@Test
public void filterInputNotNullNotNullOutput0() {

  // Arrange
  final HashSet<ConstructId> _set = new HashSet<ConstructId>();
  final String _filter = "";
  // Act
  final Set<ConstructId> retval = JavaId.filter(_set, _filter);
  // Assert result
  final HashSet<ConstructId> hashSet = new HashSet<ConstructId>();
  assertEquals(hashSet, retval);
}