public void GetSetValueTest()
{
string cityname = "Brisbane";
var a = new Address()
{
City = new City() { Name = cityname, State = State.QLD }
};
Person p = new Person
{
Address = a
};
string propname = "Address.City.Name";
var npd = new NestedPropertyDescriptor(typeof(Person), propname);
// Get the value
Assert.Equal(p.Address.City.Name, npd.GetValue(p));
Assert.Equal(cityname, npd.GetValue(p));
// Set the city name
cityname = "Gold Coast";
npd.SetValue(p, cityname);
Assert.Equal(p.Address.City.Name, npd.GetValue(p));
Assert.Equal(cityname, npd.GetValue(p));
}
public void NestedINotifyPropertyChangedPropertiesTest()
{
var notifier = new NestedPropertyChangedNotifier<Person>(2);
var p = new Person();
notifier.Object = p;
Assert.PropertyChanged(notifier,
"ID",
() => p.ID = 1);
Assert.PropertyChanged(notifier,
"Address",
() => p.Address = new Address());
Assert.PropertyChanged(notifier,
"Address.City",
() => p.Address.City = new City());
}
private void button1_Click(object sender, EventArgs e)
{
var p = new Person()
{
ID = 1,
Name = "Fred",
Address = new Address()
{
Street = "100 Collins St",
City = new City()
{
Name = "Melbourne",
State = State.VIC,
PostCode = "3000"
}
}
};
list.Add(p);
p = new Person()
{
ID = 2,
Name = "Bill",
Address = new Address()
{
Street = "60 Queen St",
City = new City()
{
Name = "Brisbane",
State = State.QLD,
PostCode = "4000"
}
}
};
list.Add(p);
}
public void ListChangedEventsOnExistingListTest()
{
// Create a list and add an item
var list = new List<Person>();
var p = new Person();
list.Add(p);
// Create a NestedBindingList wrapping the existing list
var nlist = new NestedBindingList<Person>(list);
// Listen for change events
var raised = false;
ListChangedType change = default(ListChangedType);
nlist.ListChanged += (s, a) =>
{
raised = true;
change = a.ListChangedType;
};
// Set a value
p.Name = "Fred";
Assert.True(raised);
Assert.Equal(ListChangedType.ItemChanged, change);
}
public void ValueChangedEventHandlerTest()
{
// Create a person with null children
var p = new Person();
bool raised = false;
// Create a NestedPropertyDescriptor
var prop = "Address.City.Name";
var pd = new NestedPropertyDescriptor(typeof(Person), prop);
EventHandler handler = (s, a) => raised = true;
// Try to add an eventhandler
Assert.Throws<ArgumentNullException>(
() => pd.AddValueChanged(p, handler));
// Set values so there's no nulls in the tree
p.Address = new Address() { City = new City() };
// Now the eventhandler can be added
Assert.DoesNotThrow(
() => pd.AddValueChanged(p, handler));
// Setting a different property directly on an
// INotifyPropertyChanged object will not raise the event
p.Address.City.PostCode = "1234";
Assert.False(raised);
// Setting the property directly on an INotifyPropertyChanged
// object will raise the event
p.Address.City.Name = "Blah";
Assert.True(raised);
raised = false;
// Setting the property using the PropertyDescriptor
// will raise the event
pd.SetValue(p, "Blahville");
Assert.True(raised);
raised = false;
// Setting an intermediate property will remove the handler
p.Address.City = new City();
Assert.False(raised);
p.Address.City.Name = "Blahed";
Assert.False(raised);
pd.SetValue(p, "No Blah");
Assert.False(raised);
}
public void ListSortTest()
{
// Create a NestedBindingList
var list = new NestedBindingList<Person>(2);
// Add some items
list.Add(new Person());
list.Add(new Person() { Name = "Fred" });
list.Add(new Person() { Name = "Bill" });
Assert.True(list.Select(f => f.Name)
.SequenceEqual(new string[] { null, "Fred", "Bill" }));
// Sort the list on Name
list.SortBy("Name");
Assert.True(list.Select(f => f.Name)
.SequenceEqual(new string[] { null, "Bill", "Fred" }));
// Adding a new item will sort the list
list.Add(new Person() { Name = "Abigale" });
Assert.True(list.Select(f => f.Name)
.SequenceEqual(new string[] { null, "Abigale", "Bill", "Fred" }));
