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-rw-r--r--Lib/test/test_io.py1162
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diff --git a/Lib/test/test_io.py b/Lib/test/test_io.py
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+++ b/Lib/test/test_io.py
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+"""Unit tests for io.py."""
+from __future__ import print_function
+
+import os
+import sys
+import time
+import array
+import unittest
+from itertools import chain
+from test import test_support
+
+import codecs
+import io # The module under test
+
+
+class MockRawIO(io.RawIOBase):
+
+ def __init__(self, read_stack=()):
+ self._read_stack = list(read_stack)
+ self._write_stack = []
+
+ def read(self, n=None):
+ try:
+ return self._read_stack.pop(0)
+ except:
+ return b""
+
+ def write(self, b):
+ self._write_stack.append(b[:])
+ return len(b)
+
+ def writable(self):
+ return True
+
+ def fileno(self):
+ return 42
+
+ def readable(self):
+ return True
+
+ def seekable(self):
+ return True
+
+ def seek(self, pos, whence):
+ pass
+
+ def tell(self):
+ return 42
+
+
+class MockFileIO(io.BytesIO):
+
+ def __init__(self, data):
+ self.read_history = []
+ io.BytesIO.__init__(self, data)
+
+ def read(self, n=None):
+ res = io.BytesIO.read(self, n)
+ self.read_history.append(None if res is None else len(res))
+ return res
+
+
+class MockNonBlockWriterIO(io.RawIOBase):
+
+ def __init__(self, blocking_script):
+ self._blocking_script = list(blocking_script)
+ self._write_stack = []
+
+ def write(self, b):
+ self._write_stack.append(b[:])
+ n = self._blocking_script.pop(0)
+ if (n < 0):
+ raise io.BlockingIOError(0, "test blocking", -n)
+ else:
+ return n
+
+ def writable(self):
+ return True
+
+
+class IOTest(unittest.TestCase):
+
+ def tearDown(self):
+ test_support.unlink(test_support.TESTFN)
+
+ def write_ops(self, f):
+ self.assertEqual(f.write(b"blah."), 5)
+ self.assertEqual(f.seek(0), 0)
+ self.assertEqual(f.write(b"Hello."), 6)
+ self.assertEqual(f.tell(), 6)
+ self.assertEqual(f.seek(-1, 1), 5)
+ self.assertEqual(f.tell(), 5)
+ self.assertEqual(f.write(bytearray(b" world\n\n\n")), 9)
+ self.assertEqual(f.seek(0), 0)
+ self.assertEqual(f.write(b"h"), 1)
+ self.assertEqual(f.seek(-1, 2), 13)
+ self.assertEqual(f.tell(), 13)
+ self.assertEqual(f.truncate(12), 12)
+ self.assertEqual(f.tell(), 13)
+ self.assertRaises(TypeError, f.seek, 0.0)
+
+ def read_ops(self, f, buffered=False):
+ data = f.read(5)
+ self.assertEqual(data, b"hello")
+ data = bytearray(data)
+ self.assertEqual(f.readinto(data), 5)
+ self.assertEqual(data, b" worl")
+ self.assertEqual(f.readinto(data), 2)
+ self.assertEqual(len(data), 5)
+ self.assertEqual(data[:2], b"d\n")
+ self.assertEqual(f.seek(0), 0)
+ self.assertEqual(f.read(20), b"hello world\n")
+ self.assertEqual(f.read(1), b"")
+ self.assertEqual(f.readinto(bytearray(b"x")), 0)
+ self.assertEqual(f.seek(-6, 2), 6)
+ self.assertEqual(f.read(5), b"world")
+ self.assertEqual(f.read(0), b"")
+ self.assertEqual(f.readinto(bytearray()), 0)
+ self.assertEqual(f.seek(-6, 1), 5)
+ self.assertEqual(f.read(5), b" worl")
+ self.assertEqual(f.tell(), 10)
+ self.assertRaises(TypeError, f.seek, 0.0)
+ if buffered:
+ f.seek(0)
+ self.assertEqual(f.read(), b"hello world\n")
+ f.seek(6)
+ self.assertEqual(f.read(), b"world\n")
+ self.assertEqual(f.read(), b"")
+
+ LARGE = 2**31
+
+ def large_file_ops(self, f):
+ assert f.readable()
+ assert f.writable()
+ self.assertEqual(f.seek(self.LARGE), self.LARGE)
+ self.assertEqual(f.tell(), self.LARGE)
+ self.assertEqual(f.write(b"xxx"), 3)
+ self.assertEqual(f.tell(), self.LARGE + 3)
+ self.assertEqual(f.seek(-1, 1), self.LARGE + 2)
+ self.assertEqual(f.truncate(), self.LARGE + 2)
+ self.assertEqual(f.tell(), self.LARGE + 2)
+ self.assertEqual(f.seek(0, 2), self.LARGE + 2)
+ self.assertEqual(f.truncate(self.LARGE + 1), self.LARGE + 1)
+ self.assertEqual(f.tell(), self.LARGE + 2)
+ self.assertEqual(f.seek(0, 2), self.LARGE + 1)
+ self.assertEqual(f.seek(-1, 2), self.LARGE)
+ self.assertEqual(f.read(2), b"x")
+
+ def test_raw_file_io(self):
+ f = io.open(test_support.TESTFN, "wb", buffering=0)
+ self.assertEqual(f.readable(), False)
+ self.assertEqual(f.writable(), True)
+ self.assertEqual(f.seekable(), True)
+ self.write_ops(f)
+ f.close()
+ f = io.open(test_support.TESTFN, "rb", buffering=0)
+ self.assertEqual(f.readable(), True)
+ self.assertEqual(f.writable(), False)
+ self.assertEqual(f.seekable(), True)
+ self.read_ops(f)
+ f.close()
+
+ def test_buffered_file_io(self):
+ f = io.open(test_support.TESTFN, "wb")
+ self.assertEqual(f.readable(), False)
+ self.assertEqual(f.writable(), True)
+ self.assertEqual(f.seekable(), True)
+ self.write_ops(f)
+ f.close()
+ f = io.open(test_support.TESTFN, "rb")
+ self.assertEqual(f.readable(), True)
+ self.assertEqual(f.writable(), False)
+ self.assertEqual(f.seekable(), True)
+ self.read_ops(f, True)
+ f.close()
+
+ def test_readline(self):
+ f = io.open(test_support.TESTFN, "wb")
+ f.write(b"abc\ndef\nxyzzy\nfoo")
+ f.close()
+ f = io.open(test_support.TESTFN, "rb")
+ self.assertEqual(f.readline(), b"abc\n")
+ self.assertEqual(f.readline(10), b"def\n")
+ self.assertEqual(f.readline(2), b"xy")
+ self.assertEqual(f.readline(4), b"zzy\n")
+ self.assertEqual(f.readline(), b"foo")
+ f.close()
+
+ def test_raw_bytes_io(self):
+ f = io.BytesIO()
+ self.write_ops(f)
+ data = f.getvalue()
+ self.assertEqual(data, b"hello world\n")
+ f = io.BytesIO(data)
+ self.read_ops(f, True)
+
+ def test_large_file_ops(self):
+ # On Windows and Mac OSX this test comsumes large resources; It takes
+ # a long time to build the >2GB file and takes >2GB of disk space
+ # therefore the resource must be enabled to run this test.
