Christian Heimes | 7b6fc8e | 2007-11-08 02:28:11 +0000 | [diff] [blame] | 1 | """Unit tests for the memoryview |
| 2 | |
Stefan Krah | aaf8e2e | 2012-08-19 12:50:24 +0200 | [diff] [blame] | 3 | Some tests are in test_bytes. Many tests that require _testbuffer.ndarray |
| 4 | are in test_buffer. |
Christian Heimes | 7b6fc8e | 2007-11-08 02:28:11 +0000 | [diff] [blame] | 5 | """ |
| 6 | |
| 7 | import unittest |
Benjamin Peterson | ee8712c | 2008-05-20 21:35:26 +0000 | [diff] [blame] | 8 | import test.support |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 9 | import sys |
Antoine Pitrou | c6b09eb | 2008-09-01 15:10:14 +0000 | [diff] [blame] | 10 | import gc |
| 11 | import weakref |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 12 | import array |
Antoine Pitrou | ad62b03 | 2011-01-18 18:57:52 +0000 | [diff] [blame] | 13 | import io |
Christian Heimes | 7b6fc8e | 2007-11-08 02:28:11 +0000 | [diff] [blame] | 14 | |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 15 | |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 16 | class AbstractMemoryTests: |
| 17 | source_bytes = b"abcdef" |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 18 | |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 19 | @property |
| 20 | def _source(self): |
| 21 | return self.source_bytes |
| 22 | |
| 23 | @property |
| 24 | def _types(self): |
| 25 | return filter(None, [self.ro_type, self.rw_type]) |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 26 | |
| 27 | def check_getitem_with_type(self, tp): |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 28 | b = tp(self._source) |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 29 | oldrefcount = sys.getrefcount(b) |
| 30 | m = self._view(b) |
Stefan Krah | 9a2d99e | 2012-02-25 12:24:21 +0100 | [diff] [blame] | 31 | self.assertEqual(m[0], ord(b"a")) |
| 32 | self.assertIsInstance(m[0], int) |
| 33 | self.assertEqual(m[5], ord(b"f")) |
| 34 | self.assertEqual(m[-1], ord(b"f")) |
| 35 | self.assertEqual(m[-6], ord(b"a")) |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 36 | # Bounds checking |
| 37 | self.assertRaises(IndexError, lambda: m[6]) |
| 38 | self.assertRaises(IndexError, lambda: m[-7]) |
| 39 | self.assertRaises(IndexError, lambda: m[sys.maxsize]) |
| 40 | self.assertRaises(IndexError, lambda: m[-sys.maxsize]) |
| 41 | # Type checking |
| 42 | self.assertRaises(TypeError, lambda: m[None]) |
| 43 | self.assertRaises(TypeError, lambda: m[0.0]) |
| 44 | self.assertRaises(TypeError, lambda: m["a"]) |
| 45 | m = None |
Ezio Melotti | b3aedd4 | 2010-11-20 19:04:17 +0000 | [diff] [blame] | 46 | self.assertEqual(sys.getrefcount(b), oldrefcount) |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 47 | |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 48 | def test_getitem(self): |
| 49 | for tp in self._types: |
| 50 | self.check_getitem_with_type(tp) |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 51 | |
Raymond Hettinger | 159eac9 | 2009-06-23 20:38:54 +0000 | [diff] [blame] | 52 | def test_iter(self): |
| 53 | for tp in self._types: |
| 54 | b = tp(self._source) |
| 55 | m = self._view(b) |
| 56 | self.assertEqual(list(m), [m[i] for i in range(len(m))]) |
| 57 | |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 58 | def test_setitem_readonly(self): |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 59 | if not self.ro_type: |
