DatesTest.java

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.time.LocalDate;
import java.util.stream.Stream;

import static org.junit.jupiter.params.provider.Arguments.arguments;

public class DatesTest {

    private static Stream<Arguments> data() {
        return Stream.of(
                arguments(Dates.yyyy_MM_dd, "2022-03-30"),
                arguments(Dates.MMM_dd_yyyy, "Mar 30, 2022")
        );
    }

    @ParameterizedTest
    @MethodSource("data")
    public void parse(final Dates dateEnum, final String dateString) {

        final LocalDate expected = LocalDate.of(2022, 3, 30);
        final LocalDate actual = dateEnum.parse(dateString);

        Assertions.assertEquals(expected, actual);
    }

    @ParameterizedTest
    @MethodSource("data")
    public void format(final Dates dateEnum, final String expected) {

        final LocalDate date = LocalDate.of(2022, 3, 30);
        final String actual = dateEnum.format(date);

        Assertions.assertEquals(expected, actual);
    }

}