+ if sys.platform[:3] == 'win' or sys.platform == 'darwin':
+ if not test_support.is_resource_enabled("largefile"):
+ print("\nTesting large file ops skipped on %s." % sys.platform,
+ file=sys.stderr)
+ print("It requires %d bytes and a long time." % self.LARGE,
+ file=sys.stderr)
+ print("Use 'regrtest.py -u largefile test_io' to run it.",
+ file=sys.stderr)
+ return
+ f = io.open(test_support.TESTFN, "w+b", 0)
+ self.large_file_ops(f)
+ f.close()
+ f = io.open(test_support.TESTFN, "w+b")
+ self.large_file_ops(f)
+ f.close()
+
+ def test_with_open(self):
+ for bufsize in (0, 1, 100):
+ f = None
+ with open(test_support.TESTFN, "wb", bufsize) as f:
+ f.write(b"xxx")
+ self.assertEqual(f.closed, True)
+ f = None
+ try:
+ with open(test_support.TESTFN, "wb", bufsize) as f:
+ 1/0
+ except ZeroDivisionError:
+ self.assertEqual(f.closed, True)
+ else:
+ self.fail("1/0 didn't raise an exception")
+
+ def test_destructor(self):
+ record = []
+ class MyFileIO(io.FileIO):
+ def __del__(self):
+ record.append(1)
+ io.FileIO.__del__(self)
+ def close(self):
+ record.append(2)
+ io.FileIO.close(self)
+ def flush(self):
+ record.append(3)
+ io.FileIO.flush(self)
+ f = MyFileIO(test_support.TESTFN, "w")
+ f.write("xxx")
+ del f
+ self.assertEqual(record, [1, 2, 3])
+
+ def test_close_flushes(self):
+ f = io.open(test_support.TESTFN, "wb")
+ f.write(b"xxx")
+ f.close()
+ f = io.open(test_support.TESTFN, "rb")
+ self.assertEqual(f.read(), b"xxx")
+ f.close()
+
+ def XXXtest_array_writes(self):
+ # XXX memory view not available yet
+ a = array.array('i', range(10))
+ n = len(memoryview(a))
+ f = io.open(test_support.TESTFN, "wb", 0)
+ self.assertEqual(f.write(a), n)
+ f.close()
+ f = io.open(test_support.TESTFN, "wb")
+ self.assertEqual(f.write(a), n)
+ f.close()
+
+ def test_closefd(self):
+ self.assertRaises(ValueError, io.open, test_support.TESTFN, 'w',
+ closefd=False)
+
+class MemorySeekTestMixin:
+
+ def testInit(self):
+ buf = self.buftype("1234567890")
+ bytesIo = self.ioclass(buf)
+
+ def testRead(self):
+ buf = self.buftype("1234567890")
+ bytesIo = self.ioclass(buf)
+
+ self.assertEquals(buf[:1], bytesIo.read(1))
+ self.assertEquals(buf[1:5], bytesIo.read(4))
+ self.assertEquals(buf[5:], bytesIo.read(900))
+ self.assertEquals(self.EOF, bytesIo.read())
+
+ def testReadNoArgs(self):
+ buf = self.buftype("1234567890")
+ bytesIo = self.ioclass(buf)
+
+ self.assertEquals(buf, bytesIo.read())
+ self.assertEquals(self.EOF, bytesIo.read())
+
+ def testSeek(self):
+ buf = self.buftype("1234567890")
+ bytesIo = self.ioclass(buf)
+
+ bytesIo.read(5)
+ bytesIo.seek(0)
+ self.assertEquals(buf, bytesIo.read())
+
+ bytesIo.seek(3)
+ self.assertEquals(buf[3:], bytesIo.read())
+ self.assertRaises(TypeError, bytesIo.seek, 0.0)
+
+ def testTell(self):
+ buf = self.buftype("1234567890")
+ bytesIo = self.ioclass(buf)
+
+ self.assertEquals(0, bytesIo.tell())
+ bytesIo.seek(5)
+ self.assertEquals(5, bytesIo.tell())
+ bytesIo.seek(10000)
+ self.assertEquals(10000, bytesIo.tell())
+
+
+class BytesIOTest(MemorySeekTestMixin, unittest.TestCase):
+ @staticmethod
+ def buftype(s):
+ return s.encode("utf-8")
+ ioclass = io.BytesIO
+ EOF = b""
+
+
+class StringIOTest(MemorySeekTestMixin, unittest.TestCase):
+ buftype = str
+ ioclass = io.StringIO
+ EOF = ""
+
+
+class BufferedReaderTest(unittest.TestCase):
+
+ def testRead(self):
+ rawio = MockRawIO((b"abc", b"d", b"efg"))
+ bufio = io.BufferedReader(rawio)
+
+ self.assertEquals(b"abcdef", bufio.read(6))
+
+ def testBuffering(self):
+ data = b"abcdefghi"
+ dlen = len(data)
+
+ tests = [
+ [ 100, [ 3, 1, 4, 8 ], [ dlen, 0 ] ],
+ [ 100, [ 3, 3, 3], [ dlen ] ],
+ [ 4, [ 1, 2, 4, 2 ], [ 4, 4, 1 ] ],
+ ]
+
+ for bufsize, buf_read_sizes, raw_read_sizes in tests:
+ rawio = MockFileIO(data)
+ bufio = io.BufferedReader(rawio, buffer_size=bufsize)
+ pos = 0
+ for nbytes in buf_read_sizes:
