public void CommonCase()
{
var source = GenerateStorage;
var singleAverageGetter = new SingleAverageGetter(new AverageKeeperFactory(), new SelectorByCountryAndAge());
var age = 20;
var country = "USA";
var average = 4000;
var selectorByCountryAndAgeMock = new SelectorByCountryAndAgeMock();
var grossSalaryAverageSetter = new GrossSalaryAverageSetter(selectorByCountryAndAgeMock);
var result = grossSalaryAverageSetter.SetAverage(source, age, country, average);
Assert.Equal(average, singleAverageGetter.Calculate(result.ToList(), age, country));
Assert.Equal(1, selectorByCountryAndAgeMock.CountOfCalling);
Assert.True(result.SequenceEqual(selectorByCountryAndAgeMock.CopyOfLastReturnedCollection));
}
public void EmptyCase()
{
var source = GenerateStorage;
var age = 25;
var country = "USA";
var average = 4000;
var selectorByCountryAndAgeMock = new SelectorByCountryAndAgeMock();
var grossSalaryAverageSetter = new GrossSalaryAverageSetter(selectorByCountryAndAgeMock);
var result = grossSalaryAverageSetter.SetAverage(source, age, country, average);
var checkStorage = GenerateStorage;
Assert.Equal(1, selectorByCountryAndAgeMock.CountOfCalling);
Assert.False(result.Any());
Func <Person, string> serializer = p => $"{p.Age} {p.Country} {p.Gender} {p.GrossSalary}";
Assert.True(checkStorage.Select(serializer).SequenceEqual(source.Select(serializer)));
}