def METHOD_NAME(requests_mock):
    """
    Test invalid input scenarios.
    """
    apc = AirflowPackageCatalogConnector(AIRFLOW_SUPPORTED_FILE_TYPES)
    # Input is an invalid URL/host.
    requests_mock.get("http://no.such.host/a-file", real_http=True)
    ce = apc.get_catalog_entries({"airflow_package_download_url": "http://no.such.host/a-file"})
    assert len(ce) == 0
    # Input is a valid URL but does not include a filename.
    requests_mock.get("http://server.domain.com", text="a-file-content")
    ce = apc.get_catalog_entries({"airflow_package_download_url": "http://server.domain.com/"})
    assert len(ce) == 0
    # Input is a valid URL, but does not return a ZIP-compressed file.
    requests_mock.get("http://server.domain.com/a-file", text="another-file-content")
    ce = apc.get_catalog_entries({"airflow_package_download_url": "http://server.domain.com/a-file"})
    assert len(ce) == 0
    # Input is a valid URL and a ZIP-compressed file, but is not an Airflow built distribution.
    zip_buffer = io.BytesIO()
    with zipfile.ZipFile(zip_buffer, "a", zipfile.ZIP_DEFLATED) as zip_file:
        zip_file.writestr("dummy_file.txt", "I am a dummy file, living in a ZIP archive.")
    requests_mock.get("http://server.domain.com/a-zip-file", content=zip_buffer.getvalue())
    ce = apc.get_catalog_entries({"airflow_package_download_url": "http://server.domain.com/a-zip-file"})
    assert len(ce) == 0