564 lines
19 KiB
Python
564 lines
19 KiB
Python
"""Unit tests for memory-based file-like objects.
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StringIO -- for unicode strings
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BytesIO -- for bytes
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"""
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from __future__ import unicode_literals
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from __future__ import print_function
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import unittest
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from test import test_support as support
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import io
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import _pyio as pyio
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import sys
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class MemorySeekTestMixin:
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def testInit(self):
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buf = self.buftype("1234567890")
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bytesIo = self.ioclass(buf)
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def testRead(self):
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buf = self.buftype("1234567890")
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bytesIo = self.ioclass(buf)
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self.assertEquals(buf[:1], bytesIo.read(1))
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self.assertEquals(buf[1:5], bytesIo.read(4))
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self.assertEquals(buf[5:], bytesIo.read(900))
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self.assertEquals(self.EOF, bytesIo.read())
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def testReadNoArgs(self):
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buf = self.buftype("1234567890")
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bytesIo = self.ioclass(buf)
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self.assertEquals(buf, bytesIo.read())
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self.assertEquals(self.EOF, bytesIo.read())
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def testSeek(self):
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buf = self.buftype("1234567890")
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bytesIo = self.ioclass(buf)
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bytesIo.read(5)
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bytesIo.seek(0)
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self.assertEquals(buf, bytesIo.read())
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bytesIo.seek(3)
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self.assertEquals(buf[3:], bytesIo.read())
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self.assertRaises(TypeError, bytesIo.seek, 0.0)
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def testTell(self):
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buf = self.buftype("1234567890")
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bytesIo = self.ioclass(buf)
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self.assertEquals(0, bytesIo.tell())
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bytesIo.seek(5)
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self.assertEquals(5, bytesIo.tell())
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bytesIo.seek(10000)
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self.assertEquals(10000, bytesIo.tell())
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class MemoryTestMixin:
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def test_detach(self):
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buf = self.ioclass()
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self.assertRaises(self.UnsupportedOperation, buf.detach)
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def write_ops(self, f, t):
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self.assertEqual(f.write(t("blah.")), 5)
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self.assertEqual(f.seek(0), 0)
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self.assertEqual(f.write(t("Hello.")), 6)
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self.assertEqual(f.tell(), 6)
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self.assertEqual(f.seek(5), 5)
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self.assertEqual(f.tell(), 5)
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self.assertEqual(f.write(t(" world\n\n\n")), 9)
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self.assertEqual(f.seek(0), 0)
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self.assertEqual(f.write(t("h")), 1)
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self.assertEqual(f.truncate(12), 12)
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self.assertEqual(f.tell(), 12)
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def test_write(self):
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buf = self.buftype("hello world\n")
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memio = self.ioclass(buf)
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self.write_ops(memio, self.buftype)
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self.assertEqual(memio.getvalue(), buf)
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memio = self.ioclass()
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self.write_ops(memio, self.buftype)
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self.assertEqual(memio.getvalue(), buf)
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self.assertRaises(TypeError, memio.write, None)
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memio.close()
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self.assertRaises(ValueError, memio.write, self.buftype(""))
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def test_writelines(self):
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buf = self.buftype("1234567890")
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memio = self.ioclass()
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self.assertEqual(memio.writelines([buf] * 100), None)
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self.assertEqual(memio.getvalue(), buf * 100)
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memio.writelines([])
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self.assertEqual(memio.getvalue(), buf * 100)
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memio = self.ioclass()
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self.assertRaises(TypeError, memio.writelines, [buf] + [1])
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self.assertEqual(memio.getvalue(), buf)
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self.assertRaises(TypeError, memio.writelines, None)
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memio.close()
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self.assertRaises(ValueError, memio.writelines, [])
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def test_writelines_error(self):
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memio = self.ioclass()
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def error_gen():
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yield self.buftype('spam')
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raise KeyboardInterrupt
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self.assertRaises(KeyboardInterrupt, memio.writelines, error_gen())
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def test_truncate(self):
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buf = self.buftype("1234567890")
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memio = self.ioclass(buf)
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self.assertRaises(ValueError, memio.truncate, -1)
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memio.seek(6)
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self.assertEqual(memio.truncate(), 6)
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self.assertEqual(memio.getvalue(), buf[:6])
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self.assertEqual(memio.truncate(4), 4)
