### Question:
PartitionMapperFlowsFactory implements FlowsFactory { @Override public Collection<String> getOutputFlows() { return Collections.singleton(Branches.DEFAULT_BRANCH); }  @Override Collection<String> getInputFlows(); @Override Collection<String> getOutputFlows();  }### Answer:
@Test void testGetOutputFlows() { PartitionMapperFlowsFactory factory = new PartitionMapperFlowsFactory(); Collection<String> outputs = factory.getOutputFlows(); Assertions.assertEquals(1, outputs.size()); Assertions.assertTrue(outputs.contains("__default__")); }