public void LastObservedQuote_WrongObservationIndex_Throws(SyncTickers sut,int observationIndex)
{
Assert.Throws<ArgumentException>(() => sut.LastObservedQuote(0, observationIndex));
}
public void LastObservedQuote_WrongTickerIndex_Throws(SyncTickers sut, int tickerIndex)
{
Assert.Throws<ArgumentException>(() => sut.LastObservedQuote(tickerIndex,0));
}
public void LastObservedQuote_ReturnsCorrectData(
SyncTickers sut,
int tickerIndex,
int observationIndex,
IReadOnlyList<ISimpleTickerQuote> expected)
{
Assert.Equal<ISimpleTickerQuote>(expected.LastOrDefault(), sut.LastObservedQuote(tickerIndex, observationIndex));
}