public void EmptyCase()
{
var selector = new SelectorByCountryAndAge();
var source = GenerateStorage;
var result = selector.Get(source, "JPN", 20);
Assert.Empty(result);
}
public void CommonCase()
{
var selector = new SelectorByCountryAndAge();
var source = GenerateStorage;
var result = selector.Get(source, "USA", 20);
Assert.True(result.SequenceEqual(source.Where(e => e.Country == "USA" && e.Age == 20)));
}