### Question:
FileSystemLineageWriter implements ILineageWriter { protected OutputStream getProfileOutputStream( LineageHolder holder ) { return createOutputStream( holder, ".execution.js" ); } FileSystemLineageWriter(); @Override void outputExecutionProfile( LineageHolder holder ); @Override void outputLineageGraph( LineageHolder holder ); IGraphWriter getGraphWriter(); void setGraphWriter( IGraphWriter graphWriter ); String getOutputFolder(); void setOutputFolder( String outputFolder ); @Override String getOutputStrategy(); @Override void setOutputStrategy( String strategy ); @Override void cleanOutput( LineageHolder holder ); static final String DEFAULT_OUTPUT_FOLDER; }### Answer:
@Test public void testGetSetProfileOutputStream() throws Exception { assertNotNull( writer.getProfileOutputStream( holder ) ); }