This test checks font weights.

font-weight not specified font-weight="normal" font-weight="bold" font-weight="100" font-weight="200" font-weight="300" font-weight="400" font-weight="500" font-weight="600" font-weight="700" font-weight="800" font-weight="900" font-weight="lighter" font-weight="lighter" font-weight="lighter" font-weight="lighter" font-weight="lighter" font-weight="lighter" font-weight="lighter" font-weight="lighter" font-weight="lighter" font-weight="100" font-weight="bolder" font-weight="bolder" font-weight="bolder" font-weight="bolder" font-weight="bolder" font-weight="bolder" font-weight="bolder" font-weight="bolder" font-weight="bolder"