test.py 文件源码

def test_opendir(self):
        # Make a simple directory structure
        self.fs.makedir('foo')
        self.fs.setbytes('foo/bar', b'barbar')
        self.fs.setbytes('foo/egg', b'eggegg')

        # Open a sub directory
        with self.fs.opendir('foo') as foo_fs:
            repr(foo_fs)
            text_type(foo_fs)
            six.assertCountEqual(self, foo_fs.listdir('/'), ['bar', 'egg'])
            self.assertTrue(foo_fs.isfile('bar'))
            self.assertTrue(foo_fs.isfile('egg'))
            self.assertEqual(foo_fs.getbytes('bar'), b'barbar')
            self.assertEqual(foo_fs.getbytes('egg'), b'eggegg')

        self.assertFalse(self.fs.isclosed())

        # Attempt to open a non-existent directory
        with self.assertRaises(errors.ResourceNotFound):
            self.fs.opendir('egg')

        # Check error when doing opendir on a non dir
        with self.assertRaises(errors.DirectoryExpected):
            self.fs.opendir('foo/egg')

        # These should work, and will essentially return a 'clone' of sorts
        self.fs.opendir('')
        self.fs.opendir('/')

        # Check ClosingSubFS closes 'parent'
        with self.fs.opendir('foo', factory=ClosingSubFS) as foo_fs:
            six.assertCountEqual(self, foo_fs.listdir('/'), ['bar', 'egg'])
            self.assertTrue(foo_fs.isfile('bar'))
            self.assertTrue(foo_fs.isfile('egg'))
            self.assertEqual(foo_fs.getbytes('bar'), b'barbar')
            self.assertEqual(foo_fs.getbytes('egg'), b'eggegg')

        self.assertTrue(self.fs.isclosed())