CombinationsTest.java

packagecom.thealgorithms.maths;

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

importorg.junit.jupiter.api.Test;

publicclassCombinationsTest {

@Test
voidtestCombination() {
assertEquals(1, Combinations.combinations(1, 1));
assertEquals(252, Combinations.combinations(10, 5));
assertEquals(20, Combinations.combinations(6, 3));
assertEquals(15504, Combinations.combinations(20, 5));
 }

@Test
voidtestCombinationOptimised() {
assertEquals(100, Combinations.combinationsOptimized(100, 1));
assertEquals(1, Combinations.combinationsOptimized(1, 1));
assertEquals(252, Combinations.combinationsOptimized(10, 5));
assertEquals(20, Combinations.combinationsOptimized(6, 3));
assertEquals(15504, Combinations.combinationsOptimized(20, 5));
assertEquals(2535650040L, Combinations.combinationsOptimized(200, 5));
 }
}