PropertyConstraint
PropertyConstraint extracts a named property and uses
its value as the actual value for a chained constraint.
using NUnit.Framework.Internal;
using System;
using System.Reflection;
using System.Runtime.CompilerServices;
namespace NUnit.Framework.Constraints
{
[System.Runtime.CompilerServices.NullableContext(1)]
[System.Runtime.CompilerServices.Nullable(0)]
public class PropertyConstraint : PrefixConstraint
{
private readonly string _name;
[System.Runtime.CompilerServices.Nullable(2)]
private object _propValue;
public PropertyConstraint(string name, IConstraint baseConstraint)
: base(baseConstraint, "property " + name)
{
_name = name;
}
public override ConstraintResult ApplyTo<[System.Runtime.CompilerServices.Nullable(2)] TActual>(TActual actual)
{
Guard.ArgumentNotNull(actual, "actual");
PropertyInfo ultimateShadowingProperty = Reflect.GetUltimateShadowingProperty(typeof(TActual), _name, BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
if ((object)ultimateShadowingProperty == null && typeof(TActual).IsInterface) {
Type[] interfaces = typeof(TActual).GetInterfaces();
foreach (Type type in interfaces) {
ultimateShadowingProperty = Reflect.GetUltimateShadowingProperty(type, _name, BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
if ((object)ultimateShadowingProperty != null)
break;
}
}
if ((object)ultimateShadowingProperty == null) {
Type type2 = actual as Type;
if ((object)type2 != null)
ultimateShadowingProperty = Reflect.GetUltimateShadowingProperty(type2, _name, BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
if ((object)ultimateShadowingProperty == null) {
type2 = actual.GetType();
ultimateShadowingProperty = Reflect.GetUltimateShadowingProperty(type2, _name, BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
if ((object)ultimateShadowingProperty == null)
throw new ArgumentException($"""{_name}""{type2}""", "_name");
}
}
_propValue = ultimateShadowingProperty.GetValue(actual, null);
ConstraintResult baseResult = base.BaseConstraint.ApplyTo(_propValue);
return new PropertyConstraintResult(this, baseResult);
}
protected override string GetStringRepresentation()
{
return $"""{_name}""{base.BaseConstraint}""";
}
}
}