CoinChangeTest.java

import org.example.problems.coin_change.Solution;
import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.Arguments;
import org.junit.jupiter.params.provider.MethodSource;

import java.util.stream.Stream;

public class CoinChangeTest {
 private static Stream<Arguments> provideCases() {
 return Stream.of(
 Arguments.of(new int[]{1,2,5}, 11, 3),
 Arguments.of(new int[]{2}, 3, -1),
 Arguments.of(new int[]{1}, 0, 0)
 );
 }

 @ParameterizedTest
 @MethodSource("provideCases")
 public void test(int[] coins, int amount, int expected) {
 Solution s = new Solution();
 Assertions.assertSame(expected, s.coinChange(coins, amount));
 }
}