| 1 | n/a | """Unit tests for the memoryview |
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| 2 | n/a | |
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| 3 | n/a | Some tests are in test_bytes. Many tests that require _testbuffer.ndarray |
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| 4 | n/a | are in test_buffer. |
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| 5 | n/a | """ |
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| 6 | n/a | |
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| 7 | n/a | import unittest |
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| 8 | n/a | import test.support |
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| 9 | n/a | import sys |
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| 10 | n/a | import gc |
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| 11 | n/a | import weakref |
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| 12 | n/a | import array |
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| 13 | n/a | import io |
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| 14 | n/a | import copy |
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| 15 | n/a | import pickle |
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| 16 | n/a | |
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| 17 | n/a | |
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| 18 | n/a | class AbstractMemoryTests: |
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| 19 | n/a | source_bytes = b"abcdef" |
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| 20 | n/a | |
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| 21 | n/a | @property |
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| 22 | n/a | def _source(self): |
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| 23 | n/a | return self.source_bytes |
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| 24 | n/a | |
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| 25 | n/a | @property |
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| 26 | n/a | def _types(self): |
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| 27 | n/a | return filter(None, [self.ro_type, self.rw_type]) |
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| 28 | n/a | |
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| 29 | n/a | def check_getitem_with_type(self, tp): |
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| 30 | n/a | b = tp(self._source) |
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| 31 | n/a | oldrefcount = sys.getrefcount(b) |
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| 32 | n/a | m = self._view(b) |
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| 33 | n/a | self.assertEqual(m[0], ord(b"a")) |
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| 34 | n/a | self.assertIsInstance(m[0], int) |
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| 35 | n/a | self.assertEqual(m[5], ord(b"f")) |
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| 36 | n/a | self.assertEqual(m[-1], ord(b"f")) |
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| 37 | n/a | self.assertEqual(m[-6], ord(b"a")) |
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| 38 | n/a | # Bounds checking |
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| 39 | n/a | self.assertRaises(IndexError, lambda: m[6]) |
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| 40 | n/a | self.assertRaises(IndexError, lambda: m[-7]) |
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| 41 | n/a | self.assertRaises(IndexError, lambda: m[sys.maxsize]) |
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| 42 | n/a | self.assertRaises(IndexError, lambda: m[-sys.maxsize]) |
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| 43 | n/a | # Type checking |
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| 44 | n/a | self.assertRaises(TypeError, lambda: m[None]) |
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| 45 | n/a | self.assertRaises(TypeError, lambda: m[0.0]) |
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| 46 | n/a | self.assertRaises(TypeError, lambda: m["a"]) |
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| 47 | n/a | m = None |
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| 48 | n/a | self.assertEqual(sys.getrefcount(b), oldrefcount) |
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| 49 | n/a | |
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| 50 | n/a | def test_getitem(self): |
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| 51 | n/a | for tp in self._types: |
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| 52 | n/a | self.check_getitem_with_type(tp) |
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| 53 | n/a | |
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| 54 | n/a | def test_iter(self): |
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| 55 | n/a | for tp in self._types: |
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| 56 | n/a | b = tp(self._source) |
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| 57 | n/a | m = self._view(b) |
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| 58 | n/a | self.assertEqual(list(m), [m[i] for i in range(len(m))]) |
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| 59 | n/a | |
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| 60 | n/a | def test_setitem_readonly(self): |
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| 61 | n/a | if not self.ro_type: |
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| 62 | n/a | self.skipTest("no read-only type to test") |
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| 63 | n/a | b = self.ro_type(self._source) |
