def test_header(calver, exp_type):
    """Create a header-like dict from `calver` and `exp_type` to support
    testing.
    """
    header = {
        "META.INSTRUMENT.NAME" : "SYSTEM",
        "REFTYPE" : "CRDSCFG",
        "META.CALIBRATION_SOFTWARE_VERSION" : calver,
        "META.EXPOSURE.TYPE" : exp_type,
        }
    return header