class EmptySetProblem {
 fun issuesWithEmptyDescription(issues: Set<String>): Set<String> {
 return issues.filter { it.length < 5 }.toSet()
 }
}

 @Test
 @DisplayName("issuesWithEmptyDescription: issues = test collection")
 fun testIssuesWithEmptyDescription() {
 val emptySetProblem = EmptySetProblem()
 val issues = HashSet()
 issues.add("aqyas")
 issues.add("hxgvr")
 issues.add("aqyas")
 issues.add("yippo")
 issues.add("aqyas")
 
 val actual = (emptySetProblem.issuesWithEmptyDescription(issues) as EmptySet)
 
 val expected = (createInstance("kotlin.collections.EmptySet") as EmptySet)
...