human
I wrote the below code

    _real_session = PipSession()
    def _fake_session_get(*args, **kwargs):
        resp = _real_session.get(*args, **kwargs)
        del resp.headers['Content-Type']
        return resp
    session = Mock()
    session.get = _fake_session_get
    uri = path_to_url(data.packages.join('simple-1.0.tar.gz'))
    link = Link(uri)
    temp_dir = mkdtemp()
    try:
        unpack_http_url(link, temp_dir, download_dir=None, session=session)
        assert (set(os.listdir(temp_dir)) == set(['PKG-INFO', 'setup.cfg', 'setup.py', 'simple', 'simple.egg-info']))
    finally:
        rmtree(temp_dir)

What's a good function header?

=====
Here's a good function header?
assistant
#Here's a good function header.

def test_unpack_http_url_with_urllib_response_without_content_type(data):