How to Mock repository calls ATG - mockito

Question

Can we use Mockito to write tests for methods which implements repository calls? For example below method is using Named query to get eBooks from a Book Repository -
public RepositoryItem[] getEBooks(DynamoHttpServletRequest request) {
RepositoryItem[] results = null;
Repository rep = (Repository) request.resolveName("/atg/products/BookRepository");
try {
RepositoryItemDescriptor desc = rep.getItemDescriptor("Book");
RepositoryView view = desc.getRepositoryView();
if (view instanceof NamedQueryView) {
NamedQueryView nameView = (NamedQueryView) view;
ParameterSupportView pSupportView = (ParameterSupportView) view;
String queryName = "GetBooks";
Query namedQuery = nameView.getNamedQuery(queryName);
Object[] params = { "ebook" }; //book type
results = pSupportView.executeQuery(namedQuery, params);
}
} catch (RepositoryException e) {
logError(e.getMessage());
}
return results;
}
Thanks.

Answer 1

Yes you can. The question is though are you testing YOUR code or ATG in this instance?
Assuming your method above is contained in a class called GetBooks your test could look something like this:
#InjectMocks private GetBooks testObj;
#Mock private DynamoHttpServletRequest requestMock;
#Mock private Repository bookRepositoryMock;
#Mock private RepositoryItemDescriptor bookRepositoryItemDescriptorMock;
#Mock private GSAView bookRepositoryViewMock; //The only oddity here but GSAView is the common denominator for NamedQueryView and ParameterSupportView
#Mock private Query namedQueryMock;
#Mock private RepositoryItem resultRepositoryItem1, resultRepositoryItem2;
#BeforeMethod(groups = { "unit" })
public void setup() throws Exception {
testObj = new GetBooks();
MockitoAnnotations.initMocks(this);
Mockito.when(requestMock.resolveName("/atg/products/BookRepository")).thenReturn(bookRepositoryMock);
Mockito.when(bookRepositoryMock.getItemDescriptor("Book")).thenReturn(bookRepositoryItemDescriptorMock);
Mockito.when(bookRepositoryItemDescriptorMock.getRepositoryView()).thenReturn(bookRepositoryViewMock);
Mockito.when(bookRepositoryViewMock.getNamedQuery("GetBooks")).thenReturn(namedQueryMock);
List<RepositoryItem> resultArrayList = new ArrayList<RepositoryItem>();
resultArrayList.add(resultRepositoryItem1);
resultArrayList.add(resultRepositoryItem2);
Object[] params = { "ebook" }; //It may be simpler to test if this was a constant
Mockito.when(bookRepositoryViewMock.executeQuery(namedQueryMock, params)).thenReturn(resultArrayList.toArray(new RepositoryItem[resultArrayList.size()]));
}
#Test(groups = { "unit" })
public void testGetEBooks()throws Exception{
RepositoryItem[] result = testObj.getEBooks(requestMock);
Assert.assertTrue(result.length == 2); //What do you want to test?
}
This gives a greenbar when executed via TestNG. But what are you really testing here?
On a separate note. You should really use (protected) constants more since you'll then be able to use them in the package scope of your Mockito tests.