test_misc.py 文件源码

def test_iter (self):
        '''See the note in test_readlines() for an explaination as to why
        I allow line3 and line4 to return multiple patterns.
        Basically, this is done to handle a valid condition on slow systems.
        '''
        child = pexpect.spawn('cat')
        child.sendline ("abc")
        time.sleep(0.5)
        child.sendline ("123")
        time.sleep(0.5)
        child.sendeof()
        # Don't use ''.join() because we want to test the ITERATOR.
        page = b''
        for line in child:
            page += line
        page = page.replace(_CAT_EOF, b'')
        # This is just a really bad test all together, we should write our
        # own 'cat' utility that only writes to stdout after EOF is recv,
        # this must take into consideration all possible platform impl.'s
        # of `cat', and their related terminal and line-buffer handling
        assert (page == b'abc\r\nabc\r\n123\r\n123\r\n' or
                page == b'abc\r\n123\r\nabc\r\n123\r\n' or
                page == b'abc\r\n123abc\r\n\r\n123\r\n') , \
               "iterator did not work. page=%r" % (page,)