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# Copyright 2010 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
import re
import portage
from portage import os
from portage.tests import TestCase
from _emerge.TaskScheduler import TaskScheduler
from _emerge.PipeReader import PipeReader
from _emerge.SpawnProcess import SpawnProcess
class LazyImportPortageBaselineTestCase(TestCase):
_module_re = re.compile(r'^(portage|repoman|_emerge)\.')
_baseline_imports = frozenset([
'portage.const', 'portage.env', 'portage.localization',
'portage.proxy', 'portage.proxy.lazyimport',
'portage.proxy.objectproxy', 'portage._ensure_encodings',
])
_baseline_import_cmd = [portage._python_interpreter, '-c',
'import portage, sys ; ' + \
'sys.stdout.write(" ".join(k for k in sys.modules ' + \
'if sys.modules[k] is not None))']
def testLazyImportPortageBaseline(self):
"""
Check what modules are imported by a baseline module import.
"""
task_scheduler = TaskScheduler()
master_fd, slave_fd = os.pipe()
master_file = os.fdopen(master_fd, 'rb')
slave_file = os.fdopen(slave_fd, 'wb')
producer = SpawnProcess(
args=self._baseline_import_cmd,
env=os.environ, fd_pipes={1:slave_fd},
scheduler=task_scheduler.sched_iface)
producer.start()
slave_file.close()
consumer = PipeReader(
input_files={"producer" : master_file},
scheduler=task_scheduler.sched_iface)
task_scheduler.add(consumer)
task_scheduler.run()
output = consumer.getvalue().decode('ascii', 'replace').split()
unexpected_modules = " ".join(sorted(x for x in output \
if self._module_re.match(x) is not None and \
x not in self._baseline_imports))
self.assertEqual("", unexpected_modules)
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