public async Task ApplyWhereClause_EmptyFilter_ReturnsNull()
{
var mockManager = new QueryMockManager();
var mapperMock = mockManager.ConfigureMapperMock <Vote, VoteDto, VoteFilterDto>();
var queryMock = mockManager.ConfigureQueryMock <Vote>();
var voteQueryObject = new VoteQueryObject(mapperMock.Object, queryMock.Object);
var filter = new VoteFilterDto();
var temp = await voteQueryObject.ExecuteQuery(filter);
Assert.AreEqual(null, mockManager.CapturedPredicate);
}
public async Task ApplyWhereClause_FilterByImageId_ReturnsCorrectSimplePredicate()
{
Guid filterImageId = Guid.NewGuid();
var mockManager = new QueryMockManager();
var expectedPredicate = new SimplePredicate(nameof(Vote.ImageId), ValueComparingOperator.Equal, filterImageId);
var mapperMock = mockManager.ConfigureMapperMock <Vote, VoteDto, VoteFilterDto>();
var queryMock = mockManager.ConfigureQueryMock <Vote>();
var voteQueryObject = new VoteQueryObject(mapperMock.Object, queryMock.Object);
var filter = new VoteFilterDto {
ImageId = filterImageId
};
var temp = await voteQueryObject.ExecuteQuery(filter);
Assert.AreEqual(expectedPredicate, mockManager.CapturedPredicate);
}
private IPredicate CreateCompositePredicateFromFilter(VoteFilterDto filter)
{
// either one of UserId or ImageId
if (filter.UserId != Guid.Empty && filter.ImageId == Guid.Empty)
{
return(new SimplePredicate(nameof(Vote.UserId), ValueComparingOperator.Equal, filter.UserId));
}
if (filter.ImageId != Guid.Empty && filter.UserId == Guid.Empty)
{
return(new SimplePredicate(nameof(Vote.ImageId), ValueComparingOperator.Equal, filter.ImageId));
}
// Or both
var predicates = new List <IPredicate>
{
new SimplePredicate(nameof(Vote.ImageId), ValueComparingOperator.Equal, filter.ImageId),
new SimplePredicate(nameof(Vote.UserId), ValueComparingOperator.Equal, filter.UserId)
};
return(new CompositePredicate(predicates, LogicalOperator.AND));
}
protected override IQuery <Vote> ApplyWhereClause(IQuery <Vote> query, VoteFilterDto filter)
{
return(filter.ImageId == Guid.Empty && filter.UserId == Guid.Empty ? query : query.Where(CreateCompositePredicateFromFilter(filter)));
}
