Testing Fibonacci Number modulo M

FibonacciHugeTest.java

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertTrue;

import java.util.concurrent.TimeUnit;
import org.junit.jupiter.api.Test;

class FibonacciHugeTest {
  @Test
  void getPisanoPeriod() {
    assertEquals(8, FibonacciHuge.getPisanoPeriod(3));
  }

  @Test
  void getFibonacciHugeFastTest() {
    assertEquals(44, FibonacciHuge.getFibonacciHugeFast(438, 900));
  }

  @Test
  void getFibonacciHugeFastTest2() {
    assertEquals(185, FibonacciHuge.getFibonacciHugeFast(1548276540, 235));
  }

  @Test
  void getFibonacciHugeFastTest3() {
    assertEquals(15075, FibonacciHuge.getFibonacciHugeFast(100, 100000));
  }

  @Test
  void getFibonacciHugeFastTest4() {
    assertEquals(11963, FibonacciHuge.getFibonacciHugeFast(281621358815590L, 30524));
  }

  @Test
  void stressTest() {
    for (int i = 0; i < 1000; i++) {

      long randNo1 = CustomTestGenerator.getRandomInt(1, 10000);
      long randNo2 = CustomTestGenerator.getRandomInt(2, 10000);

      System.out.print(randNo1 + ", " + randNo2);

      long startTimeFast = System.nanoTime();
      long fastResult = FibonacciHuge.getFibonacciHugeFast(randNo1, randNo2);
      long stopTimeFast = System.nanoTime();
      long elapsedTimeFast = stopTimeFast - startTimeFast;
      long elapsedFastSec = TimeUnit.SECONDS.convert(elapsedTimeFast, TimeUnit.NANOSECONDS);

      System.out.print(" -> " + elapsedFastSec + " s : " + fastResult);

      long startTimeNaive = System.nanoTime();
      long slowResult = FibonacciHuge.getFibonacciHugeNaive(randNo1, randNo2);
      long stopTimeNaive = System.nanoTime();
      long elapsedTimeNaive = stopTimeNaive - startTimeNaive;
      long elapsedNaiveSec = TimeUnit.SECONDS.convert(elapsedTimeNaive, TimeUnit.NANOSECONDS);

      System.out.print(" === " + slowResult + " : " + elapsedNaiveSec + " s");
      System.out.println();

      assertEquals(slowResult, fastResult);
      assertTrue(elapsedFastSec < 2);
    }
  }
}