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| 64 | n/a | oldrefcount = sys.getrefcount(b) |
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| 65 | n/a | m = self._view(b) |
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| 66 | n/a | def setitem(value): |
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| 67 | n/a | m[0] = value |
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| 68 | n/a | self.assertRaises(TypeError, setitem, b"a") |
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| 69 | n/a | self.assertRaises(TypeError, setitem, 65) |
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| 70 | n/a | self.assertRaises(TypeError, setitem, memoryview(b"a")) |
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| 71 | n/a | m = None |
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| 72 | n/a | self.assertEqual(sys.getrefcount(b), oldrefcount) |
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| 73 | n/a | |
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| 74 | n/a | def test_setitem_writable(self): |
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| 75 | n/a | if not self.rw_type: |
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| 76 | n/a | self.skipTest("no writable type to test") |
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| 77 | n/a | tp = self.rw_type |
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| 78 | n/a | b = self.rw_type(self._source) |
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| 79 | n/a | oldrefcount = sys.getrefcount(b) |
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| 80 | n/a | m = self._view(b) |
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| 81 | n/a | m[0] = ord(b'1') |
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| 82 | n/a | self._check_contents(tp, b, b"1bcdef") |
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| 83 | n/a | m[0:1] = tp(b"0") |
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| 84 | n/a | self._check_contents(tp, b, b"0bcdef") |
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| 85 | n/a | m[1:3] = tp(b"12") |
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| 86 | n/a | self._check_contents(tp, b, b"012def") |
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| 87 | n/a | m[1:1] = tp(b"") |
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| 88 | n/a | self._check_contents(tp, b, b"012def") |
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| 89 | n/a | m[:] = tp(b"abcdef") |
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| 90 | n/a | self._check_contents(tp, b, b"abcdef") |
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| 91 | n/a | |
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| 92 | n/a | # Overlapping copies of a view into itself |
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| 93 | n/a | m[0:3] = m[2:5] |
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| 94 | n/a | self._check_contents(tp, b, b"cdedef") |
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| 95 | n/a | m[:] = tp(b"abcdef") |
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| 96 | n/a | m[2:5] = m[0:3] |
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| 97 | n/a | self._check_contents(tp, b, b"ababcf") |
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| 98 | n/a | |
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| 99 | n/a | def setitem(key, value): |
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| 100 | n/a | m[key] = tp(value) |
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| 101 | n/a | # Bounds checking |
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| 102 | n/a | self.assertRaises(IndexError, setitem, 6, b"a") |
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| 103 | n/a | self.assertRaises(IndexError, setitem, -7, b"a") |
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| 104 | n/a | self.assertRaises(IndexError, setitem, sys.maxsize, b"a") |
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| 105 | n/a | self.assertRaises(IndexError, setitem, -sys.maxsize, b"a") |
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| 106 | n/a | # Wrong index/slice types |
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| 107 | n/a | self.assertRaises(TypeError, setitem, 0.0, b"a") |
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| 108 | n/a | self.assertRaises(TypeError, setitem, (0,), b"a") |
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| 109 | n/a | self.assertRaises(TypeError, setitem, (slice(0,1,1), 0), b"a") |
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| 110 | n/a | self.assertRaises(TypeError, setitem, (0, slice(0,1,1)), b"a") |
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| 111 | n/a | self.assertRaises(TypeError, setitem, (0,), b"a") |
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| 112 | n/a | self.assertRaises(TypeError, setitem, "a", b"a") |
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| 113 | n/a | # Not implemented: multidimensional slices |
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| 114 | n/a | slices = (slice(0,1,1), slice(0,1,2)) |
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| 115 | n/a | self.assertRaises(NotImplementedError, setitem, slices, b"a") |
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| 116 | n/a | # Trying to resize the memory object |
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| 117 | n/a | exc = ValueError if m.format == 'c' else TypeError |
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| 118 | n/a | self.assertRaises(exc, setitem, 0, b"") |
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| 119 | n/a | self.assertRaises(exc, setitem, 0, b"ab") |
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| 120 | n/a | self.assertRaises(ValueError, setitem, slice(1,1), b"a") |
