// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT license. See LICENSE file in the project root for full license information.

using System;

namespace Microsoft.VisualStudio.TestPlatform.ObjectModel;

/// <summary>
/// This attribute is applied to extensions so they can be uniquely identified.
/// It indicates the Uri which uniquely identifies the extension.  If this attribute
/// is not provided on the extensions such as the Test Executor or Test Logger, then
/// the extensions will not be used.
/// </summary>
[AttributeUsage(AttributeTargets.Class, AllowMultiple = false)]
public sealed class ExtensionUriAttribute : Attribute
{
    /// <summary>
    /// Initializes with the Uri of the extension.
    /// </summary>
    /// <param name="extensionUri">The Uri of the extension</param>
    public ExtensionUriAttribute(string extensionUri)
    {
        ValidateArg.NotNullOrWhiteSpace(extensionUri, nameof(extensionUri));
        ExtensionUri = extensionUri;
    }

    /// <summary>
    /// The Uri of the Test Executor.
    /// </summary>
    public string ExtensionUri { get; private set; }

}