public void CopyFromSource ()
{
ConstantExpression constantExpression = Expression.Constant (ExpressionHelper.CreateQueryable<Cook> ());
var fromClause = new MainFromClause ("s", typeof (Cook), constantExpression);
ConstantExpression newExpression = Expression.Constant (ExpressionHelper.CreateQueryable<Kitchen>());
var sourceStub = MockRepository.GenerateStub<IFromClause>();
sourceStub.Stub (_ => _.ItemName).Return ("newItemName");
sourceStub.Stub (_ => _.ItemType).Return (typeof (Kitchen));
sourceStub.Stub (_ => _.FromExpression).Return (newExpression);
fromClause.CopyFromSource (sourceStub);
Assert.That (fromClause.ItemName, Is.EqualTo ("newItemName"));
Assert.That (fromClause.ItemType, Is.SameAs (typeof (Kitchen)));
Assert.That (fromClause.FromExpression, Is.SameAs (newExpression));
}