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| 121 | n/a | self.assertRaises(ValueError, setitem, slice(0,2), b"a") |
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| 122 | n/a | |
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| 123 | n/a | m = None |
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| 124 | n/a | self.assertEqual(sys.getrefcount(b), oldrefcount) |
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| 125 | n/a | |
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| 126 | n/a | def test_delitem(self): |
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| 127 | n/a | for tp in self._types: |
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| 128 | n/a | b = tp(self._source) |
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| 129 | n/a | m = self._view(b) |
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| 130 | n/a | with self.assertRaises(TypeError): |
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| 131 | n/a | del m[1] |
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| 132 | n/a | with self.assertRaises(TypeError): |
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| 133 | n/a | del m[1:4] |
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| 134 | n/a | |
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| 135 | n/a | def test_tobytes(self): |
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| 136 | n/a | for tp in self._types: |
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| 137 | n/a | m = self._view(tp(self._source)) |
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| 138 | n/a | b = m.tobytes() |
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| 139 | n/a | # This calls self.getitem_type() on each separate byte of b"abcdef" |
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| 140 | n/a | expected = b"".join( |
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| 141 | n/a | self.getitem_type(bytes([c])) for c in b"abcdef") |
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| 142 | n/a | self.assertEqual(b, expected) |
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| 143 | n/a | self.assertIsInstance(b, bytes) |
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| 144 | n/a | |
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| 145 | n/a | def test_tolist(self): |
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| 146 | n/a | for tp in self._types: |
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| 147 | n/a | m = self._view(tp(self._source)) |
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| 148 | n/a | l = m.tolist() |
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| 149 | n/a | self.assertEqual(l, list(b"abcdef")) |
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| 150 | n/a | |
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| 151 | n/a | def test_compare(self): |
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| 152 | n/a | # memoryviews can compare for equality with other objects |
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| 153 | n/a | # having the buffer interface. |
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| 154 | n/a | for tp in self._types: |
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| 155 | n/a | m = self._view(tp(self._source)) |
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| 156 | n/a | for tp_comp in self._types: |
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| 157 | n/a | self.assertTrue(m == tp_comp(b"abcdef")) |
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| 158 | n/a | self.assertFalse(m != tp_comp(b"abcdef")) |
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| 159 | n/a | self.assertFalse(m == tp_comp(b"abcde")) |
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| 160 | n/a | self.assertTrue(m != tp_comp(b"abcde")) |
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| 161 | n/a | self.assertFalse(m == tp_comp(b"abcde1")) |
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| 162 | n/a | self.assertTrue(m != tp_comp(b"abcde1")) |
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| 163 | n/a | self.assertTrue(m == m) |
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| 164 | n/a | self.assertTrue(m == m[:]) |
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| 165 | n/a | self.assertTrue(m[0:6] == m[:]) |
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| 166 | n/a | self.assertFalse(m[0:5] == m) |
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| 167 | n/a | |
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| 168 | n/a | # Comparison with objects which don't support the buffer API |
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| 169 | n/a | self.assertFalse(m == "abcdef") |
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| 170 | n/a | self.assertTrue(m != "abcdef") |
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| 171 | n/a | self.assertFalse("abcdef" == m) |
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| 172 | n/a | self.assertTrue("abcdef" != m) |
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| 173 | n/a | |
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| 174 | n/a | # Unordered comparisons |
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| 175 | n/a | for c in (m, b"abcdef"): |
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| 176 | n/a | self.assertRaises(TypeError, lambda: m < c) |
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| 177 | n/a | self.assertRaises(TypeError, lambda: c <= m) |
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| 178 | n/a | self.assertRaises(TypeError, lambda: m >= c) |
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| 179 | n/a | self.assertRaises(TypeError, lambda: c > m) |