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self.assertEqual(memio.getvalue(), buf[:4])
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self.assertEqual(memio.tell(), 4)
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memio.write(buf)
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self.assertEqual(memio.getvalue(), buf[:4] + buf)
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pos = memio.tell()
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self.assertEqual(memio.truncate(None), pos)
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self.assertEqual(memio.tell(), pos)
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self.assertRaises(TypeError, memio.truncate, '0')
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memio.close()
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self.assertRaises(ValueError, memio.truncate, 0)
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def test_init(self):
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buf = self.buftype("1234567890")
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memio = self.ioclass(buf)
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self.assertEqual(memio.getvalue(), buf)
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memio = self.ioclass(None)
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self.assertEqual(memio.getvalue(), self.EOF)
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memio.__init__(buf * 2)
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self.assertEqual(memio.getvalue(), buf * 2)
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memio.__init__(buf)
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self.assertEqual(memio.getvalue(), buf)
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def test_read(self):
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buf = self.buftype("1234567890")
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memio = self.ioclass(buf)
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self.assertEqual(memio.read(0), self.EOF)
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self.assertEqual(memio.read(1), buf[:1])
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self.assertEqual(memio.read(4), buf[1:5])
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self.assertEqual(memio.read(900), buf[5:])
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self.assertEqual(memio.read(), self.EOF)
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memio.seek(0)
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self.assertEqual(memio.read(), buf)
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self.assertEqual(memio.read(), self.EOF)
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self.assertEqual(memio.tell(), 10)
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memio.seek(0)
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self.assertEqual(memio.read(-1), buf)
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memio.seek(0)
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self.assertEqual(type(memio.read()), type(buf))
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memio.seek(100)
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self.assertEqual(type(memio.read()), type(buf))
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memio.seek(0)
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self.assertEqual(memio.read(None), buf)
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self.assertRaises(TypeError, memio.read, '')
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memio.close()
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self.assertRaises(ValueError, memio.read)
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def test_readline(self):
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buf = self.buftype("1234567890\n")
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memio = self.ioclass(buf * 2)
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self.assertEqual(memio.readline(0), self.EOF)
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self.assertEqual(memio.readline(), buf)
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self.assertEqual(memio.readline(), buf)
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self.assertEqual(memio.readline(), self.EOF)
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memio.seek(0)
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self.assertEqual(memio.readline(5), buf[:5])
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self.assertEqual(memio.readline(5), buf[5:10])
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self.assertEqual(memio.readline(5), buf[10:15])
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memio.seek(0)
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self.assertEqual(memio.readline(-1), buf)
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memio.seek(0)
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self.assertEqual(memio.readline(0), self.EOF)
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buf = self.buftype("1234567890\n")
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memio = self.ioclass((buf * 3)[:-1])
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self.assertEqual(memio.readline(), buf)
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self.assertEqual(memio.readline(), buf)
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self.assertEqual(memio.readline(), buf[:-1])
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self.assertEqual(memio.readline(), self.EOF)
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memio.seek(0)
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self.assertEqual(type(memio.readline()), type(buf))
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self.assertEqual(memio.readline(), buf)
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self.assertRaises(TypeError, memio.readline, '')
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memio.close()
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self.assertRaises(ValueError, memio.readline)
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def test_readlines(self):
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buf = self.buftype("1234567890\n")
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memio = self.ioclass(buf * 10)
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self.assertEqual(memio.readlines(), [buf] * 10)
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memio.seek(5)
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self.assertEqual(memio.readlines(), [buf[5:]] + [buf] * 9)
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memio.seek(0)
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self.assertEqual(memio.readlines(15), [buf] * 2)
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memio.seek(0)
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self.assertEqual(memio.readlines(-1), [buf] * 10)
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memio.seek(0)
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self.assertEqual(memio.readlines(0), [buf] * 10)
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memio.seek(0)
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self.assertEqual(type(memio.readlines()[0]), type(buf))
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memio.seek(0)
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self.assertEqual(memio.readlines(None), [buf] * 10)
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self.assertRaises(TypeError, memio.readlines, '')
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memio.close()
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self.assertRaises(ValueError, memio.readlines)
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def test_iterator(self):
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buf = self.buftype("1234567890\n")
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memio = self.ioclass(buf * 10)
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self.assertEqual(iter(memio), memio)
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self.assertTrue(hasattr(memio, '__iter__'))
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self.assertTrue(hasattr(memio, 'next'))
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i = 0
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for line in memio:
