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"""Tests for code execution (%run and related), which is particularly tricky.
Because of how %run manages namespaces, and the fact that we are trying here to
verify subtle object deletion and reference counting issues, the %run tests
will be kept in this separate file. This makes it easier to aggregate in one
place the tricks needed to handle it; most other magics are much easier to test
and we do so in a common test_magic file.
"""
from __future__ import absolute_import
#-----------------------------------------------------------------------------
# Imports
#-----------------------------------------------------------------------------
import os
import sys
import tempfile
import nose.tools as nt
from nose import SkipTest
from IPython.testing import decorators as dec
from IPython.testing import tools as tt
from IPython.utils import py3compat
#-----------------------------------------------------------------------------
# Test functions begin
#-----------------------------------------------------------------------------
def doctest_refbug():
"""Very nasty problem with references held by multiple runs of a script.
See: https://github.com/ipython/ipython/issues/141
In [1]: _ip.clear_main_mod_cache()
# random
In [2]: %run refbug
In [3]: call_f()
lowercased: hello
In [4]: %run refbug
In [5]: call_f()
lowercased: hello
lowercased: hello
"""
def doctest_run_builtins():
r"""Check that %run doesn't damage __builtins__.
In [1]: import tempfile
In [2]: bid1 = id(__builtins__)
In [3]: fname = tempfile.mkstemp('.py')[1]
In [3]: f = open(fname,'w')
In [4]: dummy= f.write('pass\n')
In [5]: f.flush()
In [6]: t1 = type(__builtins__)
In [7]: %run $fname
In [7]: f.close()
In [8]: bid2 = id(__builtins__)
In [9]: t2 = type(__builtins__)
In [10]: t1 == t2
Out[10]: True
In [10]: bid1 == bid2
Out[10]: True
In [12]: try:
....: os.unlink(fname)
....: except:
....: pass
....:
"""
@py3compat.doctest_refactor_print
def doctest_reset_del():
"""Test that resetting doesn't cause errors in __del__ methods.
In [2]: class A(object):
...: def __del__(self):
...: print str("Hi")
...:
In [3]: a = A()
In [4]: get_ipython().reset()
Hi
In [5]: 1+1
Out[5]: 2
"""
# For some tests, it will be handy to organize them in a class with a common
# setup that makes a temp file
class TestMagicRunPass(tt.TempFileMixin):
def setup(self):
"""Make a valid python temp file."""
self.mktmp('pass\n')
def run_tmpfile(self):
_ip = get_ipython()
# This fails on Windows if self.tmpfile.name has spaces or "~" in it.
# See below and ticket https://bugs.launchpad.net/bugs/366353
_ip.magic('run %s' % self.fname)
def run_tmpfile_p(self):
_ip = get_ipython()
# This fails on Windows if self.tmpfile.name has spaces or "~" in it.
# See below and ticket https://bugs.launchpad.net/bugs/366353
_ip.magic('run -p %s' % self.fname)
def test_builtins_id(self):
"""Check that %run doesn't damage __builtins__ """
_ip = get_ipython()
# Test that the id of __builtins__ is not modified by %run
bid1 = id(_ip.user_ns['__builtins__'])
self.run_tmpfile()
bid2 = id(_ip.user_ns['__builtins__'])
tt.assert_equals(bid1, bid2)
def test_builtins_type(self):
"""Check that the type of __builtins__ doesn't change with %run.
However, the above could pass if __builtins__ was already modified to
be a dict (it should be a module) by a previous use of %run. So we
also check explicitly that it really is a module:
"""
_ip = get_ipython()
self.run_tmpfile()
tt.assert_equals(type(_ip.user_ns['__builtins__']),type(sys))
def test_prompts(self):
"""Test that prompts correctly generate after %run"""
self.run_tmpfile()
_ip = get_ipython()
p2 = str(_ip.displayhook.prompt2).strip()
nt.assert_equals(p2[:3], '...')
def test_run_profile( self ):
"""Test that the option -p, which invokes the profiler, do not
crash by invoking execfile"""
_ip = get_ipython()
self.run_tmpfile_p()
class TestMagicRunSimple(tt.TempFileMixin):
def test_simpledef(self):
"""Test that simple class definitions work."""
src = ("class foo: pass\n"
"def f(): return foo()")
self.mktmp(src)
_ip.magic('run %s' % self.fname)
_ip.run_cell('t = isinstance(f(), foo)')
nt.assert_true(_ip.user_ns['t'])
def test_obj_del(self):
"""Test that object's __del__ methods are called on exit."""
if sys.platform == 'win32':
try:
import win32api
except ImportError:
raise SkipTest("Test requires pywin32")
src = ("class A(object):\n"
" def __del__(self):\n"
" print 'object A deleted'\n"
"a = A()\n")
self.mktmp(py3compat.doctest_refactor_print(src))
if dec.module_not_available('sqlite3'):
err = 'WARNING: IPython History requires SQLite, your history will not be saved\n'
else:
err = None
tt.ipexec_validate(self.fname, 'object A deleted', err)
@dec.skip_known_failure
def test_aggressive_namespace_cleanup(self):
"""Test that namespace cleanup is not too aggressive GH-238
Returning from another run magic deletes the namespace"""
# see ticket https://github.com/ipython/ipython/issues/238
class secondtmp(tt.TempFileMixin): pass
empty = secondtmp()
empty.mktmp('')
src = ("ip = get_ipython()\n"
"for i in range(5):\n"
" try:\n"
" ip.magic('run %s')\n"
" except NameError, e:\n"
" print i;break\n" % empty.fname)
self.mktmp(py3compat.doctest_refactor_print(src))
_ip.magic('run %s' % self.fname)
_ip.run_cell('ip == get_ipython()')
tt.assert_equals(_ip.user_ns['i'], 5)
@dec.skip_win32
def test_tclass(self):
mydir = os.path.dirname(__file__)
tc = os.path.join(mydir, 'tclass')
src = ("%%run '%s' C-first\n"
"%%run '%s' C-second\n"
"%%run '%s' C-third\n") % (tc, tc, tc)
self.mktmp(src, '.ipy')
out = """\
ARGV 1-: ['C-first']
ARGV 1-: ['C-second']
tclass.py: deleting object: C-first
ARGV 1-: ['C-third']
tclass.py: deleting object: C-second
tclass.py: deleting object: C-third
"""
if dec.module_not_available('sqlite3'):
err = 'WARNING: IPython History requires SQLite, your history will not be saved\n'
else:
err = None
tt.ipexec_validate(self.fname, out, err)
def test_run_i_after_reset(self):
"""Check that %run -i still works after %reset (gh-693)"""
src = "yy = zz\n"
self.mktmp(src)
_ip.run_cell("zz = 23")
_ip.magic('run -i %s' % self.fname)
tt.assert_equals(_ip.user_ns['yy'], 23)
_ip.magic('reset -f')
_ip.run_cell("zz = 23")
_ip.magic('run -i %s' % self.fname)
tt.assert_equals(_ip.user_ns['yy'], 23)
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