ex2.setStringAsString("2-missing");
ex2.setValue(-1);
in1.add(ex1);
in2.add(ex2);
assertThat(tester.runFlow(new MasterBranchFlowSimple(
in1.flow(), in2.flow(),
high.flow(), low.flow(), stop.flow())), is(true));
List<Ex1> highList = high.toList();
List<Ex1> lowList = low.toList();