
PASS Slots: Basic.
PASS Slots: Basic, elements only.
PASS Slots: Slots in closed.
PASS Slots: Slots in closed, elements only.
PASS Slots: Slots not in a shadow tree.
PASS Slots: Slots not in a shadow tree, elements only.
PASS Slots: Distributed nodes for Slots not in a shadow tree.
PASS Slots: Name matching
PASS Slots: No direct host child.
PASS Slots: Default Slot.
PASS Slots: Slot in Slot does not matter in assignment.
PASS Slots: Slot is assigned to another slot
PASS Slots: Open > Closed.
PASS Slots: Closed > Closed.
PASS Slots: Closed > Open.
PASS Slots: Complex case: Basi line.
PASS Slots: Mutation: appendChild.
PASS Slots: Mutation: Change slot= attribute 1.
PASS Slots: Mutation: Change slot= attribute 2.
PASS Slots: Mutation: Change slot= attribute 3.
PASS Slots: Mutation: Remove a child.
PASS Slots: Mutation: Add a slot: after.
PASS Slots: Mutation: Add a slot: before.
PASS Slots: Mutation: Remove a slot.
PASS Slots: Mutation: Change slot name= attribute.
PASS Slots: Mutation: Change slot slot= attribute.