public void Counting_down_to_0___restarting()
{
_configMock
.Setup(c => c.StartSeconds)
.Returns(3)
.Verifiable();
CountDownViewModel sut = this.CreateSut();
_configMock.Verify();
sut.StartCommand.Execute(null);
Assert.AreEqual(3, sut.Seconds, "after Start");
Assert.AreEqual(State.Red, sut.State, "after Start");
_timer.OnTick(); // 2
_timer.OnTick(); // 1
_timer.OnTick(); // 0
_timer.OnTick(); // 3
Assert.AreEqual(3, sut.Seconds, "should have restarted");
Assert.AreEqual(State.Red, sut.State, "should have restarted");
}
