127 lines
4.8 KiB
Python
127 lines
4.8 KiB
Python
# Copyright 2012 OpenStack Foundation
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import testtools
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import webob
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import glance.api.common
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from glance.common import exception
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class SimpleIterator(object):
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def __init__(self, file_object, chunk_size):
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self.file_object = file_object
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self.chunk_size = chunk_size
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def __iter__(self):
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def read_chunk():
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return self.fobj.read(self.chunk_size)
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chunk = read_chunk()
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while chunk:
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yield chunk
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chunk = read_chunk()
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else:
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return
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class TestSizeCheckedIter(testtools.TestCase):
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def _get_image_metadata(self):
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return {'id': 'e31cb99c-fe89-49fb-9cc5-f5104fffa636'}
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def _get_webob_response(self):
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request = webob.Request.blank('/')
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response = webob.Response()
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response.request = request
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return response
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def test_uniform_chunk_size(self):
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resp = self._get_webob_response()
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meta = self._get_image_metadata()
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checked_image = glance.api.common.size_checked_iter(
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resp, meta, 4, ['AB', 'CD'], None)
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self.assertEqual('AB', next(checked_image))
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self.assertEqual('CD', next(checked_image))
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self.assertRaises(StopIteration, next, checked_image)
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def test_small_last_chunk(self):
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resp = self._get_webob_response()
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meta = self._get_image_metadata()
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checked_image = glance.api.common.size_checked_iter(
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resp, meta, 3, ['AB', 'C'], None)
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self.assertEqual('AB', next(checked_image))
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self.assertEqual('C', next(checked_image))
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self.assertRaises(StopIteration, next, checked_image)
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def test_variable_chunk_size(self):
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resp = self._get_webob_response()
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meta = self._get_image_metadata()
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checked_image = glance.api.common.size_checked_iter(
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resp, meta, 6, ['AB', '', 'CDE', 'F'], None)
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self.assertEqual('AB', next(checked_image))
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self.assertEqual('', next(checked_image))
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self.assertEqual('CDE', next(checked_image))
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self.assertEqual('F', next(checked_image))
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self.assertRaises(StopIteration, next, checked_image)
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def test_too_many_chunks(self):
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"""An image should streamed regardless of expected_size"""
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resp = self._get_webob_response()
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meta = self._get_image_metadata()
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checked_image = glance.api.common.size_checked_iter(
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resp, meta, 4, ['AB', 'CD', 'EF'], None)
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self.assertEqual('AB', next(checked_image))
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self.assertEqual('CD', next(checked_image))
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self.assertEqual('EF', next(checked_image))
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self.assertRaises(exception.GlanceException, next, checked_image)
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def test_too_few_chunks(self):
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resp = self._get_webob_response()
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meta = self._get_image_metadata()
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checked_image = glance.api.common.size_checked_iter(resp, meta, 6,
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['AB', 'CD'],
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None)
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self.assertEqual('AB', next(checked_image))
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self.assertEqual('CD', next(checked_image))
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self.assertRaises(exception.GlanceException, next, checked_image)
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def test_too_much_data(self):
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resp = self._get_webob_response()
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meta = self._get_image_metadata()
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checked_image = glance.api.common.size_checked_iter(resp, meta, 3,
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['AB', 'CD'],
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None)
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self.assertEqual('AB', next(checked_image))
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self.assertEqual('CD', next(checked_image))
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self.assertRaises(exception.GlanceException, next, checked_image)
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def test_too_little_data(self):
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resp = self._get_webob_response()
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meta = self._get_image_metadata()
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checked_image = glance.api.common.size_checked_iter(resp, meta, 6,
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['AB', 'CD', 'E'],
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None)
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self.assertEqual('AB', next(checked_image))
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self.assertEqual('CD', next(checked_image))
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self.assertEqual('E', next(checked_image))
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self.assertRaises(exception.GlanceException, next, checked_image)
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