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# -*- coding: utf-8 -*-
# tag: ipython
"""Tests for the Cython magics extension."""
import os
import sys
try:
from IPython.testing.globalipapp import get_ipython
from IPython.utils import py3compat
except:
__test__ = False
try:
# disable IPython history thread to avoid having to clean it up
from IPython.core.history import HistoryManager
HistoryManager.enabled = False
except ImportError:
pass
from Cython.TestUtils import CythonTest
ip = get_ipython()
code = py3compat.str_to_unicode("""\
def f(x):
return 2*x
""")
cython3_code = py3compat.str_to_unicode("""\
def f(int x):
return 2 / x
def call(x):
return f(*(x,))
""")
if sys.platform == 'win32':
# not using IPython's decorators here because they depend on "nose"
try:
from unittest import skip as skip_win32
except ImportError:
# poor dev's silent @unittest.skip()
def skip_win32(f):
return lambda self: None
else:
def skip_win32(f):
return f
class TestIPythonMagic(CythonTest):
def setUp(self):
CythonTest.setUp(self)
ip.extension_manager.load_extension('cython')
def test_cython_inline(self):
ip.ex('a=10; b=20')
result = ip.run_cell_magic('cython_inline', '', 'return a+b')
self.assertEqual(result, 30)
@skip_win32
def test_cython_pyximport(self):
module_name = '_test_cython_pyximport'
ip.run_cell_magic('cython_pyximport', module_name, code)
ip.ex('g = f(10)')
self.assertEqual(ip.user_ns['g'], 20.0)
ip.run_cell_magic('cython_pyximport', module_name, code)
ip.ex('h = f(-10)')
self.assertEqual(ip.user_ns['h'], -20.0)
try:
os.remove(module_name + '.pyx')
except OSError:
pass
def test_cython(self):
ip.run_cell_magic('cython', '', code)
ip.ex('g = f(10)')
self.assertEqual(ip.user_ns['g'], 20.0)
def test_cython_name(self):
# The Cython module named 'mymodule' defines the function f.
ip.run_cell_magic('cython', '--name=mymodule', code)
# This module can now be imported in the interactive namespace.
ip.ex('import mymodule; g = mymodule.f(10)')
self.assertEqual(ip.user_ns['g'], 20.0)
def test_cython_language_level(self):
# The Cython cell defines the functions f() and call().
ip.run_cell_magic('cython', '', cython3_code)
ip.ex('g = f(10); h = call(10)')
if sys.version_info[0] < 3:
self.assertEqual(ip.user_ns['g'], 2 // 10)
self.assertEqual(ip.user_ns['h'], 2 // 10)
else:
self.assertEqual(ip.user_ns['g'], 2.0 / 10.0)
self.assertEqual(ip.user_ns['h'], 2.0 / 10.0)
def test_cython3(self):
# The Cython cell defines the functions f() and call().
ip.run_cell_magic('cython', '-3', cython3_code)
ip.ex('g = f(10); h = call(10)')
self.assertEqual(ip.user_ns['g'], 2.0 / 10.0)
self.assertEqual(ip.user_ns['h'], 2.0 / 10.0)
def test_cython2(self):
# The Cython cell defines the functions f() and call().
ip.run_cell_magic('cython', '-2', cython3_code)
ip.ex('g = f(10); h = call(10)')
self.assertEqual(ip.user_ns['g'], 2 // 10)
self.assertEqual(ip.user_ns['h'], 2 // 10)
@skip_win32
def test_extlibs(self):
code = py3compat.str_to_unicode("""
from libc.math cimport sin
x = sin(0.0)
""")
ip.user_ns['x'] = 1
ip.run_cell_magic('cython', '-l m', code)
self.assertEqual(ip.user_ns['x'], 0)
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