
# picked up by any test suite.
from IPython.core.inputsplitter import IPythonInputSplitter
# configure here the syntax to use, prompt and whether to autoindent
#isp, start_prompt = InputSplitter(), '>>> '
isp, start_prompt = IPythonInputSplitter(), 'In> '
autoindent = True
#autoindent = False
try:
while True:
prompt = start_prompt
while isp.push_accepts_more():
indent = ' '*isp.indent_spaces
if autoindent:
line = indent + input(prompt+indent)
else:
line = input(prompt)
isp.push(line)
prompt = '... '
# Here we just return input so we can use it in a test suite, but a
# real interpreter would instead send it for execution somewhere.
#src = isp.source; raise EOFError # dbg
raw = isp.source_raw
src = isp.source_reset()
print('Input source was:\n', src)
print('Raw source was:\n', raw)
except EOFError:
print('Bye')
# Tests for cell magics support
def test_last_blank():
nt.assert_false(isp.last_blank(''))
nt.assert_false(isp.last_blank('abc'))
nt.assert_false(isp.last_blank('abc\n'))
nt.assert_false(isp.last_blank('abc\na'))
nt.assert_true(isp.last_blank('\n'))
nt.assert_true(isp.last_blank('\n '))
nt.assert_true(isp.last_blank('abc\n '))
nt.assert_true(isp.last_blank('abc\n\n'))
nt.assert_true(isp.last_blank('abc\nd\n\n'))
nt.assert_true(isp.last_blank('abc\nd\ne\n\n'))
nt.assert_true(isp.last_blank('abc \n \n \n\n'))
def test_last_two_blanks():
nt.assert_false(isp.last_two_blanks(''))
nt.assert_false(isp.last_two_blanks('abc'))
nt.assert_false(isp.last_two_blanks('abc\n'))
nt.assert_false(isp.last_two_blanks('abc\n\na'))
nt.assert_false(isp.last_two_blanks('abc\n \n'))
nt.assert_false(isp.last_two_blanks('abc\n\n'))
nt.assert_true(isp.last_two_blanks('\n\n'))
nt.assert_true(isp.last_two_blanks('\n\n '))
nt.assert_true(isp.last_two_blanks('\n \n'))
nt.assert_true(isp.last_two_blanks('abc\n\n '))
nt.assert_true(isp.last_two_blanks('abc\n\n\n'))
nt.assert_true(isp.last_two_blanks('abc\n\n \n'))
nt.assert_true(isp.last_two_blanks('abc\n\n \n '))
nt.assert_true(isp.last_two_blanks('abc\n\n \n \n'))
nt.assert_true(isp.last_two_blanks('abc\nd\n\n\n'))
nt.assert_true(isp.last_two_blanks('abc\nd\ne\nf\n\n\n'))
class CellMagicsCommon(object):
def test_whole_cell(self):
src = "%%cellm line\nbody\n"
out = self.sp.transform_cell(src)
ref = u"get_ipython().run_cell_magic({u}'cellm', {u}'line', {u}'body')\n"
nt.assert_equal(out, py3compat.u_format(ref))
def test_cellmagic_help(self):
self.sp.push('%%cellm?')
nt.assert_false(self.sp.push_accepts_more())
def tearDown(self):
self.sp.reset()
class CellModeCellMagics(CellMagicsCommon, unittest.TestCase):
sp = isp.IPythonInputSplitter(line_input_checker=False)
def test_incremental(self):
sp = self.sp
sp.push('%%cellm firstline\n')
nt.assert_true(sp.push_accepts_more()) #1
sp.push('line2\n')
nt.assert_true(sp.push_accepts_more()) #2
sp.push('\n')
# This should accept a blank line and carry on until the cell is reset
nt.assert_true(sp.push_accepts_more()) #3
def test_no_strip_coding(self):
src = '\n'.join([
'%%writefile foo.py',
'# coding: utf-8',
'print(u"üñîçø∂é")',
])
out = self.sp.transform_cell(src)
nt.assert_in('# coding: utf-8', out)
class LineModeCellMagics(CellMagicsCommon, unittest.TestCase):
sp = isp.IPythonInputSplitter(line_input_checker=True)
def test_incremental(self):
sp = self.sp
sp.push('%%cellm line2\n')
nt.assert_true(sp.push_accepts_more()) #1
sp.push('\n')
# In this case, a blank line should end the cell magic
nt.assert_false(sp.push_accepts_more()) #2