public void ClearHistory_ShouldHaveNoResultsAfterClearHistory()
{
List <EquationCalculation> equations = EquationsToBeStored;
var calucaltorModel = new CalculatorModel();
foreach (EquationCalculation data in equations)
{
calucaltorModel.CalculateFromText(data.Equation);
}
calucaltorModel.ClearHistory();
Assert.Empty(calucaltorModel.Results);
}