Zachary Ware | 9fe6d86 | 2013-12-08 00:20:35 -0600 | [diff] [blame] | 60 | self.skipTest("no read-only type to test") |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 61 | b = self.ro_type(self._source) |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 62 | oldrefcount = sys.getrefcount(b) |
| 63 | m = self._view(b) |
| 64 | def setitem(value): |
| 65 | m[0] = value |
| 66 | self.assertRaises(TypeError, setitem, b"a") |
| 67 | self.assertRaises(TypeError, setitem, 65) |
| 68 | self.assertRaises(TypeError, setitem, memoryview(b"a")) |
| 69 | m = None |
Ezio Melotti | b3aedd4 | 2010-11-20 19:04:17 +0000 | [diff] [blame] | 70 | self.assertEqual(sys.getrefcount(b), oldrefcount) |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 71 | |
| 72 | def test_setitem_writable(self): |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 73 | if not self.rw_type: |
Zachary Ware | 9fe6d86 | 2013-12-08 00:20:35 -0600 | [diff] [blame] | 74 | self.skipTest("no writable type to test") |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 75 | tp = self.rw_type |
| 76 | b = self.rw_type(self._source) |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 77 | oldrefcount = sys.getrefcount(b) |
| 78 | m = self._view(b) |
Stefan Krah | 9a2d99e | 2012-02-25 12:24:21 +0100 | [diff] [blame] | 79 | m[0] = ord(b'1') |
| 80 | self._check_contents(tp, b, b"1bcdef") |
| 81 | m[0:1] = tp(b"0") |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 82 | self._check_contents(tp, b, b"0bcdef") |
| 83 | m[1:3] = tp(b"12") |
| 84 | self._check_contents(tp, b, b"012def") |
| 85 | m[1:1] = tp(b"") |
| 86 | self._check_contents(tp, b, b"012def") |
| 87 | m[:] = tp(b"abcdef") |
| 88 | self._check_contents(tp, b, b"abcdef") |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 89 | |
| 90 | # Overlapping copies of a view into itself |
| 91 | m[0:3] = m[2:5] |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 92 | self._check_contents(tp, b, b"cdedef") |
| 93 | m[:] = tp(b"abcdef") |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 94 | m[2:5] = m[0:3] |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 95 | self._check_contents(tp, b, b"ababcf") |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 96 | |
| 97 | def setitem(key, value): |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 98 | m[key] = tp(value) |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 99 | # Bounds checking |
| 100 | self.assertRaises(IndexError, setitem, 6, b"a") |
| 101 | self.assertRaises(IndexError, setitem, -7, b"a") |
| 102 | self.assertRaises(IndexError, setitem, sys.maxsize, b"a") |
| 103 | self.assertRaises(IndexError, setitem, -sys.maxsize, b"a") |
| 104 | # Wrong index/slice types |
| 105 | self.assertRaises(TypeError, setitem, 0.0, b"a") |
| 106 | self.assertRaises(TypeError, setitem, (0,), b"a") |
Stefan Krah | 9a2d99e | 2012-02-25 12:24:21 +0100 | [diff] [blame] | 107 | self.assertRaises(TypeError, setitem, (slice(0,1,1), 0), b"a") |
| 108 | self.assertRaises(TypeError, setitem, (0, slice(0,1,1)), b"a") |
| 109 | self.assertRaises(TypeError, setitem, (0,), b"a") |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 110 | self.assertRaises(TypeError, setitem, "a", b"a") |
Stefan Krah | 9a2d99e | 2012-02-25 12:24:21 +0100 | [diff] [blame] | 111 | # Not implemented: multidimensional slices |