+ self.assertEquals(bufio.read(nbytes), data[pos:pos+nbytes])
+ pos += nbytes
+ self.assertEquals(rawio.read_history, raw_read_sizes)
+
+ def testReadNonBlocking(self):
+ # Inject some None's in there to simulate EWOULDBLOCK
+ rawio = MockRawIO((b"abc", b"d", None, b"efg", None, None))
+ bufio = io.BufferedReader(rawio)
+
+ self.assertEquals(b"abcd", bufio.read(6))
+ self.assertEquals(b"e", bufio.read(1))
+ self.assertEquals(b"fg", bufio.read())
+ self.assert_(None is bufio.read())
+ self.assertEquals(b"", bufio.read())
+
+ def testReadToEof(self):
+ rawio = MockRawIO((b"abc", b"d", b"efg"))
+ bufio = io.BufferedReader(rawio)
+
+ self.assertEquals(b"abcdefg", bufio.read(9000))
+
+ def testReadNoArgs(self):
+ rawio = MockRawIO((b"abc", b"d", b"efg"))
+ bufio = io.BufferedReader(rawio)
+
+ self.assertEquals(b"abcdefg", bufio.read())
+
+ def testFileno(self):
+ rawio = MockRawIO((b"abc", b"d", b"efg"))
+ bufio = io.BufferedReader(rawio)
+
+ self.assertEquals(42, bufio.fileno())
+
+ def testFilenoNoFileno(self):
+ # XXX will we always have fileno() function? If so, kill
+ # this test. Else, write it.
+ pass
+
+
+class BufferedWriterTest(unittest.TestCase):
+
+ def testWrite(self):
+ # Write to the buffered IO but don't overflow the buffer.
+ writer = MockRawIO()
+ bufio = io.BufferedWriter(writer, 8)
+
+ bufio.write(b"abc")
+
+ self.assertFalse(writer._write_stack)
+
+ def testWriteOverflow(self):
+ writer = MockRawIO()
+ bufio = io.BufferedWriter(writer, 8)
+
+ bufio.write(b"abc")
+ bufio.write(b"defghijkl")
+
+ self.assertEquals(b"abcdefghijkl", writer._write_stack[0])
+
+ def testWriteNonBlocking(self):
+ raw = MockNonBlockWriterIO((9, 2, 22, -6, 10, 12, 12))
+ bufio = io.BufferedWriter(raw, 8, 16)
+
+ bufio.write(b"asdf")
+ bufio.write(b"asdfa")
+ self.assertEquals(b"asdfasdfa", raw._write_stack[0])
+
+ bufio.write(b"asdfasdfasdf")
+ self.assertEquals(b"asdfasdfasdf", raw._write_stack[1])
+ bufio.write(b"asdfasdfasdf")
+ self.assertEquals(b"dfasdfasdf", raw._write_stack[2])
+ self.assertEquals(b"asdfasdfasdf", raw._write_stack[3])
+
+ bufio.write(b"asdfasdfasdf")
+
+ # XXX I don't like this test. It relies too heavily on how the
+ # algorithm actually works, which we might change. Refactor
+ # later.
+
+ def testFileno(self):
+ rawio = MockRawIO((b"abc", b"d", b"efg"))
+ bufio = io.BufferedWriter(rawio)
+
+ self.assertEquals(42, bufio.fileno())
+
+ def testFlush(self):
+ writer = MockRawIO()
+ bufio = io.BufferedWriter(writer, 8)
+
+ bufio.write(b"abc")
+ bufio.flush()
+
+ self.assertEquals(b"abc", writer._write_stack[0])
+
+
+class BufferedRWPairTest(unittest.TestCase):
+
+ def testRWPair(self):
+ r = MockRawIO(())
+ w = MockRawIO()
+ pair = io.BufferedRWPair(r, w)
+
+ # XXX need implementation
+
+
+class BufferedRandomTest(unittest.TestCase):
+
+ def testReadAndWrite(self):
+ raw = MockRawIO((b"asdf", b"ghjk"))
+ rw = io.BufferedRandom(raw, 8, 12)
+
+ self.assertEqual(b"as", rw.read(2))
+ rw.write(b"ddd")
+ rw.write(b"eee")
+ self.assertFalse(raw._write_stack) # Buffer writes
+ self.assertEqual(b"ghjk", rw.read()) # This read forces write flush
+ self.assertEquals(b"dddeee", raw._write_stack[0])
+
+ def testSeekAndTell(self):
+ raw = io.BytesIO(b"asdfghjkl")
+ rw = io.BufferedRandom(raw)
+
+ self.assertEquals(b"as", rw.read(2))
+ self.assertEquals(2, rw.tell())
+ rw.seek(0, 0)
+ self.assertEquals(b"asdf", rw.read(4))
+
+ rw.write(b"asdf")
+ rw.seek(0, 0)
+ self.assertEquals(b"asdfasdfl", rw.read())
+ self.assertEquals(9, rw.tell())
+ rw.seek(-4, 2)
+ self.assertEquals(5, rw.tell())
+ rw.seek(2, 1)
+ self.assertEquals(7, rw.tell())
+ self.assertEquals(b"fl", rw.read(11))
+ self.assertRaises(TypeError, rw.seek, 0.0)
+
+# To fully exercise seek/tell, the StatefulIncrementalDecoder has these
+# properties:
+# - A single output character can correspond to many bytes of input.