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self.assertEqual(line, buf)
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i += 1
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self.assertEqual(i, 10)
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memio.seek(0)
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i = 0
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for line in memio:
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self.assertEqual(line, buf)
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i += 1
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self.assertEqual(i, 10)
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memio = self.ioclass(buf * 2)
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memio.close()
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self.assertRaises(ValueError, next, memio)
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def test_getvalue(self):
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buf = self.buftype("1234567890")
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memio = self.ioclass(buf)
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self.assertEqual(memio.getvalue(), buf)
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memio.read()
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self.assertEqual(memio.getvalue(), buf)
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self.assertEqual(type(memio.getvalue()), type(buf))
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memio = self.ioclass(buf * 1000)
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self.assertEqual(memio.getvalue()[-3:], self.buftype("890"))
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memio = self.ioclass(buf)
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memio.close()
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self.assertRaises(ValueError, memio.getvalue)
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def test_seek(self):
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buf = self.buftype("1234567890")
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memio = self.ioclass(buf)
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memio.read(5)
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self.assertRaises(ValueError, memio.seek, -1)
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self.assertRaises(ValueError, memio.seek, 1, -1)
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self.assertRaises(ValueError, memio.seek, 1, 3)
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self.assertEqual(memio.seek(0), 0)
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self.assertEqual(memio.seek(0, 0), 0)
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self.assertEqual(memio.read(), buf)
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self.assertEqual(memio.seek(3), 3)
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self.assertEqual(memio.seek(0, 1), 3)
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self.assertEqual(memio.read(), buf[3:])
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self.assertEqual(memio.seek(len(buf)), len(buf))
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self.assertEqual(memio.read(), self.EOF)
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memio.seek(len(buf) + 1)
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self.assertEqual(memio.read(), self.EOF)
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self.assertEqual(memio.seek(0, 2), len(buf))
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self.assertEqual(memio.read(), self.EOF)
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memio.close()
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self.assertRaises(ValueError, memio.seek, 0)
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def test_overseek(self):
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buf = self.buftype("1234567890")
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memio = self.ioclass(buf)
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self.assertEqual(memio.seek(len(buf) + 1), 11)
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self.assertEqual(memio.read(), self.EOF)
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self.assertEqual(memio.tell(), 11)
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self.assertEqual(memio.getvalue(), buf)
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memio.write(self.EOF)
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self.assertEqual(memio.getvalue(), buf)
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memio.write(buf)
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self.assertEqual(memio.getvalue(), buf + self.buftype('\0') + buf)
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def test_tell(self):
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buf = self.buftype("1234567890")
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memio = self.ioclass(buf)
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self.assertEqual(memio.tell(), 0)
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memio.seek(5)
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self.assertEqual(memio.tell(), 5)
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memio.seek(10000)
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self.assertEqual(memio.tell(), 10000)
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memio.close()
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self.assertRaises(ValueError, memio.tell)
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def test_flush(self):
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buf = self.buftype("1234567890")
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memio = self.ioclass(buf)
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self.assertEqual(memio.flush(), None)
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def test_flags(self):
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memio = self.ioclass()
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self.assertEqual(memio.writable(), True)
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self.assertEqual(memio.readable(), True)
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self.assertEqual(memio.seekable(), True)
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self.assertEqual(memio.isatty(), False)
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self.assertEqual(memio.closed, False)
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memio.close()
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self.assertEqual(memio.writable(), True)
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self.assertEqual(memio.readable(), True)
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self.assertEqual(memio.seekable(), True)
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self.assertRaises(ValueError, memio.isatty)
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self.assertEqual(memio.closed, True)
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def test_subclassing(self):
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buf = self.buftype("1234567890")
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def test1():
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class MemIO(self.ioclass):
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pass
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m = MemIO(buf)
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return m.getvalue()
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def test2():
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class MemIO(self.ioclass):
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def __init__(me, a, b):
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self.ioclass.__init__(me, a)
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m = MemIO(buf, None)
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return m.getvalue()
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self.assertEqual(test1(), buf)
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self.assertEqual(test2(), buf)
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class PyBytesIOTest(MemoryTestMixin, MemorySeekTestMixin, unittest.TestCase):
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UnsupportedOperation = pyio.UnsupportedOperation
