mirror of https://github.com/python/cpython
106 lines
3.3 KiB
Python
106 lines
3.3 KiB
Python
import importlib
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from importlib import machinery
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from .. import abc
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from .. import util
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from . import util as builtin_util
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import sys
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import types
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import unittest
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class LoaderTests(abc.LoaderTests):
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"""Test load_module() for built-in modules."""
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verification = {'__name__': 'errno', '__package__': '',
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'__loader__': machinery.BuiltinImporter}
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def verify(self, module):
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"""Verify that the module matches against what it should have."""
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self.assertTrue(isinstance(module, types.ModuleType))
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for attr, value in self.verification.items():
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self.assertEqual(getattr(module, attr), value)
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self.assertTrue(module.__name__ in sys.modules)
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load_module = staticmethod(lambda name:
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machinery.BuiltinImporter.load_module(name))
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def test_module(self):
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# Common case.
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with util.uncache(builtin_util.NAME):
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module = self.load_module(builtin_util.NAME)
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self.verify(module)
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def test_package(self):
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# Built-in modules cannot be a package.
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pass
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def test_lacking_parent(self):
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# Built-in modules cannot be a package.
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pass
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def test_state_after_failure(self):
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# Not way to force an imoprt failure.
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pass
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def test_module_reuse(self):
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# Test that the same module is used in a reload.
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with util.uncache(builtin_util.NAME):
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module1 = self.load_module(builtin_util.NAME)
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module2 = self.load_module(builtin_util.NAME)
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self.assertTrue(module1 is module2)
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def test_unloadable(self):
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name = 'dssdsdfff'
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assert name not in sys.builtin_module_names
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with self.assertRaises(ImportError) as cm:
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self.load_module(name)
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self.assertEqual(cm.exception.name, name)
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def test_already_imported(self):
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# Using the name of a module already imported but not a built-in should
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# still fail.
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assert hasattr(importlib, '__file__') # Not a built-in.
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with self.assertRaises(ImportError) as cm:
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self.load_module('importlib')
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self.assertEqual(cm.exception.name, 'importlib')
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class InspectLoaderTests(unittest.TestCase):
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"""Tests for InspectLoader methods for BuiltinImporter."""
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def test_get_code(self):
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# There is no code object.
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result = machinery.BuiltinImporter.get_code(builtin_util.NAME)
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self.assertTrue(result is None)
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def test_get_source(self):
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# There is no source.
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result = machinery.BuiltinImporter.get_source(builtin_util.NAME)
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self.assertTrue(result is None)
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def test_is_package(self):
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# Cannot be a package.
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result = machinery.BuiltinImporter.is_package(builtin_util.NAME)
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self.assertTrue(not result)
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def test_not_builtin(self):
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# Modules not built-in should raise ImportError.
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for meth_name in ('get_code', 'get_source', 'is_package'):
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method = getattr(machinery.BuiltinImporter, meth_name)
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with self.assertRaises(ImportError) as cm:
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method(builtin_util.BAD_NAME)
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self.assertRaises(builtin_util.BAD_NAME)
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def test_main():
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from test.support import run_unittest
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run_unittest(LoaderTests, InspectLoaderTests)
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if __name__ == '__main__':
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test_main()
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