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| 180 | n/a | |
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| 181 | n/a | def check_attributes_with_type(self, tp): |
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| 182 | n/a | m = self._view(tp(self._source)) |
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| 183 | n/a | self.assertEqual(m.format, self.format) |
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| 184 | n/a | self.assertEqual(m.itemsize, self.itemsize) |
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| 185 | n/a | self.assertEqual(m.ndim, 1) |
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| 186 | n/a | self.assertEqual(m.shape, (6,)) |
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| 187 | n/a | self.assertEqual(len(m), 6) |
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| 188 | n/a | self.assertEqual(m.strides, (self.itemsize,)) |
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| 189 | n/a | self.assertEqual(m.suboffsets, ()) |
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| 190 | n/a | return m |
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| 191 | n/a | |
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| 192 | n/a | def test_attributes_readonly(self): |
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| 193 | n/a | if not self.ro_type: |
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| 194 | n/a | self.skipTest("no read-only type to test") |
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| 195 | n/a | m = self.check_attributes_with_type(self.ro_type) |
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| 196 | n/a | self.assertEqual(m.readonly, True) |
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| 197 | n/a | |
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| 198 | n/a | def test_attributes_writable(self): |
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| 199 | n/a | if not self.rw_type: |
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| 200 | n/a | self.skipTest("no writable type to test") |
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| 201 | n/a | m = self.check_attributes_with_type(self.rw_type) |
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| 202 | n/a | self.assertEqual(m.readonly, False) |
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| 203 | n/a | |
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| 204 | n/a | def test_getbuffer(self): |
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| 205 | n/a | # Test PyObject_GetBuffer() on a memoryview object. |
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| 206 | n/a | for tp in self._types: |
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| 207 | n/a | b = tp(self._source) |
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| 208 | n/a | oldrefcount = sys.getrefcount(b) |
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| 209 | n/a | m = self._view(b) |
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| 210 | n/a | oldviewrefcount = sys.getrefcount(m) |
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| 211 | n/a | s = str(m, "utf-8") |
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| 212 | n/a | self._check_contents(tp, b, s.encode("utf-8")) |
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| 213 | n/a | self.assertEqual(sys.getrefcount(m), oldviewrefcount) |
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| 214 | n/a | m = None |
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| 215 | n/a | self.assertEqual(sys.getrefcount(b), oldrefcount) |
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| 216 | n/a | |
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| 217 | n/a | def test_gc(self): |
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| 218 | n/a | for tp in self._types: |
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| 219 | n/a | if not isinstance(tp, type): |
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| 220 | n/a | # If tp is a factory rather than a plain type, skip |
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| 221 | n/a | continue |
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| 222 | n/a | |
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| 223 | n/a | class MyView(): |
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| 224 | n/a | def __init__(self, base): |
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| 225 | n/a | self.m = memoryview(base) |
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| 226 | n/a | class MySource(tp): |
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| 227 | n/a | pass |
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| 228 | n/a | class MyObject: |
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| 229 | n/a | pass |
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| 230 | n/a | |
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| 231 | n/a | # Create a reference cycle through a memoryview object. |
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| 232 | n/a | # This exercises mbuf_clear(). |
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| 233 | n/a | b = MySource(tp(b'abc')) |
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| 234 | n/a | m = self._view(b) |
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| 235 | n/a | o = MyObject() |
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| 236 | n/a | b.m = m |
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| 237 | n/a | b.o = o |
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| 238 | n/a | wr = weakref.ref(o) |
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| 239 | n/a | b = m = o = None |