| 112 | slices = (slice(0,1,1), slice(0,1,2)) |
| 113 | self.assertRaises(NotImplementedError, setitem, slices, b"a") |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 114 | # Trying to resize the memory object |
Stefan Krah | 9a2d99e | 2012-02-25 12:24:21 +0100 | [diff] [blame] | 115 | exc = ValueError if m.format == 'c' else TypeError |
| 116 | self.assertRaises(exc, setitem, 0, b"") |
| 117 | self.assertRaises(exc, setitem, 0, b"ab") |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 118 | self.assertRaises(ValueError, setitem, slice(1,1), b"a") |
| 119 | self.assertRaises(ValueError, setitem, slice(0,2), b"a") |
| 120 | |
| 121 | m = None |
Ezio Melotti | b3aedd4 | 2010-11-20 19:04:17 +0000 | [diff] [blame] | 122 | self.assertEqual(sys.getrefcount(b), oldrefcount) |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 123 | |
Antoine Pitrou | e0793ba | 2010-09-01 21:14:16 +0000 | [diff] [blame] | 124 | def test_delitem(self): |
| 125 | for tp in self._types: |
| 126 | b = tp(self._source) |
| 127 | m = self._view(b) |
| 128 | with self.assertRaises(TypeError): |
| 129 | del m[1] |
| 130 | with self.assertRaises(TypeError): |
| 131 | del m[1:4] |
| 132 | |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 133 | def test_tobytes(self): |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 134 | for tp in self._types: |
| 135 | m = self._view(tp(self._source)) |
| 136 | b = m.tobytes() |
| 137 | # This calls self.getitem_type() on each separate byte of b"abcdef" |
| 138 | expected = b"".join( |
| 139 | self.getitem_type(bytes([c])) for c in b"abcdef") |
Ezio Melotti | b3aedd4 | 2010-11-20 19:04:17 +0000 | [diff] [blame] | 140 | self.assertEqual(b, expected) |
Ezio Melotti | e961593 | 2010-01-24 19:26:24 +0000 | [diff] [blame] | 141 | self.assertIsInstance(b, bytes) |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 142 | |
| 143 | def test_tolist(self): |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 144 | for tp in self._types: |
| 145 | m = self._view(tp(self._source)) |
| 146 | l = m.tolist() |
Ezio Melotti | b3aedd4 | 2010-11-20 19:04:17 +0000 | [diff] [blame] | 147 | self.assertEqual(l, list(b"abcdef")) |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 148 | |
| 149 | def test_compare(self): |
| 150 | # memoryviews can compare for equality with other objects |
| 151 | # having the buffer interface. |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 152 | for tp in self._types: |
| 153 | m = self._view(tp(self._source)) |
| 154 | for tp_comp in self._types: |
| 155 | self.assertTrue(m == tp_comp(b"abcdef")) |
| 156 | self.assertFalse(m != tp_comp(b"abcdef")) |
| 157 | self.assertFalse(m == tp_comp(b"abcde")) |
| 158 | self.assertTrue(m != tp_comp(b"abcde")) |
| 159 | self.assertFalse(m == tp_comp(b"abcde1")) |
| 160 | self.assertTrue(m != tp_comp(b"abcde1")) |
| 161 | self.assertTrue(m == m) |
| 162 | self.assertTrue(m == m[:]) |
| 163 | self.assertTrue(m[0:6] == m[:]) |
| 164 | self.assertFalse(m[0:5] == m) |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 165 | |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 166 | # Comparison with objects which don't support the buffer API |
| 167 | self.assertFalse(m == "abcdef") |
| 168 | self.assertTrue(m != "abcdef") |
| 169 | self.assertFalse("abcdef" == m) |
