package random;

import static org.junit.Assert.*;
import org.junit.Test;

public class UtilTEST {

  @Test
  public void testEquals() {
    assertTrue (Util.isEquals(0.3, 0.3+0.5*Util.EPSILON));
    assertFalse(Util.isEquals(0.3, 0.3+2.0*Util.EPSILON));
    assertFalse(Util.isLess(0.3, 0.3+0.5*Util.EPSILON));
    assertTrue (Util.isLess(0.3, 0.3+2.0*Util.EPSILON));
    assertTrue (Util.isLessOrEquals(0.3, 0.3+0.5*Util.EPSILON));
    assertTrue (Util.isLessOrEquals(0.3, 0.3+2.0*Util.EPSILON));

    assertTrue (Util.isEquals(0.3+0.5*Util.EPSILON, 0.3));
    assertFalse(Util.isEquals(0.3+2.0*Util.EPSILON, 0.3));
    assertFalse(Util.isLess(0.3+0.5*Util.EPSILON, 0.3));
    assertFalse(Util.isLess(0.3+2.0*Util.EPSILON, 0.3));
    assertTrue (Util.isLessOrEquals(0.3+0.5*Util.EPSILON, 0.3));
    assertFalse(Util.isLessOrEquals(0.3+2.0*Util.EPSILON, 0.3));
  }
  @Test
  public void testRandom() {
    for (int i=0; i<100; i++) {
      double x=Util.nextRandom(i,i*i);
      assertTrue (Util.isLessOrEquals(i,x));
      assertTrue (Util.isLessOrEquals(x,i*i));
    }
  }
}