Expects that the subject of this expectation (a Map) does not contain the given key.
Return
an Expect for the subject of this expectation.
Since
0.17.0
Samples
expect(mapOf(1 to "a")).notToContainKey(2)
fails { // because the map contains a key which equals 1
expect(mapOf(1 to "a")).notToContainKey(1)
}