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from hypothesis import given, strategies as st
from io import StringIO
from os import linesep
LINE_ENDINGS = [u'\n', u'\r', u'\r\n']
@given(txt=st.text(), newline=st.sampled_from(['', '\n']))
def test_simple(txt, newline):
sio = StringIO(txt, newline=newline)
assert sio.getvalue() == txt
@given(values=st.lists(
st.tuples(
st.text(st.characters(blacklist_characters='\r\n'), min_size=1),
st.sampled_from(LINE_ENDINGS))))
def test_universal(values):
output_lines = [line + linesep for line, ending in values]
output = u''.join(output_lines)
input = u''.join(line + ending for line, ending in values)
sio = StringIO(input, newline=None)
sio.seek(0)
assert list(sio) == output_lines
assert sio.getvalue() == output
sio2 = StringIO(newline=None)
for line, ending in values:
sio2.write(line)
sio2.write(ending)
sio2.seek(0)
assert list(sio2) == output_lines
assert sio2.getvalue() == output
@given(
lines=st.lists(st.text(st.characters(blacklist_characters='\r\n'))),
newline=st.sampled_from(['\r', '\r\n']))
def test_crlf(lines, newline):
output_lines = [line + newline for line in lines]
output = u''.join(output_lines)
input = u''.join(line + '\n' for line in lines)
sio = StringIO(input, newline=newline)
sio.seek(0)
assert list(sio) == output_lines
assert sio.getvalue() == output
sio2 = StringIO(newline=newline)
for line in lines:
sio2.write(line)
sio2.write(u'\n')
sio2.seek(0)
assert list(sio2) == output_lines
assert sio2.getvalue() == ''.join(output_lines)
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