fun <K, T : Map<out K, *>> Expect<T>.containsNotKey(key: K): Expect<T> (source)
Expects that the subject of this expectation (a Map) does not contain the given key.
expect(mapOf(1 to "a")).containsNotKey(2)
fails {
expect(mapOf(1 to "a")).containsNotKey(1) // fails because the map contains key that equals 1
}Return
an Expect for the subject of this expectation.