+# - The number of input bytes to complete the character can be
+# undetermined until the last input byte is received.
+# - The number of input bytes can vary depending on previous input.
+# - A single input byte can correspond to many characters of output.
+# - The number of output characters can be undetermined until the
+# last input byte is received.
+# - The number of output characters can vary depending on previous input.
+
+class StatefulIncrementalDecoder(codecs.IncrementalDecoder):
+ """
+ For testing seek/tell behavior with a stateful, buffering decoder.
+
+ Input is a sequence of words. Words may be fixed-length (length set
+ by input) or variable-length (period-terminated). In variable-length
+ mode, extra periods are ignored. Possible words are:
+ - 'i' followed by a number sets the input length, I (maximum 99).
+ When I is set to 0, words are space-terminated.
+ - 'o' followed by a number sets the output length, O (maximum 99).
+ - Any other word is converted into a word followed by a period on
+ the output. The output word consists of the input word truncated
+ or padded out with hyphens to make its length equal to O. If O
+ is 0, the word is output verbatim without truncating or padding.
+ I and O are initially set to 1. When I changes, any buffered input is
+ re-scanned according to the new I. EOF also terminates the last word.
+ """
+
+ def __init__(self, errors='strict'):
+ codecs.IncrementalDecoder.__init__(self, errors)
+ self.reset()
+
+ def __repr__(self):
+ return '<SID %x>' % id(self)
+
+ def reset(self):
+ self.i = 1
+ self.o = 1
+ self.buffer = bytearray()
+
+ def getstate(self):
+ i, o = self.i ^ 1, self.o ^ 1 # so that flags = 0 after reset()
+ return bytes(self.buffer), i*100 + o
+
+ def setstate(self, state):
+ buffer, io = state
+ self.buffer = bytearray(buffer)
+ i, o = divmod(io, 100)
+ self.i, self.o = i ^ 1, o ^ 1
+
+ def decode(self, input, final=False):
+ output = ''
+ for b in input:
+ if self.i == 0: # variable-length, terminated with period
+ if b == ord('.'):
+ if self.buffer:
+ output += self.process_word()
+ else:
+ self.buffer.append(b)
+ else: # fixed-length, terminate after self.i bytes
+ self.buffer.append(b)
+ if len(self.buffer) == self.i:
+ output += self.process_word()
+ if final and self.buffer: # EOF terminates the last word
+ output += self.process_word()
+ return output
+
+ def process_word(self):
+ output = ''
+ if self.buffer[0] == ord('i'):
+ self.i = min(99, int(self.buffer[1:] or 0)) # set input length
+ elif self.buffer[0] == ord('o'):
+ self.o = min(99, int(self.buffer[1:] or 0)) # set output length
+ else:
+ output = self.buffer.decode('ascii')
+ if len(output) < self.o:
+ output += '-'*self.o # pad out with hyphens
+ if self.o:
+ output = output[:self.o] # truncate to output length
+ output += '.'
+ self.buffer = bytearray()
+ return output
+
+class StatefulIncrementalDecoderTest(unittest.TestCase):
+ """
+ Make sure the StatefulIncrementalDecoder actually works.
+ """
+
+ test_cases = [
+ # I=1, O=1 (fixed-length input == fixed-length output)
+ (b'abcd', False, 'a.b.c.d.'),
+ # I=0, O=0 (variable-length input, variable-length output)
+ (b'oiabcd', True, 'abcd.'),
+ # I=0, O=0 (should ignore extra periods)
+ (b'oi...abcd...', True, 'abcd.'),
+ # I=0, O=6 (variable-length input, fixed-length output)
+ (b'i.o6.x.xyz.toolongtofit.', False, 'x-----.xyz---.toolon.'),
+ # I=2, O=6 (fixed-length input < fixed-length output)
+ (b'i.i2.o6xyz', True, 'xy----.z-----.'),
+ # I=6, O=3 (fixed-length input > fixed-length output)
+ (b'i.o3.i6.abcdefghijklmnop', True, 'abc.ghi.mno.'),
+ # I=0, then 3; O=29, then 15 (with longer output)
+ (b'i.o29.a.b.cde.o15.abcdefghijabcdefghij.i3.a.b.c.d.ei00k.l.m', True,
+ 'a----------------------------.' +
+ 'b----------------------------.' +
+ 'cde--------------------------.' +
+ 'abcdefghijabcde.' +
+ 'a.b------------.' +
+ '.c.------------.' +
+ 'd.e------------.' +
+ 'k--------------.' +
+ 'l--------------.' +
+ 'm--------------.')
+ ]
+
+ def testDecoder(self):
+ # Try a few one-shot test cases.
+ for input, eof, output in self.test_cases:
+ d = StatefulIncrementalDecoder()
+ self.assertEquals(d.decode(input, eof), output)
+
+ # Also test an unfinished decode, followed by forcing EOF.
+ d = StatefulIncrementalDecoder()
+ self.assertEquals(d.decode(b'oiabcd'), '')
+ self.assertEquals(d.decode(b'', 1), 'abcd.')
