public void Collections()
{
Common.Reset();
using (Database database = Database.Get(Common.DatabaseName))
{
database.Add("Doc", "<Doc/>");
Element elem = database.GetDocument("Doc").Root;
Assert.IsNotNull(elem);
// Add content
List <int> numbers = new List <int>();
using (new Updates())
{
for (int c = 0; c < 10; c++)
{
elem.Append(String.Format("<A x='{0}'><B y='{1}'>{2}</B><C>{3}</C></A>",
c, c * 2, c * 3, c * 4));
numbers.Add(c);
}
}
// Create and attach a dictionary
PersistentDictionary <int, string> dictionary = new PersistentDictionary <int, string>(
new PersistentKvpCollectionAttribute()
{
Query = ".", ItemQuery = "./A",
KeyAttributeName = "x", ValueElementName = "C"
});
dictionary.Attach(elem);
CollectionAssert.AreEqual(numbers, dictionary.Keys);
CollectionAssert.AreEqual(numbers.Select(n => (n * 4).ToString()), dictionary.Values);
// Create and attach a list
PersistentList <int> list = new PersistentList <int>(
new PersistentCollectionAttribute()
{
Query = ".", ItemQuery = "./A/B"
});
list.Attach(elem);
CollectionAssert.AreEqual(numbers.Select(n => n * 3), list);
// Change the database (remove every other)
for (int c = 9; c >= 0; c -= 2)
{
elem.Child(c).Remove();
numbers.RemoveAt(c);
}
Manager.Default.FetchAll();
CollectionAssert.AreEqual(numbers, dictionary.Keys);
CollectionAssert.AreEqual(numbers.Select(n => (n * 4).ToString()), dictionary.Values);
CollectionAssert.AreEqual(numbers.Select(n => n * 3), list);
// Change the dictionary and attempt to store
dictionary.Add(20, (20 * 4).ToString());
Assert.Throws(Is.InstanceOf <Exception>(), dictionary.Store);
// Refetch and verify
dictionary.Fetch();
CollectionAssert.AreEqual(numbers, dictionary.Keys);
CollectionAssert.AreEqual(numbers.Select(n => (n * 4).ToString()), dictionary.Values);
}
}
