### Question:
PipelinedRegionExecutionView { public boolean isFinished() { return unfinishedVertices.isEmpty(); } PipelinedRegionExecutionView(final PipelinedRegion pipelinedRegion); boolean isFinished(); void vertexFinished(final ExecutionVertexID executionVertexId); void vertexUnfinished(final ExecutionVertexID executionVertexId); PipelinedRegion getPipelinedRegion();  }### Answer:
@Test public void regionIsUnfinishedIfNotAllVerticesAreFinished() { final PipelinedRegion pipelinedRegion = PipelinedRegion.from(TEST_EXECUTION_VERTEX_ID); final PipelinedRegionExecutionView pipelinedRegionExecutionView = new PipelinedRegionExecutionView(pipelinedRegion); assertFalse(pipelinedRegionExecutionView.isFinished()); }