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d2e7b33815
load failure in relation to reloads. Also expose importlib.util.module_for_loader to handle all of the details of this along with making sure all current loaders behave nicely.
69 lines
2.1 KiB
Python
69 lines
2.1 KiB
Python
from importlib import util
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from . import util as test_util
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import imp
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import sys
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import types
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import unittest
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class ModuleForLoaderTests(unittest.TestCase):
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"""Tests for importlib.util.module_for_loader."""
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def return_module(self, name):
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fxn = util.module_for_loader(lambda self, module: module)
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return fxn(self, name)
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def raise_exception(self, name):
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def to_wrap(self, module):
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raise ImportError
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fxn = util.module_for_loader(to_wrap)
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try:
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fxn(self, name)
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except ImportError:
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pass
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def test_new_module(self):
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# Test that when no module exists in sys.modules a new module is
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# created.
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module_name = 'a.b.c'
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with test_util.uncache(module_name):
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module = self.return_module(module_name)
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self.assert_(module_name in sys.modules)
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self.assert_(isinstance(module, types.ModuleType))
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self.assertEqual(module.__name__, module_name)
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def test_reload(self):
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# Test that a module is reused if already in sys.modules.
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name = 'a.b.c'
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module = imp.new_module('a.b.c')
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with test_util.uncache(name):
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sys.modules[name] = module
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returned_module = self.return_module(name)
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self.assert_(sys.modules[name] is returned_module)
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def test_new_module_failure(self):
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# Test that a module is removed from sys.modules if added but an
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# exception is raised.
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name = 'a.b.c'
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with test_util.uncache(name):
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self.raise_exception(name)
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self.assert_(name not in sys.modules)
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def test_reload_failure(self):
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# Test that a failure on reload leaves the module in-place.
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name = 'a.b.c'
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module = imp.new_module(name)
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with test_util.uncache(name):
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sys.modules[name] = module
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self.raise_exception(name)
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self.assert_(sys.modules[name] is module)
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def test_main():
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from test import support
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support.run_unittest(ModuleForLoaderTests)
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if __name__ == '__main__':
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test_main()
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