def METHOD_NAME(assert_pixels):
    assert_pixels('''
        RRRR__RRRR____
        RRRR__RRRR____
        ______________
        ______________
    ''', '''
        <style>
            @font-face {src: url(weasyprint.otf); font-family: weasyprint}
            @page {size: 14px 4px}
            body {
              color: red;
              font-family: weasyprint;
              font-size: 2px;
              line-height: 1;
            }
        </style>
        <span><span>aa </span></span><span><span> aa</span></span>
    ''')