Development and Integrity Management by Eli Lopian

Northwind db = new Northwind(connStr) ;
var query = from c in db.Customers
where c.City == “Sarasota“
select new { c.Name, c.City };

[TestMethod]
[VerifyMocks]
public void IsolateLinq()
{
// create fake return values
    var fake = new[] {
new {Name=“Fake 1“,City=“NY“},
new {Name=“Fake 2“,City=“London“}};

using (RecordExpectations r = new RecordExpectations())
{
// don’t hit the database, instead return test customers
         Northwind db = new Northwind(connStr) ;
var answer = from c in db.Customers
where c.City == “not-used“
select new { c.Name, c.City };
r.Return(fake);
}
CallClassUnderTest();
// Continue with test
}