+
+class TextIOWrapperTest(unittest.TestCase):
+
+ def setUp(self):
+ self.testdata = b"AAA\r\nBBB\rCCC\r\nDDD\nEEE\r\n"
+ self.normalized = b"AAA\nBBB\nCCC\nDDD\nEEE\n".decode("ascii")
+
+ def tearDown(self):
+ test_support.unlink(test_support.TESTFN)
+
+ def testLineBuffering(self):
+ r = io.BytesIO()
+ b = io.BufferedWriter(r, 1000)
+ t = io.TextIOWrapper(b, newline="\n", line_buffering=True)
+ t.write(u"X")
+ self.assertEquals(r.getvalue(), b"") # No flush happened
+ t.write(u"Y\nZ")
+ self.assertEquals(r.getvalue(), b"XY\nZ") # All got flushed
+ t.write(u"A\rB")
+ self.assertEquals(r.getvalue(), b"XY\nZA\rB")
+
+ def testEncodingErrorsReading(self):
+ # (1) default
+ b = io.BytesIO(b"abc\n\xff\n")
+ t = io.TextIOWrapper(b, encoding="ascii")
+ self.assertRaises(UnicodeError, t.read)
+ # (2) explicit strict
+ b = io.BytesIO(b"abc\n\xff\n")
+ t = io.TextIOWrapper(b, encoding="ascii", errors="strict")
+ self.assertRaises(UnicodeError, t.read)
+ # (3) ignore
+ b = io.BytesIO(b"abc\n\xff\n")
+ t = io.TextIOWrapper(b, encoding="ascii", errors="ignore")
+ self.assertEquals(t.read(), "abc\n\n")
+ # (4) replace
+ b = io.BytesIO(b"abc\n\xff\n")
+ t = io.TextIOWrapper(b, encoding="ascii", errors="replace")
+ self.assertEquals(t.read(), u"abc\n\ufffd\n")
+
+ def testEncodingErrorsWriting(self):
+ # (1) default
+ b = io.BytesIO()
+ t = io.TextIOWrapper(b, encoding="ascii")
+ self.assertRaises(UnicodeError, t.write, u"\xff")
+ # (2) explicit strict
+ b = io.BytesIO()
+ t = io.TextIOWrapper(b, encoding="ascii", errors="strict")
+ self.assertRaises(UnicodeError, t.write, u"\xff")
+ # (3) ignore
+ b = io.BytesIO()
+ t = io.TextIOWrapper(b, encoding="ascii", errors="ignore",
+ newline="\n")
+ t.write(u"abc\xffdef\n")
+ t.flush()
+ self.assertEquals(b.getvalue(), b"abcdef\n")
+ # (4) replace
+ b = io.BytesIO()
+ t = io.TextIOWrapper(b, encoding="ascii", errors="replace",
+ newline="\n")
+ t.write(u"abc\xffdef\n")
+ t.flush()
+ self.assertEquals(b.getvalue(), b"abc?def\n")
+
+ def testNewlinesInput(self):
+ testdata = b"AAA\nBBB\nCCC\rDDD\rEEE\r\nFFF\r\nGGG"
+ normalized = testdata.replace(b"\r\n", b"\n").replace(b"\r", b"\n")
+ for newline, expected in [
+ (None, normalized.decode("ascii").splitlines(True)),
+ ("", testdata.decode("ascii").splitlines(True)),
+ ("\n", ["AAA\n", "BBB\n", "CCC\rDDD\rEEE\r\n", "FFF\r\n", "GGG"]),
+ ("\r\n", ["AAA\nBBB\nCCC\rDDD\rEEE\r\n", "FFF\r\n", "GGG"]),
+ ("\r", ["AAA\nBBB\nCCC\r", "DDD\r", "EEE\r", "\nFFF\r", "\nGGG"]),
+ ]:
+ buf = io.BytesIO(testdata)
+ txt = io.TextIOWrapper(buf, encoding="ascii", newline=newline)
+ self.assertEquals(txt.readlines(), expected)
+ txt.seek(0)
+ self.assertEquals(txt.read(), "".join(expected))
+
+ def testNewlinesOutput(self):
+ testdict = {
+ "": b"AAA\nBBB\nCCC\nX\rY\r\nZ",
+ "\n": b"AAA\nBBB\nCCC\nX\rY\r\nZ",
+ "\r": b"AAA\rBBB\rCCC\rX\rY\r\rZ",
+ "\r\n": b"AAA\r\nBBB\r\nCCC\r\nX\rY\r\r\nZ",
+ }
+ tests = [(None, testdict[os.linesep])] + sorted(testdict.items())
+ for newline, expected in tests:
+ buf = io.BytesIO()
+ txt = io.TextIOWrapper(buf, encoding="ascii", newline=newline)
+ txt.write("AAA\nB")
+ txt.write("BB\nCCC\n")
+ txt.write("X\rY\r\nZ")
+ txt.flush()
+ self.assertEquals(buf.getvalue(), expected)
+
+ def testNewlines(self):
+ input_lines = [ "unix\n", "windows\r\n", "os9\r", "last\n", "nonl" ]
+
+ tests = [
+ [ None, [ 'unix\n', 'windows\n', 'os9\n', 'last\n', 'nonl' ] ],
+ [ '', input_lines ],
+ [ '\n', [ "unix\n", "windows\r\n", "os9\rlast\n", "nonl" ] ],
+ [ '\r\n', [ "unix\nwindows\r\n", "os9\rlast\nnonl" ] ],
+ [ '\r', [ "unix\nwindows\r", "\nos9\r", "last\nnonl" ] ],
+ ]
+
+ encodings = ('utf-8', 'latin-1')
+
+ # Try a range of buffer sizes to test the case where \r is the last
+ # character in TextIOWrapper._pending_line.
