79 lines
2.0 KiB
Python
79 lines
2.0 KiB
Python
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"""Generic (non-gomill-specific) test support code."""
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import errno
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from cStringIO import StringIO
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from gomill_tests.test_framework import SupporterError
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class Mock_writing_pipe(object):
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"""Mock writeable pipe object, with an interface like a cStringIO.
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If this is 'broken', it raises IOError(EPIPE) on any further writes.
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"""
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def __init__(self):
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self.sink = StringIO()
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self.is_broken = False
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def write(self, s):
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if self.is_broken:
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raise IOError(errno.EPIPE, "Broken pipe")
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try:
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self.sink.write(s)
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except ValueError, e:
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raise IOError(errno.EIO, str(e))
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def flush(self):
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self.sink.flush()
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def close(self):
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self.sink.close()
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def simulate_broken_pipe(self):
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self.is_broken = True
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def getvalue(self):
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return self.sink.getvalue()
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class Mock_reading_pipe(object):
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"""Mock readable pipe object, with an interface like a cStringIO.
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Instantiate with the data to provide on the pipe.
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If this is 'broken', it always returns EOF from that point on.
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Set the attribute hangs_before_eof true to simulate a pipe that isn't closed
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when it runs out of data.
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"""
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def __init__(self, response):
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self.source = StringIO(response)
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self.is_broken = False
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self.hangs_before_eof = False
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def read(self, n):
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if self.is_broken:
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return ""
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result = self.source.read(n)
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if self.hangs_before_eof and result == "":
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raise SupporterError("read called with no data; this would hang")
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return result
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def readline(self):
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if self.is_broken:
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return ""
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result = self.source.readline()
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if self.hangs_before_eof and not result.endswith("\n"):
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raise SupporterError(
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"readline called with no newline; this would hang")
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return result
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def close(self):
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self.source.close()
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def simulate_broken_pipe(self):
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self.is_broken = True
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