public void Should_return_900_for_Health_Increase_when_Income_is_10_000_CZK() { IEnginesHistory <ITaxingEngine> engines = TaxingEnginesHistory.CreateEngines(); ITaxingEngine engine = engines.ResolveEngine(testPeriod); bool testWithholdTaxing = true; decimal testIncome = 10000m; decimal resultValue = engine.WithholdTaxableHealth(testPeriod, testWithholdTaxing, testIncome); Assert.AreEqual(900m, resultValue); }