public void GetAll_ReturnsAnEmptyList_WhenThereAreNoCountries()
        {
            // Arrange
            var countries = new List <Country>().AsQueryable();

            var countryMockDbSet = new Mock <DbSet <Country> >();

            countryMockDbSet.As <IQueryable <Country> >().Setup(m => m.Provider).Returns(countries.Provider);
            countryMockDbSet.As <IQueryable <Country> >().Setup(m => m.Expression).Returns(countries.Expression);
            countryMockDbSet.As <IQueryable <Country> >().Setup(m => m.ElementType).Returns(countries.ElementType);
            countryMockDbSet.As <IQueryable <Country> >().Setup(m => m.GetEnumerator()).Returns(countries.GetEnumerator());

            var mockContext = new Mock <EazyCartContext>();

            mockContext.Setup(c => c.Countries).Returns(countryMockDbSet.Object);

            var countryBusiness = new CountryBusiness(mockContext.Object);

            // Act
            var allCountries = countryBusiness.GetAll();

            // Assert
            int expectedCount = 0;

            Assert.AreEqual(expectedCount, allCountries.Count, "List of all countries is not empty");
        }
        public void GetAll_ReturnsACorrectListOfCountries_WhenThereAreCountries()
        {
            // Arrange
            var countries = new List <Country>
            {
                new Country {
                    Name = "TestCountry1", Id = 1
                },
                new Country {
                    Name = "TestCountry2", Id = 2
                },
                new Country {
                    Name = "TestCountry3", Id = 3
                },
            }.AsQueryable();

            var countryMockDbSet = new Mock <DbSet <Country> >();

            countryMockDbSet.As <IQueryable <Country> >().Setup(m => m.Provider).Returns(countries.Provider);
            countryMockDbSet.As <IQueryable <Country> >().Setup(m => m.Expression).Returns(countries.Expression);
            countryMockDbSet.As <IQueryable <Country> >().Setup(m => m.ElementType).Returns(countries.ElementType);
            countryMockDbSet.As <IQueryable <Country> >().Setup(m => m.GetEnumerator()).Returns(countries.GetEnumerator());

            var mockContext = new Mock <EazyCartContext>();

            mockContext.Setup(c => c.Countries).Returns(countryMockDbSet.Object);

            var countryBusiness = new CountryBusiness(mockContext.Object);

            // Act
            var allCountries = countryBusiness.GetAll();

            // Assert
            string expectedFirstCountryName  = "TestCountry1";
            string expectedSecondCountryName = "TestCountry2";
            string expectedThirdCountryName  = "TestCountry3";

            Assert.AreEqual(expectedFirstCountryName, allCountries[0].Name, "First names do not match.");
            Assert.AreEqual(expectedSecondCountryName, allCountries[1].Name, "Second names do not match.");
            Assert.AreEqual(expectedThirdCountryName, allCountries[2].Name, "Third names do not match");
        }