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"""Test handling of newlines via file's read and readline
Made for Jython.
"""
import os
import sys
import tempfile
import test.test_support as test_support
import unittest
assert not os.linesep == '\r', ('os.linesep of %r is not supported' %
os.linesep)
LF = os.linesep == '\n'
CRLF = os.linesep == '\r\n'
CRLF_TEST = 'CR\rLF\nCRLF\r\nEOF'
if sys.platform.startswith('java'):
from org.python.core.io import TextIOBase
READAHEAD_SIZE = TextIOBase.CHUNK_SIZE
else:
READAHEAD_SIZE = 300
class BaseTestCase(unittest.TestCase):
data = CRLF_TEST
write_mode = 'wb'
mode = 'r'
bufsize = -1
def setUp(self):
self.filename = tempfile.mktemp()
self.write_fp = open(self.filename, self.write_mode, self.bufsize)
self.write_fp.write(self.data)
self.write_fp.flush()
self.fp = open(self.filename, self.mode, self.bufsize)
def tearDown(self):
if self.write_fp:
self.write_fp.close()
if self.fp:
self.fp.close()
os.remove(self.filename)
class ReadBinaryNewlinesTestCase(BaseTestCase):
mode = 'rb'
def test_binary_read(self):
read(self.fp, CRLF_TEST)
self.fp.seek(0)
read(self.fp, CRLF_TEST, len(CRLF_TEST))
self.fp.seek(0)
read(self.fp, 'CR\r', 3)
read(self.fp, 'LF\n', 3)
read(self.fp, 'CRLF\r\n', 6)
read(self.fp, 'EOF', 3)
def test_binary_readline(self):
readline(self.fp, 'CR\rLF\n')
readline(self.fp, 'CRLF\r\n')
readline(self.fp, 'EOF')
self.fp.seek(0)
readline(self.fp, 'CR\rLF\n', 6)
readline(self.fp, 'CRLF\r\n', 6)
readline(self.fp, 'EOF', 3)
if LF:
class ReadTextNewlinesTestCase(ReadBinaryNewlinesTestCase):
mode = 'r'
else:
class ReadTextNewlinesTestCase(BaseTestCase):
def test_text_read(self):
read(self.fp, 'CR\rLF\nCRLF\nEOF')
self.fp.seek(0)
read(self.fp, 'CR\rLF\nCRLF\nEOF', len('CR\rLF\nCRLF\nEOF'))
self.fp.seek(0)
read(self.fp, 'CR\r', 3)
read(self.fp, 'LF\n', 3)
read(self.fp, 'CRLF\n', 5)
read(self.fp, 'EOF', 3)
def test_text_readline(self):
readline(self.fp, 'CR\rLF\n')
readline(self.fp, 'CRLF\n')
readline(self.fp, 'EOF')
self.fp.seek(0)
readline(self.fp, 'CR\rLF\n', 6)
readline(self.fp, 'CRLF\n', 5)
readline(self.fp, 'EOF', 3)
class ReadTextBasicBoundaryTestCase(BaseTestCase):
data = 'CR\r'
read_data = 'CR\r'
def test_read_basic_boundary(self):
read(self.fp, self.read_data)
self.fp.seek(0)
read(self.fp, self.read_data, 3)
def test_readline_basic_boundary(self):
readline(self.fp, self.read_data)
self.fp.seek(0)
readline(self.fp, self.read_data, 3)
class ReadUniversalBasicBoundaryTestCase(ReadTextBasicBoundaryTestCase):
mode = 'U'
read_data = 'CR\n'
class BinaryReadaheadBoundaryTestCase(BaseTestCase):
mode = 'rb'
data = 'foo\n' + ('x' * READAHEAD_SIZE)
def test_read_boundary(self):
readline(self.fp, 'foo\n')
read(self.fp, 'x' * READAHEAD_SIZE, READAHEAD_SIZE)
def test_readline_boundary(self):
readline(self.fp, 'foo\n')
readline(self.fp, 'x' * READAHEAD_SIZE, READAHEAD_SIZE)
class TextReadaheadBoundaryTestCase(BinaryReadaheadBoundaryTestCase):
mode = 'r'
class UniversalReadaheadBoundaryTestCase(BinaryReadaheadBoundaryTestCase):
mode = 'U'
class TextReadaheadBoundary2TestCase(BaseTestCase):
"""For CRLF platforms only"""
data = ('x' * (READAHEAD_SIZE + 1)) + '\r\n'
def test_read_boundary2(self):
read(self.fp, 'x' * (READAHEAD_SIZE + 1), READAHEAD_SIZE + 1)
read(self.fp, '\n')
class UniversalReadaheadBoundary2TestCase(TextReadaheadBoundary2TestCase):
mode = 'U'
class TextReadaheadBoundary3TestCase(BaseTestCase):
"""For CRLF platforms only"""
mode = 'r'
data = ('x' * (READAHEAD_SIZE - 1)) + '\r\n'
def test_read_boundary3(self):
size = READAHEAD_SIZE - 1
read(self.fp, 'x' * size, size)
read(self.fp, '\n')
self.fp.seek(0)
read(self.fp, ('x' * size) + '\n', READAHEAD_SIZE)
def test_readline_boundary3(self):
size = READAHEAD_SIZE - 1
readline(self.fp, 'x' * size, size)
readline(self.fp, '\n')
def test_read_boundary3_with_extra(self):
self.write_fp.seek(0, 2)
self.write_fp.write('foo')
self.write_fp.flush()
self.write_fp.seek(0)
size = READAHEAD_SIZE - 1
read(self.fp, ('x' * size) + '\nfoo', READAHEAD_SIZE + 3)
class UniversalReadaheadBoundary3TestCase(TextReadaheadBoundary3TestCase):
mode = 'U'
