def METHOD_NAME(assert_pixels):
    assert_pixels('''
        hhhhhhhhh
        hhhhhhhhh
        hhhhhhhhh
        hhhhhhhhh
        hhhhhhhhh
    ''', '''<style>@page { size: 9px 5px; background:
    repeating-linear-gradient(
      to right, black 3px, black 3px, #800080 3px, #800080 3px
    )''')