### Question:
LineageWriter implements ILineageWriter { public OutputStream getProfileOutputStream() { if ( profileOutputStream == null ) { profileOutputStream = System.out; } return profileOutputStream; }  @Override void outputExecutionProfile( LineageHolder holder ); @Override void outputLineageGraph( LineageHolder holder ); OutputStream getProfileOutputStream(); OutputStream getGraphOutputStream(); void setProfileOutputStream( OutputStream profileOutputStream ); void setGraphOutputStream( OutputStream graphOutputStream ); IGraphWriter getGraphWriter(); void setGraphWriter( IGraphWriter graphWriter ); @Override String getOutputStrategy(); @Override void setOutputStrategy( String strategy ); @Override void cleanOutput( LineageHolder holder );  }### Answer:
@Test public void testGetSetProfileOutputStream() throws Exception { assertNotNull( writer.getProfileOutputStream() ); }