Java/src/test/java/com/thealgorithms/maths/LeonardoNumberTest.java at master · TheAlgorithms/Java · GitHub

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packagecom.thealgorithms.maths;

importorg.junit.jupiter.api.Assertions;
importorg.junit.jupiter.api.Test;

/**
 * Test cases for {@link LeonardoNumber} class.
 * <p>
 * Tests both recursive and iterative implementations with various input values
 * including edge cases and boundary conditions.
 */
classLeonardoNumberTest {

// Tests for recursive implementation

@Test
voidtestLeonardoNumberNegative() {
Assertions.assertThrows(IllegalArgumentException.class, () -> LeonardoNumber.leonardoNumber(-1));
 }

@Test
voidtestLeonardoNumberNegativeLarge() {
Assertions.assertThrows(IllegalArgumentException.class, () -> LeonardoNumber.leonardoNumber(-100));
 }

@Test
voidtestLeonardoNumberZero() {
Assertions.assertEquals(1, LeonardoNumber.leonardoNumber(0));
 }

@Test
voidtestLeonardoNumberOne() {
Assertions.assertEquals(1, LeonardoNumber.leonardoNumber(1));
 }

@Test
voidtestLeonardoNumberTwo() {
Assertions.assertEquals(3, LeonardoNumber.leonardoNumber(2));
 }

@Test
voidtestLeonardoNumberThree() {
Assertions.assertEquals(5, LeonardoNumber.leonardoNumber(3));
 }

@Test
voidtestLeonardoNumberFour() {
Assertions.assertEquals(9, LeonardoNumber.leonardoNumber(4));
 }

@Test
voidtestLeonardoNumberFive() {
Assertions.assertEquals(15, LeonardoNumber.leonardoNumber(5));
 }

@Test
voidtestLeonardoNumberSix() {
Assertions.assertEquals(25, LeonardoNumber.leonardoNumber(6));
 }

@Test
voidtestLeonardoNumberSeven() {
Assertions.assertEquals(41, LeonardoNumber.leonardoNumber(7));
 }

@Test
voidtestLeonardoNumberEight() {
Assertions.assertEquals(67, LeonardoNumber.leonardoNumber(8));
 }

@Test
voidtestLeonardoNumberTen() {
Assertions.assertEquals(177, LeonardoNumber.leonardoNumber(10));
 }

@Test
voidtestLeonardoNumberFifteen() {
Assertions.assertEquals(1973, LeonardoNumber.leonardoNumber(15));
 }

@Test
voidtestLeonardoNumberTwenty() {
Assertions.assertEquals(21891, LeonardoNumber.leonardoNumber(20));
 }

// Tests for iterative implementation

@Test
voidtestLeonardoNumberIterativeNegative() {
Assertions.assertThrows(IllegalArgumentException.class, () -> LeonardoNumber.leonardoNumberIterative(-1));
 }

@Test
voidtestLeonardoNumberIterativeNegativeLarge() {
Assertions.assertThrows(IllegalArgumentException.class, () -> LeonardoNumber.leonardoNumberIterative(-50));
 }

@Test
voidtestLeonardoNumberIterativeZero() {
Assertions.assertEquals(1, LeonardoNumber.leonardoNumberIterative(0));
 }

@Test
voidtestLeonardoNumberIterativeOne() {
Assertions.assertEquals(1, LeonardoNumber.leonardoNumberIterative(1));
 }

@Test
voidtestLeonardoNumberIterativeTwo() {
Assertions.assertEquals(3, LeonardoNumber.leonardoNumberIterative(2));
 }

@Test
voidtestLeonardoNumberIterativeThree() {
Assertions.assertEquals(5, LeonardoNumber.leonardoNumberIterative(3));
 }

@Test
voidtestLeonardoNumberIterativeFour() {
Assertions.assertEquals(9, LeonardoNumber.leonardoNumberIterative(4));
 }

@Test
voidtestLeonardoNumberIterativeFive() {
Assertions.assertEquals(15, LeonardoNumber.leonardoNumberIterative(5));
 }

@Test
voidtestLeonardoNumberIterativeSix() {
Assertions.assertEquals(25, LeonardoNumber.leonardoNumberIterative(6));
 }

@Test
voidtestLeonardoNumberIterativeSeven() {
Assertions.assertEquals(41, LeonardoNumber.leonardoNumberIterative(7));
 }

@Test
voidtestLeonardoNumberIterativeEight() {
Assertions.assertEquals(67, LeonardoNumber.leonardoNumberIterative(8));
 }

@Test
voidtestLeonardoNumberIterativeTen() {
Assertions.assertEquals(177, LeonardoNumber.leonardoNumberIterative(10));
 }

@Test
voidtestLeonardoNumberIterativeFifteen() {
Assertions.assertEquals(1973, LeonardoNumber.leonardoNumberIterative(15));
 }

@Test
voidtestLeonardoNumberIterativeTwenty() {
Assertions.assertEquals(21891, LeonardoNumber.leonardoNumberIterative(20));
 }

@Test
voidtestLeonardoNumberIterativeTwentyFive() {
Assertions.assertEquals(242785, LeonardoNumber.leonardoNumberIterative(25));
 }

// Consistency tests between recursive and iterative implementations

@Test
voidtestConsistencyBetweenImplementations() {
for (inti = 0; i <= 15; i++) {
Assertions.assertEquals(LeonardoNumber.leonardoNumber(i), LeonardoNumber.leonardoNumberIterative(i), "Mismatch at index " + i);
 }
 }
}