public void CalculateSuggestedPriceTest()
{
var currentProduct = new Collections(1, "Saw", "");
currentProduct.Cost = 50m;
var expected = new OperationResult <decimal>(55m, "");
var actual = currentProduct.CalculateSuggestedPrice(10m);
Assert.AreEqual(expected.Result, actual.Result);
Assert.AreEqual(expected.Message, actual.Message);
}