notToContainKey

infix fun <K, T : Map<out K, *>> Expect<T>.notToContainKey(key: K): Expect<T>(source)

Expects that the subject of this expectation (a Map) does not contain the given key.

an Expect for the subject of this expectation.

expect(mapOf(1 to "a")) notToContainKey 2

fails { // because the map contains a key which equals 1
    expect(mapOf(1 to "a")) notToContainKey 1
}