package uk.org.lidalia.slf4jutils;
   
   import java.util.Set;
   
   import org.junit.Test;
   
   import com.google.common.collect.ImmutableSet;
   
   import uk.org.lidalia.slf4jext.Level;
  
  import static org.hamcrest.Matchers.is;
  import static org.junit.Assert.assertArrayEquals;
  import static org.junit.Assert.assertThat;
  import static uk.org.lidalia.slf4jext.Level.DEBUG;
  import static uk.org.lidalia.slf4jext.Level.ERROR;
  import static uk.org.lidalia.slf4jext.Level.INFO;
  import static uk.org.lidalia.slf4jext.Level.TRACE;
  import static uk.org.lidalia.slf4jext.Level.WARN;
  
  public class LevelTests {
  
      @Test
      public void valueSet() {
          assertArrayEquals(Level.values(), Level.valueSet().toArray());
      }
  
      @Test(expected = UnsupportedOperationException.class)
      public void valueSetIsImmutable() {
          Set<Level> levels = Level.valueSet();
          levels.remove(INFO);
      }
  
      @Test
      public void enablableValueSetContains() {
          assertThat(Level.enablableValueSet(), is(ImmutableSet.of(ERROR, WARN, INFO, DEBUG, TRACE)));
      }
  
      @Test(expected = UnsupportedOperationException.class)
      public void enablableValueSetIsImmutable() {
          Set<Level> levels = Level.enablableValueSet();
          levels.remove(Level.INFO);
      }
  }