Junit5 ParameterizedTest 를 이용해보았습니다.

    @ParameterizedTest
    @MethodSource("paramsForTestFree")
    public void testFree(int basePrice, int maxPrice, boolean isFree) {
        // given
        Event event = Event.builder()
                .basePrice(basePrice)
                .maxPrice(maxPrice)
                .build();

        // when
        event.update();

        // then
        assertThat(event.isFree()).isEqualTo(isFree);
    }

    @ParameterizedTest
    @MethodSource("paramsForTestOffline")
    void testOffline(String location, boolean isOffline) {
        // given
        Event event = Event.builder()
                .location(location)
                .build();

        // when
        event.update();

        // then
        assertThat(event.isOffline()).isEqualTo(isOffline);
    }

    private static Stream<Arguments> paramsForTestFree() { // argument source method
        return Stream.of(
                Arguments.of(0,0, true),
                Arguments.of(100, 0, false),
                Arguments.of(0, 100, false),
                Arguments.of(100, 200, false)
        );
    }

    private static Stream<Arguments> paramsForTestOffline() { // argument source method
        return Stream.of(
                Arguments.of("강남", true),
                Arguments.of(null, false),
                Arguments.of("        ", false)
        );
    }

JUNIT5를 이용하시는분들에게 도움이 되었으면 좋겠습니다.