
PASS Must be a function according to typeof 
PASS Must have the correct [[Prototype]] 
PASS Must have the correct property descriptor 
PASS Must throw a TypeError when called or constructed 
PASS Must not have a .prototype property 
PASS Must have an own name property equal to the interface name and with the correct descriptors 
PASS Must have an own length property with value zero and the correct descriptors 
PASS instanceof must throw but only when we don't bail out early