public void GetBy_ShouldReturnANotification_KeyExists()
{
_sut = new Notifier();
_sut.AddNotification(new("key", "value"));
Assert.NotNull(_sut.GetBy(x => x.Key == "key").First());
}
public void GetBy_ShouldReturnNull_KeyNotExists()
{
_sut = new Notifier();
Assert.Null(_sut.GetBy(x => x.Key == "key"));
}
public void GetBy_MustThrowArgumentException_KeyIsNullOrEmpty()
{
_sut = new Notifier();
Assert.Throws <ArgumentException>(() => _sut.GetBy(null));
}
