| from .. import abc |
| from . import util as source_util |
| |
| from importlib import machinery |
| import errno |
| import imp |
| import os |
| import py_compile |
| from test.support import make_legacy_pyc |
| import unittest |
| import warnings |
| |
| |
| class FinderTests(abc.FinderTests): |
| |
| """For a top-level module, it should just be found directly in the |
| directory being searched. This is true for a directory with source |
| [top-level source], bytecode [top-level bc], or both [top-level both]. |
| There is also the possibility that it is a package [top-level package], in |
| which case there will be a directory with the module name and an |
| __init__.py file. If there is a directory without an __init__.py an |
| ImportWarning is returned [empty dir]. |
| |
| For sub-modules and sub-packages, the same happens as above but only use |
| the tail end of the name [sub module] [sub package] [sub empty]. |
| |
| When there is a conflict between a package and module having the same name |
| in the same directory, the package wins out [package over module]. This is |
| so that imports of modules within the package can occur rather than trigger |
| an import error. |
| |
| When there is a package and module with the same name, always pick the |
| package over the module [package over module]. This is so that imports from |
| the package have the possibility of succeeding. |
| |
| """ |
| |
| def get_finder(self, root): |
| loader_details = [(machinery.SourceFileLoader, |
| machinery.SOURCE_SUFFIXES), |
| (machinery.SourcelessFileLoader, |
| machinery.BYTECODE_SUFFIXES)] |
| return machinery.FileFinder(root, *loader_details) |
| |
| def import_(self, root, module): |
| return self.get_finder(root).find_module(module) |
| |
| def run_test(self, test, create=None, *, compile_=None, unlink=None): |
| """Test the finding of 'test' with the creation of modules listed in |
| 'create'. |
| |
| Any names listed in 'compile_' are byte-compiled. Modules |
| listed in 'unlink' have their source files deleted. |
| |
| """ |
| if create is None: |
| create = {test} |
| with source_util.create_modules(*create) as mapping: |
| if compile_: |
| for name in compile_: |
| py_compile.compile(mapping[name]) |
| if unlink: |
| for name in unlink: |
| os.unlink(mapping[name]) |
| try: |
| make_legacy_pyc(mapping[name]) |
| except OSError as error: |
| # Some tests do not set compile_=True so the source |
| # module will not get compiled and there will be no |
| # PEP 3147 pyc file to rename. |
| if error.errno != errno.ENOENT: |
| raise |
| loader = self.import_(mapping['.root'], test) |
| self.assertTrue(hasattr(loader, 'load_module')) |
| return loader |
| |
| def test_module(self): |
| # [top-level source] |
| self.run_test('top_level') |
| # [top-level bc] |
| self.run_test('top_level', compile_={'top_level'}, |
| unlink={'top_level'}) |
| # [top-level both] |
| self.run_test('top_level', compile_={'top_level'}) |
| |
| # [top-level package] |
| def test_package(self): |
| # Source. |
| self.run_test('pkg', {'pkg.__init__'}) |
| # Bytecode. |
| self.run_test('pkg', {'pkg.__init__'}, compile_={'pkg.__init__'}, |
| unlink={'pkg.__init__'}) |
| # Both. |
| self.run_test('pkg', {'pkg.__init__'}, compile_={'pkg.__init__'}) |
| |
| # [sub module] |
| def test_module_in_package(self): |
| with source_util.create_modules('pkg.__init__', 'pkg.sub') as mapping: |
| pkg_dir = os.path.dirname(mapping['pkg.__init__']) |
| loader = self.import_(pkg_dir, 'pkg.sub') |
| self.assertTrue(hasattr(loader, 'load_module')) |
| |
| # [sub package] |
| def test_package_in_package(self): |
| context = source_util.create_modules('pkg.__init__', 'pkg.sub.__init__') |
| with context as mapping: |
| pkg_dir = os.path.dirname(mapping['pkg.__init__']) |
| loader = self.import_(pkg_dir, 'pkg.sub') |
| self.assertTrue(hasattr(loader, 'load_module')) |
| |
| # [package over modules] |
| def test_package_over_module(self): |
| name = '_temp' |
| loader = self.run_test(name, {'{0}.__init__'.format(name), name}) |
| self.assertIn('__init__', loader.get_filename(name)) |
| |
| def test_failure(self): |
| with source_util.create_modules('blah') as mapping: |
| nothing = self.import_(mapping['.root'], 'sdfsadsadf') |
| self.assertIsNone(nothing) |
| |
| def test_empty_string_for_dir(self): |
| # The empty string from sys.path means to search in the cwd. |
| finder = machinery.FileFinder('', (machinery.SourceFileLoader, |
| machinery.SOURCE_SUFFIXES)) |
| with open('mod.py', 'w') as file: |
| file.write("# test file for importlib") |
| try: |
| loader = finder.find_module('mod') |
| self.assertTrue(hasattr(loader, 'load_module')) |
| finally: |
| os.unlink('mod.py') |
| |
| def test_invalidate_caches(self): |
| # invalidate_caches() should reset the mtime. |
| finder = machinery.FileFinder('', (machinery.SourceFileLoader, |
| machinery.SOURCE_SUFFIXES)) |
| finder._path_mtime = 42 |
| finder.invalidate_caches() |
| self.assertEqual(finder._path_mtime, -1) |
| |
| # Regression test for http://bugs.python.org/issue14846 |
| def test_dir_removal_handling(self): |
| mod = 'mod' |
| with source_util.create_modules(mod) as mapping: |
| finder = self.get_finder(mapping['.root']) |
| self.assertIsNotNone(finder.find_module(mod)) |
| self.assertIsNone(finder.find_module(mod)) |
| |
| def test_main(): |
| from test.support import run_unittest |
| run_unittest(FinderTests) |
| |
| |
| if __name__ == '__main__': |
| test_main() |