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| 240 | n/a | # The cycle must be broken |
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| 241 | n/a | gc.collect() |
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| 242 | n/a | self.assertTrue(wr() is None, wr()) |
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| 243 | n/a | |
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| 244 | n/a | # This exercises memory_clear(). |
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| 245 | n/a | m = MyView(tp(b'abc')) |
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| 246 | n/a | o = MyObject() |
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| 247 | n/a | m.x = m |
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| 248 | n/a | m.o = o |
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| 249 | n/a | wr = weakref.ref(o) |
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| 250 | n/a | m = o = None |
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| 251 | n/a | # The cycle must be broken |
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| 252 | n/a | gc.collect() |
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| 253 | n/a | self.assertTrue(wr() is None, wr()) |
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| 254 | n/a | |
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| 255 | n/a | def _check_released(self, m, tp): |
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| 256 | n/a | check = self.assertRaisesRegex(ValueError, "released") |
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| 257 | n/a | with check: bytes(m) |
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| 258 | n/a | with check: m.tobytes() |
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| 259 | n/a | with check: m.tolist() |
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| 260 | n/a | with check: m[0] |
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| 261 | n/a | with check: m[0] = b'x' |
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| 262 | n/a | with check: len(m) |
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| 263 | n/a | with check: m.format |
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| 264 | n/a | with check: m.itemsize |
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| 265 | n/a | with check: m.ndim |
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| 266 | n/a | with check: m.readonly |
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| 267 | n/a | with check: m.shape |
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| 268 | n/a | with check: m.strides |
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| 269 | n/a | with check: |
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| 270 | n/a | with m: |
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| 271 | n/a | pass |
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| 272 | n/a | # str() and repr() still function |
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| 273 | n/a | self.assertIn("released memory", str(m)) |
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| 274 | n/a | self.assertIn("released memory", repr(m)) |
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| 275 | n/a | self.assertEqual(m, m) |
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| 276 | n/a | self.assertNotEqual(m, memoryview(tp(self._source))) |
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| 277 | n/a | self.assertNotEqual(m, tp(self._source)) |
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| 278 | n/a | |
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| 279 | n/a | def test_contextmanager(self): |
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| 280 | n/a | for tp in self._types: |
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| 281 | n/a | b = tp(self._source) |
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| 282 | n/a | m = self._view(b) |
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| 283 | n/a | with m as cm: |
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| 284 | n/a | self.assertIs(cm, m) |
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| 285 | n/a | self._check_released(m, tp) |
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| 286 | n/a | m = self._view(b) |
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| 287 | n/a | # Can release explicitly inside the context manager |
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| 288 | n/a | with m: |
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| 289 | n/a | m.release() |
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| 290 | n/a | |
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| 291 | n/a | def test_release(self): |
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| 292 | n/a | for tp in self._types: |
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| 293 | n/a | b = tp(self._source) |
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| 294 | n/a | m = self._view(b) |
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| 295 | n/a | m.release() |
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| 296 | n/a | self._check_released(m, tp) |
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| 297 | n/a | # Can be called a second time (it's a no-op) |
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| 298 | n/a | m.release() |
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| 299 | n/a | self._check_released(m, tp) |
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| 300 | n/a | |
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| 301 | n/a | def test_writable_readonly(self): |
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| 302 | n/a | # Issue #10451: memoryview incorrectly exposes a readonly |
