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"""Tests for input manipulation machinery."""
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#-----------------------------------------------------------------------------
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# Imports
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#-----------------------------------------------------------------------------
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import nose.tools as nt
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from IPython.core.prefilter import AutocallChecker
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from IPython.testing.globalipapp import get_ipython
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#-----------------------------------------------------------------------------
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# Tests
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#-----------------------------------------------------------------------------
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ip = get_ipython()
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def test_prefilter():
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"""Test user input conversions"""
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# pairs of (raw, expected correct) input
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pairs = [ ('2+2','2+2'),
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]
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for raw, correct in pairs:
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nt.assert_equal(ip.prefilter(raw), correct)
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def test_prefilter_shadowed():
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def dummy_magic(line): pass
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prev_automagic_state = ip.automagic
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ip.automagic = True
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ip.autocall = 0
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try:
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# These should not be transformed - they are shadowed by other names
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for name in ['if', 'zip', 'get_ipython']: # keyword, builtin, global
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ip.register_magic_function(dummy_magic, magic_name=name)
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res = ip.prefilter(name+' foo')
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nt.assert_equal(res, name+' foo')
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del ip.magics_manager.magics['line'][name]
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# These should be transformed
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for name in ['fi', 'piz', 'nohtypi_teg']:
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ip.register_magic_function(dummy_magic, magic_name=name)
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res = ip.prefilter(name+' foo')
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nt.assert_not_equal(res, name+' foo')
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del ip.magics_manager.magics['line'][name]
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finally:
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ip.automagic = prev_automagic_state
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def test_autocall_binops():
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"""See https://github.com/ipython/ipython/issues/81"""
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ip.magic('autocall 2')
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f = lambda x: x
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ip.user_ns['f'] = f
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try:
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nt.assert_equal(ip.prefilter('f 1'),'f(1)')
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for t in ['f +1', 'f -1']:
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nt.assert_equal(ip.prefilter(t), t)
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# Run tests again with a more permissive exclude_regexp, which will
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# allow transformation of binary operations ('f -1' -> 'f(-1)').
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pm = ip.prefilter_manager
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ac = AutocallChecker(shell=pm.shell, prefilter_manager=pm,
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config=pm.config)
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try:
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ac.priority = 1
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ac.exclude_regexp = r'^[,&^\|\*/]|^is |^not |^in |^and |^or '
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pm.sort_checkers()
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nt.assert_equal(ip.prefilter('f -1'), 'f(-1)')
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nt.assert_equal(ip.prefilter('f +1'), 'f(+1)')
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finally:
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pm.unregister_checker(ac)
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finally:
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ip.magic('autocall 0')
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del ip.user_ns['f']
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def test_issue_114():
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"""Check that multiline string literals don't expand as magic
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see http://github.com/ipython/ipython/issues/114"""
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template = '"""\n%s\n"""'
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# Store the current value of multi_line_specials and turn it off before
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# running test, since it could be true (case in which the test doesn't make
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# sense, as multiline string literals *will* expand as magic in that case).
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msp = ip.prefilter_manager.multi_line_specials
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ip.prefilter_manager.multi_line_specials = False
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try:
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for mgk in ip.magics_manager.lsmagic()['line']:
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raw = template % mgk
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nt.assert_equal(ip.prefilter(raw), raw)
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finally:
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ip.prefilter_manager.multi_line_specials = msp
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def test_prefilter_attribute_errors():
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"""Capture exceptions thrown by user objects on attribute access.
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See http://github.com/ipython/ipython/issues/988."""
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class X(object):
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def __getattr__(self, k):
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raise ValueError('broken object')
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def __call__(self, x):
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return x
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# Create a callable broken object
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ip.user_ns['x'] = X()
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ip.magic('autocall 2')
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try:
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# Even if x throws an attribute error when looking at its rewrite
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# attribute, we should not crash. So the test here is simply making
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# the prefilter call and not having an exception.
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ip.prefilter('x 1')
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finally:
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del ip.user_ns['x']
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ip.magic('autocall 0')
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