    @Test
    public void testGetAllRegions() {


        var region1 = new RegionEntity();
        region1.setRegionId(1);
        region1.setRegionName("地域1");
        region1.setCreationTimestamp(LocalDateTime.now());

        var region2 = new RegionEntity();
        region2.setRegionId(2);
        region2.setRegionName("地域2");
        region2.setCreationTimestamp(LocalDateTime.now());

        var regionList = List.of(region1, region2);

        given(repository.findAll()).willReturn(regionList);
        var result = api.getAllRegions();
        assertThat(result.getRegionList()).hasSize(2);
    }