public void PaymentAllLawCasesIdTest()
        {
            var optionBuilder = new DbContextOptionsBuilder <ApplicationDbContext>()
                                .UseInMemoryDatabase("testDb");
            var dbContext = new ApplicationDbContext(optionBuilder.Options);
            var service   = new PaymentsService(dbContext);

            var result = service.AllLawCasesId();

            Assert.NotNull(result);
        }