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import difflib
import glob
import gzip
import os
import sys
import tempfile
import unittest
import Cython.Build.Dependencies
import Cython.Utils
from Cython.TestUtils import CythonTest
class TestCyCache(CythonTest):
def setUp(self):
CythonTest.setUp(self)
self.temp_dir = tempfile.mkdtemp(
prefix='cycache-test',
dir='TEST_TMP' if os.path.isdir('TEST_TMP') else None)
self.src_dir = tempfile.mkdtemp(prefix='src', dir=self.temp_dir)
self.cache_dir = tempfile.mkdtemp(prefix='cache', dir=self.temp_dir)
def cache_files(self, file_glob):
return glob.glob(os.path.join(self.cache_dir, file_glob))
def fresh_cythonize(self, *args, **kwargs):
Cython.Utils.clear_function_caches()
Cython.Build.Dependencies._dep_tree = None # discard method caches
Cython.Build.Dependencies.cythonize(*args, **kwargs)
def test_cycache_switch(self):
content1 = 'value = 1\n'
content2 = 'value = 2\n'
a_pyx = os.path.join(self.src_dir, 'a.pyx')
a_c = a_pyx[:-4] + '.c'
with open(a_pyx, 'w') as f:
f.write(content1)
self.fresh_cythonize(a_pyx, cache=self.cache_dir)
self.fresh_cythonize(a_pyx, cache=self.cache_dir)
self.assertEqual(1, len(self.cache_files('a.c*')))
with open(a_c) as f:
a_contents1 = f.read()
os.unlink(a_c)
with open(a_pyx, 'w') as f:
f.write(content2)
self.fresh_cythonize(a_pyx, cache=self.cache_dir)
with open(a_c) as f:
a_contents2 = f.read()
os.unlink(a_c)
self.assertNotEqual(a_contents1, a_contents2, 'C file not changed!')
self.assertEqual(2, len(self.cache_files('a.c*')))
with open(a_pyx, 'w') as f:
f.write(content1)
self.fresh_cythonize(a_pyx, cache=self.cache_dir)
self.assertEqual(2, len(self.cache_files('a.c*')))
with open(a_c) as f:
a_contents = f.read()
self.assertEqual(
a_contents, a_contents1,
msg='\n'.join(list(difflib.unified_diff(
a_contents.split('\n'), a_contents1.split('\n')))[:10]))
def test_cycache_uses_cache(self):
a_pyx = os.path.join(self.src_dir, 'a.pyx')
a_c = a_pyx[:-4] + '.c'
with open(a_pyx, 'w') as f:
f.write('pass')
self.fresh_cythonize(a_pyx, cache=self.cache_dir)
a_cache = os.path.join(self.cache_dir, os.listdir(self.cache_dir)[0])
with gzip.GzipFile(a_cache, 'wb') as gzipfile:
gzipfile.write('fake stuff'.encode('ascii'))
os.unlink(a_c)
self.fresh_cythonize(a_pyx, cache=self.cache_dir)
with open(a_c) as f:
a_contents = f.read()
self.assertEqual(a_contents, 'fake stuff',
'Unexpected contents: %s...' % a_contents[:100])
def test_multi_file_output(self):
a_pyx = os.path.join(self.src_dir, 'a.pyx')
a_c = a_pyx[:-4] + '.c'
a_h = a_pyx[:-4] + '.h'
a_api_h = a_pyx[:-4] + '_api.h'
with open(a_pyx, 'w') as f:
f.write('cdef public api int foo(int x): return x\n')
self.fresh_cythonize(a_pyx, cache=self.cache_dir)
expected = [a_c, a_h, a_api_h]
for output in expected:
self.assertTrue(os.path.exists(output), output)
os.unlink(output)
self.fresh_cythonize(a_pyx, cache=self.cache_dir)
for output in expected:
self.assertTrue(os.path.exists(output), output)
def test_options_invalidation(self):
hash_pyx = os.path.join(self.src_dir, 'options.pyx')
hash_c = hash_pyx[:-len('.pyx')] + '.c'
with open(hash_pyx, 'w') as f:
f.write('pass')
self.fresh_cythonize(hash_pyx, cache=self.cache_dir, cplus=False)
self.assertEqual(1, len(self.cache_files('options.c*')))
os.unlink(hash_c)
self.fresh_cythonize(hash_pyx, cache=self.cache_dir, cplus=True)
self.assertEqual(2, len(self.cache_files('options.c*')))
os.unlink(hash_c)
self.fresh_cythonize(hash_pyx, cache=self.cache_dir, cplus=False, show_version=False)
self.assertEqual(2, len(self.cache_files('options.c*')))
os.unlink(hash_c)
self.fresh_cythonize(hash_pyx, cache=self.cache_dir, cplus=False, show_version=True)
self.assertEqual(2, len(self.cache_files('options.c*')))
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