public void PetOwnerService_GetAllPetOwnersAsync_AGLServiceReturnsValidData()
        {
            httpClient.GetStringAsync("people.json").Returns(data);
            _petOwnerService = new PetOwnerService(httpClient);
            var result = _petOwnerService.GetAllPetOwnersAsync().Result;

            Assert.NotEmpty(result as List <Owner>);
            Assert.Equal(6, (result as List <Owner>).Count);
        }
        public void PetOwnerService_GetAllPetOwnersAsync_AGLServiceReturnsNull()
        {
            string str = null;

            httpClient.GetStringAsync("people.json").Returns(str);
            _petOwnerService = new PetOwnerService(httpClient);
            var result = _petOwnerService.GetAllPetOwnersAsync().Result;

            Assert.Null(result);
        }