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| 303 | n/a | # buffer as writable causing a segfault if using mmap |
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| 304 | n/a | tp = self.ro_type |
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| 305 | n/a | if tp is None: |
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| 306 | n/a | self.skipTest("no read-only type to test") |
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| 307 | n/a | b = tp(self._source) |
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| 308 | n/a | m = self._view(b) |
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| 309 | n/a | i = io.BytesIO(b'ZZZZ') |
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| 310 | n/a | self.assertRaises(TypeError, i.readinto, m) |
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| 311 | n/a | |
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| 312 | n/a | def test_getbuf_fail(self): |
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| 313 | n/a | self.assertRaises(TypeError, self._view, {}) |
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| 314 | n/a | |
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| 315 | n/a | def test_hash(self): |
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| 316 | n/a | # Memoryviews of readonly (hashable) types are hashable, and they |
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| 317 | n/a | # hash as hash(obj.tobytes()). |
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| 318 | n/a | tp = self.ro_type |
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| 319 | n/a | if tp is None: |
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| 320 | n/a | self.skipTest("no read-only type to test") |
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| 321 | n/a | b = tp(self._source) |
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| 322 | n/a | m = self._view(b) |
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| 323 | n/a | self.assertEqual(hash(m), hash(b"abcdef")) |
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| 324 | n/a | # Releasing the memoryview keeps the stored hash value (as with weakrefs) |
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| 325 | n/a | m.release() |
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| 326 | n/a | self.assertEqual(hash(m), hash(b"abcdef")) |
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| 327 | n/a | # Hashing a memoryview for the first time after it is released |
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| 328 | n/a | # results in an error (as with weakrefs). |
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| 329 | n/a | m = self._view(b) |
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| 330 | n/a | m.release() |
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| 331 | n/a | self.assertRaises(ValueError, hash, m) |
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| 332 | n/a | |
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| 333 | n/a | def test_hash_writable(self): |
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| 334 | n/a | # Memoryviews of writable types are unhashable |
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| 335 | n/a | tp = self.rw_type |
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| 336 | n/a | if tp is None: |
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| 337 | n/a | self.skipTest("no writable type to test") |
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| 338 | n/a | b = tp(self._source) |
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| 339 | n/a | m = self._view(b) |
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| 340 | n/a | self.assertRaises(ValueError, hash, m) |
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| 341 | n/a | |
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| 342 | n/a | def test_weakref(self): |
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| 343 | n/a | # Check memoryviews are weakrefable |
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| 344 | n/a | for tp in self._types: |
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| 345 | n/a | b = tp(self._source) |
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| 346 | n/a | m = self._view(b) |
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| 347 | n/a | L = [] |
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| 348 | n/a | def callback(wr, b=b): |
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| 349 | n/a | L.append(b) |
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| 350 | n/a | wr = weakref.ref(m, callback) |
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| 351 | n/a | self.assertIs(wr(), m) |
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| 352 | n/a | del m |
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| 353 | n/a | test.support.gc_collect() |
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| 354 | n/a | self.assertIs(wr(), None) |
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| 355 | n/a | self.assertIs(L[0], b) |
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| 356 | n/a | |
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| 357 | n/a | def test_reversed(self): |
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| 358 | n/a | for tp in self._types: |
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| 359 | n/a | b = tp(self._source) |
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| 360 | n/a | m = self._view(b) |
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| 361 | n/a | aslist = list(reversed(m.tolist())) |
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| 362 | n/a | self.assertEqual(list(reversed(m)), aslist) |
