Add silent mode option for testing

DEVSIX-8007

Author: guustysebie

pdftest/src/main/java/com/itextpdf/test/LogListener.java

@@ -45,13 +45,20 @@ This file is part of the iText (R) project.
 public class LogListener extends TestWatcher {
 
     private static final String ROOT_ITEXT_PACKAGE = "com.itextpdf";
+    private static final String ITEXT_LICENCING_PACKAGE = "com.itextpdf.licensing";
+    private static final String ITEXT_ACTIONS_PACKAGE = "com.itextpdf.commons.actions.processors";
+    private static final String TOKEN_ITEXT_LOGLEVEL = "ITEXT_SILENT_MODE";
 
-    private final CustomListAppender<ILoggingEvent> listAppender = new CustomListAppender<>();
-
+    private final CustomListAppender<ILoggingEvent> listAppender;
     private final ILoggerFactory lc = LoggerFactory.getILoggerFactory();
 
     private Map<Logger, Map<String, Appender<ILoggingEvent>>> appenders;
 
+    public LogListener() {
+       String logLevel = getPropertyOrEnvironmentVariable(TOKEN_ITEXT_LOGLEVEL);
+       listAppender = new CustomListAppender<>(parseSilentMode(logLevel));
+    }
+
     @Override
     protected void starting(Description description) {
         before(description);
@@ -63,6 +70,13 @@ protected void finished(Description description) {
         after();
     }
 
+    private boolean parseSilentMode(String logLevel) {
+        if (logLevel == null){
+            return  false;
+        }
+       return logLevel.equalsIgnoreCase("TRUE");
+    }
+
     private int contains(LogMessage loggingStatement) {
         List<ILoggingEvent> list = listAppender.list;
         int index = 0;
@@ -159,9 +173,23 @@ private void checkLogMessages(Description description) {
         }
     }
 
+    private static String getPropertyOrEnvironmentVariable(String name) {
+        String s = System.getProperty(name);
+        if (s == null) {
+            s = System.getenv(name);
+        }
+        return s;
+    }
+
     private class CustomListAppender<E> extends ListAppender<ILoggingEvent> {
 
         private Map<String, Boolean> expectedTemplates = new HashMap<>();
+        private  final boolean runTestsInSilentMode;
+
+        private CustomListAppender(boolean runTestsInSilentMode) {
+            this.runTestsInSilentMode = runTestsInSilentMode;
+        }
+
 
         public void setExpectedTemplates(Map<String, Boolean> expectedTemplates) {
             this.expectedTemplates.clear();
@@ -175,14 +203,27 @@ public void clear() {
 
         protected void append(ILoggingEvent e) {
             if(!isExpectedMessageQuiet(e.getMessage())){
-                System.out.println(e.getLoggerName() + " " + e.getLevel() + " " + e.getMessage());
+                if (shouldPrintMessage(e)){
+                    System.out.println(e.getLoggerName() + " " + e.getLevel() + " " + e.getMessage());
+                }
             }
             printStackTraceIfAny(e);
             if (e.getLevel().isGreaterOrEqual(Level.WARN) || isExpectedMessage(e.getMessage())) {
                 this.list.add(e);
             }
         }
 
+        private boolean shouldPrintMessage(ILoggingEvent level) {
+            //Those 2 if statements are when we rely on the logmessages being printed for certain tests
+            if (level.getLoggerName().startsWith(ITEXT_LICENCING_PACKAGE)){
+                return true;
+            }
+            if (level.getLoggerName().startsWith(ITEXT_ACTIONS_PACKAGE)){
+                return true;
+            }
+            return !runTestsInSilentMode;
+        }
+
         private boolean isExpectedMessage(String message) {
             if (message != null) {
                 for (String template : expectedTemplates.keySet()) {