public void Alerter_GetTodaysEvents_TestableDateTimeWorks()
{
// configure the test. Our test will pretend that today is 4th May 2020
TestableDateTimeSource dateTimeSource = new TestableDateTimeSource(new DateTime(2020, 5, 4, 0, 0, 0, DateTimeKind.Local));
// inject the TestableDateTimeSource into the business object
Alerter alerter = new Alerter(dateTimeSource);
// add 4 events, two of which will be on the day of interest
alerter.AddEvent(new AlertableEvent()
{
When = new DateTime(1066, 9, 28, 0, 0, 0, DateTimeKind.Local), Description = "William lands"
});
alerter.AddEvent(new AlertableEvent()
{
When = new DateTime(1215, 6, 15, 0, 0, 0, DateTimeKind.Local), Description = "Magna carta agreed"
});
alerter.AddEvent(new AlertableEvent()
{
When = new DateTime(2020, 5, 4, 18, 10, 0, DateTimeKind.Local), Description = "I am writing this test"
});
alerter.AddEvent(new AlertableEvent()
{
When = new DateTime(2020, 5, 4, 19, 0, 0, DateTimeKind.Local), Description = "I will start dinner"
});
// call the function under test
var events = alerter.GetTodaysEvents();
// we expect to find 2 events for the 4th May 2020
Assert.AreEqual(2, events.Count);
}
public void TestableDateTimeSource_Now_IsCorect()
{
DateTime dtLocal = new DateTime(2020, 4, 11, 10, 30, 45, DateTimeKind.Local);
TestableDateTimeSource src = new TestableDateTimeSource(dtLocal);
Assert.AreEqual(dtLocal, src.Now);
}
public void TestableDateTimeSource_UtcNow_IsCorect()
{
DateTime dtUtc = new DateTime(2020, 4, 11, 10, 30, 45, DateTimeKind.Utc);
TestableDateTimeSource src = new TestableDateTimeSource(dtUtc);
Assert.AreEqual(dtUtc, src.UtcNow);
}
public void TestableDateTimeSource_Ctor_ConvertsUtcToLocal()
{
DateTime dtUtc = new DateTime(2020, 4, 11, 10, 30, 45, DateTimeKind.Utc);
DateTime dtLocal = dtUtc.ToLocalTime();
TestableDateTimeSource src = new TestableDateTimeSource(dtUtc);
Assert.AreEqual(dtLocal, src.Now);
}
public void TestableDateTimeSource_Ctor_ConvertsLocalToUtc()
{
DateTime dtLocal = new DateTime(2020, 4, 11, 10, 30, 45, DateTimeKind.Local);
DateTime dtUtc = dtLocal.ToUniversalTime();
TestableDateTimeSource src = new TestableDateTimeSource(dtLocal);
Assert.AreEqual(dtUtc, src.UtcNow);
}