public void GetSetValue()
{
Employee person = new Employee {
FirstName = "Franz",
LastName = "Huber",
Address = new Address {
City = "NY"
}
};
var path1 = PropertyPath.Create <Person, string>(p => p.FirstName);
Assert.AreEqual("Franz", path1.GetValue(person));
path1.SetValue(person, "Hans");
Assert.AreEqual("Hans", person.FirstName);
var path2 = PropertyPath.Create <Employee, string>(p => p.LastName);
Assert.AreEqual("Huber", path2.GetValue(person));
path2.SetValue(person, "Maier");
Assert.AreEqual("Maier", person.LastName);
var path3 = PropertyPath.Create <Employee, string>(p => p.Address.City);
Assert.AreEqual("NY", path3.GetValue(person));
path3.SetValue(person, "AZ");
Assert.AreEqual("AZ", person.Address.City);
person.Address = null;
AssertHelper.Throws <NullReferenceException>(() =>
path3.GetValue(person)
)
.Containing("'[Employee].Address'")
.Containing("'[Employee].Address.City'");
var path4 = PropertyPath.CreateWithDefaultValue <Employee, string>(p => p.Address.City, "-");
Assert.AreEqual("-", path4.GetValue(person));
// SetValue should be ignored...
path4.SetValue(person, "Test");
Assert.AreEqual(null, person.Address);
var path5 = PropertyPath.Create <Person, Person>(p => p);
Assert.AreEqual(person, path5.GetValue(person));
AssertHelper.Throws <InvalidOperationException>(
() => path5.SetValue(person, person)
).Containing("empty");
path5 = PropertyPath.Empty <Person>();
Assert.AreEqual(person, path5.GetValue(person));
AssertHelper.Throws <InvalidOperationException>(
() => path5.SetValue(person, person)
).Containing("empty");
}
public IValueAccessorBehavior <TValue> CreateMappedAccessor <TValue>(
Expression <Func <TSourceObject, TValue> > valueSelector
)
{
var path = PropertyPath.Concat(
_sourceObjectPath,
PropertyPath.CreateWithDefaultValue(valueSelector)
);
return(new MappedValueAccessorBehavior <TOwnerVM, TValue>(path));
}
