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"""Tests for input handlers.
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"""
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#-----------------------------------------------------------------------------
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# Module imports
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#-----------------------------------------------------------------------------
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# third party
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import nose.tools as nt
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# our own packages
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from IPython.core import autocall
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from IPython.testing import decorators as dec
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from IPython.testing.globalipapp import get_ipython
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#-----------------------------------------------------------------------------
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# Globals
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#-----------------------------------------------------------------------------
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# Get the public instance of IPython
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ip = get_ipython()
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failures = []
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num_tests = 0
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#-----------------------------------------------------------------------------
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# Test functions
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#-----------------------------------------------------------------------------
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class CallableIndexable(object):
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def __getitem__(self, idx): return True
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def __call__(self, *args, **kws): return True
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class Autocallable(autocall.IPyAutocall):
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def __call__(self):
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return "called"
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def run(tests):
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"""Loop through a list of (pre, post) inputs, where pre is the string
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handed to ipython, and post is how that string looks after it's been
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transformed (i.e. ipython's notion of _i)"""
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for pre, post in tests:
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global num_tests
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num_tests += 1
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actual = ip.prefilter_manager.prefilter_lines(pre)
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if actual != None:
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actual = actual.rstrip('\n')
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if actual != post:
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failures.append('Expected %r to become %r, found %r' % (
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pre, post, actual))
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def test_handlers():
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# alias expansion
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# We're using 'true' as our syscall of choice because it doesn't
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# write anything to stdout.
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# Turn off actual execution of aliases, because it's noisy
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old_system_cmd = ip.system
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ip.system = lambda cmd: None
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ip.alias_manager.alias_table['an_alias'] = (0, 'true')
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# These are useful for checking a particular recursive alias issue
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ip.alias_manager.alias_table['top'] = (0, 'd:/cygwin/top')
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ip.alias_manager.alias_table['d'] = (0, 'true')
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run([("an_alias", 'get_ipython().system(u"true ")'), # alias
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# Below: recursive aliases should expand whitespace-surrounded
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# chars, *not* initial chars which happen to be aliases:
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("top", 'get_ipython().system(u"d:/cygwin/top ")'),
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])
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ip.system = old_system_cmd
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call_idx = CallableIndexable()
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ip.user_ns['call_idx'] = call_idx
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# For many of the below, we're also checking that leading whitespace
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# turns off the esc char, which it should unless there is a continuation
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# line.
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run([('"no change"', '"no change"'), # normal
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("!true", 'get_ipython().system(u"true")'), # shell_escapes
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("!! true", 'get_ipython().magic(u"sx true")'), # shell_escapes + magic
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("!!true", 'get_ipython().magic(u"sx true")'), # shell_escapes + magic
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("%lsmagic", 'get_ipython().magic(u"lsmagic ")'), # magic
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("lsmagic", 'get_ipython().magic(u"lsmagic ")'), # magic
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#("a = b # PYTHON-MODE", '_i'), # emacs -- avoids _in cache
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# post-esc-char whitespace goes inside
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("! true", 'get_ipython().system(u" true")'),
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# handle_help
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# These are weak tests -- just looking at what the help handlers
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# logs, which is not how it really does its work. But it still
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# lets us check the key paths through the handler.
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("x=1 # what?", "x=1 # what?"), # no help if valid python
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])
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# multi_line_specials
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ip.prefilter_manager.multi_line_specials = False
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# W/ multi_line_specials off, leading ws kills esc chars/autoexpansion
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run([
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('if 1:\n !true', 'if 1:\n !true'),
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('if 1:\n lsmagic', 'if 1:\n lsmagic'),
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('if 1:\n an_alias', 'if 1:\n an_alias'),
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])
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ip.prefilter_manager.multi_line_specials = True
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# initial indents must be preserved.
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run([
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('if 1:\n !true', 'if 1:\n get_ipython().system(u"true")'),
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('if 2:\n lsmagic', 'if 2:\n get_ipython().magic(u"lsmagic ")'),
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('if 1:\n an_alias', 'if 1:\n get_ipython().system(u"true ")'),
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# Weird one
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('if 1:\n !!true', 'if 1:\n get_ipython().magic(u"sx true")'),
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# Even with m_l_s on, autocall is off even with special chars
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('if 1:\n /fun 1 2', 'if 1:\n /fun 1 2'),
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('if 1:\n ;fun 1 2', 'if 1:\n ;fun 1 2'),
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('if 1:\n ,fun 1 2', 'if 1:\n ,fun 1 2'),
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('if 1:\n ?fun 1 2', 'if 1:\n ?fun 1 2'),
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# What about !!
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])
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# Objects which are instances of IPyAutocall are *always* autocalled
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autocallable = Autocallable()
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ip.user_ns['autocallable'] = autocallable
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# auto
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ip.magic('autocall 0')
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# Only explicit escapes or instances of IPyAutocallable should get
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# expanded
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run([
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('len "abc"', 'len "abc"'),
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('autocallable', 'autocallable()'),
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(",list 1 2 3", 'list("1", "2", "3")'),
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(";list 1 2 3", 'list("1 2 3")'),
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("/len range(1,4)", 'len(range(1,4))'),
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])
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ip.magic('autocall 1')
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run([
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(",list 1 2 3", 'list("1", "2", "3")'),
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(";list 1 2 3", 'list("1 2 3")'),
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("/len range(1,4)", 'len(range(1,4))'),
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('len "abc"', 'len("abc")'),
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('len "abc";', 'len("abc");'), # ; is special -- moves out of parens
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# Autocall is turned off if first arg is [] and the object
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# is both callable and indexable. Like so:
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('len [1,2]', 'len([1,2])'), # len doesn't support __getitem__...
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('call_idx [1]', 'call_idx [1]'), # call_idx *does*..
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('call_idx 1', 'call_idx(1)'),
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('len', 'len '), # only at 2 does it auto-call on single args
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])
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ip.magic('autocall 2')
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run([
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(",list 1 2 3", 'list("1", "2", "3")'),
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(";list 1 2 3", 'list("1 2 3")'),
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("/len range(1,4)", 'len(range(1,4))'),
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('len "abc"', 'len("abc")'),
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('len "abc";', 'len("abc");'),
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('len [1,2]', 'len([1,2])'),
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('call_idx [1]', 'call_idx [1]'),
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('call_idx 1', 'call_idx(1)'),
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# This is what's different:
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('len', 'len()'), # only at 2 does it auto-call on single args
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])
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ip.magic('autocall 1')
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nt.assert_equals(failures, [])
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