public void cancelLike() {
        if (this.likesCount > 0) {
            this.likesCount--;
        }
    }
@Test
    void review_공감수가_0이라면_공감수를_감소하지_않는다() {
        // given
        Review review = Review.builder().likesCount(0).build();

        // when
        review.cancelLike();

        // then
        assertEquals(review.getLikesCount(), 0);
    }