Minecraft wiki entry for Development_versions, associated text: Updated interfaces:
assertContainerContains
ItemIdentifier parameter changed to ItemStack
assertItemEntityNotPresent and assertItemEntityPresent APIs
ItemStack parameter changed to ItemType
Added new interfaces:
assertEntityNotTouching(entityIdentifier: string, position : Location)
Asserts that there is no entity of the given type at the given position
assertEntityTouching(entityIdentifier: string, position : Location)
Asserts that there is an entity of the given type at the given position
assertItemEntityCountIs(itemType : ItemType, position : BlockLocation, searchDistance : number, count : number)
Asserts that the entity item count in the given search area matches the expected count
pulseRedstone(position : BlockLocation, duration : number)
Creates a Redstone block at the given position and destroys it after "duration" ticks