package Fibonacci2;

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

/**
* Test suite for a simple Fibonacci number calculator; requires
* Junit 4.x.
*
* @author Wayne Eberly
*/

public class FibTest {

   /*
   * Simple Tests
   */

   private void simpleTest( int i ) throws NumericalOverflowException {
     System.out.print("Testing value at ");
     System.out.printf("%2d", i);
     System.out.println("");
     assertEquals(Fibonacci.fib(i), SFibonacci.fib(i));
   };

   /*
   * Initial tests check that the method returns the
   * expected values at inputs 0-10
   */


   @Test
   public void testZero () throws NumericalOverflowException {
     simpleTest(0);
   }

   @Test
   public void testOne () throws NumericalOverflowException {
     simpleTest(1);
   }

   @Test
   public void testTwo () throws NumericalOverflowException {
     simpleTest(2);
   }

   @Test
   public void testThree () throws NumericalOverflowException {
     simpleTest(3);
   }

   @Test
   public void testFour () throws NumericalOverflowException {
     simpleTest(4);
   }

   @Test
   public void testFive () throws NumericalOverflowException {
     simpleTest(5);
   }

   @Test
   public void testSix () throws NumericalOverflowException {
     simpleTest(6);
   }

   @Test
   public void testSeven () throws NumericalOverflowException {
     simpleTest(7);
   }

   @Test
   public void testEight () throws NumericalOverflowException {
     simpleTest(8);
   }

   @Test
   public void testNine () throws NumericalOverflowException {
     simpleTest(9);
   };

   @Test
   public void testTen () throws NumericalOverflowException {
     simpleTest(10);
   }
 
 /*
 * This next test checks whether the method throws
 * the expected exception when on input -1
 */

 @Test (expected = IllegalArgumentException.class)
 public void testNegative () throws NumericalOverflowException {
   System.out.println("Testing evaluation at -1");
   Fibonacci.fib(-1);
 }

  /*
  * The final set of tests check whether the method
  * behaves as expected in the region where
  * numerical overflow would be expected to
  * occur
  */

  private void longTest ( int i, String s ) throws NumericalOverflowException {
    System.out.print("Testing evaluation at ");
    System.out.printf("%2d", i);
    System.out.println("");
    Long value = new Long(Fibonacci.fib(i));
    Long target = new Long(s);
    assertTrue(value.equals(target));
  }

  @Test
  public void TestNinety () throws NumericalOverflowException {
    longTest(90, "2880067194370816120");
  }

  @Test (expected = NumericalOverflowException.class)
  public void TestNinetyFive () throws NumericalOverflowException {
    System.out.println("Testing evaluation at 95:");
    Fibonacci.fib(95);
  }


}