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40348acc18
Instead of explicitly enumerate test classes for run_unittest() use the unittest ability to discover tests. This also makes these tests discoverable and runnable with unittest. load_tests() can be used for dynamic generating tests and adding doctests. setUpModule(), tearDownModule() and addModuleCleanup() can be used for running code before and after all module tests.
98 lines
2.8 KiB
Python
98 lines
2.8 KiB
Python
"""
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These tests are meant to exercise that requests to create objects bigger
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than what the address space allows are properly met with an OverflowError
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(rather than crash weirdly).
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Primarily, this means 32-bit builds with at least 2 GiB of available memory.
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You need to pass the -M option to regrtest (e.g. "-M 2.1G") for tests to
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be enabled.
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"""
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from test import support
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from test.support import bigaddrspacetest, MAX_Py_ssize_t
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import unittest
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import operator
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import sys
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class BytesTest(unittest.TestCase):
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@bigaddrspacetest
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def test_concat(self):
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# Allocate a bytestring that's near the maximum size allowed by
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# the address space, and then try to build a new, larger one through
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# concatenation.
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try:
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x = b"x" * (MAX_Py_ssize_t - 128)
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self.assertRaises(OverflowError, operator.add, x, b"x" * 128)
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finally:
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x = None
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@bigaddrspacetest
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def test_optimized_concat(self):
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try:
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x = b"x" * (MAX_Py_ssize_t - 128)
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with self.assertRaises(OverflowError) as cm:
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# this statement used a fast path in ceval.c
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x = x + b"x" * 128
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with self.assertRaises(OverflowError) as cm:
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# this statement used a fast path in ceval.c
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x += b"x" * 128
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finally:
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x = None
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@bigaddrspacetest
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def test_repeat(self):
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try:
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x = b"x" * (MAX_Py_ssize_t - 128)
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self.assertRaises(OverflowError, operator.mul, x, 128)
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finally:
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x = None
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class StrTest(unittest.TestCase):
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unicodesize = 4
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@bigaddrspacetest
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def test_concat(self):
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try:
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# Create a string that would fill almost the address space
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x = "x" * int(MAX_Py_ssize_t // (1.1 * self.unicodesize))
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# Unicode objects trigger MemoryError in case an operation that's
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# going to cause a size overflow is executed
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self.assertRaises(MemoryError, operator.add, x, x)
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finally:
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x = None
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@bigaddrspacetest
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def test_optimized_concat(self):
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try:
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x = "x" * int(MAX_Py_ssize_t // (1.1 * self.unicodesize))
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with self.assertRaises(MemoryError) as cm:
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# this statement uses a fast path in ceval.c
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x = x + x
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with self.assertRaises(MemoryError) as cm:
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# this statement uses a fast path in ceval.c
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x += x
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finally:
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x = None
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@bigaddrspacetest
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def test_repeat(self):
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try:
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x = "x" * int(MAX_Py_ssize_t // (1.1 * self.unicodesize))
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self.assertRaises(MemoryError, operator.mul, x, 2)
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finally:
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x = None
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if __name__ == '__main__':
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if len(sys.argv) > 1:
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support.set_memlimit(sys.argv[1])
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unittest.main()
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