public void Should_return_Factor_Constants_for_Taxing_Engine_when_Year_2015() { IEnginesHistory <ITaxingEngine> engines = TaxingEnginesHistory.CreateEngines(); ITaxingEngine engine = engines.ResolveEngine(testPeriod); Assert.AreEqual(15.0m, engine.PeriodAdvancesFactor(testPeriod)); Assert.AreEqual(15.0m, engine.PeriodWithholdFactor(testPeriod)); Assert.AreEqual(7.0m, engine.PeriodSolidaryFactor(testPeriod)); }