def METHOD_NAME(self):
    """Test high precision FITS keyword read."""
    hdr = {"MJDTESTI": 100, "MJDTESTF": np.longdouble(0.5), "CIAO": np.longdouble(0.0)}
    assert high_precision_keyword_read(hdr, "MJDTEST") == np.longdouble(
        100.5
    ), "Keyword MJDTEST read incorrectly"
    assert high_precision_keyword_read(hdr, "MJDTESTA") == np.longdouble(
        100.5
    ), "Keyword MJDTESTA read incorrectly"
    assert high_precision_keyword_read(hdr, "CIAO") == np.longdouble(
        0.0
    ), "Keyword CIAO read incorrectly"
    assert high_precision_keyword_read(hdr, "BU") is None, "Inexistent key read incorrectly"