Shadow DOM: Slots and fallback contents

Test passes if there are two lines of text "B", "A" below.

FAIL

A

B

Test passes if there are two lines of text "D", "C" below.

FAIL

C

D

Test passes if there are two lines of text "F", "E" below.

FAIL

E

F

Test passes if there is one line of text "SLOT4" below.

SLOT4

FAIL

FAIL

Test passes if there is one line of text "SLOT5" below.

FAIL

FAIL

FAIL