public void Task_02_PropertyChange_01_Normal()
{
CreateViewModel <ViewModel>(out var vm);
ValueChangedArgs <string> nameArgs = null;
var dName = vm.HookChange(v => v.Name, (_, e) => nameArgs = e);
ValueChangedArgs <int> ageArgs = null;
var dAge = vm.HookChange(v => v.Age, (_, e) => ageArgs = e);
string property = null;
var dAll = vm.HookChange((_, e) => property = e.PropertyName);
vm.Name = null;
Assert.That(nameArgs == null);
vm.Name = "ABC";
Assert.That(nameArgs != null);
Assert.That(nameArgs.PropertyArgs.PropertyName == "Name");
Assert.That(nameArgs.OldValue == null);
Assert.That(nameArgs.NewValue == "ABC");
Assert.That(nameArgs.ToString() == "Name: <null>=>ABC");
Assert.That(vm.Name == "ABC");
Assert.That(property == "Name");
nameArgs = null;
vm.Age = 123;
Assert.That(nameArgs == null);
Assert.That(ageArgs.ToString() == "Age: 0=>123");
Assert.That(property == "Age");
dName.Dispose();
dAge.Dispose();
dAll.Dispose();
}
public void Task_03_Property_Interface()
{
CreateViewModel <ViewModel>(out var vm);
var properties = vm.GetProperties();
foreach (var p in properties)
{
Console.WriteLine($"{p.NameArgs.PropertyName}: {p.Type}, {p.Value}");
}
var property = properties.First(v => v.NameArgs.PropertyName == "Name");
Assert.That(property.ToString() == $"{vm.GetType()} Name:{property.Value.ToStringEx()}");
ValueChangedArgs <object> nameArgs = null;
using (var dName = property.HookChange((_, e) => nameArgs = e))
{
property.Value = "ABC";
Assert.That(nameArgs.PropertyArgs.PropertyName == "Name");
Assert.That(nameArgs.OldValue == null);
Assert.That((string)nameArgs.NewValue == "ABC");
Assert.That(nameArgs.ToString() == "Name: <null>=>ABC");
}
}
public void Task_02_ValueChanged()
{
var vm = new TestViewModel();
var property = new Property <TestViewModel, string>(vm, new PropertyChangedEventArgs("ABC"));
ValueChangedArgs <string> args = null;
void OnValueChanged(object sender, ValueChangedArgs <string> e)
{
args = e;
}
using (property.HookChange(OnValueChanged))
{
property.Value = "Value";
Assert.That(property.Value == "Value");
Assert.That(args.NewValue == "Value");
Assert.That(args.PropertyArgs == property.NameArgs);
Assert.That(args.ToString() == $"ABC: <null>=>Value");
}
}
