PASS @media is CSSGroupingRule
PASS @media rule type
PASS Empty @media rule length
PASS insertRule of @import into @media
PASS insertRule into empty @media at bad index
PASS insertRule into @media updates length
PASS insertRule of valid @media into @media
PASS insertRule of valid style rule into @media
PASS insertRule of invalid @media into @media
PASS insertRule of empty string into @media
PASS insertRule of valid @media rule followed by garbage into @media
PASS insertRule of valid style rule followed by garbage into @media
PASS insertRule of mutiple valid @media into @media
PASS insertRule of valid style rulle followed by valid @media into @media
PASS insertRule of valid style rule followed by valid @media into @media
PASS insertRule of two valid style rules into @media
PASS Return value of insertRule into @media
PASS @supports is CSSGroupingRule
PASS @supports rule type
PASS Empty @supports rule length
PASS insertRule of @import into @supports
PASS insertRule into empty @supports at bad index
PASS insertRule into @supports updates length
PASS insertRule of valid @media into @supports
PASS insertRule of valid style rule into @supports
PASS insertRule of invalid @media into @supports
PASS insertRule of empty string into @supports
PASS insertRule of valid @media rule followed by garbage into @supports
PASS insertRule of valid style rule followed by garbage into @supports
PASS insertRule of mutiple valid @media into @supports
PASS insertRule of valid style rulle followed by valid @media into @supports
PASS insertRule of valid style rule followed by valid @media into @supports
PASS insertRule of two valid style rules into @supports
PASS Return value of insertRule into @supports