IPython/lib/tests/test_deepreload.py

# -*- coding: utf-8 -*-
"""Test suite for the deepreload module."""

#-----------------------------------------------------------------------------
# Imports
#-----------------------------------------------------------------------------

import os
import sys

import nose.tools as nt

from IPython.testing import decorators as dec
from IPython.utils.tempdir import TemporaryDirectory
from IPython.lib.deepreload import reload as dreload

#-----------------------------------------------------------------------------
# Test functions begin
#-----------------------------------------------------------------------------

@dec.skipif_not_numpy
def test_deepreload_numpy():
    "Test that NumPy can be deep reloaded."
    import numpy
    exclude = [
        # Standard exclusions:
        'sys', 'os.path', '__builtin__', '__main__',
        # Test-related exclusions:
        'unittest',
        ]
    dreload(numpy, exclude=exclude)

def test_deepreload():
    "Test that dreload does deep reloads and skips excluded modules."
    with TemporaryDirectory() as tmpdir:
        sys.path.insert(0, tmpdir)
        with open(os.path.join(tmpdir, 'A.py'), 'w') as f:
            f.write("class Object(object):\n    pass\n")
        with open(os.path.join(tmpdir, 'B.py'), 'w') as f:
            f.write("import A\n")
        import A
        import B

        # Test that A is not reloaded.
        obj = A.Object()
        dreload(B, exclude=['A'])
        nt.assert_true(isinstance(obj, A.Object))

        # Test that A is reloaded.
        obj = A.Object()
        dreload(B)
        nt.assert_false(isinstance(obj, A.Object))