package com.atlassian.logging.log4j;
   
   import org.apache.log4j.Level;
   import org.apache.log4j.Logger;
   import org.apache.log4j.helpers.PatternConverter;
   import org.apache.log4j.spi.LoggingEvent;
   import org.hamcrest.CoreMatchers;
   import org.junit.Test;
   
  import static org.junit.Assert.*;
  
  public class CategoryCollapsingPatternParserTest
  {
  
      private static final String FQ_LOGGER_NAME = "com.atlassian.logging.log4j.FQName";
  
      Logger logger = Logger.getLogger(FQ_LOGGER_NAME);
  
      private LoggingEvent basicLogEvent = new LoggingEvent(FQ_LOGGER_NAME, logger, System.currentTimeMillis(), Level.ALL, "Some message", null);
  
      @Test
      public void test_that_it_consumes_its_pattern_length_strategy() throws Exception
      {
          // assemble
          PatternConverter converter = createConverter("%Q %m");
  
          // act
          StringBuffer sb = new StringBuffer();
          converter.format(sb, basicLogEvent);
  
          // assert
          String actual = sb.toString();
          assertThat(actual, CoreMatchers.equalTo(FQ_LOGGER_NAME));
  
      }
  
      @Test
      public void test_that_it_consumes_its_pattern_segment_strategy() throws Exception
      {
          // assemble
          PatternConverter converter = createConverter("%q %m");
  
          // act
          StringBuffer sb = new StringBuffer();
          converter.format(sb, basicLogEvent);
  
          // assert
          String actual = sb.toString();
          assertThat(actual, CoreMatchers.equalTo(FQ_LOGGER_NAME));
  
      }
  
      @Test
      public void test_it_collapses_to_spec_length_strategy() throws Exception
      {
          PatternConverter converter = createConverter("%Q{5} %m");
  
          // act
          StringBuffer sb = new StringBuffer();
          converter.format(sb, basicLogEvent);
  
          // assert
          String actual = sb.toString();
          assertThat(actual, CoreMatchers.equalTo("c.a.l.log4j.FQName"));
      }
  
      @Test
      public void test_it_collapses_to_spec_segment_strategy() throws Exception
      {
          PatternConverter converter = createConverter("%q{2} %m");
  
          // act
          StringBuffer sb = new StringBuffer();
          converter.format(sb, basicLogEvent);
  
          // assert
          String actual = sb.toString();
          assertThat(actual, CoreMatchers.equalTo("c.a.logging.log4j.FQName"));
      }
  
      private PatternConverter createConverter(String pattern)
      {
          CategoryCollapsingPatternParser parser = new CategoryCollapsingPatternParser(pattern, -1);
          return parser.parse();
      }
  }