public void TransferFundsFromEurAmount_MockFramework_ShouldWork()
{
//arrange
var source = new Account(200);
var destination = new Account(150);
var rateEurRon = 4.4F;
var convertorMock = new Mock <ICurrencyConvertor>();
convertorMock.Setup(_ => _.EurToRon(20)).Returns(20 * rateEurRon); // set mock to act as a TestDouble Stub - gives IndirectInputs to the SUT
//act
source.TransferFundsFromEurAmount(destination, 20.00F, convertorMock.Object);
//assert
Assert.AreEqual(150.00F + 20 * rateEurRon, destination.Balance);
Assert.AreEqual(200.00F - 20 * rateEurRon, source.Balance);
convertorMock.Verify(_ => _.EurToRon(20), Times.Once()); //verify behavior
}