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@staticmethod
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def buftype(s):
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return s.encode("ascii")
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ioclass = pyio.BytesIO
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EOF = b""
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def test_read1(self):
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buf = self.buftype("1234567890")
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memio = self.ioclass(buf)
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self.assertRaises(TypeError, memio.read1)
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self.assertEqual(memio.read(), buf)
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def test_readinto(self):
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buf = self.buftype("1234567890")
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memio = self.ioclass(buf)
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b = bytearray(b"hello")
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self.assertEqual(memio.readinto(b), 5)
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self.assertEqual(b, b"12345")
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self.assertEqual(memio.readinto(b), 5)
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self.assertEqual(b, b"67890")
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self.assertEqual(memio.readinto(b), 0)
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self.assertEqual(b, b"67890")
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b = bytearray(b"hello world")
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memio.seek(0)
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self.assertEqual(memio.readinto(b), 10)
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self.assertEqual(b, b"1234567890d")
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b = bytearray(b"")
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memio.seek(0)
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self.assertEqual(memio.readinto(b), 0)
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self.assertEqual(b, b"")
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self.assertRaises(TypeError, memio.readinto, '')
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import array
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a = array.array(b'b', b"hello world")
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memio = self.ioclass(buf)
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memio.readinto(a)
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self.assertEqual(a.tostring(), b"1234567890d")
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memio.close()
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self.assertRaises(ValueError, memio.readinto, b)
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def test_relative_seek(self):
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buf = self.buftype("1234567890")
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memio = self.ioclass(buf)
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self.assertEqual(memio.seek(-1, 1), 0)
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self.assertEqual(memio.seek(3, 1), 3)
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self.assertEqual(memio.seek(-4, 1), 0)
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self.assertEqual(memio.seek(-1, 2), 9)
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self.assertEqual(memio.seek(1, 1), 10)
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self.assertEqual(memio.seek(1, 2), 11)
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memio.seek(-3, 2)
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self.assertEqual(memio.read(), buf[-3:])
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memio.seek(0)
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memio.seek(1, 1)
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self.assertEqual(memio.read(), buf[1:])
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def test_unicode(self):
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memio = self.ioclass()
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self.assertRaises(TypeError, self.ioclass, "1234567890")
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self.assertRaises(TypeError, memio.write, "1234567890")
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self.assertRaises(TypeError, memio.writelines, ["1234567890"])
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def test_bytes_array(self):
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buf = b"1234567890"
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import array
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a = array.array(b'b', buf)
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memio = self.ioclass(a)
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self.assertEqual(memio.getvalue(), buf)
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self.assertEqual(memio.write(a), 10)
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self.assertEqual(memio.getvalue(), buf)
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class PyStringIOTest(MemoryTestMixin, MemorySeekTestMixin, unittest.TestCase):
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buftype = unicode
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ioclass = pyio.StringIO
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UnsupportedOperation = pyio.UnsupportedOperation
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EOF = ""
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# TextIO-specific behaviour.
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def test_newlines_property(self):
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memio = self.ioclass(newline=None)
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# The C StringIO decodes newlines in write() calls, but the Python
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# implementation only does when reading. This function forces them to
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# be decoded for testing.
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def force_decode():
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memio.seek(0)
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memio.read()
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self.assertEqual(memio.newlines, None)
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memio.write("a\n")
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force_decode()
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self.assertEqual(memio.newlines, "\n")
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memio.write("b\r\n")
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force_decode()
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self.assertEqual(memio.newlines, ("\n", "\r\n"))
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memio.write("c\rd")
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force_decode()
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self.assertEqual(memio.newlines, ("\r", "\n", "\r\n"))
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def test_relative_seek(self):
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memio = self.ioclass()
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self.assertRaises(IOError, memio.seek, -1, 1)
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self.assertRaises(IOError, memio.seek, 3, 1)
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self.assertRaises(IOError, memio.seek, -3, 1)
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self.assertRaises(IOError, memio.seek, -1, 2)
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self.assertRaises(IOError, memio.seek, 1, 1)
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self.assertRaises(IOError, memio.seek, 1, 2)
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def test_textio_properties(self):
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memio = self.ioclass()
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# These are just dummy values but we nevertheless check them for fear
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# of unexpected breakage.
