src/Workspaces/CoreTestUtilities/ObjectExtensions.cs - main - githubmirror/roslyn

src/Workspaces/CoreTestUtilities/ObjectExtensions.cs

60 строк2 KB

Tomáš Matoušek

Fix test helper message to avoid NRE (#78532)

09 май 2025, 22:56

09 май 2025, 22:5613f74f7

// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.

#nullable disable

using System;
using System.Reflection;

namespace Microsoft.CodeAnalysis.UnitTests;

public static class ObjectExtensions
{
    public static PropertyType GetPropertyValue<PropertyType>(this object instance, string propertyName)
    {
        return (PropertyType)GetPropertyValue(instance, propertyName);
    }

    public static object GetPropertyValue(this object instance, string propertyName)
    {
        var type = instance.GetType();
        var propertyInfo = type.GetProperty(propertyName, BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
        if (propertyInfo == null)
        {
            throw new ArgumentException("Property " + propertyName + " was not found on type " + type.ToString());
        }

        var result = propertyInfo.GetValue(instance, null);
        return result;
    }

    public static object GetFieldValue(this object instance, string fieldName)
    {
        var type = instance.GetType();
        FieldInfo fieldInfo = null;
        while (type != null)
        {
            fieldInfo = type.GetField(fieldName, BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
            if (fieldInfo != null)
            {
                break;
            }

            type = type.BaseType;
        }

        if (fieldInfo == null)
        {
            throw new FieldAccessException($"Field '{fieldName}' was not found on type '{instance.GetType()}'");
        }

        var result = fieldInfo.GetValue(instance);
        return result; // you can place a breakpoint here (for debugging purposes)
    }

    public static FieldType GetFieldValue<FieldType>(this object instance, string fieldName)
    {
        return (FieldType)GetFieldValue(instance, fieldName);
    }
}