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| 1 # |
| 2 # Copyright 2015 Google Inc. |
| 3 # |
| 4 # Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 # you may not use this file except in compliance with the License. |
| 6 # You may obtain a copy of the License at |
| 7 # |
| 8 # http://www.apache.org/licenses/LICENSE-2.0 |
| 9 # |
| 10 # Unless required by applicable law or agreed to in writing, software |
| 11 # distributed under the License is distributed on an "AS IS" BASIS, |
| 12 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 # See the License for the specific language governing permissions and |
| 14 # limitations under the License. |
| 15 |
| 16 """Tests for stream_slice.""" |
| 17 |
| 18 import string |
| 19 |
| 20 import six |
| 21 import unittest2 |
| 22 |
| 23 from apitools.base.py import exceptions |
| 24 from apitools.base.py import stream_slice |
| 25 |
| 26 |
| 27 class StreamSliceTest(unittest2.TestCase): |
| 28 |
| 29 def setUp(self): |
| 30 self.stream = six.StringIO(string.ascii_letters) |
| 31 self.value = self.stream.getvalue() |
| 32 self.stream.seek(0) |
| 33 |
| 34 def testSimpleSlice(self): |
| 35 ss = stream_slice.StreamSlice(self.stream, 10) |
| 36 self.assertEqual('', ss.read(0)) |
| 37 self.assertEqual(self.value[0:3], ss.read(3)) |
| 38 self.assertIn('7/10', str(ss)) |
| 39 self.assertEqual(self.value[3:10], ss.read()) |
| 40 self.assertEqual('', ss.read()) |
| 41 self.assertEqual('', ss.read(10)) |
| 42 self.assertEqual(10, self.stream.tell()) |
| 43 |
| 44 def testEmptySlice(self): |
| 45 ss = stream_slice.StreamSlice(self.stream, 0) |
| 46 self.assertEqual('', ss.read(5)) |
| 47 self.assertEqual('', ss.read()) |
| 48 self.assertEqual(0, self.stream.tell()) |
| 49 |
| 50 def testOffsetStream(self): |
| 51 self.stream.seek(26) |
| 52 ss = stream_slice.StreamSlice(self.stream, 26) |
| 53 self.assertEqual(self.value[26:36], ss.read(10)) |
| 54 self.assertEqual(self.value[36:], ss.read()) |
| 55 self.assertEqual('', ss.read()) |
| 56 |
| 57 def testTooShortStream(self): |
| 58 ss = stream_slice.StreamSlice(self.stream, 1000) |
| 59 self.assertEqual(self.value, ss.read()) |
| 60 self.assertEqual('', ss.read(0)) |
| 61 with self.assertRaises(exceptions.StreamExhausted) as e: |
| 62 ss.read() |
| 63 with self.assertRaises(exceptions.StreamExhausted) as e: |
| 64 ss.read(10) |
| 65 self.assertIn('exhausted after %d' % len(self.value), str(e.exception)) |
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