// Using AddNew will add a new item to the end of the list and won't sort
var item = list.AddNew();
Assert.Same(list[4], item);
// Modifying the new item also won't sort the list
item.Name = "Emily";
Assert.Same(list[4], item);
// Calling EndNew will sort
list.EndNew(4);
Assert.True(list.Select(f => f.Name)
.SequenceEqual(new string[] { null, "Abigale", "Bill", "Emily", "Fred" }));
// Removing the sort leaves things where they were
list.RemoveSort();
Assert.True(list.Select(f => f.Name)
.SequenceEqual(new string[] { null, "Abigale", "Bill", "Emily", "Fred" }));
// Sort the list on a nested property which has some
// intermediate null values in the list - descending
item = list[3];
item.Address = new Address() { City = new City() { Name = "Brisbane" } };
list.SortBy("Address.City.Name", false, false);
Assert.Same(item, list[0]);
// Setting nested properties will sort
item = list[3];
item.Address = new Address() { City = new City() { Name = "Melbourne" } };
Assert.Same(item, list[0]);
// Adding a new item will sort on the nested property
item = new Person() { Name = "Gertrude", Address = new Address() { City = new City() { Name = "Perth" } } };
list.Add(item);
Assert.Same(item, list[0]);
}
public void NestedPropertyListChangedEventsTest()
{
// Create a NestedBindingList
var list = new NestedBindingList<Person>(1);
Assert.Equal(5, list.ItemProperties.Count);
// Listen for change events
var raised = false;
ListChangedType change = default(ListChangedType);
string propname = null;
list.ListChanged += (s, a) =>
{
raised = true;
change = a.ListChangedType;
if (a.PropertyDescriptor != null)
propname = a.PropertyDescriptor.Name;
};
// Add a new item
var p = new Person() { Address = new Address() };
list.Add(p);
Assert.True(raised);
Assert.Equal(ListChangedType.ItemAdded, change);
raised = false;
// Set a value
p.Name = "Fred";
Assert.True(raised);
Assert.Equal(ListChangedType.ItemChanged, change);
Assert.Equal("Name", propname);
raised = false;
propname = null;
// Set nested properties
p.Address.City = new City();
Assert.True(raised);
Assert.Equal(ListChangedType.ItemChanged, change);
Assert.Equal("Address.City", propname);
raised = false;
propname = null;
// Set a nested property deeper than the PropertyBindingDepth
p.Address.City.Name = "Blahville";
Assert.False(raised);
// Remove the item
list.Remove(p);
Assert.True(raised);
Assert.Equal(ListChangedType.ItemDeleted, change);
raised = false;
// Changing a property on the removed item won't raise event
p.Name = "Fredrick";
Assert.False(raised);
// Add a few new items
list.Add(new Person() { Address = new Address() { City = new City() } });
list.Add(new Person());
list.Add(null); // Null value
raised = false;
// Change the PropertyBindingDepth
list.PropertyBindingDepth = 0;
Assert.True(raised);
Assert.Equal(ListChangedType.Reset, change);
raised = false;
// Change a property and make sure it still raises the event
list[0].Name = "Bill";
Assert.True(raised);
Assert.Equal(ListChangedType.ItemChanged, change);
Assert.Equal("Name", propname);
raised = false;
propname = null;
// Set a nested property deeper than the new PropertyBindingDepth
// but within the old depth shouldn't raise the event
list[0].Address.Street = "23 Foo Ave";
Assert.False(raised);
// Remove a null value
list.RemoveAt(2);
Assert.True(raised);
Assert.Equal(ListChangedType.ItemDeleted, change);
raised = false;
// Replace a value
p = list[1];
list[1] = new Person();
Assert.True(raised);
Assert.Equal(ListChangedType.ItemChanged, change);
raised = false;
// Old item doesn't raise events
p.Name = "Bob";
Assert.False(raised);
// New item does
list[1].Name = "Sherrie";
Assert.True(raised);
Assert.Equal(ListChangedType.ItemChanged, change);
Assert.Equal("Name", propname);
raised = false;
propname = null;
// Clear the list
list.Clear();
Assert.True(raised);
Assert.Equal(ListChangedType.Reset, change);
}