| 170 | self.assertTrue("abcdef" != m) |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 171 | |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 172 | # Unordered comparisons |
| 173 | for c in (m, b"abcdef"): |
| 174 | self.assertRaises(TypeError, lambda: m < c) |
| 175 | self.assertRaises(TypeError, lambda: c <= m) |
| 176 | self.assertRaises(TypeError, lambda: m >= c) |
| 177 | self.assertRaises(TypeError, lambda: c > m) |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 178 | |
| 179 | def check_attributes_with_type(self, tp): |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 180 | m = self._view(tp(self._source)) |
Ezio Melotti | b3aedd4 | 2010-11-20 19:04:17 +0000 | [diff] [blame] | 181 | self.assertEqual(m.format, self.format) |
| 182 | self.assertEqual(m.itemsize, self.itemsize) |
| 183 | self.assertEqual(m.ndim, 1) |
| 184 | self.assertEqual(m.shape, (6,)) |
| 185 | self.assertEqual(len(m), 6) |
| 186 | self.assertEqual(m.strides, (self.itemsize,)) |
Stefan Krah | 9a2d99e | 2012-02-25 12:24:21 +0100 | [diff] [blame] | 187 | self.assertEqual(m.suboffsets, ()) |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 188 | return m |
| 189 | |
| 190 | def test_attributes_readonly(self): |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 191 | if not self.ro_type: |
Zachary Ware | 9fe6d86 | 2013-12-08 00:20:35 -0600 | [diff] [blame] | 192 | self.skipTest("no read-only type to test") |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 193 | m = self.check_attributes_with_type(self.ro_type) |
Ezio Melotti | b3aedd4 | 2010-11-20 19:04:17 +0000 | [diff] [blame] | 194 | self.assertEqual(m.readonly, True) |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 195 | |
| 196 | def test_attributes_writable(self): |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 197 | if not self.rw_type: |
Zachary Ware | 9fe6d86 | 2013-12-08 00:20:35 -0600 | [diff] [blame] | 198 | self.skipTest("no writable type to test") |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 199 | m = self.check_attributes_with_type(self.rw_type) |
Ezio Melotti | b3aedd4 | 2010-11-20 19:04:17 +0000 | [diff] [blame] | 200 | self.assertEqual(m.readonly, False) |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 201 | |
Antoine Pitrou | c6b09eb | 2008-09-01 15:10:14 +0000 | [diff] [blame] | 202 | def test_getbuffer(self): |
| 203 | # Test PyObject_GetBuffer() on a memoryview object. |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 204 | for tp in self._types: |
| 205 | b = tp(self._source) |
| 206 | oldrefcount = sys.getrefcount(b) |
| 207 | m = self._view(b) |
| 208 | oldviewrefcount = sys.getrefcount(m) |
| 209 | s = str(m, "utf-8") |
| 210 | self._check_contents(tp, b, s.encode("utf-8")) |
Ezio Melotti | b3aedd4 | 2010-11-20 19:04:17 +0000 | [diff] [blame] | 211 | self.assertEqual(sys.getrefcount(m), oldviewrefcount) |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 212 | m = None |
Ezio Melotti | b3aedd4 | 2010-11-20 19:04:17 +0000 | [diff] [blame] | 213 | self.assertEqual(sys.getrefcount(b), oldrefcount) |
Antoine Pitrou | c6b09eb | 2008-09-01 15:10:14 +0000 | [diff] [blame] | 214 | |
| 215 | def test_gc(self): |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 216 | for tp in self._types: |
| 217 | if not isinstance(tp, type): |
| 218 | # If tp is a factory rather than a plain type, skip |
| 219 | continue |
Antoine Pitrou | c6b09eb | 2008-09-01 15:10:14 +0000 | [diff] [blame] | 220 | |
