[Fact] // async Task<IEnumerable<CountryListServiceModel>> AllCountriesAsync()
public async void AllCountriesAsync_ShouldReturnModelColletionOfAllCountriesInDatabase()
{
var country = CountryCreator.Create();
var country2 = CountryCreator.Create();
var country3 = CountryCreator.Create();
var country4 = CountryCreator.Create();
await this.Context.Countries.AddRangeAsync(country, country2, country3, country4);
await this.Context.SaveChangesAsync();
var service = new CountryService(this.Context);
// Act
var result = await service.AllCountriesAsync();
// Assert
result.Should().AllBeOfType <CountryListServiceModel>();
result.Should().HaveCount(4);
}