FibonacciTest.java

package com.examplehub.maths;

import static org.junit.jupiter.api.Assertions.*;

import org.junit.jupiter.api.Test;

class FibonacciTest {

  @Test
  void test() {

    try {
      FibonacciRecursion.fibonacci(-1);
      fail(); /* this will not happen */
    } catch (IllegalArgumentException e) {
      assertTrue(true); /* this wil happen */
    }

    assertEquals(0, Fibonacci.fibonacci(0));
    assertEquals(1, Fibonacci.fibonacci(1));
    assertEquals(1, Fibonacci.fibonacci(2));
    assertEquals(2, Fibonacci.fibonacci(3));
    assertEquals(3, Fibonacci.fibonacci(4));
    assertEquals(5, Fibonacci.fibonacci(5));
    assertEquals(8, Fibonacci.fibonacci(6));
    assertEquals(13, Fibonacci.fibonacci(7));
    assertEquals(144, Fibonacci.fibonacci(12));
  }
}