+ for encoding in encodings:
+ # XXX: str.encode() should return bytes
+ data = bytes(''.join(input_lines).encode(encoding))
+ for do_reads in (False, True):
+ for bufsize in range(1, 10):
+ for newline, exp_lines in tests:
+ bufio = io.BufferedReader(io.BytesIO(data), bufsize)
+ textio = io.TextIOWrapper(bufio, newline=newline,
+ encoding=encoding)
+ if do_reads:
+ got_lines = []
+ while True:
+ c2 = textio.read(2)
+ if c2 == '':
+ break
+ self.assertEquals(len(c2), 2)
+ got_lines.append(c2 + textio.readline())
+ else:
+ got_lines = list(textio)
+
+ for got_line, exp_line in zip(got_lines, exp_lines):
+ self.assertEquals(got_line, exp_line)
+ self.assertEquals(len(got_lines), len(exp_lines))
+
+ def testNewlinesInput(self):
+ testdata = b"AAA\nBBB\nCCC\rDDD\rEEE\r\nFFF\r\nGGG"
+ normalized = testdata.replace(b"\r\n", b"\n").replace(b"\r", b"\n")
+ for newline, expected in [
+ (None, normalized.decode("ascii").splitlines(True)),
+ ("", testdata.decode("ascii").splitlines(True)),
+ ("\n", ["AAA\n", "BBB\n", "CCC\rDDD\rEEE\r\n", "FFF\r\n", "GGG"]),
+ ("\r\n", ["AAA\nBBB\nCCC\rDDD\rEEE\r\n", "FFF\r\n", "GGG"]),
+ ("\r", ["AAA\nBBB\nCCC\r", "DDD\r", "EEE\r", "\nFFF\r", "\nGGG"]),
+ ]:
+ buf = io.BytesIO(testdata)
+ txt = io.TextIOWrapper(buf, encoding="ascii", newline=newline)
+ self.assertEquals(txt.readlines(), expected)
+ txt.seek(0)
+ self.assertEquals(txt.read(), "".join(expected))
+
+ def testNewlinesOutput(self):
+ data = u"AAA\nBBB\rCCC\n"
+ data_lf = b"AAA\nBBB\rCCC\n"
+ data_cr = b"AAA\rBBB\rCCC\r"
+ data_crlf = b"AAA\r\nBBB\rCCC\r\n"
+ save_linesep = os.linesep
+ try:
+ for os.linesep, newline, expected in [
+ ("\n", None, data_lf),
+ ("\r\n", None, data_crlf),
+ ("\n", "", data_lf),
+ ("\r\n", "", data_lf),
+ ("\n", "\n", data_lf),
+ ("\r\n", "\n", data_lf),
+ ("\n", "\r", data_cr),
+ ("\r\n", "\r", data_cr),
+ ("\n", "\r\n", data_crlf),
+ ("\r\n", "\r\n", data_crlf),
+ ]:
+ buf = io.BytesIO()
+ txt = io.TextIOWrapper(buf, encoding="ascii", newline=newline)
+ txt.write(data)
+ txt.close()
+ self.assertEquals(buf.getvalue(), expected)
+ finally:
+ os.linesep = save_linesep
+
+ # Systematic tests of the text I/O API
+
+ def testBasicIO(self):
+ for chunksize in (1, 2, 3, 4, 5, 15, 16, 17, 31, 32, 33, 63, 64, 65):
+ for enc in "ascii", "latin1", "utf8" :# , "utf-16-be", "utf-16-le":
+ f = io.open(test_support.TESTFN, "w+", encoding=enc)
+ f._CHUNK_SIZE = chunksize
+ self.assertEquals(f.write(u"abc"), 3)
+ f.close()
+ f = io.open(test_support.TESTFN, "r+", encoding=enc)
+ f._CHUNK_SIZE = chunksize
+ self.assertEquals(f.tell(), 0)
+ self.assertEquals(f.read(), u"abc")
+ cookie = f.tell()
+ self.assertEquals(f.seek(0), 0)
+ self.assertEquals(f.read(2), u"ab")
+ self.assertEquals(f.read(1), u"c")
+ self.assertEquals(f.read(1), u"")
+ self.assertEquals(f.read(), u"")
+ self.assertEquals(f.tell(), cookie)
+ self.assertEquals(f.seek(0), 0)
+ self.assertEquals(f.seek(0, 2), cookie)
+ self.assertEquals(f.write(u"def"), 3)
+ self.assertEquals(f.seek(cookie), cookie)
+ self.assertEquals(f.read(), u"def")
+ if enc.startswith("utf"):
+ self.multi_line_test(f, enc)
+ f.close()
+
+ def multi_line_test(self, f, enc):
+ f.seek(0)
+ f.truncate()
+ sample = u"s\xff\u0fff\uffff"
+ wlines = []
+ for size in (0, 1, 2, 3, 4, 5, 30, 31, 32, 33, 62, 63, 64, 65, 1000):
+ chars = []
+ for i in range(size):
+ chars.append(sample[i % len(sample)])
+ line = u"".join(chars) + u"\n"
+ wlines.append((f.tell(), line))
+ f.write(line)
+ f.seek(0)
+ rlines = []
+ while True:
+ pos = f.tell()
+ line = f.readline()
+ if not line:
+ break
+ rlines.append((pos, line))
+ self.assertEquals(rlines, wlines)
+
+ def testTelling(self):
+ f = io.open(test_support.TESTFN, "w+", encoding="utf8")
+ p0 = f.tell()
+ f.write(u"\xff\n")
+ p1 = f.tell()
+ f.write(u"\xff\n")
+ p2 = f.tell()
+ f.seek(0)
+ self.assertEquals(f.tell(), p0)
+ self.assertEquals(f.readline(), u"\xff\n")
+ self.assertEquals(f.tell(), p1)
+ self.assertEquals(f.readline(), u"\xff\n")
+ self.assertEquals(f.tell(), p2)
+ f.seek(0)
+ for line in f:
+ self.assertEquals(line, u"\xff\n")
+ self.assertRaises(IOError, f.tell)
+ self.assertEquals(f.tell(), p2)
+ f.close()
+
+ def testSeeking(self):
+ chunk_size = io.TextIOWrapper._CHUNK_SIZE
+ prefix_size = chunk_size - 2
+ u_prefix = "a" * prefix_size
+ prefix = bytes(u_prefix.encode("utf-8"))
+ self.assertEquals(len(u_prefix), len(prefix))
+ u_suffix = "\u8888\n"
+ suffix = bytes(u_suffix.encode("utf-8"))
+ line = prefix + suffix
+ f = io.open(test_support.TESTFN, "wb")
+ f.write(line*2)
+ f.close()
+ f = io.open(test_support.TESTFN, "r", encoding="utf-8")
+ s = f.read(prefix_size)
+ self.assertEquals(s, unicode(prefix, "ascii"))
+ self.assertEquals(f.tell(), prefix_size)
+ self.assertEquals(f.readline(), u_suffix)
+
+ def testSeekingToo(self):
+ # Regression test for a specific bug
+ data = b'\xe0\xbf\xbf\n'
+ f = io.open(test_support.TESTFN, "wb")
+ f.write(data)
+ f.close()
+ f = io.open(test_support.TESTFN, "r", encoding="utf-8")
+ f._CHUNK_SIZE # Just test that it exists
+ f._CHUNK_SIZE = 2
+ f.readline()
+ f.tell()
+
+ # FIXME: figure out why the test fails with Python 2.6
+ def XXXtestSeekAndTell(self):
+ """Test seek/tell using the StatefulIncrementalDecoder."""
