Hi,
I am testing this piece of code
internal class QueryProcessor
{
private readonly ITokenizer _tokenizer;
public QueryProcessor(ITokenizer tokenizer)
{
_tokenizer = tokenizer;
}
public IList<IDocument> SearchFor(string query, IIndex index)
{
IList<string> tokens = _tokenizer.Tokenize(query);
foreach (string token in tokens)
{
index.GetPostings(token);
}
return null;
}
}
This is the test I am interested in:
[Test]
public void Query_ShouldBeTokenized()
{
// arrange
string query = "some query";
ITokenizer tokenizerMock =
MockRepository.GenerateMock<ITokenizer>();
tokenizerMock.Expect(x => x.Tokenize(query)).Return(new
List<string>());
// act
var target = new QueryProcessor(tokenizerMock);
target.SearchFor(query, Dummies.Create<IIndex>());
// assert
tokenizerMock.VerifyAllExpectations();
}
I want to be sure that the query is tokenized. Because later the tokens must
be used I have to explicitly say what the return value is. Otherwise when
tokens.GetEnumerator is called in the production code it will result in a
null reference exception.
But how can this be achieved with the new AAA syntax?
When I remove the Expect in the arrange and in the assert instead of
VerifyAllExpectation I say:
tokenizerMock.AssertWasCalled(x => x.Tokenize(query), call =>
call.Return(new List<string>()));
it compiles just fine but the not-null list is not returned.
--
Software modules coupling is the path to the dark side.
Coupling leads to complexity.
Complexity leads to confusion.
Confusion leads to suffering.
Once you start down the dark path, forever will it dominate your destiny,
consume you it will!
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