public void First_WhenInfoCollectionIsEmpty_ReturnsNull()
{
IInfoCollection <ICreditInfo, Sut> sut = CreateSut();
IInfo <ICreditInfo> result = sut.First();
Assert.That(result, Is.Null);
}
public void First_WhenInfoCollectionContainsOneInfoElement_ReturnsOldestInfoElement()
{
IInfoCollection <ICreditInfo, Sut> sut = CreateSut();
DateTime infoOffset = new DateTime(DateTime.Today.Year, DateTime.Today.Month, 1);
sut.Add(_fixture.BuildCreditInfoMock(infoOffset).Object);
IInfo <ICreditInfo> result = sut.First();
Assert.That(result.Year == infoOffset.Year && result.Month == infoOffset.Month, Is.True);
}
public void Prev_WhenInfoCollectionDoesNotContainPreviousInfoElement_ReturnsNull()
{
IInfoCollection <ICreditInfo, Sut> sut = CreateSut();
DateTime infoOffset = new DateTime(DateTime.Today.Year, DateTime.Today.Month, 1);
sut.Add(_fixture.BuildCreditInfoMock(infoOffset).Object);
sut.Add(_fixture.BuildCreditInfoMock(infoOffset.AddMonths(-1)).Object);
sut.Add(_fixture.BuildCreditInfoMock(infoOffset.AddMonths(-2)).Object);
IInfo <ICreditInfo> result = sut.Prev(sut.First());
Assert.That(result, Is.Null);
}