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Update Combinations.java and add test case (#3184)

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This commit is contained in:
Ankush Banik
2022-07-08 17:01:09 +05:30
committed by GitHub
parent 826b612d0d
commit f7bd7682ba
2 changed files with 30 additions and 17 deletions
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src/test/java/com/thealgorithms/maths/CombinationsTest.java Normal file
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package com.thealgorithms.maths;
import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.assertEquals;
public class CombinationsTest {
@Test
void testCombination() {
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
void testCombinationOptimised() {
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));
}
}