package de.bwaldvogel.liblinear;
   
   import static org.fest.assertions.Assertions.assertThat;
   
   import org.junit.Test;
   
   
   public class FeatureNodeTest {
   
      public void testConstructorIndexZero() {
          // since 1.5 there's no more exception here
          new FeatureNode(0, 0);
      }
  
      @Test(expected = IllegalArgumentException.class)
      public void testConstructorIndexNegative() {
          new FeatureNode(-1, 0);
      }
  
      public void testConstructorHappy() {
          FeatureNode fn = new FeatureNode(25, 27.39);
          assertThat(fn.index).isEqualTo(25);
          assertThat(fn.value).isEqualTo(27.39);
  
          fn = new FeatureNode(1, -0.22222);
          assertThat(fn.index).isEqualTo(1);
          assertThat(fn.value).isEqualTo(-0.22222);
      }
  }