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"""
Tests for the PyPy cStringIO implementation.
"""
from cStringIO import StringIO
data = b"some bytes"
def test_reset():
"""
Test that the reset method of cStringIO objects sets the position
marker to the beginning of the stream.
"""
stream = StringIO()
stream.write(data)
assert stream.read() == ''
stream.reset()
assert stream.read() == data
stream = StringIO(data)
assert stream.read() == data
assert stream.read() == ''
stream.reset()
assert stream.read() == data
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