ReverseNumberTest.java

packagecom.thealgorithms.maths;

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

importorg.junit.jupiter.params.ParameterizedTest;
importorg.junit.jupiter.params.provider.CsvSource;
importorg.junit.jupiter.params.provider.ValueSource;

publicclassReverseNumberTest {

@ParameterizedTest
@CsvSource({"0, 0", "1, 1", "10, 1", "123, 321", "7890, 987"})
publicvoidtestReverseNumber(intinput, intexpected) {
assertEquals(expected, ReverseNumber.reverseNumber(input));
 }

@ParameterizedTest
@ValueSource(ints = {-1, -123, -7890})
publicvoidtestReverseNumberThrowsExceptionForNegativeInput(intinput) {
assertThrows(IllegalArgumentException.class, () -> ReverseNumber.reverseNumber(input));
 }
}