def METHOD_NAME(assert_pixels):
    # <body> is only 1px high, but its overflow is propageted to the viewport
    # ie. the padding edge of the page box.
    assert_pixels('''
        ________
        ________
        __rBBB__
        __BBBB__
        __BBBB__
        ________
        ________
        ________
    ''', '''
      <style>
        @page { size: 8px; margin: 2px 2px 3px 2px }
        body { height: 1px; overflow: hidden; font-size: 0 }
      </style>
      <div><img src="pattern.png"></div>''')