### Question:
KettleLogLayout { public String format( KettleLoggingEvent event ) { StringBuilder line = new StringBuilder(); String dateTimeString = ""; if ( timeAdded ) { dateTimeString = LOCAL_SIMPLE_DATE_PARSER.get().format( new Date( event.timeStamp ) ) + " - "; } Object object = event.getMessage(); if ( object instanceof LogMessage ) { LogMessage message = (LogMessage) object; String[] parts = message.getMessage() == null ? new String[] {} : message.getMessage().split( Const.CR ); for ( int i = 0; i < parts.length; i++ ) { line.append( dateTimeString ); if ( message.getSubject() != null ) { line.append( message.getSubject() ); if ( message.getCopy() != null ) { line.append( "." ).append( message.getCopy() ); } line.append( " - " ); } if ( i == 0 && message.isError() ) { BuildVersion buildVersion = BuildVersion.getInstance(); line.append( ERROR_STRING ); line.append( " (version " ); line.append( buildVersion.getVersion() ); if ( !Utils.isEmpty( buildVersion.getRevision() ) ) { line.append( ", build " ); line.append( buildVersion.getRevision() ); } if ( !Utils.isEmpty( buildVersion.getBuildDate() ) ) { line.append( " from " ); line.append( buildVersion.getBuildDate() ); } if ( !Utils.isEmpty( buildVersion.getBuildUser() ) ) { line.append( " by " ); line.append( buildVersion.getBuildUser() ); } line.append( ") : " ); } line.append( parts[i] ); if ( i < parts.length - 1 ) { line.append( Const.CR ); } } } else { line.append( dateTimeString ); line.append( ( object != null ? object.toString() : "<null>" ) ); } return line.toString(); } KettleLogLayout();  KettleLogLayout( boolean addTime ); String format( KettleLoggingEvent event ); boolean ignoresThrowable(); void activateOptions(); boolean isTimeAdded(); void setTimeAdded( boolean addTime ); static final String ERROR_STRING; }### Answer:
@Test public void testFormat() throws Exception { LogMessage mcg = new LogMessage( "Log message for {0}", "Channel 01", new String[]{ "Test" }, LogLevel.DEBUG ); mcg.setSubject( "Subject" ); KettleLoggingEvent event = new KettleLoggingEvent( mcg, 0, LogLevel.BASIC ); KettleLogLayout layout = new KettleLogLayout(); final String formattedMsg = layout.format( event ); Assert.assertEquals( "The log message must be formatted and not contain placeholders.", "Subject - Log message for Test", formattedMsg.substring( formattedMsg.indexOf( '-' ) + 2 ) ); }