+
+ def lookupTestDecoder(name):
+ if self.codecEnabled and name == 'test_decoder':
+ return codecs.CodecInfo(
+ name='test_decoder', encode=None, decode=None,
+ incrementalencoder=None,
+ streamreader=None, streamwriter=None,
+ incrementaldecoder=StatefulIncrementalDecoder)
+
+ def testSeekAndTellWithData(data, min_pos=0):
+ """Tell/seek to various points within a data stream and ensure
+ that the decoded data returned by read() is consistent."""
+ f = io.open(test_support.TESTFN, 'wb')
+ f.write(data)
+ f.close()
+ f = io.open(test_support.TESTFN, encoding='test_decoder')
+ decoded = f.read()
+ f.close()
+
+ for i in range(min_pos, len(decoded) + 1): # seek positions
+ for j in [1, 5, len(decoded) - i]: # read lengths
+ f = io.open(test_support.TESTFN, encoding='test_decoder')
+ self.assertEquals(f.read(i), decoded[:i])
+ cookie = f.tell()
+ self.assertEquals(f.read(j), decoded[i:i + j])
+ f.seek(cookie)
+ self.assertEquals(f.read(), decoded[i:])
+ f.close()
+
+ # Register a special incremental decoder for testing.
+ codecs.register(lookupTestDecoder)
+ self.codecEnabled = 1
+
+ # Run the tests.
+ try:
+ # Try each test case.
+ for input, _, _ in StatefulIncrementalDecoderTest.test_cases:
+ testSeekAndTellWithData(input)
+
+ # Position each test case so that it crosses a chunk boundary.
+ CHUNK_SIZE = io.TextIOWrapper._CHUNK_SIZE
+ for input, _, _ in StatefulIncrementalDecoderTest.test_cases:
+ offset = CHUNK_SIZE - len(input)//2
+ prefix = b'.'*offset
+ # Don't bother seeking into the prefix (takes too long).
+ min_pos = offset*2
+ testSeekAndTellWithData(prefix + input, min_pos)
+
+ # Ensure our test decoder won't interfere with subsequent tests.
+ finally:
+ self.codecEnabled = 0
+
+ def testEncodedWrites(self):
+ data = u"1234567890"
+ tests = ("utf-16",
+ "utf-16-le",
+ "utf-16-be",
+ "utf-32",
+ "utf-32-le",
+ "utf-32-be")
+ for encoding in tests:
+ buf = io.BytesIO()
+ f = io.TextIOWrapper(buf, encoding=encoding)
+ # Check if the BOM is written only once (see issue1753).
+ f.write(data)
+ f.write(data)
+ f.seek(0)
+ self.assertEquals(f.read(), data * 2)
+ self.assertEquals(buf.getvalue(), (data * 2).encode(encoding))
+
+ def timingTest(self):
+ timer = time.time
+ enc = "utf8"
+ line = "\0\x0f\xff\u0fff\uffff\U000fffff\U0010ffff"*3 + "\n"
+ nlines = 10000
+ nchars = len(line)
+ nbytes = len(line.encode(enc))
+ for chunk_size in (32, 64, 128, 256):
+ f = io.open(test_support.TESTFN, "w+", encoding=enc)
+ f._CHUNK_SIZE = chunk_size
+ t0 = timer()
+ for i in range(nlines):
+ f.write(line)
+ f.flush()
+ t1 = timer()
+ f.seek(0)
+ for line in f:
+ pass
+ t2 = timer()
+ f.seek(0)
+ while f.readline():
+ pass
+ t3 = timer()
+ f.seek(0)
+ while f.readline():
+ f.tell()
+ t4 = timer()
+ f.close()
+ if test_support.verbose:
+ print("\nTiming test: %d lines of %d characters (%d bytes)" %
+ (nlines, nchars, nbytes))
+ print("File chunk size: %6s" % f._CHUNK_SIZE)
+ print("Writing: %6.3f seconds" % (t1-t0))
+ print("Reading using iteration: %6.3f seconds" % (t2-t1))
+ print("Reading using readline(): %6.3f seconds" % (t3-t2))
+ print("Using readline()+tell(): %6.3f seconds" % (t4-t3))
+
+ def testReadOneByOne(self):
+ txt = io.TextIOWrapper(io.BytesIO(b"AA\r\nBB"))
+ reads = ""
+ while True:
+ c = txt.read(1)
+ if not c:
+ break
+ reads += c
+ self.assertEquals(reads, "AA\nBB")
+
+ # read in amounts equal to TextIOWrapper._CHUNK_SIZE which is 128.
+ def testReadByChunk(self):
+ # make sure "\r\n" straddles 128 char boundary.
