SumOfOddNumbersTest.java

packagecom.thealgorithms.maths;

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

importjava.util.stream.Stream;
importorg.junit.jupiter.api.Assertions;
importorg.junit.jupiter.api.Test;
importorg.junit.jupiter.params.ParameterizedTest;
importorg.junit.jupiter.params.provider.Arguments;
importorg.junit.jupiter.params.provider.MethodSource;

publicclassSumOfOddNumbersTest {

@ParameterizedTest
@MethodSource("inputStream")
voidsumOfFirstNOddNumbersTests(intexpected, intinput) {
Assertions.assertEquals(expected, SumOfOddNumbers.sumOfFirstNOddNumbers(input));
 }

privatestaticStream<Arguments> inputStream() {
returnStream.of(Arguments.of(1, 1), Arguments.of(4, 2), Arguments.of(9, 3), Arguments.of(16, 4), Arguments.of(25, 5), Arguments.of(100, 10));
 }

@Test
publicvoidtestSumOfFirstNOddNumbersThrowsExceptionForNegativeInput() {
assertThrows(IllegalArgumentException.class, () -> SumOfOddNumbers.sumOfFirstNOddNumbers(-1));
 }
}