public async Task GetFiremenByIdAsyncTest()
        {
            var firemen = new Firemen
            {
                Id           = 11,
                Name         = "Jan",
                Surname      = "Kowalski",
                Birthdate    = DateTime.Today,
                City         = "Kraków",
                DigitalCode  = "31-231",
                Son_Daughter = "Stefana",
                Street       = "Jasnogórska",
                Pesel        = "87542165874",
                Management   = true,
                HouseNumber  = "146B",
                Gender       = Gender.Male,
                Active       = true,
                Function     = "Kierowca",
                FlatNumber   = 5,
            };

            using (var context = new AppDbContext(options))
            {
                var firemenService = new FiremenService(context, userManager.Object, httpContextAccessor.Object);

                await firemenService.CreateFiremenAsync(firemen);

                var result = await firemenService.GetFiremenByIdAsync(11);

                Assert.IsNotNull(result);
                Assert.IsNotNull(result.Firemen);
            }
        }
        public void Throws_If_Firemen_Was_Not_Found_GetFiremenByIdAsyncId()
        {
            using (var context = new AppDbContext(options))
            {
                var firemenService = new FiremenService(context, userManager.Object, httpContextAccessor.Object);

                Assert.ThrowsAsync <Exception>(async() => await firemenService.GetFiremenByIdAsync(20));
            }
        }
        public void Throws_If_ID_Wont_Be_Greather_Than_Zero_GetFiremenByIdAsyncId(int id)
        {
            using (var context = new AppDbContext(options))
            {
                var firemenService = new FiremenService(context, userManager.Object, httpContextAccessor.Object);

                Assert.ThrowsAsync <ArgumentException>(async() => await firemenService.GetFiremenByIdAsync(id));
            }
        }