class TextReadaheadBoundary4TestCase(BaseTestCase):
"""For CRLF platforms only"""
mode = 'r'
data = ('x' * (READAHEAD_SIZE - 2)) + '\n\r'
def test_read_boundary4(self):
readline(self.fp, 'x' * (READAHEAD_SIZE - 2) + '\n')
self.write_fp.write('\n')
self.write_fp.flush()
read(self.fp, '\n')
def test_readline_boundary4(self):
readline(self.fp, 'x' * (READAHEAD_SIZE - 2) + '\n')
self.write_fp.write('\n')
self.write_fp.flush()
readline(self.fp, '\n')
class UniversalReadaheadBoundary4TestCase(TextReadaheadBoundary4TestCase):
mode = 'U'
data = ('x' * (READAHEAD_SIZE - 2)) + '\n\r'
class TextReadaheadBoundary5TestCase(BaseTestCase):
"""For CRLF platforms only"""
mode = 'r'
data = 'foobar\n' + ('x' * (READAHEAD_SIZE + 1))
def test_boundary5(self):
readline(self.fp, 'foobar\n')
read(self.fp, 'x' * (READAHEAD_SIZE + 1), READAHEAD_SIZE + 1)
class UniversalReadaheadBoundary5TestCase(TextReadaheadBoundary5TestCase):
mode = 'U'
class TextCRAtReadheadBoundaryTestCase(BaseTestCase):
"""For CRLF platforms only"""
data = ('x' * (READAHEAD_SIZE - 1)) + '\rfoo'
read_data = data
def test_readline_cr_at_boundary(self):
readline(self.fp, self.read_data, len(self.read_data))
self.fp.seek(0)
readline(self.fp, self.read_data)
class TextCRAtReadheadBoundary2TestCase(TextCRAtReadheadBoundaryTestCase):
"""For CRLF platforms only"""
data = ('x' * (READAHEAD_SIZE - 1)) + '\r' + ('x' * 300)
read_data = data
class UniversalCRAtReadaheadBoundaryTestCase(BaseTestCase):
mode = 'U'
bufsize = 0
data = ('-' * 1023) + '\r\n' + ('-' * 10233)
def test_read_cr_at_boundary(self):
# Used to raise a BufferOverflowException w/ bufsize of 0
read(self.fp, ('-' * 1023) + '\n', 1024)
class WriteTextNewlinesTestCase(BaseTestCase):
write_mode = 'w'
mode = 'rb'
def test_text_written(self):
if LF:
readline(self.fp, 'CR\rLF\n')
readline(self.fp, 'CRLF\r\n')
elif CRLF:
readline(self.fp, 'CR\rLF\r\n')
readline(self.fp, 'CRLF\r\r\n')
readline(self.fp, 'EOF')
class ReadUniversalNewlinesTestCase(BaseTestCase):
mode = 'rU'
def test_read(self):
read(self.fp, 'CR\nLF\nCRLF\nEOF')
self.fp.seek(0)
read(self.fp, 'CR\nLF\nCRLF\nEOF', 14)
def test_readline(self):
readline(self.fp, 'CR\n')
assert self.fp.newlines == None, repr(self.fp.newlines)
readline(self.fp, 'LF\n')
assert self.fp.newlines == ('\r', '\n'), repr(self.fp.newlines)
readline(self.fp, 'CRLF\n')
assert self.fp.newlines == ('\r', '\n'), repr(self.fp.newlines)
readline(self.fp, 'EOF')
assert self.fp.newlines == ('\r', '\n', '\r\n'), repr(self.fp.newlines)
self.fp.seek(0)
readline(self.fp, 'CR\n', 3)
readline(self.fp, 'LF\n', 3)
readline(self.fp, 'CRLF\n', 5)
readline(self.fp, 'EOF', 3)
def test_seek(self):
# Ensure seek doesn't confuse CRLF newline identification
self.fp.seek(6)
readline(self.fp, 'CRLF\n')
assert self.fp.newlines == None
self.fp.seek(5)
readline(self.fp, '\n')
assert self.fp.newlines == '\n'
class WriteUniversalNewlinesTestCase(unittest.TestCase):
def test_fails(self):
try:
open(tempfile.mktemp(), 'wU')
except ValueError:
pass
else:
raise AssertionError("file mode 'wU' did not raise a "
"ValueError")
def read(fp, data, size=-1):
line = fp.read(size)
assert line == data, 'read: %r expected: %r' % (line, data)
def readline(fp, data, size=-1):
line = fp.readline(size)
assert line == data, 'readline: %r expected: %r' % (line, data)
def test_main():
tests = [ReadBinaryNewlinesTestCase,
ReadTextNewlinesTestCase,
ReadTextBasicBoundaryTestCase,
ReadUniversalBasicBoundaryTestCase,
BinaryReadaheadBoundaryTestCase,
TextReadaheadBoundaryTestCase,
UniversalReadaheadBoundaryTestCase,
UniversalReadaheadBoundary2TestCase,
UniversalReadaheadBoundary3TestCase,
UniversalReadaheadBoundary4TestCase,
UniversalReadaheadBoundary5TestCase,
UniversalCRAtReadaheadBoundaryTestCase,
WriteTextNewlinesTestCase,
ReadUniversalNewlinesTestCase,
WriteUniversalNewlinesTestCase]
if CRLF:
tests.extend([TextReadaheadBoundary2TestCase,
TextReadaheadBoundary3TestCase,
TextReadaheadBoundary4TestCase,
TextReadaheadBoundary5TestCase,
TextCRAtReadheadBoundaryTestCase,
TextCRAtReadheadBoundary2TestCase])
test_support.run_unittest(*tests)
if __name__ == '__main__':
test_main()
|
