/*
    * Licensed under the GPL License. You may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    *   https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
    *
    * THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
    * WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
    * PURPOSE.
   */
  package psiprobe.tools;
  
  import static org.mockito.Mockito.when;
  
  import java.io.IOException;
  import java.io.PrintStream;
  
  import org.junit.jupiter.api.Assertions;
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.api.extension.ExtendWith;
  import org.mockito.Mock;
  import org.mockito.junit.jupiter.MockitoExtension;
  import org.slf4j.Logger;
  
  /**
   * The Class LogOutputStreamTest.
   */
  @ExtendWith(MockitoExtension.class)
  class LogOutputStreamTest {
  
    /** The stream. */
    PrintStream stream;
  
    /** The log. */
    @Mock
    Logger log;
  
    /**
     * Logger test.
     *
     * @throws IOException Signals that an I/O exception has occurred.
     */
    @Test
    void loggerTest() throws IOException {
      stream = LogOutputStream.createPrintStream(log, LogOutputStream.LEVEL_ERROR);
      stream.write('\u0001');
    }
  
    @Test
    void testLevelTrace() {
      when(log.isTraceEnabled()).thenReturn(true);
      stream = LogOutputStream.createPrintStream(log, LogOutputStream.LEVEL_TRACE);
      Assertions.assertNotNull(stream);
      stream.print("trace message");
      stream.flush();
    }
  
    @Test
    void testLevelDebug() {
      when(log.isDebugEnabled()).thenReturn(true);
      stream = LogOutputStream.createPrintStream(log, LogOutputStream.LEVEL_DEBUG);
      Assertions.assertNotNull(stream);
      stream.print("debug message");
      stream.flush();
    }
  
    @Test
    void testLevelInfo() {
      when(log.isInfoEnabled()).thenReturn(true);
      stream = LogOutputStream.createPrintStream(log, LogOutputStream.LEVEL_INFO);
      Assertions.assertNotNull(stream);
      stream.print("info message");
      stream.flush();
    }
  
    @Test
    void testLevelWarn() {
      when(log.isWarnEnabled()).thenReturn(true);
      stream = LogOutputStream.createPrintStream(log, LogOutputStream.LEVEL_WARN);
      Assertions.assertNotNull(stream);
      stream.print("warn message");
      stream.flush();
    }
  
    @Test
    void testLevelOff() {
      stream = LogOutputStream.createPrintStream(log, LogOutputStream.LEVEL_OFF);
      Assertions.assertNotNull(stream);
      stream.print("off message - should not be logged");
      stream.flush();
    }
  
    @Test
    void testLevelFatal() {
      // LEVEL_FATAL (6) hits default case in shouldWrite(), returns false so no logging
      stream = LogOutputStream.createPrintStream(log, LogOutputStream.LEVEL_FATAL);
      Assertions.assertNotNull(stream);
      stream.print("fatal message");
      stream.flush();
   }
 
   @Test
   void testFlushWithEmptyBuffer() {
     when(log.isInfoEnabled()).thenReturn(true);
     stream = LogOutputStream.createPrintStream(log, LogOutputStream.LEVEL_INFO);
     // flush with empty buffer should not log
     stream.flush();
   }
 
   @Test
   void testNullLogThrows() {
     Assertions.assertThrows(IllegalArgumentException.class,
         () -> LogOutputStream.createPrintStream(null, LogOutputStream.LEVEL_INFO));
   }
 }