package com.github.davidmoten.aws.lw.client.internal.util;
   
   import org.junit.Test;
   
   import com.github.davidmoten.junit.Asserts;
   
   public class PreconditionsTest {
   
       @Test
      public void isUtilityClass() {
          Asserts.assertIsUtilityClass(Preconditions.class);
      }
      
      @Test(expected=IllegalArgumentException.class)
      public void wantIAEnotNPE() {
          Preconditions.checkNotNull(null, "hey!");
      }
  
  }