'Create a zip file with the given file name and compression scheme.'

def _makebigfile(self, filename, compression, junk):

    with zipfile.ZipFile(filename, 'w', compression) as zf:
        for i in range(10):
            fn = ('zipstream%d' % i)
            zf.writestr(fn, '')
        zf.writestr('zipstreamjunk', junk)
