// empty array
false
// non-object element in array
false
// filter missing description
false
// filter missing extension
false
// empty description
false
// empty extension
false
// string arg
false
// number arg
false
// null arg
false
// undefined arg (single explicit undefined)
false
// filter inherits description+extension from prototype
false
// filter description+extension via addProperty getter
true
// description toString throws
caught: oops-desc
// extension toString throws
caught: oops-ext
// description getter throws
false
// extension getter throws
false
// description getter returns empty string
false
// macType toString throws
caught: oops-mac