Stefan Krah | 9a2d99e | 2012-02-25 12:24:21 +0100 | [diff] [blame] | 221 | class MyView(): |
| 222 | def __init__(self, base): |
| 223 | self.m = memoryview(base) |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 224 | class MySource(tp): |
| 225 | pass |
| 226 | class MyObject: |
| 227 | pass |
| 228 | |
Stefan Krah | 9a2d99e | 2012-02-25 12:24:21 +0100 | [diff] [blame] | 229 | # Create a reference cycle through a memoryview object. |
| 230 | # This exercises mbuf_clear(). |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 231 | b = MySource(tp(b'abc')) |
| 232 | m = self._view(b) |
| 233 | o = MyObject() |
| 234 | b.m = m |
| 235 | b.o = o |
| 236 | wr = weakref.ref(o) |
| 237 | b = m = o = None |
| 238 | # The cycle must be broken |
| 239 | gc.collect() |
Benjamin Peterson | c9c0f20 | 2009-06-30 23:06:06 +0000 | [diff] [blame] | 240 | self.assertTrue(wr() is None, wr()) |
Antoine Pitrou | c6b09eb | 2008-09-01 15:10:14 +0000 | [diff] [blame] | 241 | |
Stefan Krah | 9a2d99e | 2012-02-25 12:24:21 +0100 | [diff] [blame] | 242 | # This exercises memory_clear(). |
| 243 | m = MyView(tp(b'abc')) |
| 244 | o = MyObject() |
| 245 | m.x = m |
| 246 | m.o = o |
| 247 | wr = weakref.ref(o) |
| 248 | m = o = None |
| 249 | # The cycle must be broken |
| 250 | gc.collect() |
| 251 | self.assertTrue(wr() is None, wr()) |
| 252 | |
Antoine Pitrou | 6e6cc83 | 2010-09-09 12:59:39 +0000 | [diff] [blame] | 253 | def _check_released(self, m, tp): |
Ezio Melotti | ed3a7d2 | 2010-12-01 02:32:32 +0000 | [diff] [blame] | 254 | check = self.assertRaisesRegex(ValueError, "released") |
Antoine Pitrou | 6e6cc83 | 2010-09-09 12:59:39 +0000 | [diff] [blame] | 255 | with check: bytes(m) |
| 256 | with check: m.tobytes() |
| 257 | with check: m.tolist() |
| 258 | with check: m[0] |
| 259 | with check: m[0] = b'x' |
| 260 | with check: len(m) |
| 261 | with check: m.format |
| 262 | with check: m.itemsize |
| 263 | with check: m.ndim |
| 264 | with check: m.readonly |
| 265 | with check: m.shape |
| 266 | with check: m.strides |
| 267 | with check: |
| 268 | with m: |
| 269 | pass |
| 270 | # str() and repr() still function |
| 271 | self.assertIn("released memory", str(m)) |
| 272 | self.assertIn("released memory", repr(m)) |
| 273 | self.assertEqual(m, m) |
| 274 | self.assertNotEqual(m, memoryview(tp(self._source))) |
| 275 | self.assertNotEqual(m, tp(self._source)) |
| 276 | |
| 277 | def test_contextmanager(self): |
| 278 | for tp in self._types: |
| 279 | b = tp(self._source) |
| 280 | m = self._view(b) |
| 281 | with m as cm: |
| 282 | self.assertIs(cm, m) |
| 283 | self._check_released(m, tp) |
| 284 | m = self._view(b) |
| 285 | # Can release explicitly inside the context manager |
| 286 | with m: |
| 287 | m.release() |
| 288 | |
| 289 | def test_release(self): |
| 290 | for tp in self._types: |
| 291 | b = tp(self._source) |
| 292 | m = self._view(b) |
| 293 | m.release() |
| 294 | self._check_released(m, tp) |
| 295 | # Can be called a second time (it's a no-op) |
| 296 | m.release() |
| 297 | self._check_released(m, tp) |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 298 | |
Antoine Pitrou | ad62b03 | 2011-01-18 18:57:52 +0000 | [diff] [blame] | 299 | def test_writable_readonly(self): |
| 300 | # Issue #10451: memoryview incorrectly exposes a readonly |