+ txt = io.TextIOWrapper(io.BytesIO(b"A" * 127 + b"\r\nB"))
+ reads = ""
+ while True:
+ c = txt.read(128)
+ if not c:
+ break
+ reads += c
+ self.assertEquals(reads, "A"*127+"\nB")
+
+ def test_issue1395_1(self):
+ txt = io.TextIOWrapper(io.BytesIO(self.testdata), encoding="ascii")
+
+ # read one char at a time
+ reads = ""
+ while True:
+ c = txt.read(1)
+ if not c:
+ break
+ reads += c
+ self.assertEquals(reads, self.normalized)
+
+ def test_issue1395_2(self):
+ txt = io.TextIOWrapper(io.BytesIO(self.testdata), encoding="ascii")
+ txt._CHUNK_SIZE = 4
+
+ reads = ""
+ while True:
+ c = txt.read(4)
+ if not c:
+ break
+ reads += c
+ self.assertEquals(reads, self.normalized)
+
+ def test_issue1395_3(self):
+ txt = io.TextIOWrapper(io.BytesIO(self.testdata), encoding="ascii")
+ txt._CHUNK_SIZE = 4
+
+ reads = txt.read(4)
+ reads += txt.read(4)
+ reads += txt.readline()
+ reads += txt.readline()
+ reads += txt.readline()
+ self.assertEquals(reads, self.normalized)
+
+ def test_issue1395_4(self):
+ txt = io.TextIOWrapper(io.BytesIO(self.testdata), encoding="ascii")
+ txt._CHUNK_SIZE = 4
+
+ reads = txt.read(4)
+ reads += txt.read()
+ self.assertEquals(reads, self.normalized)
+
+ def test_issue1395_5(self):
+ txt = io.TextIOWrapper(io.BytesIO(self.testdata), encoding="ascii")
+ txt._CHUNK_SIZE = 4
+
+ reads = txt.read(4)
+ pos = txt.tell()
+ txt.seek(0)
+ txt.seek(pos)
+ self.assertEquals(txt.read(4), "BBB\n")
+
+ def test_issue2282(self):
+ buffer = io.BytesIO(self.testdata)
+ txt = io.TextIOWrapper(buffer, encoding="ascii")
+
+ self.assertEqual(buffer.seekable(), txt.seekable())
+
+ def test_newline_decoder(self):
+ import codecs
+ decoder = codecs.getincrementaldecoder("utf-8")()
+ decoder = io.IncrementalNewlineDecoder(decoder, translate=True)
+
+ self.assertEquals(decoder.decode(b'\xe8\xa2\x88'), u"\u8888")
+
+ self.assertEquals(decoder.decode(b'\xe8'), u"")
+ self.assertEquals(decoder.decode(b'\xa2'), u"")
+ self.assertEquals(decoder.decode(b'\x88'), u"\u8888")
+
+ self.assertEquals(decoder.decode(b'\xe8'), u"")
+ self.assertRaises(UnicodeDecodeError, decoder.decode, b'', final=True)
+
+ decoder.setstate((b'', 0))
+ self.assertEquals(decoder.decode(b'\n'), u"\n")
+ self.assertEquals(decoder.decode(b'\r'), u"")
+ self.assertEquals(decoder.decode(b'', final=True), u"\n")
+ self.assertEquals(decoder.decode(b'\r', final=True), u"\n")
+
+ self.assertEquals(decoder.decode(b'\r'), u"")
+ self.assertEquals(decoder.decode(b'a'), u"\na")
+
+ self.assertEquals(decoder.decode(b'\r\r\n'), u"\n\n")
+ self.assertEquals(decoder.decode(b'\r'), u"")
+ self.assertEquals(decoder.decode(b'\r'), u"\n")
+ self.assertEquals(decoder.decode(b'\na'), u"\na")
+
+ self.assertEquals(decoder.decode(b'\xe8\xa2\x88\r\n'), u"\u8888\n")
+ self.assertEquals(decoder.decode(b'\xe8\xa2\x88'), u"\u8888")
+ self.assertEquals(decoder.decode(b'\n'), u"\n")
+ self.assertEquals(decoder.decode(b'\xe8\xa2\x88\r'), u"\u8888")
+ self.assertEquals(decoder.decode(b'\n'), u"\n")
+
+ decoder = codecs.getincrementaldecoder("utf-8")()
+ decoder = io.IncrementalNewlineDecoder(decoder, translate=True)
+ self.assertEquals(decoder.newlines, None)
+ decoder.decode(b"abc\n\r")
+ self.assertEquals(decoder.newlines, u'\n')
+ decoder.decode(b"\nabc")
+ self.assertEquals(decoder.newlines, ('\n', '\r\n'))
+ decoder.decode(b"abc\r")
+ self.assertEquals(decoder.newlines, ('\n', '\r\n'))
+ decoder.decode(b"abc")
+ self.assertEquals(decoder.newlines, ('\r', '\n', '\r\n'))
+ decoder.decode(b"abc\r")
+ decoder.reset()
+ self.assertEquals(decoder.decode(b"abc"), "abc")
+ self.assertEquals(decoder.newlines, None)
+
+# XXX Tests for open()
+
+class MiscIOTest(unittest.TestCase):
+
+ def testImport__all__(self):
+ for name in io.__all__:
+ obj = getattr(io, name, None)
+ self.assert_(obj is not None, name)
+ if name == "open":
+ continue
+ elif "error" in name.lower():
+ self.assert_(issubclass(obj, Exception), name)
+ else:
+ self.assert_(issubclass(obj, io.IOBase))
+
+
+def test_main():
+ test_support.run_unittest(IOTest, BytesIOTest, StringIOTest,
+ BufferedReaderTest,
+ BufferedWriterTest, BufferedRWPairTest,
+ BufferedRandomTest, TextIOWrapperTest,
+ MiscIOTest)
+
+if __name__ == "__main__":
+ unittest.main()
generated by cgit v0.12 at 2025-03-11 16:48:24 (GMT)