LeonardoNumberTest.java

packagecom.thealgorithms.maths;

importstaticorg.junit.jupiter.api.Assertions.assertEquals;
importstaticorg.junit.jupiter.api.Assertions.assertThrows;

importorg.junit.jupiter.api.Test;

publicclassLeonardoNumberTest {
@Test
voidleonardoNumberNegative() {
assertThrows(ArithmeticException.class, () -> LeonardoNumber.leonardoNumber(-1));
 }
@Test
voidleonardoNumberZero() {
assertEquals(1, LeonardoNumber.leonardoNumber(0));
 }
@Test
voidleonardoNumberOne() {
assertEquals(1, LeonardoNumber.leonardoNumber(1));
 }
@Test
voidleonardoNumberFive() {
assertEquals(15, LeonardoNumber.leonardoNumber(5));
 }
@Test
voidleonardoNumberTwenty() {
assertEquals(21891, LeonardoNumber.leonardoNumber(20));
 }
}