| 301 | # buffer as writable causing a segfault if using mmap |
| 302 | tp = self.ro_type |
| 303 | if tp is None: |
Zachary Ware | 9fe6d86 | 2013-12-08 00:20:35 -0600 | [diff] [blame] | 304 | self.skipTest("no read-only type to test") |
Antoine Pitrou | ad62b03 | 2011-01-18 18:57:52 +0000 | [diff] [blame] | 305 | b = tp(self._source) |
| 306 | m = self._view(b) |
| 307 | i = io.BytesIO(b'ZZZZ') |
| 308 | self.assertRaises(TypeError, i.readinto, m) |
| 309 | |
Stefan Krah | 9a2d99e | 2012-02-25 12:24:21 +0100 | [diff] [blame] | 310 | def test_getbuf_fail(self): |
| 311 | self.assertRaises(TypeError, self._view, {}) |
| 312 | |
Antoine Pitrou | ce4a9da | 2011-11-21 20:46:33 +0100 | [diff] [blame] | 313 | def test_hash(self): |
| 314 | # Memoryviews of readonly (hashable) types are hashable, and they |
Stefan Krah | 9a2d99e | 2012-02-25 12:24:21 +0100 | [diff] [blame] | 315 | # hash as hash(obj.tobytes()). |
Antoine Pitrou | ce4a9da | 2011-11-21 20:46:33 +0100 | [diff] [blame] | 316 | tp = self.ro_type |
| 317 | if tp is None: |
| 318 | self.skipTest("no read-only type to test") |
| 319 | b = tp(self._source) |
| 320 | m = self._view(b) |
| 321 | self.assertEqual(hash(m), hash(b"abcdef")) |
| 322 | # Releasing the memoryview keeps the stored hash value (as with weakrefs) |
| 323 | m.release() |
| 324 | self.assertEqual(hash(m), hash(b"abcdef")) |
| 325 | # Hashing a memoryview for the first time after it is released |
| 326 | # results in an error (as with weakrefs). |
| 327 | m = self._view(b) |
| 328 | m.release() |
| 329 | self.assertRaises(ValueError, hash, m) |
| 330 | |
| 331 | def test_hash_writable(self): |
| 332 | # Memoryviews of writable types are unhashable |
| 333 | tp = self.rw_type |
| 334 | if tp is None: |
| 335 | self.skipTest("no writable type to test") |
| 336 | b = tp(self._source) |
| 337 | m = self._view(b) |
| 338 | self.assertRaises(ValueError, hash, m) |
| 339 | |
Richard Oudkerk | 3e0a1eb | 2012-05-28 21:35:09 +0100 | [diff] [blame] | 340 | def test_weakref(self): |
| 341 | # Check memoryviews are weakrefable |
| 342 | for tp in self._types: |
| 343 | b = tp(self._source) |
| 344 | m = self._view(b) |
| 345 | L = [] |
| 346 | def callback(wr, b=b): |
| 347 | L.append(b) |
| 348 | wr = weakref.ref(m, callback) |
| 349 | self.assertIs(wr(), m) |
| 350 | del m |
| 351 | test.support.gc_collect() |
| 352 | self.assertIs(wr(), None) |
| 353 | self.assertIs(L[0], b) |
| 354 | |
Nick Coghlan | a0f169c | 2013-10-02 22:06:54 +1000 | [diff] [blame] | 355 | def test_reversed(self): |
| 356 | for tp in self._types: |
| 357 | b = tp(self._source) |
| 358 | m = self._view(b) |
| 359 | aslist = list(reversed(m.tolist())) |
| 360 | self.assertEqual(list(reversed(m)), aslist) |
| 361 | self.assertEqual(list(reversed(m)), list(m[::-1])) |
| 362 | |
Stefan Krah | fa5d6a5 | 2015-01-29 14:27:23 +0100 | [diff] [blame] | 363 | def test_issue22668(self): |
Stefan Krah | 3c0cf05 | 2015-01-29 17:33:31 +0100 | [diff] [blame] | 364 | a = array.array('H', [256, 256, 256, 256]) |
| 365 | x = memoryview(a) |
| 366 | m = x.cast('B') |
Stefan Krah | fa5d6a5 | 2015-01-29 14:27:23 +0100 | [diff] [blame] | 367 | b = m.cast('H') |
| 368 | c = b[0:2] |
| 369 | d = memoryview(b) |
| 370 | |
| 371 | del b |
Stefan Krah | 3c0cf05 | 2015-01-29 17:33:31 +0100 | [diff] [blame] | 372 | |