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| 363 | n/a | self.assertEqual(list(reversed(m)), list(m[::-1])) |
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| 364 | n/a | |
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| 365 | n/a | def test_issue22668(self): |
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| 366 | n/a | a = array.array('H', [256, 256, 256, 256]) |
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| 367 | n/a | x = memoryview(a) |
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| 368 | n/a | m = x.cast('B') |
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| 369 | n/a | b = m.cast('H') |
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| 370 | n/a | c = b[0:2] |
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| 371 | n/a | d = memoryview(b) |
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| 372 | n/a | |
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| 373 | n/a | del b |
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| 374 | n/a | |
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| 375 | n/a | self.assertEqual(c[0], 256) |
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| 376 | n/a | self.assertEqual(d[0], 256) |
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| 377 | n/a | self.assertEqual(c.format, "H") |
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| 378 | n/a | self.assertEqual(d.format, "H") |
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| 379 | n/a | |
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| 380 | n/a | _ = m.cast('I') |
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| 381 | n/a | self.assertEqual(c[0], 256) |
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| 382 | n/a | self.assertEqual(d[0], 256) |
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| 383 | n/a | self.assertEqual(c.format, "H") |
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| 384 | n/a | self.assertEqual(d.format, "H") |
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| 385 | n/a | |
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| 386 | n/a | |
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| 387 | n/a | # Variations on source objects for the buffer: bytes-like objects, then arrays |
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| 388 | n/a | # with itemsize > 1. |
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| 389 | n/a | # NOTE: support for multi-dimensional objects is unimplemented. |
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| 390 | n/a | |
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| 391 | n/a | class BaseBytesMemoryTests(AbstractMemoryTests): |
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| 392 | n/a | ro_type = bytes |
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| 393 | n/a | rw_type = bytearray |
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| 394 | n/a | getitem_type = bytes |
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| 395 | n/a | itemsize = 1 |
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| 396 | n/a | format = 'B' |
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| 397 | n/a | |
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| 398 | n/a | class BaseArrayMemoryTests(AbstractMemoryTests): |
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| 399 | n/a | ro_type = None |
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| 400 | n/a | rw_type = lambda self, b: array.array('i', list(b)) |
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| 401 | n/a | getitem_type = lambda self, b: array.array('i', list(b)).tobytes() |
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| 402 | n/a | itemsize = array.array('i').itemsize |
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| 403 | n/a | format = 'i' |
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| 404 | n/a | |
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| 405 | n/a | @unittest.skip('XXX test should be adapted for non-byte buffers') |
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| 406 | n/a | def test_getbuffer(self): |
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| 407 | n/a | pass |
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| 408 | n/a | |
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| 409 | n/a | @unittest.skip('XXX NotImplementedError: tolist() only supports byte views') |
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| 410 | n/a | def test_tolist(self): |
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| 411 | n/a | pass |
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| 412 | n/a | |
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| 413 | n/a | |
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| 414 | n/a | # Variations on indirection levels: memoryview, slice of memoryview, |
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| 415 | n/a | # slice of slice of memoryview. |
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| 416 | n/a | # This is important to test allocation subtleties. |
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| 417 | n/a | |
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| 418 | n/a | class BaseMemoryviewTests: |
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| 419 | n/a | def _view(self, obj): |
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| 420 | n/a | return memoryview(obj) |
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| 421 | n/a | |
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| 422 | n/a | def _check_contents(self, tp, obj, contents): |
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| 423 | n/a | self.assertEqual(obj, tp(contents)) |
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| 424 | n/a | |