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self.assertIsNone(memio.encoding)
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self.assertIsNone(memio.errors)
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self.assertFalse(memio.line_buffering)
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def test_newline_none(self):
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# newline=None
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memio = self.ioclass("a\nb\r\nc\rd", newline=None)
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self.assertEqual(list(memio), ["a\n", "b\n", "c\n", "d"])
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memio.seek(0)
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self.assertEqual(memio.read(1), "a")
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|
self.assertEqual(memio.read(2), "\nb")
|
|
self.assertEqual(memio.read(2), "\nc")
|
|
self.assertEqual(memio.read(1), "\n")
|
|
memio = self.ioclass(newline=None)
|
|
self.assertEqual(2, memio.write("a\n"))
|
|
self.assertEqual(3, memio.write("b\r\n"))
|
|
self.assertEqual(3, memio.write("c\rd"))
|
|
memio.seek(0)
|
|
self.assertEqual(memio.read(), "a\nb\nc\nd")
|
|
memio = self.ioclass("a\r\nb", newline=None)
|
|
self.assertEqual(memio.read(3), "a\nb")
|
|
|
|
def test_newline_empty(self):
|
|
# newline=""
|
|
memio = self.ioclass("a\nb\r\nc\rd", newline="")
|
|
self.assertEqual(list(memio), ["a\n", "b\r\n", "c\r", "d"])
|
|
memio.seek(0)
|
|
self.assertEqual(memio.read(4), "a\nb\r")
|
|
self.assertEqual(memio.read(2), "\nc")
|
|
self.assertEqual(memio.read(1), "\r")
|
|
memio = self.ioclass(newline="")
|
|
self.assertEqual(2, memio.write("a\n"))
|
|
self.assertEqual(2, memio.write("b\r"))
|
|
self.assertEqual(2, memio.write("\nc"))
|
|
self.assertEqual(2, memio.write("\rd"))
|
|
memio.seek(0)
|
|
self.assertEqual(list(memio), ["a\n", "b\r\n", "c\r", "d"])
|
|
|
|
def test_newline_lf(self):
|
|
# newline="\n"
|
|
memio = self.ioclass("a\nb\r\nc\rd")
|
|
self.assertEqual(list(memio), ["a\n", "b\r\n", "c\rd"])
|
|
|
|
def test_newline_cr(self):
|
|
# newline="\r"
|
|
memio = self.ioclass("a\nb\r\nc\rd", newline="\r")
|
|
memio.seek(0)
|
|
self.assertEqual(memio.read(), "a\rb\r\rc\rd")
|
|
memio.seek(0)
|
|
self.assertEqual(list(memio), ["a\r", "b\r", "\r", "c\r", "d"])
|
|
|
|
def test_newline_crlf(self):
|
|
# newline="\r\n"
|
|
memio = self.ioclass("a\nb\r\nc\rd", newline="\r\n")
|
|
memio.seek(0)
|
|
self.assertEqual(memio.read(), "a\r\nb\r\r\nc\rd")
|
|
memio.seek(0)
|
|
self.assertEqual(list(memio), ["a\r\n", "b\r\r\n", "c\rd"])
|
|
|
|
def test_issue5265(self):
|
|
# StringIO can duplicate newlines in universal newlines mode
|
|
memio = self.ioclass("a\r\nb\r\n", newline=None)
|
|
self.assertEqual(memio.read(5), "a\nb\n")
|
|
|
|
|
|
class CBytesIOTest(PyBytesIOTest):
|
|
ioclass = io.BytesIO
|
|
UnsupportedOperation = io.UnsupportedOperation
|
|
|
|
test_bytes_array = unittest.skip(
|
|
"array.array() does not have the new buffer API"
|
|
)(PyBytesIOTest.test_bytes_array)
|
|
|
|
|
|
class CStringIOTest(PyStringIOTest):
|
|
ioclass = io.StringIO
|
|
UnsupportedOperation = io.UnsupportedOperation
|
|
|
|
# XXX: For the Python version of io.StringIO, this is highly
|
|
# dependent on the encoding used for the underlying buffer.
|
|
def test_widechar(self):
|
|
buf = self.buftype("\U0002030a\U00020347")
|
|
memio = self.ioclass(buf)
|
|
|
|
self.assertEqual(memio.getvalue(), buf)
|
|
self.assertEqual(memio.write(buf), len(buf))
|
|
self.assertEqual(memio.tell(), len(buf))
|
|
self.assertEqual(memio.getvalue(), buf)
|
|
self.assertEqual(memio.write(buf), len(buf))
|
|
self.assertEqual(memio.tell(), len(buf) * 2)
|
|
self.assertEqual(memio.getvalue(), buf + buf)
|
|
|
|
|
|
def test_main():
|
|
tests = [PyBytesIOTest, PyStringIOTest, CBytesIOTest, CStringIOTest]
|
|
support.run_unittest(*tests)
|
|
|
|
if __name__ == '__main__':
|
|
test_main()
|