Stefan Krah | fa5d6a5 | 2015-01-29 14:27:23 +0100 | [diff] [blame] | 373 | self.assertEqual(c[0], 256) |
| 374 | self.assertEqual(d[0], 256) |
| 375 | self.assertEqual(c.format, "H") |
| 376 | self.assertEqual(d.format, "H") |
Stefan Krah | 3c0cf05 | 2015-01-29 17:33:31 +0100 | [diff] [blame] | 377 | |
Stefan Krah | fa5d6a5 | 2015-01-29 14:27:23 +0100 | [diff] [blame] | 378 | _ = m.cast('I') |
| 379 | self.assertEqual(c[0], 256) |
| 380 | self.assertEqual(d[0], 256) |
| 381 | self.assertEqual(c.format, "H") |
| 382 | self.assertEqual(d.format, "H") |
| 383 | |
Nick Coghlan | a0f169c | 2013-10-02 22:06:54 +1000 | [diff] [blame] | 384 | |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 385 | # Variations on source objects for the buffer: bytes-like objects, then arrays |
| 386 | # with itemsize > 1. |
| 387 | # NOTE: support for multi-dimensional objects is unimplemented. |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 388 | |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 389 | class BaseBytesMemoryTests(AbstractMemoryTests): |
| 390 | ro_type = bytes |
| 391 | rw_type = bytearray |
| 392 | getitem_type = bytes |
| 393 | itemsize = 1 |
| 394 | format = 'B' |
| 395 | |
| 396 | class BaseArrayMemoryTests(AbstractMemoryTests): |
| 397 | ro_type = None |
| 398 | rw_type = lambda self, b: array.array('i', list(b)) |
Antoine Pitrou | 1ce3eb5 | 2010-09-01 20:29:34 +0000 | [diff] [blame] | 399 | getitem_type = lambda self, b: array.array('i', list(b)).tobytes() |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 400 | itemsize = array.array('i').itemsize |
| 401 | format = 'i' |
| 402 | |
Zachary Ware | 9fe6d86 | 2013-12-08 00:20:35 -0600 | [diff] [blame] | 403 | @unittest.skip('XXX test should be adapted for non-byte buffers') |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 404 | def test_getbuffer(self): |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 405 | pass |
| 406 | |
Zachary Ware | 9fe6d86 | 2013-12-08 00:20:35 -0600 | [diff] [blame] | 407 | @unittest.skip('XXX NotImplementedError: tolist() only supports byte views') |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 408 | def test_tolist(self): |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 409 | pass |
| 410 | |
| 411 | |
| 412 | # Variations on indirection levels: memoryview, slice of memoryview, |
| 413 | # slice of slice of memoryview. |
| 414 | # This is important to test allocation subtleties. |
| 415 | |
| 416 | class BaseMemoryviewTests: |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 417 | def _view(self, obj): |
| 418 | return memoryview(obj) |
| 419 | |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 420 | def _check_contents(self, tp, obj, contents): |
Ezio Melotti | b3aedd4 | 2010-11-20 19:04:17 +0000 | [diff] [blame] | 421 | self.assertEqual(obj, tp(contents)) |
Christian Heimes | 7b6fc8e | 2007-11-08 02:28:11 +0000 | [diff] [blame] | 422 | |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 423 | class BaseMemorySliceTests: |
| 424 | source_bytes = b"XabcdefY" |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 425 | |
| 426 | def _view(self, obj): |
| 427 | m = memoryview(obj) |
| 428 | return m[1:7] |
| 429 | |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 430 | def _check_contents(self, tp, obj, contents): |
Ezio Melotti | b3aedd4 | 2010-11-20 19:04:17 +0000 | [diff] [blame] | 431 | self.assertEqual(obj[1:7], tp(contents)) |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 432 | |
