package com.github.davidmoten.guavamini;
   
   import static org.junit.Assert.assertEquals;
   import static org.junit.Assert.assertTrue;
   
   import java.util.Iterator;
   
   import org.junit.Test;
   
  import com.github.davidmoten.junit.Asserts;
  
  public class SetsTest {
  
      @Test
      public void testCreate() {
          assertTrue(Sets.newHashSet(1, 2, 3).contains(2));
      }
  
      @Test
      public void testCreateFromIterator() {
          assertTrue(Sets.newHashSet(Sets.newHashSet(1, 2, 3).iterator()).contains(2));
      }
  
      @Test
      public void testCreateFromIterable() {
          assertTrue(Sets.newHashSet(Sets.newHashSet(1, 2, 3)).contains(2));
      }
  
      @Test
      public void testCreateFromNonCollectionIterable() {
          assertTrue(Sets.newHashSet(new Iterable<Integer>() {
  
              @Override
              public Iterator<Integer> iterator() {
                  return Sets.newHashSet(1, 2).iterator();
              }
          }).contains(2));
      }
  
      @Test
      public void testIsUtilityClass() {
          Asserts.assertIsUtilityClass(Sets.class);
      }
  
      @Test
      public void testCheckNonNegativeZero() {
          Sets.checkNonnegative(0, "boo");
      }
  
      @Test
      public void testCheckNonNegativePositive() {
          Sets.checkNonnegative(1, "boo");
      }
  
      @Test(expected = IllegalArgumentException.class)
      public void testCheckNonNegativeNegative() {
          Sets.checkNonnegative(-1, "boo");
      }
  
      @Test
      public void testCapacityForOne() {
          assertEquals(2, Sets.capacity(1));
      }
  
      @Test
      public void testCapacityForLarge() {
          assertEquals(Integer.MAX_VALUE, Sets.capacity(Sets.MAX_POWER_OF_TWO + 1));
      }
  }