[Test] //order verification
public void ShouldCopyDataFromSourceToDestinationMultipleTimes()
{
//GIVEN
var copyOperation = new CopyOperation();
var destination = Substitute.For <IDataDestination>();
var source = Substitute.For <IDataSource>();
var data1 = Any.Instance <Data>();
var data2 = Any.Instance <Data>();
source.RetrieveData().Returns(data1, data2);
//WHEN
copyOperation.ApplyTo(source, destination);
copyOperation.ApplyTo(source, destination);
//THEN
Received.InOrder(() =>
{
destination.Save(data1);
destination.Save(data2);
});
}
public void ShouldCopyDataFromSourceToDestination()
{
//GIVEN
var copyOperation = new CopyOperation();
var destination = Substitute.For <IDataDestination>();
var source = Substitute.For <IDataSource>();
var data = Any.Instance <Data>();
source.RetrieveData().Returns(data);
//WHEN
copyOperation.ApplyTo(source, destination);
//THEN
destination.Received(1).Save(data);
//destination.Received().Save(data);
}
public void ShouldThrowExceptionWhenSavingToDestinationThrowsException()
{
//GIVEN
var copyOperation = new CopyOperation();
var destination = Substitute.For <IDataDestination>();
var source = Substitute.For <IDataSource>();
var data = Any.Instance <Data>();
var exception = Any.Exception();
source.RetrieveData().Returns(data);
destination.When(d => d.Save(data)).Throw(exception);
//WHEN - THEN
var thrownException = Assert.Throws <Exception>(
() => copyOperation.ApplyTo(source, destination));
Assert.AreEqual(exception, thrownException);
}
public void ShouldThrowExceptionWhenReadingFromSourceThrowsException()
{
//GIVEN
var copyOperation = new CopyOperation();
var destination = Substitute.For <IDataDestination>();
var source = Substitute.For <IDataSource>();
var exception = Any.Exception();
source.RetrieveData().Throws(exception);
//WHEN - THEN
var e = Assert.Throws <Exception>(
() => copyOperation.ApplyTo(source, destination));
Assert.AreEqual(exception, e);
//never verification
destination.DidNotReceive().Save(Arg.Any <Data>());
}