| 433 | def test_refs(self): |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 434 | for tp in self._types: |
| 435 | m = memoryview(tp(self._source)) |
| 436 | oldrefcount = sys.getrefcount(m) |
| 437 | m[1:2] |
Ezio Melotti | b3aedd4 | 2010-11-20 19:04:17 +0000 | [diff] [blame] | 438 | self.assertEqual(sys.getrefcount(m), oldrefcount) |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 439 | |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 440 | class BaseMemorySliceSliceTests: |
| 441 | source_bytes = b"XabcdefY" |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 442 | |
| 443 | def _view(self, obj): |
| 444 | m = memoryview(obj) |
| 445 | return m[:7][1:] |
| 446 | |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 447 | def _check_contents(self, tp, obj, contents): |
Ezio Melotti | b3aedd4 | 2010-11-20 19:04:17 +0000 | [diff] [blame] | 448 | self.assertEqual(obj[1:7], tp(contents)) |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 449 | |
| 450 | |
| 451 | # Concrete test classes |
| 452 | |
| 453 | class BytesMemoryviewTest(unittest.TestCase, |
| 454 | BaseMemoryviewTests, BaseBytesMemoryTests): |
| 455 | |
| 456 | def test_constructor(self): |
| 457 | for tp in self._types: |
| 458 | ob = tp(self._source) |
Benjamin Peterson | c9c0f20 | 2009-06-30 23:06:06 +0000 | [diff] [blame] | 459 | self.assertTrue(memoryview(ob)) |
| 460 | self.assertTrue(memoryview(object=ob)) |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 461 | self.assertRaises(TypeError, memoryview) |
| 462 | self.assertRaises(TypeError, memoryview, ob, ob) |
| 463 | self.assertRaises(TypeError, memoryview, argument=ob) |
| 464 | self.assertRaises(TypeError, memoryview, ob, argument=True) |
| 465 | |
| 466 | class ArrayMemoryviewTest(unittest.TestCase, |
| 467 | BaseMemoryviewTests, BaseArrayMemoryTests): |
| 468 | |
| 469 | def test_array_assign(self): |
| 470 | # Issue #4569: segfault when mutating a memoryview with itemsize != 1 |
| 471 | a = array.array('i', range(10)) |
| 472 | m = memoryview(a) |
| 473 | new_a = array.array('i', range(9, -1, -1)) |
| 474 | m[:] = new_a |
Ezio Melotti | b3aedd4 | 2010-11-20 19:04:17 +0000 | [diff] [blame] | 475 | self.assertEqual(a, new_a) |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 476 | |
| 477 | |
| 478 | class BytesMemorySliceTest(unittest.TestCase, |
| 479 | BaseMemorySliceTests, BaseBytesMemoryTests): |
| 480 | pass |
| 481 | |
| 482 | class ArrayMemorySliceTest(unittest.TestCase, |
| 483 | BaseMemorySliceTests, BaseArrayMemoryTests): |
| 484 | pass |
| 485 | |
| 486 | class BytesMemorySliceSliceTest(unittest.TestCase, |
| 487 | BaseMemorySliceSliceTests, BaseBytesMemoryTests): |
| 488 | pass |
| 489 | |
| 490 | class ArrayMemorySliceSliceTest(unittest.TestCase, |
| 491 | BaseMemorySliceSliceTests, BaseArrayMemoryTests): |
| 492 | pass |
Antoine Pitrou | 616d285 | 2008-08-19 22:09:34 +0000 | [diff] [blame] | 493 | |
| 494 | |
Christian Heimes | 7b6fc8e | 2007-11-08 02:28:11 +0000 | [diff] [blame] | 495 | def test_main(): |
Antoine Pitrou | c3b3924 | 2009-01-03 16:59:18 +0000 | [diff] [blame] | 496 | test.support.run_unittest(__name__) |
Christian Heimes | 7b6fc8e | 2007-11-08 02:28:11 +0000 | [diff] [blame] | 497 | |
| 498 | if __name__ == "__main__": |
| 499 | test_main() |