def returns_1_when_stream_has_fileno_but_is_not_a_tty(self, fcntl):
# It blows up otherwise anyways (struct.unpack gets mad because
# result isn't a string of the right length) but let's make
# ioctl die similarly to the real world case we're testing for
# here (#425)
fcntl.ioctl.side_effect = IOError(
"Operation not supported by device")
stream = Mock(isatty=lambda: False, fileno=lambda: 17) # arbitrary
assert bytes_to_read(stream) == 1
assert not fcntl.ioctl.called
def returns_1_when_stream_has_fileno_but_is_not_a_tty(self, fcntl):
# It blows up otherwise anyways (struct.unpack gets mad because
# result isn't a string of the right length) but let's make
# ioctl die similarly to the real world case we're testing for
# here (#425)
fcntl.ioctl.side_effect = IOError(
"Operation not supported by device"
)
stream = Mock(isatty=lambda: False, fileno=lambda: 17) # arbitrary
assert bytes_to_read(stream) == 1
assert not fcntl.ioctl.called
def returns_1_when_stream_lacks_fileno(self, fcntl):
# A fileno() that exists but returns a non-int is a quick way
# to fail util.has_fileno().
assert bytes_to_read(Mock(fileno=lambda: None)) == 1
assert not fcntl.ioctl.called
def returns_1_when_stream_lacks_fileno(self, fcntl):
# A fileno() that exists but returns a non-int is a quick way
# to fail util.has_fileno().
assert bytes_to_read(Mock(fileno=lambda: None)) == 1
assert not fcntl.ioctl.called