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"""Tests for code execution (%run and related), which is particularly tricky.
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Because of how %run manages namespaces, and the fact that we are trying here to
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verify subtle object deletion and reference counting issues, the %run tests
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will be kept in this separate file. This makes it easier to aggregate in one
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place the tricks needed to handle it; most other magics are much easier to test
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and we do so in a common test_magic file.
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"""
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from __future__ import absolute_import
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#-----------------------------------------------------------------------------
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# Imports
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#-----------------------------------------------------------------------------
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import os
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import sys
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import tempfile
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import nose.tools as nt
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from nose import SkipTest
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from IPython.testing import decorators as dec
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from IPython.testing import tools as tt
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from IPython.utils import py3compat
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#-----------------------------------------------------------------------------
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# Test functions begin
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#-----------------------------------------------------------------------------
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def doctest_refbug():
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"""Very nasty problem with references held by multiple runs of a script.
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See: https://github.com/ipython/ipython/issues/141
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In [1]: _ip.clear_main_mod_cache()
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# random
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In [2]: %run refbug
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In [3]: call_f()
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lowercased: hello
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In [4]: %run refbug
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In [5]: call_f()
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lowercased: hello
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lowercased: hello
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"""
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def doctest_run_builtins():
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r"""Check that %run doesn't damage __builtins__.
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In [1]: import tempfile
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In [2]: bid1 = id(__builtins__)
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In [3]: fname = tempfile.mkstemp('.py')[1]
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In [3]: f = open(fname,'w')
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In [4]: dummy= f.write('pass\n')
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In [5]: f.flush()
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In [6]: t1 = type(__builtins__)
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In [7]: %run $fname
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In [7]: f.close()
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In [8]: bid2 = id(__builtins__)
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In [9]: t2 = type(__builtins__)
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In [10]: t1 == t2
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Out[10]: True
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In [10]: bid1 == bid2
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Out[10]: True
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In [12]: try:
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....: os.unlink(fname)
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....: except:
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....: pass
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....:
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"""
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@py3compat.doctest_refactor_print
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def doctest_reset_del():
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"""Test that resetting doesn't cause errors in __del__ methods.
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In [2]: class A(object):
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...: def __del__(self):
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...: print str("Hi")
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...:
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In [3]: a = A()
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In [4]: get_ipython().reset()
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Hi
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In [5]: 1+1
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Out[5]: 2
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"""
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# For some tests, it will be handy to organize them in a class with a common
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# setup that makes a temp file
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class TestMagicRunPass(tt.TempFileMixin):
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def setup(self):
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"""Make a valid python temp file."""
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self.mktmp('pass\n')
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def run_tmpfile(self):
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_ip = get_ipython()
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# This fails on Windows if self.tmpfile.name has spaces or "~" in it.
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# See below and ticket https://bugs.launchpad.net/bugs/366353
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_ip.magic('run %s' % self.fname)
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def test_builtins_id(self):
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"""Check that %run doesn't damage __builtins__ """
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_ip = get_ipython()
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# Test that the id of __builtins__ is not modified by %run
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bid1 = id(_ip.user_ns['__builtins__'])
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self.run_tmpfile()
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bid2 = id(_ip.user_ns['__builtins__'])
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tt.assert_equals(bid1, bid2)
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def test_builtins_type(self):
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"""Check that the type of __builtins__ doesn't change with %run.
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However, the above could pass if __builtins__ was already modified to
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be a dict (it should be a module) by a previous use of %run. So we
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also check explicitly that it really is a module:
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"""
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_ip = get_ipython()
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self.run_tmpfile()
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tt.assert_equals(type(_ip.user_ns['__builtins__']),type(sys))
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def test_prompts(self):
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"""Test that prompts correctly generate after %run"""
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self.run_tmpfile()
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_ip = get_ipython()
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p2 = str(_ip.displayhook.prompt2).strip()
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nt.assert_equals(p2[:3], '...')
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class TestMagicRunSimple(tt.TempFileMixin):
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def test_simpledef(self):
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"""Test that simple class definitions work."""
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src = ("class foo: pass\n"
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"def f(): return foo()")
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self.mktmp(src)
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_ip.magic('run %s' % self.fname)
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_ip.run_cell('t = isinstance(f(), foo)')
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nt.assert_true(_ip.user_ns['t'])
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def test_obj_del(self):
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"""Test that object's __del__ methods are called on exit."""
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if sys.platform == 'win32':
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try:
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import win32api
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except ImportError:
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raise SkipTest("Test requires pywin32")
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src = ("class A(object):\n"
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" def __del__(self):\n"
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" print 'object A deleted'\n"
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"a = A()\n")
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self.mktmp(py3compat.doctest_refactor_print(src))
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if dec.module_not_available('sqlite3'):
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err = 'WARNING: IPython History requires SQLite, your history will not be saved\n'
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else:
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err = None
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tt.ipexec_validate(self.fname, 'object A deleted', err)
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@dec.skip_known_failure
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def test_aggressive_namespace_cleanup(self):
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"""Test that namespace cleanup is not too aggressive GH-238
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Returning from another run magic deletes the namespace"""
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# see ticket https://github.com/ipython/ipython/issues/238
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class secondtmp(tt.TempFileMixin): pass
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empty = secondtmp()
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empty.mktmp('')
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src = ("ip = get_ipython()\n"
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"for i in range(5):\n"
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" try:\n"
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" ip.magic('run %s')\n"
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" except NameError, e:\n"
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" print i;break\n" % empty.fname)
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self.mktmp(py3compat.doctest_refactor_print(src))
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_ip.magic('run %s' % self.fname)
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_ip.run_cell('ip == get_ipython()')
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tt.assert_equals(_ip.user_ns['i'], 5)
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@dec.skip_win32
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def test_tclass(self):
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mydir = os.path.dirname(__file__)
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tc = os.path.join(mydir, 'tclass')
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src = ("%%run '%s' C-first\n"
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"%%run '%s' C-second\n"
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"%%run '%s' C-third\n") % (tc, tc, tc)
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self.mktmp(src, '.ipy')
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out = """\
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ARGV 1-: ['C-first']
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ARGV 1-: ['C-second']
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tclass.py: deleting object: C-first
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ARGV 1-: ['C-third']
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tclass.py: deleting object: C-second
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tclass.py: deleting object: C-third
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"""
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if dec.module_not_available('sqlite3'):
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err = 'WARNING: IPython History requires SQLite, your history will not be saved\n'
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else:
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err = None
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tt.ipexec_validate(self.fname, out, err)
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