[pseudo-elements-after-part.html]
["::part(mypart)::details-content" should be a valid selector]
expected: FAIL
["::part(mypart)::grammar-error" should be a valid selector]
expected: FAIL
["::part(mypart)::search-text" should be a valid selector]
expected: FAIL
["::part(mypart)::spelling-error" should be a valid selector]
expected: FAIL
["::part(mypart)::view-transition" should be a valid selector]
expected: FAIL
["::part(mypart)::view-transition-group(*)" should be a valid selector]
expected: FAIL
["::part(mypart)::view-transition-image-pair(*)" should be a valid selector]
expected: FAIL
["::part(mypart)::view-transition-new(*)" should be a valid selector]
expected: FAIL
["::part(mypart)::view-transition-old(*)" should be a valid selector]
expected: FAIL
[computed style for ::part()::details-content]
expected: FAIL
[computed style for ::part()::grammar-error]
expected: FAIL
[computed style for ::part()::search-text]
expected: FAIL
[computed style for ::part()::spelling-error]
expected: FAIL
[::part styles with ::part(mypart)::details-content {\n height: 371px;\n } and summary
details