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# Copyright (c) 2009 Oliver Cope. All rights reserved.
# See LICENSE.txt for terms of redistribution and use.
"""
Tests for pesto/utils.py
"""
from __future__ import with_statement
from cStringIO import StringIO, OutputType as cStringIO_OutputType
from nose.tools import assert_equal, assert_true
from pesto.utils import ExpandableOutput, PutbackInput, DelimitedInput
def test_expandableio():
with ExpandableOutput(10) as eio:
eio.write('abc')
eio.seek(0)
assert_equal(eio.read(), 'abc')
assert_true(isinstance(eio._io, cStringIO_OutputType))
eio.write('defghij')
assert_true(isinstance(eio._io, cStringIO_OutputType))
eio.write('k')
assert_true(isinstance(eio._io, file))
eio.seek(0)
assert_equal(eio.read(), 'abcdefghijk')
def test_putbackio_nested_putbacks():
s = StringIO('one,two,three')
s.seek(0)
p = PutbackInput(s)
a = s.read(3)
b = s.read(3)
p.putback(b)
p.putback(a)
assert_equal(p.read(), 'one,two,three')
def test_putbackio_read_from_putback_short():
"""
Test read for a length smaller than the putback buffer
"""
s = StringIO('one,two,three')
s.seek(0)
p = PutbackInput(s)
a = p.read(4)
b = p.read(4)
p.putback(b)
p.putback(a)
assert_equal(p.read(7), "one,two")
def test_putbackio_read_from_putback_and_stream_long():
"""
Test read for a length longer than the putback buffer
"""
s = StringIO('one,two,three')
s.seek(0)
p = PutbackInput(s)
a = p.read(2)
b = p.read(2)
p.putback(b)
p.putback(a)
assert_equal(p.read(7), "one,two")
def test_putbackio_readline_from_putback_and_stream_short():
"""
Test readline for a length shorter than the putback buffer
"""
s = StringIO('one two\nthree four\n')
s.seek(0)
p = PutbackInput(s)
a = p.read(4)
b = p.read(4)
p.putback(b)
p.putback(a)
assert_equal(p.readline(10), "one two\n")
def test_putbackio_readline_from_putback_and_stream_long():
"""
Test readline for a length longer than the putback buffer
"""
s = StringIO('one two\nthree four\n')
s.seek(0)
p = PutbackInput(s)
a = p.read(2)
b = p.read(2)
p.putback(b)
p.putback(a)
assert_equal(p.readline(10), "one two\n")
def test_delimitedio_read():
s = StringIO('one--two--three')
s.seek(0)
p = PutbackInput(s)
assert_equal(DelimitedInput(p, '--').read(100), 'one')
assert_equal(DelimitedInput(p, '--').read(100), 'two')
assert_equal(DelimitedInput(p, '--').read(100), 'three')
assert_equal(DelimitedInput(p, '--').read(100), '')
# delimiters are handled correctly, even when they straddle a
# block (as determined by ``size``)
s = StringIO('one--two--three')
s.seek(0)
p = PutbackInput(s)
d = DelimitedInput(p, '--')
assert_equal(d.read(2), 'on')
assert_equal(d.read(2), 'e')
assert_equal(d.read(2), '')
def test_delimitedio_readline():
s = StringIO('one\ntwo|\nthree\n')
s.seek(0)
p = PutbackInput(s)
d = DelimitedInput(p, '|')
assert_equal(d.readline(), 'one\n')
assert_equal(d.readline(), 'two')
assert_equal(d.readline(), '')
# The case where a newline forms part of the delimiter
s = StringIO('one\ntwo\n--three\n')
s.seek(0)
p = PutbackInput(s)
d = DelimitedInput(p, '\n--')
assert_equal(d.readline(), 'one\n')
assert_equal(d.readline(), 'two')
assert_equal(d.readline(), '')
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