public void WithinInterval_Expired(int secondsElapsed)
{
// Use NSubstitute to provide an implementation of IDateTimeServices.
var dateTimeServices = Substitute.For <System.Abstractions.IDateTimeServices>();
dateTimeServices.UtcNow.Returns(new DateTime(2020, 1, 1));
// Our timer that we want to test
var simpleTimer = new MyLib.SimpleTimer(
dateTimeServices: dateTimeServices,
interval: timerInterval);
// Update the mocked date time services so that a simulated interval
// of time has elapsed, less than the
dateTimeServices.UtcNow.Returns(
dateTimeServices.UtcNow +
TimeSpan.FromSeconds(secondsElapsed));
// FluentAssertions method of checking the Expired property
simpleTimer.Expired.Should().BeFalse();
// Standard XUnit test for comparison
Assert.False(simpleTimer.Expired);
}
public void AfterInterval_Expired(int secondsElapsed)
{
var dateTimeServices = Substitute.For <System.Abstractions.IDateTimeServices>();
dateTimeServices.UtcNow.Returns(new DateTime(2020, 1, 1));
var simpleTimer = new MyLib.SimpleTimer(
dateTimeServices: dateTimeServices,
interval: timerInterval);
dateTimeServices.UtcNow.Returns(
dateTimeServices.UtcNow +
TimeSpan.FromSeconds(secondsElapsed));
simpleTimer.Expired.Should().BeTrue();
}
