public void FirstAsync()
{
var queryEven = Enumerable.Range(0, 10).AsQueryable().Where(n => n % 2 == 0).AsQueryable();
var visitor = new EqualsToNotEqualsVisitor();
var queryOdd = queryEven.InterceptWith(visitor);
var task = queryOdd.FirstAsync(n => n > 5, CancellationToken.None);
task.ContinueWith(t => t.Result).Wait();
Assert.Equal(7, task.Result);
}
public void InterceptWith_TestEqualsToNotEqualsVisitor()
{
IQueryable <int> query = Enumerable.Range(0, 10).AsQueryable().Where(n => n % 2 == 0);
List <int> numbersEven = query.ToList();
Assert.Equal(new List <int> {
0, 2, 4, 6, 8
}, numbersEven);
var visitor = new EqualsToNotEqualsVisitor();
List <int> numbersOdd = query.InterceptWith(visitor).Where(x => x >= 0).ToList();
Assert.Equal(new List <int> {
1, 3, 5, 7, 9
}, numbersOdd);
}
public void InterceptWith_IQueryable()
{
IQueryable <int> query = Enumerable.Range(0, 10).AsQueryable().Where(n => n % 2 == 0);
var visitor = new EqualsToNotEqualsVisitor();
IQueryable queryIntercepted = query.InterceptWith(visitor);
Assert.NotNull(queryIntercepted);
Assert.Equal(typeof(int), queryIntercepted.ElementType);
Assert.Equal("QueryInterceptor.QueryTranslatorProviderAsync", queryIntercepted.Provider.ToString());
Expression <Func <int, bool> > predicate = x => x >= 0;
var queryCreated = queryIntercepted.Provider.CreateQuery(predicate);
Assert.NotNull(queryCreated);
}