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| 425 | n/a | class BaseMemorySliceTests: |
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| 426 | n/a | source_bytes = b"XabcdefY" |
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| 427 | n/a | |
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| 428 | n/a | def _view(self, obj): |
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| 429 | n/a | m = memoryview(obj) |
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| 430 | n/a | return m[1:7] |
|---|
| 431 | n/a | |
|---|
| 432 | n/a | def _check_contents(self, tp, obj, contents): |
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| 433 | n/a | self.assertEqual(obj[1:7], tp(contents)) |
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| 434 | n/a | |
|---|
| 435 | n/a | def test_refs(self): |
|---|
| 436 | n/a | for tp in self._types: |
|---|
| 437 | n/a | m = memoryview(tp(self._source)) |
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| 438 | n/a | oldrefcount = sys.getrefcount(m) |
|---|
| 439 | n/a | m[1:2] |
|---|
| 440 | n/a | self.assertEqual(sys.getrefcount(m), oldrefcount) |
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| 441 | n/a | |
|---|
| 442 | n/a | class BaseMemorySliceSliceTests: |
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| 443 | n/a | source_bytes = b"XabcdefY" |
|---|
| 444 | n/a | |
|---|
| 445 | n/a | def _view(self, obj): |
|---|
| 446 | n/a | m = memoryview(obj) |
|---|
| 447 | n/a | return m[:7][1:] |
|---|
| 448 | n/a | |
|---|
| 449 | n/a | def _check_contents(self, tp, obj, contents): |
|---|
| 450 | n/a | self.assertEqual(obj[1:7], tp(contents)) |
|---|
| 451 | n/a | |
|---|
| 452 | n/a | |
|---|
| 453 | n/a | # Concrete test classes |
|---|
| 454 | n/a | |
|---|
| 455 | n/a | class BytesMemoryviewTest(unittest.TestCase, |
|---|
| 456 | n/a | BaseMemoryviewTests, BaseBytesMemoryTests): |
|---|
| 457 | n/a | |
|---|
| 458 | n/a | def test_constructor(self): |
|---|
| 459 | n/a | for tp in self._types: |
|---|
| 460 | n/a | ob = tp(self._source) |
|---|
| 461 | n/a | self.assertTrue(memoryview(ob)) |
|---|
| 462 | n/a | self.assertTrue(memoryview(object=ob)) |
|---|
| 463 | n/a | self.assertRaises(TypeError, memoryview) |
|---|
| 464 | n/a | self.assertRaises(TypeError, memoryview, ob, ob) |
|---|
| 465 | n/a | self.assertRaises(TypeError, memoryview, argument=ob) |
|---|
| 466 | n/a | self.assertRaises(TypeError, memoryview, ob, argument=True) |
|---|
| 467 | n/a | |
|---|
| 468 | n/a | class ArrayMemoryviewTest(unittest.TestCase, |
|---|
| 469 | n/a | BaseMemoryviewTests, BaseArrayMemoryTests): |
|---|
| 470 | n/a | |
|---|
| 471 | n/a | def test_array_assign(self): |
|---|
| 472 | n/a | # Issue #4569: segfault when mutating a memoryview with itemsize != 1 |
|---|
| 473 | n/a | a = array.array('i', range(10)) |
|---|
| 474 | n/a | m = memoryview(a) |
|---|
| 475 | n/a | new_a = array.array('i', range(9, -1, -1)) |
|---|
| 476 | n/a | m[:] = new_a |
|---|
| 477 | n/a | self.assertEqual(a, new_a) |
|---|
| 478 | n/a | |
|---|
| 479 | n/a | |
|---|
| 480 | n/a | class BytesMemorySliceTest(unittest.TestCase, |
|---|
| 481 | n/a | BaseMemorySliceTests, BaseBytesMemoryTests): |
|---|
| 482 | n/a | pass |
|---|
| 483 | n/a | |
|---|
| 484 | n/a | class ArrayMemorySliceTest(unittest.TestCase, |
|---|
| 485 | n/a | BaseMemorySliceTests, BaseArrayMemoryTests): |
|---|
| 486 | n/a | pass |
|---|
| 487 | n/a | |
|---|
| 488 | n/a | class BytesMemorySliceSliceTest(unittest.TestCase, |
|---|
| 489 | n/a | BaseMemorySliceSliceTests, BaseBytesMemoryTests): |
|---|
| 490 | n/a | pass |
|---|
| 491 | n/a | |
|---|
| 492 | n/a | class ArrayMemorySliceSliceTest(unittest.TestCase, |
|---|
| 493 | n/a | BaseMemorySliceSliceTests, BaseArrayMemoryTests): |
|---|
| 494 | n/a | pass |
|---|
| 495 | n/a | |
|---|
| 496 | n/a | |
|---|
| 497 | n/a | class OtherTest(unittest.TestCase): |
|---|
| 498 | n/a | def test_ctypes_cast(self): |
|---|
| 499 | n/a | # Issue 15944: Allow all source formats when casting to bytes. |
|---|
| 500 | n/a | ctypes = test.support.import_module("ctypes") |
|---|
| 501 | n/a | p6 = bytes(ctypes.c_double(0.6)) |
|---|
| 502 | n/a | |
|---|
| 503 | n/a | d = ctypes.c_double() |
|---|
| 504 | n/a | m = memoryview(d).cast("B") |
|---|
| 505 | n/a | m[:2] = p6[:2] |
|---|
| 506 | n/a | m[2:] = p6[2:] |
|---|
| 507 | n/a | self.assertEqual(d.value, 0.6) |
|---|
| 508 | n/a | |
|---|
| 509 | n/a | for format in "Bbc": |
|---|
| 510 | n/a | with self.subTest(format): |
|---|
| 511 | n/a | d = ctypes.c_double() |
|---|
| 512 | n/a | m = memoryview(d).cast(format) |
|---|
| 513 | n/a | m[:2] = memoryview(p6).cast(format)[:2] |
|---|
| 514 | n/a | m[2:] = memoryview(p6).cast(format)[2:] |
|---|
| 515 | n/a | self.assertEqual(d.value, 0.6) |
|---|
| 516 | n/a | |
|---|
| 517 | n/a | def test_memoryview_hex(self): |
|---|
| 518 | n/a | # Issue #9951: memoryview.hex() segfaults with non-contiguous buffers. |
|---|
| 519 | n/a | x = b'0' * 200000 |
|---|
| 520 | n/a | m1 = memoryview(x) |
|---|
| 521 | n/a | m2 = m1[::-1] |
|---|
| 522 | n/a | self.assertEqual(m2.hex(), '30' * 200000) |
|---|
| 523 | n/a | |
|---|
| 524 | n/a | def test_copy(self): |
|---|
| 525 | n/a | m = memoryview(b'abc') |
|---|
| 526 | n/a | with self.assertRaises(TypeError): |
|---|
| 527 | n/a | copy.copy(m) |
|---|
| 528 | n/a | |
|---|
| 529 | n/a | def test_pickle(self): |
|---|
| 530 | n/a | m = memoryview(b'abc') |
|---|
| 531 | n/a | for proto in range(pickle.HIGHEST_PROTOCOL + 1): |
|---|
| 532 | n/a | with self.assertRaises(TypeError): |
|---|
| 533 | n/a | pickle.dumps(m, proto) |
|---|
| 534 | n/a | |
|---|
| 535 | n/a | |
|---|
| 536 | n/a | if __name__ == "__main__": |
|---|
| 537 | n/a | unittest.main() |
|---|
